X-Git-Url: https://git.openstreetmap.org./rails.git/blobdiff_plain/ca5de5b4e01297b07ce3a9db45e908f15f7cda11..0814b4096c443e2ab3c09baa058aa81a00d205d1:/vendor/assets/iD/iD.js?ds=sidebyside
diff --git a/vendor/assets/iD/iD.js b/vendor/assets/iD/iD.js
index 84eabfdad..681ebc840 100644
--- a/vendor/assets/iD/iD.js
+++ b/vendor/assets/iD/iD.js
@@ -1,40562 +1,71437 @@
-(function(exports) {
-
- var bootstrap = (typeof exports.bootstrap === "object") ?
- exports.bootstrap :
- (exports.bootstrap = {});
+(function () {
+function actionAddEntity(way) {
+ return function(graph) {
+ return graph.replace(way);
+ };
+}
- bootstrap.tooltip = function() {
+var commonjsGlobal = typeof window !== 'undefined' ? window : typeof global !== 'undefined' ? global : typeof self !== 'undefined' ? self : {};
- var tooltip = function(selection) {
- selection.each(setup);
- },
- animation = d3.functor(false),
- html = d3.functor(false),
- title = function() {
- var title = this.getAttribute("data-original-title");
- if (title) {
- return title;
- } else {
- title = this.getAttribute("title");
- this.removeAttribute("title");
- this.setAttribute("data-original-title", title);
- }
- return title;
- },
- over = "mouseenter.tooltip",
- out = "mouseleave.tooltip",
- placements = "top left bottom right".split(" "),
- placement = d3.functor("top");
-
- tooltip.title = function(_) {
- if (arguments.length) {
- title = d3.functor(_);
- return tooltip;
- } else {
- return title;
- }
- };
+function commonjsRequire () {
+ throw new Error('Dynamic requires are not currently supported by rollup-plugin-commonjs');
+}
- tooltip.html = function(_) {
- if (arguments.length) {
- html = d3.functor(_);
- return tooltip;
- } else {
- return html;
- }
- };
- tooltip.placement = function(_) {
- if (arguments.length) {
- placement = d3.functor(_);
- return tooltip;
- } else {
- return placement;
- }
- };
- tooltip.show = function(selection) {
- selection.each(show);
- };
+function createCommonjsModule(fn, module) {
+ return module = { exports: {} }, fn(module, module.exports), module.exports;
+}
- tooltip.hide = function(selection) {
- selection.each(hide);
- };
+var lodash = createCommonjsModule(function (module, exports) {
+/**
+ * @license
+ * Lodash
+ * Copyright JS Foundation and other contributors
+ * Released under MIT license
+ * Based on Underscore.js 1.8.3
+ * Copyright Jeremy Ashkenas, DocumentCloud and Investigative Reporters & Editors
+ */
+(function() {
- tooltip.toggle = function(selection) {
- selection.each(toggle);
- };
+ /** Used as a safe reference for `undefined` in pre-ES5 environments. */
+ var undefined;
- tooltip.destroy = function(selection) {
- selection
- .on(over, null)
- .on(out, null)
- .attr("title", function() {
- return this.getAttribute("data-original-title") || this.getAttribute("title");
- })
- .attr("data-original-title", null)
- .select(".tooltip")
- .remove();
- };
+ /** Used as the semantic version number. */
+ var VERSION = '4.17.4';
- function setup() {
- var root = d3.select(this),
- animate = animation.apply(this, arguments),
- tip = root.append("div")
- .attr("class", "tooltip");
+ /** Used as the size to enable large array optimizations. */
+ var LARGE_ARRAY_SIZE = 200;
- if (animate) {
- tip.classed("fade", true);
- }
+ /** Error message constants. */
+ var CORE_ERROR_TEXT = 'Unsupported core-js use. Try https://npms.io/search?q=ponyfill.',
+ FUNC_ERROR_TEXT = 'Expected a function';
- // TODO "inside" checks?
+ /** Used to stand-in for `undefined` hash values. */
+ var HASH_UNDEFINED = '__lodash_hash_undefined__';
- tip.append("div")
- .attr("class", "tooltip-arrow");
- tip.append("div")
- .attr("class", "tooltip-inner");
+ /** Used as the maximum memoize cache size. */
+ var MAX_MEMOIZE_SIZE = 500;
- var place = placement.apply(this, arguments);
- tip.classed(place, true);
+ /** Used as the internal argument placeholder. */
+ var PLACEHOLDER = '__lodash_placeholder__';
- root.on(over, show);
- root.on(out, hide);
- }
+ /** Used to compose bitmasks for cloning. */
+ var CLONE_DEEP_FLAG = 1,
+ CLONE_FLAT_FLAG = 2,
+ CLONE_SYMBOLS_FLAG = 4;
+
+ /** Used to compose bitmasks for value comparisons. */
+ var COMPARE_PARTIAL_FLAG = 1,
+ COMPARE_UNORDERED_FLAG = 2;
+
+ /** Used to compose bitmasks for function metadata. */
+ var WRAP_BIND_FLAG = 1,
+ WRAP_BIND_KEY_FLAG = 2,
+ WRAP_CURRY_BOUND_FLAG = 4,
+ WRAP_CURRY_FLAG = 8,
+ WRAP_CURRY_RIGHT_FLAG = 16,
+ WRAP_PARTIAL_FLAG = 32,
+ WRAP_PARTIAL_RIGHT_FLAG = 64,
+ WRAP_ARY_FLAG = 128,
+ WRAP_REARG_FLAG = 256,
+ WRAP_FLIP_FLAG = 512;
+
+ /** Used as default options for `_.truncate`. */
+ var DEFAULT_TRUNC_LENGTH = 30,
+ DEFAULT_TRUNC_OMISSION = '...';
+
+ /** Used to detect hot functions by number of calls within a span of milliseconds. */
+ var HOT_COUNT = 800,
+ HOT_SPAN = 16;
- function show() {
- var root = d3.select(this),
- content = title.apply(this, arguments),
- tip = root.select(".tooltip")
- .classed("in", true),
- markup = html.apply(this, arguments),
- innercontent = tip.select(".tooltip-inner")[markup ? "html" : "text"](content),
- place = placement.apply(this, arguments),
- outer = getPosition(root.node()),
- inner = getPosition(tip.node()),
- pos;
+ /** Used to indicate the type of lazy iteratees. */
+ var LAZY_FILTER_FLAG = 1,
+ LAZY_MAP_FLAG = 2,
+ LAZY_WHILE_FLAG = 3;
- switch (place) {
- case "top":
- pos = {x: outer.x + (outer.w - inner.w) / 2, y: outer.y - inner.h};
- break;
- case "right":
- pos = {x: outer.x + outer.w, y: outer.y + (outer.h - inner.h) / 2};
- break;
- case "left":
- pos = {x: outer.x - inner.w, y: outer.y + (outer.h - inner.h) / 2};
- break;
- case "bottom":
- pos = {x: Math.max(0, outer.x + (outer.w - inner.w) / 2), y: outer.y + outer.h};
- break;
- }
+ /** Used as references for various `Number` constants. */
+ var INFINITY = 1 / 0,
+ MAX_SAFE_INTEGER = 9007199254740991,
+ MAX_INTEGER = 1.7976931348623157e+308,
+ NAN = 0 / 0;
- tip.style(pos ?
- {left: ~~pos.x + "px", top: ~~pos.y + "px"} :
- {left: null, top: null});
+ /** Used as references for the maximum length and index of an array. */
+ var MAX_ARRAY_LENGTH = 4294967295,
+ MAX_ARRAY_INDEX = MAX_ARRAY_LENGTH - 1,
+ HALF_MAX_ARRAY_LENGTH = MAX_ARRAY_LENGTH >>> 1;
- this.tooltipVisible = true;
- }
+ /** Used to associate wrap methods with their bit flags. */
+ var wrapFlags = [
+ ['ary', WRAP_ARY_FLAG],
+ ['bind', WRAP_BIND_FLAG],
+ ['bindKey', WRAP_BIND_KEY_FLAG],
+ ['curry', WRAP_CURRY_FLAG],
+ ['curryRight', WRAP_CURRY_RIGHT_FLAG],
+ ['flip', WRAP_FLIP_FLAG],
+ ['partial', WRAP_PARTIAL_FLAG],
+ ['partialRight', WRAP_PARTIAL_RIGHT_FLAG],
+ ['rearg', WRAP_REARG_FLAG]
+ ];
- function hide() {
- d3.select(this).select(".tooltip")
- .classed("in", false);
+ /** `Object#toString` result references. */
+ var argsTag = '[object Arguments]',
+ arrayTag = '[object Array]',
+ asyncTag = '[object AsyncFunction]',
+ boolTag = '[object Boolean]',
+ dateTag = '[object Date]',
+ domExcTag = '[object DOMException]',
+ errorTag = '[object Error]',
+ funcTag = '[object Function]',
+ genTag = '[object GeneratorFunction]',
+ mapTag = '[object Map]',
+ numberTag = '[object Number]',
+ nullTag = '[object Null]',
+ objectTag = '[object Object]',
+ promiseTag = '[object Promise]',
+ proxyTag = '[object Proxy]',
+ regexpTag = '[object RegExp]',
+ setTag = '[object Set]',
+ stringTag = '[object String]',
+ symbolTag = '[object Symbol]',
+ undefinedTag = '[object Undefined]',
+ weakMapTag = '[object WeakMap]',
+ weakSetTag = '[object WeakSet]';
- this.tooltipVisible = false;
- }
+ var arrayBufferTag = '[object ArrayBuffer]',
+ dataViewTag = '[object DataView]',
+ float32Tag = '[object Float32Array]',
+ float64Tag = '[object Float64Array]',
+ int8Tag = '[object Int8Array]',
+ int16Tag = '[object Int16Array]',
+ int32Tag = '[object Int32Array]',
+ uint8Tag = '[object Uint8Array]',
+ uint8ClampedTag = '[object Uint8ClampedArray]',
+ uint16Tag = '[object Uint16Array]',
+ uint32Tag = '[object Uint32Array]';
- function toggle() {
- if (this.tooltipVisible) {
- hide.apply(this, arguments);
- } else {
- show.apply(this, arguments);
- }
- }
+ /** Used to match empty string literals in compiled template source. */
+ var reEmptyStringLeading = /\b__p \+= '';/g,
+ reEmptyStringMiddle = /\b(__p \+=) '' \+/g,
+ reEmptyStringTrailing = /(__e\(.*?\)|\b__t\)) \+\n'';/g;
- return tooltip;
- };
+ /** Used to match HTML entities and HTML characters. */
+ var reEscapedHtml = /&(?:amp|lt|gt|quot|#39);/g,
+ reUnescapedHtml = /[&<>"']/g,
+ reHasEscapedHtml = RegExp(reEscapedHtml.source),
+ reHasUnescapedHtml = RegExp(reUnescapedHtml.source);
- function getPosition(node) {
- var mode = d3.select(node).style('position');
- if (mode === 'absolute' || mode === 'static') {
- return {
- x: node.offsetLeft,
- y: node.offsetTop,
- w: node.offsetWidth,
- h: node.offsetHeight
- };
- } else {
- return {
- x: 0,
- y: 0,
- w: node.offsetWidth,
- h: node.offsetHeight
- };
- }
- }
+ /** Used to match template delimiters. */
+ var reEscape = /<%-([\s\S]+?)%>/g,
+ reEvaluate = /<%([\s\S]+?)%>/g,
+ reInterpolate = /<%=([\s\S]+?)%>/g;
-})(this);
-!function(){
- var d3 = {version: "3.5.5"}; // semver
-d3.ascending = d3_ascending;
+ /** Used to match property names within property paths. */
+ var reIsDeepProp = /\.|\[(?:[^[\]]*|(["'])(?:(?!\1)[^\\]|\\.)*?\1)\]/,
+ reIsPlainProp = /^\w*$/,
+ reLeadingDot = /^\./,
+ rePropName = /[^.[\]]+|\[(?:(-?\d+(?:\.\d+)?)|(["'])((?:(?!\2)[^\\]|\\.)*?)\2)\]|(?=(?:\.|\[\])(?:\.|\[\]|$))/g;
-function d3_ascending(a, b) {
- return a < b ? -1 : a > b ? 1 : a >= b ? 0 : NaN;
-}
-d3.descending = function(a, b) {
- return b < a ? -1 : b > a ? 1 : b >= a ? 0 : NaN;
-};
-d3.min = function(array, f) {
- var i = -1,
- n = array.length,
- a,
- b;
- if (arguments.length === 1) {
- while (++i < n) if ((b = array[i]) != null && b >= b) { a = b; break; }
- while (++i < n) if ((b = array[i]) != null && a > b) a = b;
- } else {
- while (++i < n) if ((b = f.call(array, array[i], i)) != null && b >= b) { a = b; break; }
- while (++i < n) if ((b = f.call(array, array[i], i)) != null && a > b) a = b;
- }
- return a;
-};
-d3.max = function(array, f) {
- var i = -1,
- n = array.length,
- a,
- b;
- if (arguments.length === 1) {
- while (++i < n) if ((b = array[i]) != null && b >= b) { a = b; break; }
- while (++i < n) if ((b = array[i]) != null && b > a) a = b;
- } else {
- while (++i < n) if ((b = f.call(array, array[i], i)) != null && b >= b) { a = b; break; }
- while (++i < n) if ((b = f.call(array, array[i], i)) != null && b > a) a = b;
- }
- return a;
-};
-d3.extent = function(array, f) {
- var i = -1,
- n = array.length,
- a,
- b,
- c;
- if (arguments.length === 1) {
- while (++i < n) if ((b = array[i]) != null && b >= b) { a = c = b; break; }
- while (++i < n) if ((b = array[i]) != null) {
- if (a > b) a = b;
- if (c < b) c = b;
- }
- } else {
- while (++i < n) if ((b = f.call(array, array[i], i)) != null && b >= b) { a = c = b; break; }
- while (++i < n) if ((b = f.call(array, array[i], i)) != null) {
- if (a > b) a = b;
- if (c < b) c = b;
- }
- }
- return [a, c];
-};
-function d3_number(x) {
- return x === null ? NaN : +x;
-}
+ /**
+ * Used to match `RegExp`
+ * [syntax characters](http://ecma-international.org/ecma-262/7.0/#sec-patterns).
+ */
+ var reRegExpChar = /[\\^$.*+?()[\]{}|]/g,
+ reHasRegExpChar = RegExp(reRegExpChar.source);
-function d3_numeric(x) {
- return !isNaN(x);
-}
+ /** Used to match leading and trailing whitespace. */
+ var reTrim = /^\s+|\s+$/g,
+ reTrimStart = /^\s+/,
+ reTrimEnd = /\s+$/;
-d3.sum = function(array, f) {
- var s = 0,
- n = array.length,
- a,
- i = -1;
- if (arguments.length === 1) {
- while (++i < n) if (d3_numeric(a = +array[i])) s += a; // zero and null are equivalent
- } else {
- while (++i < n) if (d3_numeric(a = +f.call(array, array[i], i))) s += a;
- }
- return s;
-};
+ /** Used to match wrap detail comments. */
+ var reWrapComment = /\{(?:\n\/\* \[wrapped with .+\] \*\/)?\n?/,
+ reWrapDetails = /\{\n\/\* \[wrapped with (.+)\] \*/,
+ reSplitDetails = /,? & /;
-d3.mean = function(array, f) {
- var s = 0,
- n = array.length,
- a,
- i = -1,
- j = n;
- if (arguments.length === 1) {
- while (++i < n) if (d3_numeric(a = d3_number(array[i]))) s += a; else --j;
- } else {
- while (++i < n) if (d3_numeric(a = d3_number(f.call(array, array[i], i)))) s += a; else --j;
- }
- if (j) return s / j;
-};
-// R-7 per
-d3.quantile = function(values, p) {
- var H = (values.length - 1) * p + 1,
- h = Math.floor(H),
- v = +values[h - 1],
- e = H - h;
- return e ? v + e * (values[h] - v) : v;
-};
+ /** Used to match words composed of alphanumeric characters. */
+ var reAsciiWord = /[^\x00-\x2f\x3a-\x40\x5b-\x60\x7b-\x7f]+/g;
-d3.median = function(array, f) {
- var numbers = [],
- n = array.length,
- a,
- i = -1;
- if (arguments.length === 1) {
- while (++i < n) if (d3_numeric(a = d3_number(array[i]))) numbers.push(a);
- } else {
- while (++i < n) if (d3_numeric(a = d3_number(f.call(array, array[i], i)))) numbers.push(a);
- }
- if (numbers.length) return d3.quantile(numbers.sort(d3_ascending), .5);
-};
+ /** Used to match backslashes in property paths. */
+ var reEscapeChar = /\\(\\)?/g;
-d3.variance = function(array, f) {
- var n = array.length,
- m = 0,
- a,
- d,
- s = 0,
- i = -1,
- j = 0;
- if (arguments.length === 1) {
- while (++i < n) {
- if (d3_numeric(a = d3_number(array[i]))) {
- d = a - m;
- m += d / ++j;
- s += d * (a - m);
- }
- }
- } else {
- while (++i < n) {
- if (d3_numeric(a = d3_number(f.call(array, array[i], i)))) {
- d = a - m;
- m += d / ++j;
- s += d * (a - m);
- }
- }
- }
- if (j > 1) return s / (j - 1);
-};
+ /**
+ * Used to match
+ * [ES template delimiters](http://ecma-international.org/ecma-262/7.0/#sec-template-literal-lexical-components).
+ */
+ var reEsTemplate = /\$\{([^\\}]*(?:\\.[^\\}]*)*)\}/g;
-d3.deviation = function() {
- var v = d3.variance.apply(this, arguments);
- return v ? Math.sqrt(v) : v;
-};
+ /** Used to match `RegExp` flags from their coerced string values. */
+ var reFlags = /\w*$/;
-function d3_bisector(compare) {
- return {
- left: function(a, x, lo, hi) {
- if (arguments.length < 3) lo = 0;
- if (arguments.length < 4) hi = a.length;
- while (lo < hi) {
- var mid = lo + hi >>> 1;
- if (compare(a[mid], x) < 0) lo = mid + 1;
- else hi = mid;
- }
- return lo;
- },
- right: function(a, x, lo, hi) {
- if (arguments.length < 3) lo = 0;
- if (arguments.length < 4) hi = a.length;
- while (lo < hi) {
- var mid = lo + hi >>> 1;
- if (compare(a[mid], x) > 0) hi = mid;
- else lo = mid + 1;
- }
- return lo;
- }
- };
-}
+ /** Used to detect bad signed hexadecimal string values. */
+ var reIsBadHex = /^[-+]0x[0-9a-f]+$/i;
-var d3_bisect = d3_bisector(d3_ascending);
-d3.bisectLeft = d3_bisect.left;
-d3.bisect = d3.bisectRight = d3_bisect.right;
+ /** Used to detect binary string values. */
+ var reIsBinary = /^0b[01]+$/i;
-d3.bisector = function(f) {
- return d3_bisector(f.length === 1
- ? function(d, x) { return d3_ascending(f(d), x); }
- : f);
-};
-d3.shuffle = function(array, i0, i1) {
- if ((m = arguments.length) < 3) { i1 = array.length; if (m < 2) i0 = 0; }
- var m = i1 - i0, t, i;
- while (m) {
- i = Math.random() * m-- | 0;
- t = array[m + i0], array[m + i0] = array[i + i0], array[i + i0] = t;
- }
- return array;
-};
-d3.permute = function(array, indexes) {
- var i = indexes.length, permutes = new Array(i);
- while (i--) permutes[i] = array[indexes[i]];
- return permutes;
-};
-d3.pairs = function(array) {
- var i = 0, n = array.length - 1, p0, p1 = array[0], pairs = new Array(n < 0 ? 0 : n);
- while (i < n) pairs[i] = [p0 = p1, p1 = array[++i]];
- return pairs;
-};
+ /** Used to detect host constructors (Safari). */
+ var reIsHostCtor = /^\[object .+?Constructor\]$/;
-d3.zip = function() {
- if (!(n = arguments.length)) return [];
- for (var i = -1, m = d3.min(arguments, d3_zipLength), zips = new Array(m); ++i < m;) {
- for (var j = -1, n, zip = zips[i] = new Array(n); ++j < n;) {
- zip[j] = arguments[j][i];
- }
- }
- return zips;
-};
+ /** Used to detect octal string values. */
+ var reIsOctal = /^0o[0-7]+$/i;
-function d3_zipLength(d) {
- return d.length;
-}
+ /** Used to detect unsigned integer values. */
+ var reIsUint = /^(?:0|[1-9]\d*)$/;
+
+ /** Used to match Latin Unicode letters (excluding mathematical operators). */
+ var reLatin = /[\xc0-\xd6\xd8-\xf6\xf8-\xff\u0100-\u017f]/g;
+
+ /** Used to ensure capturing order of template delimiters. */
+ var reNoMatch = /($^)/;
+
+ /** Used to match unescaped characters in compiled string literals. */
+ var reUnescapedString = /['\n\r\u2028\u2029\\]/g;
+
+ /** Used to compose unicode character classes. */
+ var rsAstralRange = '\\ud800-\\udfff',
+ rsComboMarksRange = '\\u0300-\\u036f',
+ reComboHalfMarksRange = '\\ufe20-\\ufe2f',
+ rsComboSymbolsRange = '\\u20d0-\\u20ff',
+ rsComboRange = rsComboMarksRange + reComboHalfMarksRange + rsComboSymbolsRange,
+ rsDingbatRange = '\\u2700-\\u27bf',
+ rsLowerRange = 'a-z\\xdf-\\xf6\\xf8-\\xff',
+ rsMathOpRange = '\\xac\\xb1\\xd7\\xf7',
+ rsNonCharRange = '\\x00-\\x2f\\x3a-\\x40\\x5b-\\x60\\x7b-\\xbf',
+ rsPunctuationRange = '\\u2000-\\u206f',
+ rsSpaceRange = ' \\t\\x0b\\f\\xa0\\ufeff\\n\\r\\u2028\\u2029\\u1680\\u180e\\u2000\\u2001\\u2002\\u2003\\u2004\\u2005\\u2006\\u2007\\u2008\\u2009\\u200a\\u202f\\u205f\\u3000',
+ rsUpperRange = 'A-Z\\xc0-\\xd6\\xd8-\\xde',
+ rsVarRange = '\\ufe0e\\ufe0f',
+ rsBreakRange = rsMathOpRange + rsNonCharRange + rsPunctuationRange + rsSpaceRange;
+
+ /** Used to compose unicode capture groups. */
+ var rsApos = "['\u2019]",
+ rsAstral = '[' + rsAstralRange + ']',
+ rsBreak = '[' + rsBreakRange + ']',
+ rsCombo = '[' + rsComboRange + ']',
+ rsDigits = '\\d+',
+ rsDingbat = '[' + rsDingbatRange + ']',
+ rsLower = '[' + rsLowerRange + ']',
+ rsMisc = '[^' + rsAstralRange + rsBreakRange + rsDigits + rsDingbatRange + rsLowerRange + rsUpperRange + ']',
+ rsFitz = '\\ud83c[\\udffb-\\udfff]',
+ rsModifier = '(?:' + rsCombo + '|' + rsFitz + ')',
+ rsNonAstral = '[^' + rsAstralRange + ']',
+ rsRegional = '(?:\\ud83c[\\udde6-\\uddff]){2}',
+ rsSurrPair = '[\\ud800-\\udbff][\\udc00-\\udfff]',
+ rsUpper = '[' + rsUpperRange + ']',
+ rsZWJ = '\\u200d';
+
+ /** Used to compose unicode regexes. */
+ var rsMiscLower = '(?:' + rsLower + '|' + rsMisc + ')',
+ rsMiscUpper = '(?:' + rsUpper + '|' + rsMisc + ')',
+ rsOptContrLower = '(?:' + rsApos + '(?:d|ll|m|re|s|t|ve))?',
+ rsOptContrUpper = '(?:' + rsApos + '(?:D|LL|M|RE|S|T|VE))?',
+ reOptMod = rsModifier + '?',
+ rsOptVar = '[' + rsVarRange + ']?',
+ rsOptJoin = '(?:' + rsZWJ + '(?:' + [rsNonAstral, rsRegional, rsSurrPair].join('|') + ')' + rsOptVar + reOptMod + ')*',
+ rsOrdLower = '\\d*(?:(?:1st|2nd|3rd|(?![123])\\dth)\\b)',
+ rsOrdUpper = '\\d*(?:(?:1ST|2ND|3RD|(?![123])\\dTH)\\b)',
+ rsSeq = rsOptVar + reOptMod + rsOptJoin,
+ rsEmoji = '(?:' + [rsDingbat, rsRegional, rsSurrPair].join('|') + ')' + rsSeq,
+ rsSymbol = '(?:' + [rsNonAstral + rsCombo + '?', rsCombo, rsRegional, rsSurrPair, rsAstral].join('|') + ')';
+
+ /** Used to match apostrophes. */
+ var reApos = RegExp(rsApos, 'g');
-d3.transpose = function(matrix) {
- return d3.zip.apply(d3, matrix);
-};
-d3.keys = function(map) {
- var keys = [];
- for (var key in map) keys.push(key);
- return keys;
-};
-d3.values = function(map) {
- var values = [];
- for (var key in map) values.push(map[key]);
- return values;
-};
-d3.entries = function(map) {
- var entries = [];
- for (var key in map) entries.push({key: key, value: map[key]});
- return entries;
-};
-d3.merge = function(arrays) {
- var n = arrays.length,
- m,
- i = -1,
- j = 0,
- merged,
- array;
+ /**
+ * Used to match [combining diacritical marks](https://en.wikipedia.org/wiki/Combining_Diacritical_Marks) and
+ * [combining diacritical marks for symbols](https://en.wikipedia.org/wiki/Combining_Diacritical_Marks_for_Symbols).
+ */
+ var reComboMark = RegExp(rsCombo, 'g');
+
+ /** Used to match [string symbols](https://mathiasbynens.be/notes/javascript-unicode). */
+ var reUnicode = RegExp(rsFitz + '(?=' + rsFitz + ')|' + rsSymbol + rsSeq, 'g');
+
+ /** Used to match complex or compound words. */
+ var reUnicodeWord = RegExp([
+ rsUpper + '?' + rsLower + '+' + rsOptContrLower + '(?=' + [rsBreak, rsUpper, '$'].join('|') + ')',
+ rsMiscUpper + '+' + rsOptContrUpper + '(?=' + [rsBreak, rsUpper + rsMiscLower, '$'].join('|') + ')',
+ rsUpper + '?' + rsMiscLower + '+' + rsOptContrLower,
+ rsUpper + '+' + rsOptContrUpper,
+ rsOrdUpper,
+ rsOrdLower,
+ rsDigits,
+ rsEmoji
+ ].join('|'), 'g');
+
+ /** Used to detect strings with [zero-width joiners or code points from the astral planes](http://eev.ee/blog/2015/09/12/dark-corners-of-unicode/). */
+ var reHasUnicode = RegExp('[' + rsZWJ + rsAstralRange + rsComboRange + rsVarRange + ']');
+
+ /** Used to detect strings that need a more robust regexp to match words. */
+ var reHasUnicodeWord = /[a-z][A-Z]|[A-Z]{2,}[a-z]|[0-9][a-zA-Z]|[a-zA-Z][0-9]|[^a-zA-Z0-9 ]/;
+
+ /** Used to assign default `context` object properties. */
+ var contextProps = [
+ 'Array', 'Buffer', 'DataView', 'Date', 'Error', 'Float32Array', 'Float64Array',
+ 'Function', 'Int8Array', 'Int16Array', 'Int32Array', 'Map', 'Math', 'Object',
+ 'Promise', 'RegExp', 'Set', 'String', 'Symbol', 'TypeError', 'Uint8Array',
+ 'Uint8ClampedArray', 'Uint16Array', 'Uint32Array', 'WeakMap',
+ '_', 'clearTimeout', 'isFinite', 'parseInt', 'setTimeout'
+ ];
- while (++i < n) j += arrays[i].length;
- merged = new Array(j);
+ /** Used to make template sourceURLs easier to identify. */
+ var templateCounter = -1;
- while (--n >= 0) {
- array = arrays[n];
- m = array.length;
- while (--m >= 0) {
- merged[--j] = array[m];
- }
- }
-
- return merged;
-};
-var abs = Math.abs;
-
-d3.range = function(start, stop, step) {
- if (arguments.length < 3) {
- step = 1;
- if (arguments.length < 2) {
- stop = start;
- start = 0;
- }
- }
- if ((stop - start) / step === Infinity) throw new Error("infinite range");
- var range = [],
- k = d3_range_integerScale(abs(step)),
- i = -1,
- j;
- start *= k, stop *= k, step *= k;
- if (step < 0) while ((j = start + step * ++i) > stop) range.push(j / k);
- else while ((j = start + step * ++i) < stop) range.push(j / k);
- return range;
-};
-
-function d3_range_integerScale(x) {
- var k = 1;
- while (x * k % 1) k *= 10;
- return k;
-}
-function d3_class(ctor, properties) {
- for (var key in properties) {
- Object.defineProperty(ctor.prototype, key, {
- value: properties[key],
- enumerable: false
- });
- }
-}
+ /** Used to identify `toStringTag` values of typed arrays. */
+ var typedArrayTags = {};
+ typedArrayTags[float32Tag] = typedArrayTags[float64Tag] =
+ typedArrayTags[int8Tag] = typedArrayTags[int16Tag] =
+ typedArrayTags[int32Tag] = typedArrayTags[uint8Tag] =
+ typedArrayTags[uint8ClampedTag] = typedArrayTags[uint16Tag] =
+ typedArrayTags[uint32Tag] = true;
+ typedArrayTags[argsTag] = typedArrayTags[arrayTag] =
+ typedArrayTags[arrayBufferTag] = typedArrayTags[boolTag] =
+ typedArrayTags[dataViewTag] = typedArrayTags[dateTag] =
+ typedArrayTags[errorTag] = typedArrayTags[funcTag] =
+ typedArrayTags[mapTag] = typedArrayTags[numberTag] =
+ typedArrayTags[objectTag] = typedArrayTags[regexpTag] =
+ typedArrayTags[setTag] = typedArrayTags[stringTag] =
+ typedArrayTags[weakMapTag] = false;
-d3.map = function(object, f) {
- var map = new d3_Map;
- if (object instanceof d3_Map) {
- object.forEach(function(key, value) { map.set(key, value); });
- } else if (Array.isArray(object)) {
- var i = -1,
- n = object.length,
- o;
- if (arguments.length === 1) while (++i < n) map.set(i, object[i]);
- else while (++i < n) map.set(f.call(object, o = object[i], i), o);
- } else {
- for (var key in object) map.set(key, object[key]);
- }
- return map;
-};
+ /** Used to identify `toStringTag` values supported by `_.clone`. */
+ var cloneableTags = {};
+ cloneableTags[argsTag] = cloneableTags[arrayTag] =
+ cloneableTags[arrayBufferTag] = cloneableTags[dataViewTag] =
+ cloneableTags[boolTag] = cloneableTags[dateTag] =
+ cloneableTags[float32Tag] = cloneableTags[float64Tag] =
+ cloneableTags[int8Tag] = cloneableTags[int16Tag] =
+ cloneableTags[int32Tag] = cloneableTags[mapTag] =
+ cloneableTags[numberTag] = cloneableTags[objectTag] =
+ cloneableTags[regexpTag] = cloneableTags[setTag] =
+ cloneableTags[stringTag] = cloneableTags[symbolTag] =
+ cloneableTags[uint8Tag] = cloneableTags[uint8ClampedTag] =
+ cloneableTags[uint16Tag] = cloneableTags[uint32Tag] = true;
+ cloneableTags[errorTag] = cloneableTags[funcTag] =
+ cloneableTags[weakMapTag] = false;
-function d3_Map() {
- this._ = Object.create(null);
-}
+ /** Used to map Latin Unicode letters to basic Latin letters. */
+ var deburredLetters = {
+ // Latin-1 Supplement block.
+ '\xc0': 'A', '\xc1': 'A', '\xc2': 'A', '\xc3': 'A', '\xc4': 'A', '\xc5': 'A',
+ '\xe0': 'a', '\xe1': 'a', '\xe2': 'a', '\xe3': 'a', '\xe4': 'a', '\xe5': 'a',
+ '\xc7': 'C', '\xe7': 'c',
+ '\xd0': 'D', '\xf0': 'd',
+ '\xc8': 'E', '\xc9': 'E', '\xca': 'E', '\xcb': 'E',
+ '\xe8': 'e', '\xe9': 'e', '\xea': 'e', '\xeb': 'e',
+ '\xcc': 'I', '\xcd': 'I', '\xce': 'I', '\xcf': 'I',
+ '\xec': 'i', '\xed': 'i', '\xee': 'i', '\xef': 'i',
+ '\xd1': 'N', '\xf1': 'n',
+ '\xd2': 'O', '\xd3': 'O', '\xd4': 'O', '\xd5': 'O', '\xd6': 'O', '\xd8': 'O',
+ '\xf2': 'o', '\xf3': 'o', '\xf4': 'o', '\xf5': 'o', '\xf6': 'o', '\xf8': 'o',
+ '\xd9': 'U', '\xda': 'U', '\xdb': 'U', '\xdc': 'U',
+ '\xf9': 'u', '\xfa': 'u', '\xfb': 'u', '\xfc': 'u',
+ '\xdd': 'Y', '\xfd': 'y', '\xff': 'y',
+ '\xc6': 'Ae', '\xe6': 'ae',
+ '\xde': 'Th', '\xfe': 'th',
+ '\xdf': 'ss',
+ // Latin Extended-A block.
+ '\u0100': 'A', '\u0102': 'A', '\u0104': 'A',
+ '\u0101': 'a', '\u0103': 'a', '\u0105': 'a',
+ '\u0106': 'C', '\u0108': 'C', '\u010a': 'C', '\u010c': 'C',
+ '\u0107': 'c', '\u0109': 'c', '\u010b': 'c', '\u010d': 'c',
+ '\u010e': 'D', '\u0110': 'D', '\u010f': 'd', '\u0111': 'd',
+ '\u0112': 'E', '\u0114': 'E', '\u0116': 'E', '\u0118': 'E', '\u011a': 'E',
+ '\u0113': 'e', '\u0115': 'e', '\u0117': 'e', '\u0119': 'e', '\u011b': 'e',
+ '\u011c': 'G', '\u011e': 'G', '\u0120': 'G', '\u0122': 'G',
+ '\u011d': 'g', '\u011f': 'g', '\u0121': 'g', '\u0123': 'g',
+ '\u0124': 'H', '\u0126': 'H', '\u0125': 'h', '\u0127': 'h',
+ '\u0128': 'I', '\u012a': 'I', '\u012c': 'I', '\u012e': 'I', '\u0130': 'I',
+ '\u0129': 'i', '\u012b': 'i', '\u012d': 'i', '\u012f': 'i', '\u0131': 'i',
+ '\u0134': 'J', '\u0135': 'j',
+ '\u0136': 'K', '\u0137': 'k', '\u0138': 'k',
+ '\u0139': 'L', '\u013b': 'L', '\u013d': 'L', '\u013f': 'L', '\u0141': 'L',
+ '\u013a': 'l', '\u013c': 'l', '\u013e': 'l', '\u0140': 'l', '\u0142': 'l',
+ '\u0143': 'N', '\u0145': 'N', '\u0147': 'N', '\u014a': 'N',
+ '\u0144': 'n', '\u0146': 'n', '\u0148': 'n', '\u014b': 'n',
+ '\u014c': 'O', '\u014e': 'O', '\u0150': 'O',
+ '\u014d': 'o', '\u014f': 'o', '\u0151': 'o',
+ '\u0154': 'R', '\u0156': 'R', '\u0158': 'R',
+ '\u0155': 'r', '\u0157': 'r', '\u0159': 'r',
+ '\u015a': 'S', '\u015c': 'S', '\u015e': 'S', '\u0160': 'S',
+ '\u015b': 's', '\u015d': 's', '\u015f': 's', '\u0161': 's',
+ '\u0162': 'T', '\u0164': 'T', '\u0166': 'T',
+ '\u0163': 't', '\u0165': 't', '\u0167': 't',
+ '\u0168': 'U', '\u016a': 'U', '\u016c': 'U', '\u016e': 'U', '\u0170': 'U', '\u0172': 'U',
+ '\u0169': 'u', '\u016b': 'u', '\u016d': 'u', '\u016f': 'u', '\u0171': 'u', '\u0173': 'u',
+ '\u0174': 'W', '\u0175': 'w',
+ '\u0176': 'Y', '\u0177': 'y', '\u0178': 'Y',
+ '\u0179': 'Z', '\u017b': 'Z', '\u017d': 'Z',
+ '\u017a': 'z', '\u017c': 'z', '\u017e': 'z',
+ '\u0132': 'IJ', '\u0133': 'ij',
+ '\u0152': 'Oe', '\u0153': 'oe',
+ '\u0149': "'n", '\u017f': 's'
+ };
-var d3_map_proto = "__proto__",
- d3_map_zero = "\0";
+ /** Used to map characters to HTML entities. */
+ var htmlEscapes = {
+ '&': '&',
+ '<': '<',
+ '>': '>',
+ '"': '"',
+ "'": '''
+ };
-d3_class(d3_Map, {
- has: d3_map_has,
- get: function(key) {
- return this._[d3_map_escape(key)];
- },
- set: function(key, value) {
- return this._[d3_map_escape(key)] = value;
- },
- remove: d3_map_remove,
- keys: d3_map_keys,
- values: function() {
- var values = [];
- for (var key in this._) values.push(this._[key]);
- return values;
- },
- entries: function() {
- var entries = [];
- for (var key in this._) entries.push({key: d3_map_unescape(key), value: this._[key]});
- return entries;
- },
- size: d3_map_size,
- empty: d3_map_empty,
- forEach: function(f) {
- for (var key in this._) f.call(this, d3_map_unescape(key), this._[key]);
- }
-});
+ /** Used to map HTML entities to characters. */
+ var htmlUnescapes = {
+ '&': '&',
+ '<': '<',
+ '>': '>',
+ '"': '"',
+ ''': "'"
+ };
-function d3_map_escape(key) {
- return (key += "") === d3_map_proto || key[0] === d3_map_zero ? d3_map_zero + key : key;
-}
+ /** Used to escape characters for inclusion in compiled string literals. */
+ var stringEscapes = {
+ '\\': '\\',
+ "'": "'",
+ '\n': 'n',
+ '\r': 'r',
+ '\u2028': 'u2028',
+ '\u2029': 'u2029'
+ };
-function d3_map_unescape(key) {
- return (key += "")[0] === d3_map_zero ? key.slice(1) : key;
-}
+ /** Built-in method references without a dependency on `root`. */
+ var freeParseFloat = parseFloat,
+ freeParseInt = parseInt;
-function d3_map_has(key) {
- return d3_map_escape(key) in this._;
-}
+ /** Detect free variable `global` from Node.js. */
+ var freeGlobal = typeof commonjsGlobal == 'object' && commonjsGlobal && commonjsGlobal.Object === Object && commonjsGlobal;
-function d3_map_remove(key) {
- return (key = d3_map_escape(key)) in this._ && delete this._[key];
-}
+ /** Detect free variable `self`. */
+ var freeSelf = typeof self == 'object' && self && self.Object === Object && self;
-function d3_map_keys() {
- var keys = [];
- for (var key in this._) keys.push(d3_map_unescape(key));
- return keys;
-}
+ /** Used as a reference to the global object. */
+ var root = freeGlobal || freeSelf || Function('return this')();
-function d3_map_size() {
- var size = 0;
- for (var key in this._) ++size;
- return size;
-}
+ /** Detect free variable `exports`. */
+ var freeExports = 'object' == 'object' && exports && !exports.nodeType && exports;
-function d3_map_empty() {
- for (var key in this._) return false;
- return true;
-}
+ /** Detect free variable `module`. */
+ var freeModule = freeExports && 'object' == 'object' && module && !module.nodeType && module;
-d3.nest = function() {
- var nest = {},
- keys = [],
- sortKeys = [],
- sortValues,
- rollup;
+ /** Detect the popular CommonJS extension `module.exports`. */
+ var moduleExports = freeModule && freeModule.exports === freeExports;
- function map(mapType, array, depth) {
- if (depth >= keys.length) return rollup
- ? rollup.call(nest, array) : (sortValues
- ? array.sort(sortValues)
- : array);
+ /** Detect free variable `process` from Node.js. */
+ var freeProcess = moduleExports && freeGlobal.process;
- var i = -1,
- n = array.length,
- key = keys[depth++],
- keyValue,
- object,
- setter,
- valuesByKey = new d3_Map,
- values;
+ /** Used to access faster Node.js helpers. */
+ var nodeUtil = (function() {
+ try {
+ return freeProcess && freeProcess.binding && freeProcess.binding('util');
+ } catch (e) {}
+ }());
- while (++i < n) {
- if (values = valuesByKey.get(keyValue = key(object = array[i]))) {
- values.push(object);
- } else {
- valuesByKey.set(keyValue, [object]);
- }
- }
+ /* Node.js helper references. */
+ var nodeIsArrayBuffer = nodeUtil && nodeUtil.isArrayBuffer,
+ nodeIsDate = nodeUtil && nodeUtil.isDate,
+ nodeIsMap = nodeUtil && nodeUtil.isMap,
+ nodeIsRegExp = nodeUtil && nodeUtil.isRegExp,
+ nodeIsSet = nodeUtil && nodeUtil.isSet,
+ nodeIsTypedArray = nodeUtil && nodeUtil.isTypedArray;
- if (mapType) {
- object = mapType();
- setter = function(keyValue, values) {
- object.set(keyValue, map(mapType, values, depth));
- };
- } else {
- object = {};
- setter = function(keyValue, values) {
- object[keyValue] = map(mapType, values, depth);
- };
- }
+ /*--------------------------------------------------------------------------*/
- valuesByKey.forEach(setter);
- return object;
+ /**
+ * Adds the key-value `pair` to `map`.
+ *
+ * @private
+ * @param {Object} map The map to modify.
+ * @param {Array} pair The key-value pair to add.
+ * @returns {Object} Returns `map`.
+ */
+ function addMapEntry(map, pair) {
+ // Don't return `map.set` because it's not chainable in IE 11.
+ map.set(pair[0], pair[1]);
+ return map;
}
- function entries(map, depth) {
- if (depth >= keys.length) return map;
-
- var array = [],
- sortKey = sortKeys[depth++];
-
- map.forEach(function(key, keyMap) {
- array.push({key: key, values: entries(keyMap, depth)});
- });
-
- return sortKey
- ? array.sort(function(a, b) { return sortKey(a.key, b.key); })
- : array;
+ /**
+ * Adds `value` to `set`.
+ *
+ * @private
+ * @param {Object} set The set to modify.
+ * @param {*} value The value to add.
+ * @returns {Object} Returns `set`.
+ */
+ function addSetEntry(set, value) {
+ // Don't return `set.add` because it's not chainable in IE 11.
+ set.add(value);
+ return set;
}
- nest.map = function(array, mapType) {
- return map(mapType, array, 0);
- };
-
- nest.entries = function(array) {
- return entries(map(d3.map, array, 0), 0);
- };
-
- nest.key = function(d) {
- keys.push(d);
- return nest;
- };
-
- // Specifies the order for the most-recently specified key.
- // Note: only applies to entries. Map keys are unordered!
- nest.sortKeys = function(order) {
- sortKeys[keys.length - 1] = order;
- return nest;
- };
-
- // Specifies the order for leaf values.
- // Applies to both maps and entries array.
- nest.sortValues = function(order) {
- sortValues = order;
- return nest;
- };
-
- nest.rollup = function(f) {
- rollup = f;
- return nest;
- };
-
- return nest;
-};
-
-d3.set = function(array) {
- var set = new d3_Set;
- if (array) for (var i = 0, n = array.length; i < n; ++i) set.add(array[i]);
- return set;
-};
-
-function d3_Set() {
- this._ = Object.create(null);
-}
-
-d3_class(d3_Set, {
- has: d3_map_has,
- add: function(key) {
- this._[d3_map_escape(key += "")] = true;
- return key;
- },
- remove: d3_map_remove,
- values: d3_map_keys,
- size: d3_map_size,
- empty: d3_map_empty,
- forEach: function(f) {
- for (var key in this._) f.call(this, d3_map_unescape(key));
+ /**
+ * A faster alternative to `Function#apply`, this function invokes `func`
+ * with the `this` binding of `thisArg` and the arguments of `args`.
+ *
+ * @private
+ * @param {Function} func The function to invoke.
+ * @param {*} thisArg The `this` binding of `func`.
+ * @param {Array} args The arguments to invoke `func` with.
+ * @returns {*} Returns the result of `func`.
+ */
+ function apply(func, thisArg, args) {
+ switch (args.length) {
+ case 0: return func.call(thisArg);
+ case 1: return func.call(thisArg, args[0]);
+ case 2: return func.call(thisArg, args[0], args[1]);
+ case 3: return func.call(thisArg, args[0], args[1], args[2]);
+ }
+ return func.apply(thisArg, args);
}
-});
-d3.behavior = {};
-var d3_document = this.document;
-
-function d3_documentElement(node) {
- return node
- && (node.ownerDocument // node is a Node
- || node.document // node is a Window
- || node).documentElement; // node is a Document
-}
-function d3_window(node) {
- return node
- && ((node.ownerDocument && node.ownerDocument.defaultView) // node is a Node
- || (node.document && node) // node is a Window
- || node.defaultView); // node is a Document
-}
-// Copies a variable number of methods from source to target.
-d3.rebind = function(target, source) {
- var i = 1, n = arguments.length, method;
- while (++i < n) target[method = arguments[i]] = d3_rebind(target, source, source[method]);
- return target;
-};
+ /**
+ * A specialized version of `baseAggregator` for arrays.
+ *
+ * @private
+ * @param {Array} [array] The array to iterate over.
+ * @param {Function} setter The function to set `accumulator` values.
+ * @param {Function} iteratee The iteratee to transform keys.
+ * @param {Object} accumulator The initial aggregated object.
+ * @returns {Function} Returns `accumulator`.
+ */
+ function arrayAggregator(array, setter, iteratee, accumulator) {
+ var index = -1,
+ length = array == null ? 0 : array.length;
-// Method is assumed to be a standard D3 getter-setter:
-// If passed with no arguments, gets the value.
-// If passed with arguments, sets the value and returns the target.
-function d3_rebind(target, source, method) {
- return function() {
- var value = method.apply(source, arguments);
- return value === source ? target : value;
- };
-}
-function d3_vendorSymbol(object, name) {
- if (name in object) return name;
- name = name.charAt(0).toUpperCase() + name.slice(1);
- for (var i = 0, n = d3_vendorPrefixes.length; i < n; ++i) {
- var prefixName = d3_vendorPrefixes[i] + name;
- if (prefixName in object) return prefixName;
+ while (++index < length) {
+ var value = array[index];
+ setter(accumulator, value, iteratee(value), array);
+ }
+ return accumulator;
}
-}
-
-var d3_vendorPrefixes = ["webkit", "ms", "moz", "Moz", "o", "O"];
-var d3_arraySlice = [].slice,
- d3_array = function(list) { return d3_arraySlice.call(list); }; // conversion for NodeLists
-function d3_noop() {}
-d3.dispatch = function() {
- var dispatch = new d3_dispatch,
- i = -1,
- n = arguments.length;
- while (++i < n) dispatch[arguments[i]] = d3_dispatch_event(dispatch);
- return dispatch;
-};
+ /**
+ * A specialized version of `_.forEach` for arrays without support for
+ * iteratee shorthands.
+ *
+ * @private
+ * @param {Array} [array] The array to iterate over.
+ * @param {Function} iteratee The function invoked per iteration.
+ * @returns {Array} Returns `array`.
+ */
+ function arrayEach(array, iteratee) {
+ var index = -1,
+ length = array == null ? 0 : array.length;
-function d3_dispatch() {}
+ while (++index < length) {
+ if (iteratee(array[index], index, array) === false) {
+ break;
+ }
+ }
+ return array;
+ }
-d3_dispatch.prototype.on = function(type, listener) {
- var i = type.indexOf("."),
- name = "";
+ /**
+ * A specialized version of `_.forEachRight` for arrays without support for
+ * iteratee shorthands.
+ *
+ * @private
+ * @param {Array} [array] The array to iterate over.
+ * @param {Function} iteratee The function invoked per iteration.
+ * @returns {Array} Returns `array`.
+ */
+ function arrayEachRight(array, iteratee) {
+ var length = array == null ? 0 : array.length;
- // Extract optional namespace, e.g., "click.foo"
- if (i >= 0) {
- name = type.slice(i + 1);
- type = type.slice(0, i);
+ while (length--) {
+ if (iteratee(array[length], length, array) === false) {
+ break;
+ }
+ }
+ return array;
}
- if (type) return arguments.length < 2
- ? this[type].on(name)
- : this[type].on(name, listener);
+ /**
+ * A specialized version of `_.every` for arrays without support for
+ * iteratee shorthands.
+ *
+ * @private
+ * @param {Array} [array] The array to iterate over.
+ * @param {Function} predicate The function invoked per iteration.
+ * @returns {boolean} Returns `true` if all elements pass the predicate check,
+ * else `false`.
+ */
+ function arrayEvery(array, predicate) {
+ var index = -1,
+ length = array == null ? 0 : array.length;
- if (arguments.length === 2) {
- if (listener == null) for (type in this) {
- if (this.hasOwnProperty(type)) this[type].on(name, null);
+ while (++index < length) {
+ if (!predicate(array[index], index, array)) {
+ return false;
+ }
}
- return this;
+ return true;
}
-};
-function d3_dispatch_event(dispatch) {
- var listeners = [],
- listenerByName = new d3_Map;
+ /**
+ * A specialized version of `_.filter` for arrays without support for
+ * iteratee shorthands.
+ *
+ * @private
+ * @param {Array} [array] The array to iterate over.
+ * @param {Function} predicate The function invoked per iteration.
+ * @returns {Array} Returns the new filtered array.
+ */
+ function arrayFilter(array, predicate) {
+ var index = -1,
+ length = array == null ? 0 : array.length,
+ resIndex = 0,
+ result = [];
- function event() {
- var z = listeners, // defensive reference
- i = -1,
- n = z.length,
- l;
- while (++i < n) if (l = z[i].on) l.apply(this, arguments);
- return dispatch;
+ while (++index < length) {
+ var value = array[index];
+ if (predicate(value, index, array)) {
+ result[resIndex++] = value;
+ }
+ }
+ return result;
}
- event.on = function(name, listener) {
- var l = listenerByName.get(name),
- i;
+ /**
+ * A specialized version of `_.includes` for arrays without support for
+ * specifying an index to search from.
+ *
+ * @private
+ * @param {Array} [array] The array to inspect.
+ * @param {*} target The value to search for.
+ * @returns {boolean} Returns `true` if `target` is found, else `false`.
+ */
+ function arrayIncludes(array, value) {
+ var length = array == null ? 0 : array.length;
+ return !!length && baseIndexOf(array, value, 0) > -1;
+ }
- // return the current listener, if any
- if (arguments.length < 2) return l && l.on;
+ /**
+ * This function is like `arrayIncludes` except that it accepts a comparator.
+ *
+ * @private
+ * @param {Array} [array] The array to inspect.
+ * @param {*} target The value to search for.
+ * @param {Function} comparator The comparator invoked per element.
+ * @returns {boolean} Returns `true` if `target` is found, else `false`.
+ */
+ function arrayIncludesWith(array, value, comparator) {
+ var index = -1,
+ length = array == null ? 0 : array.length;
- // remove the old listener, if any (with copy-on-write)
- if (l) {
- l.on = null;
- listeners = listeners.slice(0, i = listeners.indexOf(l)).concat(listeners.slice(i + 1));
- listenerByName.remove(name);
+ while (++index < length) {
+ if (comparator(value, array[index])) {
+ return true;
+ }
}
+ return false;
+ }
- // add the new listener, if any
- if (listener) listeners.push(listenerByName.set(name, {on: listener}));
-
- return dispatch;
- };
+ /**
+ * A specialized version of `_.map` for arrays without support for iteratee
+ * shorthands.
+ *
+ * @private
+ * @param {Array} [array] The array to iterate over.
+ * @param {Function} iteratee The function invoked per iteration.
+ * @returns {Array} Returns the new mapped array.
+ */
+ function arrayMap(array, iteratee) {
+ var index = -1,
+ length = array == null ? 0 : array.length,
+ result = Array(length);
- return event;
-}
+ while (++index < length) {
+ result[index] = iteratee(array[index], index, array);
+ }
+ return result;
+ }
-d3.event = null;
-
-function d3_eventPreventDefault() {
- d3.event.preventDefault();
-}
-
-function d3_eventCancel() {
- d3.event.preventDefault();
- d3.event.stopPropagation();
-}
-
-function d3_eventSource() {
- var e = d3.event, s;
- while (s = e.sourceEvent) e = s;
- return e;
-}
-
-// Like d3.dispatch, but for custom events abstracting native UI events. These
-// events have a target component (such as a brush), a target element (such as
-// the svg:g element containing the brush) and the standard arguments `d` (the
-// target element's data) and `i` (the selection index of the target element).
-function d3_eventDispatch(target) {
- var dispatch = new d3_dispatch,
- i = 0,
- n = arguments.length;
-
- while (++i < n) dispatch[arguments[i]] = d3_dispatch_event(dispatch);
-
- // Creates a dispatch context for the specified `thiz` (typically, the target
- // DOM element that received the source event) and `argumentz` (typically, the
- // data `d` and index `i` of the target element). The returned function can be
- // used to dispatch an event to any registered listeners; the function takes a
- // single argument as input, being the event to dispatch. The event must have
- // a "type" attribute which corresponds to a type registered in the
- // constructor. This context will automatically populate the "sourceEvent" and
- // "target" attributes of the event, as well as setting the `d3.event` global
- // for the duration of the notification.
- dispatch.of = function(thiz, argumentz) {
- return function(e1) {
- try {
- var e0 =
- e1.sourceEvent = d3.event;
- e1.target = target;
- d3.event = e1;
- dispatch[e1.type].apply(thiz, argumentz);
- } finally {
- d3.event = e0;
- }
- };
- };
-
- return dispatch;
-}
-d3.requote = function(s) {
- return s.replace(d3_requote_re, "\\$&");
-};
-
-var d3_requote_re = /[\\\^\$\*\+\?\|\[\]\(\)\.\{\}]/g;
-var d3_subclass = {}.__proto__?
-
-// Until ECMAScript supports array subclassing, prototype injection works well.
-function(object, prototype) {
- object.__proto__ = prototype;
-}:
-
-// And if your browser doesn't support __proto__, we'll use direct extension.
-function(object, prototype) {
- for (var property in prototype) object[property] = prototype[property];
-};
-
-function d3_selection(groups) {
- d3_subclass(groups, d3_selectionPrototype);
- return groups;
-}
-
-var d3_select = function(s, n) { return n.querySelector(s); },
- d3_selectAll = function(s, n) { return n.querySelectorAll(s); },
- d3_selectMatches = function(n, s) {
- var d3_selectMatcher = n.matches || n[d3_vendorSymbol(n, "matchesSelector")];
- d3_selectMatches = function(n, s) {
- return d3_selectMatcher.call(n, s);
- };
- return d3_selectMatches(n, s);
- };
-
-// Prefer Sizzle, if available.
-if (typeof Sizzle === "function") {
- d3_select = function(s, n) { return Sizzle(s, n)[0] || null; };
- d3_selectAll = Sizzle;
- d3_selectMatches = Sizzle.matchesSelector;
-}
-
-d3.selection = function() {
- return d3.select(d3_document.documentElement);
-};
-
-var d3_selectionPrototype = d3.selection.prototype = [];
-
-
-d3_selectionPrototype.select = function(selector) {
- var subgroups = [],
- subgroup,
- subnode,
- group,
- node;
-
- selector = d3_selection_selector(selector);
+ /**
+ * Appends the elements of `values` to `array`.
+ *
+ * @private
+ * @param {Array} array The array to modify.
+ * @param {Array} values The values to append.
+ * @returns {Array} Returns `array`.
+ */
+ function arrayPush(array, values) {
+ var index = -1,
+ length = values.length,
+ offset = array.length;
- for (var j = -1, m = this.length; ++j < m;) {
- subgroups.push(subgroup = []);
- subgroup.parentNode = (group = this[j]).parentNode;
- for (var i = -1, n = group.length; ++i < n;) {
- if (node = group[i]) {
- subgroup.push(subnode = selector.call(node, node.__data__, i, j));
- if (subnode && "__data__" in node) subnode.__data__ = node.__data__;
- } else {
- subgroup.push(null);
- }
+ while (++index < length) {
+ array[offset + index] = values[index];
}
+ return array;
}
- return d3_selection(subgroups);
-};
-
-function d3_selection_selector(selector) {
- return typeof selector === "function" ? selector : function() {
- return d3_select(selector, this);
- };
-}
-
-d3_selectionPrototype.selectAll = function(selector) {
- var subgroups = [],
- subgroup,
- node;
-
- selector = d3_selection_selectorAll(selector);
+ /**
+ * A specialized version of `_.reduce` for arrays without support for
+ * iteratee shorthands.
+ *
+ * @private
+ * @param {Array} [array] The array to iterate over.
+ * @param {Function} iteratee The function invoked per iteration.
+ * @param {*} [accumulator] The initial value.
+ * @param {boolean} [initAccum] Specify using the first element of `array` as
+ * the initial value.
+ * @returns {*} Returns the accumulated value.
+ */
+ function arrayReduce(array, iteratee, accumulator, initAccum) {
+ var index = -1,
+ length = array == null ? 0 : array.length;
- for (var j = -1, m = this.length; ++j < m;) {
- for (var group = this[j], i = -1, n = group.length; ++i < n;) {
- if (node = group[i]) {
- subgroups.push(subgroup = d3_array(selector.call(node, node.__data__, i, j)));
- subgroup.parentNode = node;
- }
+ if (initAccum && length) {
+ accumulator = array[++index];
+ }
+ while (++index < length) {
+ accumulator = iteratee(accumulator, array[index], index, array);
}
+ return accumulator;
}
- return d3_selection(subgroups);
-};
-
-function d3_selection_selectorAll(selector) {
- return typeof selector === "function" ? selector : function() {
- return d3_selectAll(selector, this);
- };
-}
-var d3_nsPrefix = {
- svg: "http://www.w3.org/2000/svg",
- xhtml: "http://www.w3.org/1999/xhtml",
- xlink: "http://www.w3.org/1999/xlink",
- xml: "http://www.w3.org/XML/1998/namespace",
- xmlns: "http://www.w3.org/2000/xmlns/"
-};
-
-d3.ns = {
- prefix: d3_nsPrefix,
- qualify: function(name) {
- var i = name.indexOf(":"),
- prefix = name;
- if (i >= 0) {
- prefix = name.slice(0, i);
- name = name.slice(i + 1);
+ /**
+ * A specialized version of `_.reduceRight` for arrays without support for
+ * iteratee shorthands.
+ *
+ * @private
+ * @param {Array} [array] The array to iterate over.
+ * @param {Function} iteratee The function invoked per iteration.
+ * @param {*} [accumulator] The initial value.
+ * @param {boolean} [initAccum] Specify using the last element of `array` as
+ * the initial value.
+ * @returns {*} Returns the accumulated value.
+ */
+ function arrayReduceRight(array, iteratee, accumulator, initAccum) {
+ var length = array == null ? 0 : array.length;
+ if (initAccum && length) {
+ accumulator = array[--length];
+ }
+ while (length--) {
+ accumulator = iteratee(accumulator, array[length], length, array);
}
- return d3_nsPrefix.hasOwnProperty(prefix)
- ? {space: d3_nsPrefix[prefix], local: name}
- : name;
+ return accumulator;
}
-};
-d3_selectionPrototype.attr = function(name, value) {
- if (arguments.length < 2) {
+ /**
+ * A specialized version of `_.some` for arrays without support for iteratee
+ * shorthands.
+ *
+ * @private
+ * @param {Array} [array] The array to iterate over.
+ * @param {Function} predicate The function invoked per iteration.
+ * @returns {boolean} Returns `true` if any element passes the predicate check,
+ * else `false`.
+ */
+ function arraySome(array, predicate) {
+ var index = -1,
+ length = array == null ? 0 : array.length;
- // For attr(string), return the attribute value for the first node.
- if (typeof name === "string") {
- var node = this.node();
- name = d3.ns.qualify(name);
- return name.local
- ? node.getAttributeNS(name.space, name.local)
- : node.getAttribute(name);
+ while (++index < length) {
+ if (predicate(array[index], index, array)) {
+ return true;
+ }
}
-
- // For attr(object), the object specifies the names and values of the
- // attributes to set or remove. The values may be functions that are
- // evaluated for each element.
- for (value in name) this.each(d3_selection_attr(value, name[value]));
- return this;
+ return false;
}
- return this.each(d3_selection_attr(name, value));
-};
-
-function d3_selection_attr(name, value) {
- name = d3.ns.qualify(name);
+ /**
+ * Gets the size of an ASCII `string`.
+ *
+ * @private
+ * @param {string} string The string inspect.
+ * @returns {number} Returns the string size.
+ */
+ var asciiSize = baseProperty('length');
- // For attr(string, null), remove the attribute with the specified name.
- function attrNull() {
- this.removeAttribute(name);
- }
- function attrNullNS() {
- this.removeAttributeNS(name.space, name.local);
+ /**
+ * Converts an ASCII `string` to an array.
+ *
+ * @private
+ * @param {string} string The string to convert.
+ * @returns {Array} Returns the converted array.
+ */
+ function asciiToArray(string) {
+ return string.split('');
}
- // For attr(string, string), set the attribute with the specified name.
- function attrConstant() {
- this.setAttribute(name, value);
- }
- function attrConstantNS() {
- this.setAttributeNS(name.space, name.local, value);
+ /**
+ * Splits an ASCII `string` into an array of its words.
+ *
+ * @private
+ * @param {string} The string to inspect.
+ * @returns {Array} Returns the words of `string`.
+ */
+ function asciiWords(string) {
+ return string.match(reAsciiWord) || [];
}
- // For attr(string, function), evaluate the function for each element, and set
- // or remove the attribute as appropriate.
- function attrFunction() {
- var x = value.apply(this, arguments);
- if (x == null) this.removeAttribute(name);
- else this.setAttribute(name, x);
- }
- function attrFunctionNS() {
- var x = value.apply(this, arguments);
- if (x == null) this.removeAttributeNS(name.space, name.local);
- else this.setAttributeNS(name.space, name.local, x);
+ /**
+ * The base implementation of methods like `_.findKey` and `_.findLastKey`,
+ * without support for iteratee shorthands, which iterates over `collection`
+ * using `eachFunc`.
+ *
+ * @private
+ * @param {Array|Object} collection The collection to inspect.
+ * @param {Function} predicate The function invoked per iteration.
+ * @param {Function} eachFunc The function to iterate over `collection`.
+ * @returns {*} Returns the found element or its key, else `undefined`.
+ */
+ function baseFindKey(collection, predicate, eachFunc) {
+ var result;
+ eachFunc(collection, function(value, key, collection) {
+ if (predicate(value, key, collection)) {
+ result = key;
+ return false;
+ }
+ });
+ return result;
}
- return value == null
- ? (name.local ? attrNullNS : attrNull) : (typeof value === "function"
- ? (name.local ? attrFunctionNS : attrFunction)
- : (name.local ? attrConstantNS : attrConstant));
-}
-function d3_collapse(s) {
- return s.trim().replace(/\s+/g, " ");
-}
-
-d3_selectionPrototype.classed = function(name, value) {
- if (arguments.length < 2) {
+ /**
+ * The base implementation of `_.findIndex` and `_.findLastIndex` without
+ * support for iteratee shorthands.
+ *
+ * @private
+ * @param {Array} array The array to inspect.
+ * @param {Function} predicate The function invoked per iteration.
+ * @param {number} fromIndex The index to search from.
+ * @param {boolean} [fromRight] Specify iterating from right to left.
+ * @returns {number} Returns the index of the matched value, else `-1`.
+ */
+ function baseFindIndex(array, predicate, fromIndex, fromRight) {
+ var length = array.length,
+ index = fromIndex + (fromRight ? 1 : -1);
- // For classed(string), return true only if the first node has the specified
- // class or classes. Note that even if the browser supports DOMTokenList, it
- // probably doesn't support it on SVG elements (which can be animated).
- if (typeof name === "string") {
- var node = this.node(),
- n = (name = d3_selection_classes(name)).length,
- i = -1;
- if (value = node.classList) {
- while (++i < n) if (!value.contains(name[i])) return false;
- } else {
- value = node.getAttribute("class");
- while (++i < n) if (!d3_selection_classedRe(name[i]).test(value)) return false;
+ while ((fromRight ? index-- : ++index < length)) {
+ if (predicate(array[index], index, array)) {
+ return index;
}
- return true;
}
-
- // For classed(object), the object specifies the names of classes to add or
- // remove. The values may be functions that are evaluated for each element.
- for (value in name) this.each(d3_selection_classed(value, name[value]));
- return this;
- }
-
- // Otherwise, both a name and a value are specified, and are handled as below.
- return this.each(d3_selection_classed(name, value));
-};
-
-function d3_selection_classedRe(name) {
- return new RegExp("(?:^|\\s+)" + d3.requote(name) + "(?:\\s+|$)", "g");
-}
-
-function d3_selection_classes(name) {
- return (name + "").trim().split(/^|\s+/);
-}
-
-// Multiple class names are allowed (e.g., "foo bar").
-function d3_selection_classed(name, value) {
- name = d3_selection_classes(name).map(d3_selection_classedName);
- var n = name.length;
-
- function classedConstant() {
- var i = -1;
- while (++i < n) name[i](this, value);
+ return -1;
}
- // When the value is a function, the function is still evaluated only once per
- // element even if there are multiple class names.
- function classedFunction() {
- var i = -1, x = value.apply(this, arguments);
- while (++i < n) name[i](this, x);
+ /**
+ * The base implementation of `_.indexOf` without `fromIndex` bounds checks.
+ *
+ * @private
+ * @param {Array} array The array to inspect.
+ * @param {*} value The value to search for.
+ * @param {number} fromIndex The index to search from.
+ * @returns {number} Returns the index of the matched value, else `-1`.
+ */
+ function baseIndexOf(array, value, fromIndex) {
+ return value === value
+ ? strictIndexOf(array, value, fromIndex)
+ : baseFindIndex(array, baseIsNaN, fromIndex);
}
- return typeof value === "function"
- ? classedFunction
- : classedConstant;
-}
-
-function d3_selection_classedName(name) {
- var re = d3_selection_classedRe(name);
- return function(node, value) {
- if (c = node.classList) return value ? c.add(name) : c.remove(name);
- var c = node.getAttribute("class") || "";
- if (value) {
- re.lastIndex = 0;
- if (!re.test(c)) node.setAttribute("class", d3_collapse(c + " " + name));
- } else {
- node.setAttribute("class", d3_collapse(c.replace(re, " ")));
- }
- };
-}
-
-d3_selectionPrototype.style = function(name, value, priority) {
- var n = arguments.length;
- if (n < 3) {
-
- // For style(object) or style(object, string), the object specifies the
- // names and values of the attributes to set or remove. The values may be
- // functions that are evaluated for each element. The optional string
- // specifies the priority.
- if (typeof name !== "string") {
- if (n < 2) value = "";
- for (priority in name) this.each(d3_selection_style(priority, name[priority], value));
- return this;
- }
+ /**
+ * This function is like `baseIndexOf` except that it accepts a comparator.
+ *
+ * @private
+ * @param {Array} array The array to inspect.
+ * @param {*} value The value to search for.
+ * @param {number} fromIndex The index to search from.
+ * @param {Function} comparator The comparator invoked per element.
+ * @returns {number} Returns the index of the matched value, else `-1`.
+ */
+ function baseIndexOfWith(array, value, fromIndex, comparator) {
+ var index = fromIndex - 1,
+ length = array.length;
- // For style(string), return the computed style value for the first node.
- if (n < 2) {
- var node = this.node();
- return d3_window(node).getComputedStyle(node, null).getPropertyValue(name);
+ while (++index < length) {
+ if (comparator(array[index], value)) {
+ return index;
+ }
}
-
- // For style(string, string) or style(string, function), use the default
- // priority. The priority is ignored for style(string, null).
- priority = "";
+ return -1;
}
- // Otherwise, a name, value and priority are specified, and handled as below.
- return this.each(d3_selection_style(name, value, priority));
-};
-
-function d3_selection_style(name, value, priority) {
-
- // For style(name, null) or style(name, null, priority), remove the style
- // property with the specified name. The priority is ignored.
- function styleNull() {
- this.style.removeProperty(name);
+ /**
+ * The base implementation of `_.isNaN` without support for number objects.
+ *
+ * @private
+ * @param {*} value The value to check.
+ * @returns {boolean} Returns `true` if `value` is `NaN`, else `false`.
+ */
+ function baseIsNaN(value) {
+ return value !== value;
}
- // For style(name, string) or style(name, string, priority), set the style
- // property with the specified name, using the specified priority.
- function styleConstant() {
- this.style.setProperty(name, value, priority);
+ /**
+ * The base implementation of `_.mean` and `_.meanBy` without support for
+ * iteratee shorthands.
+ *
+ * @private
+ * @param {Array} array The array to iterate over.
+ * @param {Function} iteratee The function invoked per iteration.
+ * @returns {number} Returns the mean.
+ */
+ function baseMean(array, iteratee) {
+ var length = array == null ? 0 : array.length;
+ return length ? (baseSum(array, iteratee) / length) : NAN;
}
- // For style(name, function) or style(name, function, priority), evaluate the
- // function for each element, and set or remove the style property as
- // appropriate. When setting, use the specified priority.
- function styleFunction() {
- var x = value.apply(this, arguments);
- if (x == null) this.style.removeProperty(name);
- else this.style.setProperty(name, x, priority);
+ /**
+ * The base implementation of `_.property` without support for deep paths.
+ *
+ * @private
+ * @param {string} key The key of the property to get.
+ * @returns {Function} Returns the new accessor function.
+ */
+ function baseProperty(key) {
+ return function(object) {
+ return object == null ? undefined : object[key];
+ };
}
- return value == null
- ? styleNull : (typeof value === "function"
- ? styleFunction : styleConstant);
-}
-
-d3_selectionPrototype.property = function(name, value) {
- if (arguments.length < 2) {
-
- // For property(string), return the property value for the first node.
- if (typeof name === "string") return this.node()[name];
-
- // For property(object), the object specifies the names and values of the
- // properties to set or remove. The values may be functions that are
- // evaluated for each element.
- for (value in name) this.each(d3_selection_property(value, name[value]));
- return this;
+ /**
+ * The base implementation of `_.propertyOf` without support for deep paths.
+ *
+ * @private
+ * @param {Object} object The object to query.
+ * @returns {Function} Returns the new accessor function.
+ */
+ function basePropertyOf(object) {
+ return function(key) {
+ return object == null ? undefined : object[key];
+ };
}
- // Otherwise, both a name and a value are specified, and are handled as below.
- return this.each(d3_selection_property(name, value));
-};
-
-function d3_selection_property(name, value) {
+ /**
+ * The base implementation of `_.reduce` and `_.reduceRight`, without support
+ * for iteratee shorthands, which iterates over `collection` using `eachFunc`.
+ *
+ * @private
+ * @param {Array|Object} collection The collection to iterate over.
+ * @param {Function} iteratee The function invoked per iteration.
+ * @param {*} accumulator The initial value.
+ * @param {boolean} initAccum Specify using the first or last element of
+ * `collection` as the initial value.
+ * @param {Function} eachFunc The function to iterate over `collection`.
+ * @returns {*} Returns the accumulated value.
+ */
+ function baseReduce(collection, iteratee, accumulator, initAccum, eachFunc) {
+ eachFunc(collection, function(value, index, collection) {
+ accumulator = initAccum
+ ? (initAccum = false, value)
+ : iteratee(accumulator, value, index, collection);
+ });
+ return accumulator;
+ }
- // For property(name, null), remove the property with the specified name.
- function propertyNull() {
- delete this[name];
- }
+ /**
+ * The base implementation of `_.sortBy` which uses `comparer` to define the
+ * sort order of `array` and replaces criteria objects with their corresponding
+ * values.
+ *
+ * @private
+ * @param {Array} array The array to sort.
+ * @param {Function} comparer The function to define sort order.
+ * @returns {Array} Returns `array`.
+ */
+ function baseSortBy(array, comparer) {
+ var length = array.length;
- // For property(name, string), set the property with the specified name.
- function propertyConstant() {
- this[name] = value;
+ array.sort(comparer);
+ while (length--) {
+ array[length] = array[length].value;
+ }
+ return array;
}
- // For property(name, function), evaluate the function for each element, and
- // set or remove the property as appropriate.
- function propertyFunction() {
- var x = value.apply(this, arguments);
- if (x == null) delete this[name];
- else this[name] = x;
- }
+ /**
+ * The base implementation of `_.sum` and `_.sumBy` without support for
+ * iteratee shorthands.
+ *
+ * @private
+ * @param {Array} array The array to iterate over.
+ * @param {Function} iteratee The function invoked per iteration.
+ * @returns {number} Returns the sum.
+ */
+ function baseSum(array, iteratee) {
+ var result,
+ index = -1,
+ length = array.length;
- return value == null
- ? propertyNull : (typeof value === "function"
- ? propertyFunction : propertyConstant);
-}
+ while (++index < length) {
+ var current = iteratee(array[index]);
+ if (current !== undefined) {
+ result = result === undefined ? current : (result + current);
+ }
+ }
+ return result;
+ }
-d3_selectionPrototype.text = function(value) {
- return arguments.length
- ? this.each(typeof value === "function"
- ? function() { var v = value.apply(this, arguments); this.textContent = v == null ? "" : v; } : value == null
- ? function() { if (this.textContent !== "") this.textContent = ""; }
- : function() { if (this.textContent !== value) this.textContent = value; })
- : this.node().textContent;
-};
+ /**
+ * The base implementation of `_.times` without support for iteratee shorthands
+ * or max array length checks.
+ *
+ * @private
+ * @param {number} n The number of times to invoke `iteratee`.
+ * @param {Function} iteratee The function invoked per iteration.
+ * @returns {Array} Returns the array of results.
+ */
+ function baseTimes(n, iteratee) {
+ var index = -1,
+ result = Array(n);
-d3_selectionPrototype.html = function(value) {
- return arguments.length
- ? this.each(typeof value === "function"
- ? function() { var v = value.apply(this, arguments); this.innerHTML = v == null ? "" : v; } : value == null
- ? function() { this.innerHTML = ""; }
- : function() { this.innerHTML = value; })
- : this.node().innerHTML;
-};
+ while (++index < n) {
+ result[index] = iteratee(index);
+ }
+ return result;
+ }
-d3_selectionPrototype.append = function(name) {
- name = d3_selection_creator(name);
- return this.select(function() {
- return this.appendChild(name.apply(this, arguments));
- });
-};
+ /**
+ * The base implementation of `_.toPairs` and `_.toPairsIn` which creates an array
+ * of key-value pairs for `object` corresponding to the property names of `props`.
+ *
+ * @private
+ * @param {Object} object The object to query.
+ * @param {Array} props The property names to get values for.
+ * @returns {Object} Returns the key-value pairs.
+ */
+ function baseToPairs(object, props) {
+ return arrayMap(props, function(key) {
+ return [key, object[key]];
+ });
+ }
-function d3_selection_creator(name) {
+ /**
+ * The base implementation of `_.unary` without support for storing metadata.
+ *
+ * @private
+ * @param {Function} func The function to cap arguments for.
+ * @returns {Function} Returns the new capped function.
+ */
+ function baseUnary(func) {
+ return function(value) {
+ return func(value);
+ };
+ }
- function create() {
- var document = this.ownerDocument,
- namespace = this.namespaceURI;
- return namespace
- ? document.createElementNS(namespace, name)
- : document.createElement(name);
+ /**
+ * The base implementation of `_.values` and `_.valuesIn` which creates an
+ * array of `object` property values corresponding to the property names
+ * of `props`.
+ *
+ * @private
+ * @param {Object} object The object to query.
+ * @param {Array} props The property names to get values for.
+ * @returns {Object} Returns the array of property values.
+ */
+ function baseValues(object, props) {
+ return arrayMap(props, function(key) {
+ return object[key];
+ });
}
- function createNS() {
- return this.ownerDocument.createElementNS(name.space, name.local);
+ /**
+ * Checks if a `cache` value for `key` exists.
+ *
+ * @private
+ * @param {Object} cache The cache to query.
+ * @param {string} key The key of the entry to check.
+ * @returns {boolean} Returns `true` if an entry for `key` exists, else `false`.
+ */
+ function cacheHas(cache, key) {
+ return cache.has(key);
}
- return typeof name === "function" ? name
- : (name = d3.ns.qualify(name)).local ? createNS
- : create;
-}
+ /**
+ * Used by `_.trim` and `_.trimStart` to get the index of the first string symbol
+ * that is not found in the character symbols.
+ *
+ * @private
+ * @param {Array} strSymbols The string symbols to inspect.
+ * @param {Array} chrSymbols The character symbols to find.
+ * @returns {number} Returns the index of the first unmatched string symbol.
+ */
+ function charsStartIndex(strSymbols, chrSymbols) {
+ var index = -1,
+ length = strSymbols.length;
-d3_selectionPrototype.insert = function(name, before) {
- name = d3_selection_creator(name);
- before = d3_selection_selector(before);
- return this.select(function() {
- return this.insertBefore(name.apply(this, arguments), before.apply(this, arguments) || null);
- });
-};
+ while (++index < length && baseIndexOf(chrSymbols, strSymbols[index], 0) > -1) {}
+ return index;
+ }
-// TODO remove(selector)?
-// TODO remove(node)?
-// TODO remove(function)?
-d3_selectionPrototype.remove = function() {
- return this.each(d3_selectionRemove);
-};
+ /**
+ * Used by `_.trim` and `_.trimEnd` to get the index of the last string symbol
+ * that is not found in the character symbols.
+ *
+ * @private
+ * @param {Array} strSymbols The string symbols to inspect.
+ * @param {Array} chrSymbols The character symbols to find.
+ * @returns {number} Returns the index of the last unmatched string symbol.
+ */
+ function charsEndIndex(strSymbols, chrSymbols) {
+ var index = strSymbols.length;
-function d3_selectionRemove() {
- var parent = this.parentNode;
- if (parent) parent.removeChild(this);
-}
+ while (index-- && baseIndexOf(chrSymbols, strSymbols[index], 0) > -1) {}
+ return index;
+ }
-d3_selectionPrototype.data = function(value, key) {
- var i = -1,
- n = this.length,
- group,
- node;
+ /**
+ * Gets the number of `placeholder` occurrences in `array`.
+ *
+ * @private
+ * @param {Array} array The array to inspect.
+ * @param {*} placeholder The placeholder to search for.
+ * @returns {number} Returns the placeholder count.
+ */
+ function countHolders(array, placeholder) {
+ var length = array.length,
+ result = 0;
- // If no value is specified, return the first value.
- if (!arguments.length) {
- value = new Array(n = (group = this[0]).length);
- while (++i < n) {
- if (node = group[i]) {
- value[i] = node.__data__;
+ while (length--) {
+ if (array[length] === placeholder) {
+ ++result;
}
}
- return value;
+ return result;
}
- function bind(group, groupData) {
- var i,
- n = group.length,
- m = groupData.length,
- n0 = Math.min(n, m),
- updateNodes = new Array(m),
- enterNodes = new Array(m),
- exitNodes = new Array(n),
- node,
- nodeData;
-
- if (key) {
- var nodeByKeyValue = new d3_Map,
- keyValues = new Array(n),
- keyValue;
-
- for (i = -1; ++i < n;) {
- if (nodeByKeyValue.has(keyValue = key.call(node = group[i], node.__data__, i))) {
- exitNodes[i] = node; // duplicate selection key
- } else {
- nodeByKeyValue.set(keyValue, node);
- }
- keyValues[i] = keyValue;
- }
+ /**
+ * Used by `_.deburr` to convert Latin-1 Supplement and Latin Extended-A
+ * letters to basic Latin letters.
+ *
+ * @private
+ * @param {string} letter The matched letter to deburr.
+ * @returns {string} Returns the deburred letter.
+ */
+ var deburrLetter = basePropertyOf(deburredLetters);
- for (i = -1; ++i < m;) {
- if (!(node = nodeByKeyValue.get(keyValue = key.call(groupData, nodeData = groupData[i], i)))) {
- enterNodes[i] = d3_selection_dataNode(nodeData);
- } else if (node !== true) { // no duplicate data key
- updateNodes[i] = node;
- node.__data__ = nodeData;
- }
- nodeByKeyValue.set(keyValue, true);
- }
+ /**
+ * Used by `_.escape` to convert characters to HTML entities.
+ *
+ * @private
+ * @param {string} chr The matched character to escape.
+ * @returns {string} Returns the escaped character.
+ */
+ var escapeHtmlChar = basePropertyOf(htmlEscapes);
- for (i = -1; ++i < n;) {
- if (nodeByKeyValue.get(keyValues[i]) !== true) {
- exitNodes[i] = group[i];
- }
- }
- } else {
- for (i = -1; ++i < n0;) {
- node = group[i];
- nodeData = groupData[i];
- if (node) {
- node.__data__ = nodeData;
- updateNodes[i] = node;
- } else {
- enterNodes[i] = d3_selection_dataNode(nodeData);
- }
- }
- for (; i < m; ++i) {
- enterNodes[i] = d3_selection_dataNode(groupData[i]);
- }
- for (; i < n; ++i) {
- exitNodes[i] = group[i];
- }
- }
+ /**
+ * Used by `_.template` to escape characters for inclusion in compiled string literals.
+ *
+ * @private
+ * @param {string} chr The matched character to escape.
+ * @returns {string} Returns the escaped character.
+ */
+ function escapeStringChar(chr) {
+ return '\\' + stringEscapes[chr];
+ }
- enterNodes.update
- = updateNodes;
+ /**
+ * Gets the value at `key` of `object`.
+ *
+ * @private
+ * @param {Object} [object] The object to query.
+ * @param {string} key The key of the property to get.
+ * @returns {*} Returns the property value.
+ */
+ function getValue(object, key) {
+ return object == null ? undefined : object[key];
+ }
- enterNodes.parentNode
- = updateNodes.parentNode
- = exitNodes.parentNode
- = group.parentNode;
+ /**
+ * Checks if `string` contains Unicode symbols.
+ *
+ * @private
+ * @param {string} string The string to inspect.
+ * @returns {boolean} Returns `true` if a symbol is found, else `false`.
+ */
+ function hasUnicode(string) {
+ return reHasUnicode.test(string);
+ }
- enter.push(enterNodes);
- update.push(updateNodes);
- exit.push(exitNodes);
+ /**
+ * Checks if `string` contains a word composed of Unicode symbols.
+ *
+ * @private
+ * @param {string} string The string to inspect.
+ * @returns {boolean} Returns `true` if a word is found, else `false`.
+ */
+ function hasUnicodeWord(string) {
+ return reHasUnicodeWord.test(string);
}
- var enter = d3_selection_enter([]),
- update = d3_selection([]),
- exit = d3_selection([]);
+ /**
+ * Converts `iterator` to an array.
+ *
+ * @private
+ * @param {Object} iterator The iterator to convert.
+ * @returns {Array} Returns the converted array.
+ */
+ function iteratorToArray(iterator) {
+ var data,
+ result = [];
- if (typeof value === "function") {
- while (++i < n) {
- bind(group = this[i], value.call(group, group.parentNode.__data__, i));
- }
- } else {
- while (++i < n) {
- bind(group = this[i], value);
+ while (!(data = iterator.next()).done) {
+ result.push(data.value);
}
+ return result;
}
- update.enter = function() { return enter; };
- update.exit = function() { return exit; };
- return update;
-};
-
-function d3_selection_dataNode(data) {
- return {__data__: data};
-}
+ /**
+ * Converts `map` to its key-value pairs.
+ *
+ * @private
+ * @param {Object} map The map to convert.
+ * @returns {Array} Returns the key-value pairs.
+ */
+ function mapToArray(map) {
+ var index = -1,
+ result = Array(map.size);
-d3_selectionPrototype.datum = function(value) {
- return arguments.length
- ? this.property("__data__", value)
- : this.property("__data__");
-};
+ map.forEach(function(value, key) {
+ result[++index] = [key, value];
+ });
+ return result;
+ }
-d3_selectionPrototype.filter = function(filter) {
- var subgroups = [],
- subgroup,
- group,
- node;
+ /**
+ * Creates a unary function that invokes `func` with its argument transformed.
+ *
+ * @private
+ * @param {Function} func The function to wrap.
+ * @param {Function} transform The argument transform.
+ * @returns {Function} Returns the new function.
+ */
+ function overArg(func, transform) {
+ return function(arg) {
+ return func(transform(arg));
+ };
+ }
- if (typeof filter !== "function") filter = d3_selection_filter(filter);
+ /**
+ * Replaces all `placeholder` elements in `array` with an internal placeholder
+ * and returns an array of their indexes.
+ *
+ * @private
+ * @param {Array} array The array to modify.
+ * @param {*} placeholder The placeholder to replace.
+ * @returns {Array} Returns the new array of placeholder indexes.
+ */
+ function replaceHolders(array, placeholder) {
+ var index = -1,
+ length = array.length,
+ resIndex = 0,
+ result = [];
- for (var j = 0, m = this.length; j < m; j++) {
- subgroups.push(subgroup = []);
- subgroup.parentNode = (group = this[j]).parentNode;
- for (var i = 0, n = group.length; i < n; i++) {
- if ((node = group[i]) && filter.call(node, node.__data__, i, j)) {
- subgroup.push(node);
+ while (++index < length) {
+ var value = array[index];
+ if (value === placeholder || value === PLACEHOLDER) {
+ array[index] = PLACEHOLDER;
+ result[resIndex++] = index;
}
}
+ return result;
}
- return d3_selection(subgroups);
-};
-
-function d3_selection_filter(selector) {
- return function() {
- return d3_selectMatches(this, selector);
- };
-}
+ /**
+ * Converts `set` to an array of its values.
+ *
+ * @private
+ * @param {Object} set The set to convert.
+ * @returns {Array} Returns the values.
+ */
+ function setToArray(set) {
+ var index = -1,
+ result = Array(set.size);
-d3_selectionPrototype.order = function() {
- for (var j = -1, m = this.length; ++j < m;) {
- for (var group = this[j], i = group.length - 1, next = group[i], node; --i >= 0;) {
- if (node = group[i]) {
- if (next && next !== node.nextSibling) next.parentNode.insertBefore(node, next);
- next = node;
- }
- }
+ set.forEach(function(value) {
+ result[++index] = value;
+ });
+ return result;
}
- return this;
-};
-d3_selectionPrototype.sort = function(comparator) {
- comparator = d3_selection_sortComparator.apply(this, arguments);
- for (var j = -1, m = this.length; ++j < m;) this[j].sort(comparator);
- return this.order();
-};
+ /**
+ * Converts `set` to its value-value pairs.
+ *
+ * @private
+ * @param {Object} set The set to convert.
+ * @returns {Array} Returns the value-value pairs.
+ */
+ function setToPairs(set) {
+ var index = -1,
+ result = Array(set.size);
-function d3_selection_sortComparator(comparator) {
- if (!arguments.length) comparator = d3_ascending;
- return function(a, b) {
- return a && b ? comparator(a.__data__, b.__data__) : !a - !b;
- };
-}
+ set.forEach(function(value) {
+ result[++index] = [value, value];
+ });
+ return result;
+ }
-d3_selectionPrototype.each = function(callback) {
- return d3_selection_each(this, function(node, i, j) {
- callback.call(node, node.__data__, i, j);
- });
-};
+ /**
+ * A specialized version of `_.indexOf` which performs strict equality
+ * comparisons of values, i.e. `===`.
+ *
+ * @private
+ * @param {Array} array The array to inspect.
+ * @param {*} value The value to search for.
+ * @param {number} fromIndex The index to search from.
+ * @returns {number} Returns the index of the matched value, else `-1`.
+ */
+ function strictIndexOf(array, value, fromIndex) {
+ var index = fromIndex - 1,
+ length = array.length;
-function d3_selection_each(groups, callback) {
- for (var j = 0, m = groups.length; j < m; j++) {
- for (var group = groups[j], i = 0, n = group.length, node; i < n; i++) {
- if (node = group[i]) callback(node, i, j);
+ while (++index < length) {
+ if (array[index] === value) {
+ return index;
+ }
}
+ return -1;
}
- return groups;
-}
-d3_selectionPrototype.call = function(callback) {
- var args = d3_array(arguments);
- callback.apply(args[0] = this, args);
- return this;
-};
+ /**
+ * A specialized version of `_.lastIndexOf` which performs strict equality
+ * comparisons of values, i.e. `===`.
+ *
+ * @private
+ * @param {Array} array The array to inspect.
+ * @param {*} value The value to search for.
+ * @param {number} fromIndex The index to search from.
+ * @returns {number} Returns the index of the matched value, else `-1`.
+ */
+ function strictLastIndexOf(array, value, fromIndex) {
+ var index = fromIndex + 1;
+ while (index--) {
+ if (array[index] === value) {
+ return index;
+ }
+ }
+ return index;
+ }
-d3_selectionPrototype.empty = function() {
- return !this.node();
-};
+ /**
+ * Gets the number of symbols in `string`.
+ *
+ * @private
+ * @param {string} string The string to inspect.
+ * @returns {number} Returns the string size.
+ */
+ function stringSize(string) {
+ return hasUnicode(string)
+ ? unicodeSize(string)
+ : asciiSize(string);
+ }
-d3_selectionPrototype.node = function() {
- for (var j = 0, m = this.length; j < m; j++) {
- for (var group = this[j], i = 0, n = group.length; i < n; i++) {
- var node = group[i];
- if (node) return node;
- }
+ /**
+ * Converts `string` to an array.
+ *
+ * @private
+ * @param {string} string The string to convert.
+ * @returns {Array} Returns the converted array.
+ */
+ function stringToArray(string) {
+ return hasUnicode(string)
+ ? unicodeToArray(string)
+ : asciiToArray(string);
}
- return null;
-};
-d3_selectionPrototype.size = function() {
- var n = 0;
- d3_selection_each(this, function() { ++n; });
- return n;
-};
+ /**
+ * Used by `_.unescape` to convert HTML entities to characters.
+ *
+ * @private
+ * @param {string} chr The matched character to unescape.
+ * @returns {string} Returns the unescaped character.
+ */
+ var unescapeHtmlChar = basePropertyOf(htmlUnescapes);
-function d3_selection_enter(selection) {
- d3_subclass(selection, d3_selection_enterPrototype);
- return selection;
-}
+ /**
+ * Gets the size of a Unicode `string`.
+ *
+ * @private
+ * @param {string} string The string inspect.
+ * @returns {number} Returns the string size.
+ */
+ function unicodeSize(string) {
+ var result = reUnicode.lastIndex = 0;
+ while (reUnicode.test(string)) {
+ ++result;
+ }
+ return result;
+ }
-var d3_selection_enterPrototype = [];
+ /**
+ * Converts a Unicode `string` to an array.
+ *
+ * @private
+ * @param {string} string The string to convert.
+ * @returns {Array} Returns the converted array.
+ */
+ function unicodeToArray(string) {
+ return string.match(reUnicode) || [];
+ }
-d3.selection.enter = d3_selection_enter;
-d3.selection.enter.prototype = d3_selection_enterPrototype;
+ /**
+ * Splits a Unicode `string` into an array of its words.
+ *
+ * @private
+ * @param {string} The string to inspect.
+ * @returns {Array} Returns the words of `string`.
+ */
+ function unicodeWords(string) {
+ return string.match(reUnicodeWord) || [];
+ }
-d3_selection_enterPrototype.append = d3_selectionPrototype.append;
-d3_selection_enterPrototype.empty = d3_selectionPrototype.empty;
-d3_selection_enterPrototype.node = d3_selectionPrototype.node;
-d3_selection_enterPrototype.call = d3_selectionPrototype.call;
-d3_selection_enterPrototype.size = d3_selectionPrototype.size;
+ /*--------------------------------------------------------------------------*/
+ /**
+ * Create a new pristine `lodash` function using the `context` object.
+ *
+ * @static
+ * @memberOf _
+ * @since 1.1.0
+ * @category Util
+ * @param {Object} [context=root] The context object.
+ * @returns {Function} Returns a new `lodash` function.
+ * @example
+ *
+ * _.mixin({ 'foo': _.constant('foo') });
+ *
+ * var lodash = _.runInContext();
+ * lodash.mixin({ 'bar': lodash.constant('bar') });
+ *
+ * _.isFunction(_.foo);
+ * // => true
+ * _.isFunction(_.bar);
+ * // => false
+ *
+ * lodash.isFunction(lodash.foo);
+ * // => false
+ * lodash.isFunction(lodash.bar);
+ * // => true
+ *
+ * // Create a suped-up `defer` in Node.js.
+ * var defer = _.runInContext({ 'setTimeout': setImmediate }).defer;
+ */
+ var runInContext = (function runInContext(context) {
+ context = context == null ? root : _.defaults(root.Object(), context, _.pick(root, contextProps));
+
+ /** Built-in constructor references. */
+ var Array = context.Array,
+ Date = context.Date,
+ Error = context.Error,
+ Function = context.Function,
+ Math = context.Math,
+ Object = context.Object,
+ RegExp = context.RegExp,
+ String = context.String,
+ TypeError = context.TypeError;
+
+ /** Used for built-in method references. */
+ var arrayProto = Array.prototype,
+ funcProto = Function.prototype,
+ objectProto = Object.prototype;
+
+ /** Used to detect overreaching core-js shims. */
+ var coreJsData = context['__core-js_shared__'];
+
+ /** Used to resolve the decompiled source of functions. */
+ var funcToString = funcProto.toString;
+
+ /** Used to check objects for own properties. */
+ var hasOwnProperty = objectProto.hasOwnProperty;
+
+ /** Used to generate unique IDs. */
+ var idCounter = 0;
+
+ /** Used to detect methods masquerading as native. */
+ var maskSrcKey = (function() {
+ var uid = /[^.]+$/.exec(coreJsData && coreJsData.keys && coreJsData.keys.IE_PROTO || '');
+ return uid ? ('Symbol(src)_1.' + uid) : '';
+ }());
-d3_selection_enterPrototype.select = function(selector) {
- var subgroups = [],
- subgroup,
- subnode,
- upgroup,
- group,
- node;
+ /**
+ * Used to resolve the
+ * [`toStringTag`](http://ecma-international.org/ecma-262/7.0/#sec-object.prototype.tostring)
+ * of values.
+ */
+ var nativeObjectToString = objectProto.toString;
+
+ /** Used to infer the `Object` constructor. */
+ var objectCtorString = funcToString.call(Object);
+
+ /** Used to restore the original `_` reference in `_.noConflict`. */
+ var oldDash = root._;
+
+ /** Used to detect if a method is native. */
+ var reIsNative = RegExp('^' +
+ funcToString.call(hasOwnProperty).replace(reRegExpChar, '\\$&')
+ .replace(/hasOwnProperty|(function).*?(?=\\\()| for .+?(?=\\\])/g, '$1.*?') + '$'
+ );
+
+ /** Built-in value references. */
+ var Buffer = moduleExports ? context.Buffer : undefined,
+ Symbol = context.Symbol,
+ Uint8Array = context.Uint8Array,
+ allocUnsafe = Buffer ? Buffer.allocUnsafe : undefined,
+ getPrototype = overArg(Object.getPrototypeOf, Object),
+ objectCreate = Object.create,
+ propertyIsEnumerable = objectProto.propertyIsEnumerable,
+ splice = arrayProto.splice,
+ spreadableSymbol = Symbol ? Symbol.isConcatSpreadable : undefined,
+ symIterator = Symbol ? Symbol.iterator : undefined,
+ symToStringTag = Symbol ? Symbol.toStringTag : undefined;
+
+ var defineProperty = (function() {
+ try {
+ var func = getNative(Object, 'defineProperty');
+ func({}, '', {});
+ return func;
+ } catch (e) {}
+ }());
+
+ /** Mocked built-ins. */
+ var ctxClearTimeout = context.clearTimeout !== root.clearTimeout && context.clearTimeout,
+ ctxNow = Date && Date.now !== root.Date.now && Date.now,
+ ctxSetTimeout = context.setTimeout !== root.setTimeout && context.setTimeout;
+
+ /* Built-in method references for those with the same name as other `lodash` methods. */
+ var nativeCeil = Math.ceil,
+ nativeFloor = Math.floor,
+ nativeGetSymbols = Object.getOwnPropertySymbols,
+ nativeIsBuffer = Buffer ? Buffer.isBuffer : undefined,
+ nativeIsFinite = context.isFinite,
+ nativeJoin = arrayProto.join,
+ nativeKeys = overArg(Object.keys, Object),
+ nativeMax = Math.max,
+ nativeMin = Math.min,
+ nativeNow = Date.now,
+ nativeParseInt = context.parseInt,
+ nativeRandom = Math.random,
+ nativeReverse = arrayProto.reverse;
+
+ /* Built-in method references that are verified to be native. */
+ var DataView = getNative(context, 'DataView'),
+ Map = getNative(context, 'Map'),
+ Promise = getNative(context, 'Promise'),
+ Set = getNative(context, 'Set'),
+ WeakMap = getNative(context, 'WeakMap'),
+ nativeCreate = getNative(Object, 'create');
+
+ /** Used to store function metadata. */
+ var metaMap = WeakMap && new WeakMap;
+
+ /** Used to lookup unminified function names. */
+ var realNames = {};
+
+ /** Used to detect maps, sets, and weakmaps. */
+ var dataViewCtorString = toSource(DataView),
+ mapCtorString = toSource(Map),
+ promiseCtorString = toSource(Promise),
+ setCtorString = toSource(Set),
+ weakMapCtorString = toSource(WeakMap);
+
+ /** Used to convert symbols to primitives and strings. */
+ var symbolProto = Symbol ? Symbol.prototype : undefined,
+ symbolValueOf = symbolProto ? symbolProto.valueOf : undefined,
+ symbolToString = symbolProto ? symbolProto.toString : undefined;
+
+ /*------------------------------------------------------------------------*/
- for (var j = -1, m = this.length; ++j < m;) {
- upgroup = (group = this[j]).update;
- subgroups.push(subgroup = []);
- subgroup.parentNode = group.parentNode;
- for (var i = -1, n = group.length; ++i < n;) {
- if (node = group[i]) {
- subgroup.push(upgroup[i] = subnode = selector.call(group.parentNode, node.__data__, i, j));
- subnode.__data__ = node.__data__;
- } else {
- subgroup.push(null);
+ /**
+ * Creates a `lodash` object which wraps `value` to enable implicit method
+ * chain sequences. Methods that operate on and return arrays, collections,
+ * and functions can be chained together. Methods that retrieve a single value
+ * or may return a primitive value will automatically end the chain sequence
+ * and return the unwrapped value. Otherwise, the value must be unwrapped
+ * with `_#value`.
+ *
+ * Explicit chain sequences, which must be unwrapped with `_#value`, may be
+ * enabled using `_.chain`.
+ *
+ * The execution of chained methods is lazy, that is, it's deferred until
+ * `_#value` is implicitly or explicitly called.
+ *
+ * Lazy evaluation allows several methods to support shortcut fusion.
+ * Shortcut fusion is an optimization to merge iteratee calls; this avoids
+ * the creation of intermediate arrays and can greatly reduce the number of
+ * iteratee executions. Sections of a chain sequence qualify for shortcut
+ * fusion if the section is applied to an array and iteratees accept only
+ * one argument. The heuristic for whether a section qualifies for shortcut
+ * fusion is subject to change.
+ *
+ * Chaining is supported in custom builds as long as the `_#value` method is
+ * directly or indirectly included in the build.
+ *
+ * In addition to lodash methods, wrappers have `Array` and `String` methods.
+ *
+ * The wrapper `Array` methods are:
+ * `concat`, `join`, `pop`, `push`, `shift`, `sort`, `splice`, and `unshift`
+ *
+ * The wrapper `String` methods are:
+ * `replace` and `split`
+ *
+ * The wrapper methods that support shortcut fusion are:
+ * `at`, `compact`, `drop`, `dropRight`, `dropWhile`, `filter`, `find`,
+ * `findLast`, `head`, `initial`, `last`, `map`, `reject`, `reverse`, `slice`,
+ * `tail`, `take`, `takeRight`, `takeRightWhile`, `takeWhile`, and `toArray`
+ *
+ * The chainable wrapper methods are:
+ * `after`, `ary`, `assign`, `assignIn`, `assignInWith`, `assignWith`, `at`,
+ * `before`, `bind`, `bindAll`, `bindKey`, `castArray`, `chain`, `chunk`,
+ * `commit`, `compact`, `concat`, `conforms`, `constant`, `countBy`, `create`,
+ * `curry`, `debounce`, `defaults`, `defaultsDeep`, `defer`, `delay`,
+ * `difference`, `differenceBy`, `differenceWith`, `drop`, `dropRight`,
+ * `dropRightWhile`, `dropWhile`, `extend`, `extendWith`, `fill`, `filter`,
+ * `flatMap`, `flatMapDeep`, `flatMapDepth`, `flatten`, `flattenDeep`,
+ * `flattenDepth`, `flip`, `flow`, `flowRight`, `fromPairs`, `functions`,
+ * `functionsIn`, `groupBy`, `initial`, `intersection`, `intersectionBy`,
+ * `intersectionWith`, `invert`, `invertBy`, `invokeMap`, `iteratee`, `keyBy`,
+ * `keys`, `keysIn`, `map`, `mapKeys`, `mapValues`, `matches`, `matchesProperty`,
+ * `memoize`, `merge`, `mergeWith`, `method`, `methodOf`, `mixin`, `negate`,
+ * `nthArg`, `omit`, `omitBy`, `once`, `orderBy`, `over`, `overArgs`,
+ * `overEvery`, `overSome`, `partial`, `partialRight`, `partition`, `pick`,
+ * `pickBy`, `plant`, `property`, `propertyOf`, `pull`, `pullAll`, `pullAllBy`,
+ * `pullAllWith`, `pullAt`, `push`, `range`, `rangeRight`, `rearg`, `reject`,
+ * `remove`, `rest`, `reverse`, `sampleSize`, `set`, `setWith`, `shuffle`,
+ * `slice`, `sort`, `sortBy`, `splice`, `spread`, `tail`, `take`, `takeRight`,
+ * `takeRightWhile`, `takeWhile`, `tap`, `throttle`, `thru`, `toArray`,
+ * `toPairs`, `toPairsIn`, `toPath`, `toPlainObject`, `transform`, `unary`,
+ * `union`, `unionBy`, `unionWith`, `uniq`, `uniqBy`, `uniqWith`, `unset`,
+ * `unshift`, `unzip`, `unzipWith`, `update`, `updateWith`, `values`,
+ * `valuesIn`, `without`, `wrap`, `xor`, `xorBy`, `xorWith`, `zip`,
+ * `zipObject`, `zipObjectDeep`, and `zipWith`
+ *
+ * The wrapper methods that are **not** chainable by default are:
+ * `add`, `attempt`, `camelCase`, `capitalize`, `ceil`, `clamp`, `clone`,
+ * `cloneDeep`, `cloneDeepWith`, `cloneWith`, `conformsTo`, `deburr`,
+ * `defaultTo`, `divide`, `each`, `eachRight`, `endsWith`, `eq`, `escape`,
+ * `escapeRegExp`, `every`, `find`, `findIndex`, `findKey`, `findLast`,
+ * `findLastIndex`, `findLastKey`, `first`, `floor`, `forEach`, `forEachRight`,
+ * `forIn`, `forInRight`, `forOwn`, `forOwnRight`, `get`, `gt`, `gte`, `has`,
+ * `hasIn`, `head`, `identity`, `includes`, `indexOf`, `inRange`, `invoke`,
+ * `isArguments`, `isArray`, `isArrayBuffer`, `isArrayLike`, `isArrayLikeObject`,
+ * `isBoolean`, `isBuffer`, `isDate`, `isElement`, `isEmpty`, `isEqual`,
+ * `isEqualWith`, `isError`, `isFinite`, `isFunction`, `isInteger`, `isLength`,
+ * `isMap`, `isMatch`, `isMatchWith`, `isNaN`, `isNative`, `isNil`, `isNull`,
+ * `isNumber`, `isObject`, `isObjectLike`, `isPlainObject`, `isRegExp`,
+ * `isSafeInteger`, `isSet`, `isString`, `isUndefined`, `isTypedArray`,
+ * `isWeakMap`, `isWeakSet`, `join`, `kebabCase`, `last`, `lastIndexOf`,
+ * `lowerCase`, `lowerFirst`, `lt`, `lte`, `max`, `maxBy`, `mean`, `meanBy`,
+ * `min`, `minBy`, `multiply`, `noConflict`, `noop`, `now`, `nth`, `pad`,
+ * `padEnd`, `padStart`, `parseInt`, `pop`, `random`, `reduce`, `reduceRight`,
+ * `repeat`, `result`, `round`, `runInContext`, `sample`, `shift`, `size`,
+ * `snakeCase`, `some`, `sortedIndex`, `sortedIndexBy`, `sortedLastIndex`,
+ * `sortedLastIndexBy`, `startCase`, `startsWith`, `stubArray`, `stubFalse`,
+ * `stubObject`, `stubString`, `stubTrue`, `subtract`, `sum`, `sumBy`,
+ * `template`, `times`, `toFinite`, `toInteger`, `toJSON`, `toLength`,
+ * `toLower`, `toNumber`, `toSafeInteger`, `toString`, `toUpper`, `trim`,
+ * `trimEnd`, `trimStart`, `truncate`, `unescape`, `uniqueId`, `upperCase`,
+ * `upperFirst`, `value`, and `words`
+ *
+ * @name _
+ * @constructor
+ * @category Seq
+ * @param {*} value The value to wrap in a `lodash` instance.
+ * @returns {Object} Returns the new `lodash` wrapper instance.
+ * @example
+ *
+ * function square(n) {
+ * return n * n;
+ * }
+ *
+ * var wrapped = _([1, 2, 3]);
+ *
+ * // Returns an unwrapped value.
+ * wrapped.reduce(_.add);
+ * // => 6
+ *
+ * // Returns a wrapped value.
+ * var squares = wrapped.map(square);
+ *
+ * _.isArray(squares);
+ * // => false
+ *
+ * _.isArray(squares.value());
+ * // => true
+ */
+ function lodash(value) {
+ if (isObjectLike(value) && !isArray(value) && !(value instanceof LazyWrapper)) {
+ if (value instanceof LodashWrapper) {
+ return value;
+ }
+ if (hasOwnProperty.call(value, '__wrapped__')) {
+ return wrapperClone(value);
+ }
}
+ return new LodashWrapper(value);
}
- }
- return d3_selection(subgroups);
-};
+ /**
+ * The base implementation of `_.create` without support for assigning
+ * properties to the created object.
+ *
+ * @private
+ * @param {Object} proto The object to inherit from.
+ * @returns {Object} Returns the new object.
+ */
+ var baseCreate = (function() {
+ function object() {}
+ return function(proto) {
+ if (!isObject(proto)) {
+ return {};
+ }
+ if (objectCreate) {
+ return objectCreate(proto);
+ }
+ object.prototype = proto;
+ var result = new object;
+ object.prototype = undefined;
+ return result;
+ };
+ }());
-d3_selection_enterPrototype.insert = function(name, before) {
- if (arguments.length < 2) before = d3_selection_enterInsertBefore(this);
- return d3_selectionPrototype.insert.call(this, name, before);
-};
+ /**
+ * The function whose prototype chain sequence wrappers inherit from.
+ *
+ * @private
+ */
+ function baseLodash() {
+ // No operation performed.
+ }
-function d3_selection_enterInsertBefore(enter) {
- var i0, j0;
- return function(d, i, j) {
- var group = enter[j].update,
- n = group.length,
- node;
- if (j != j0) j0 = j, i0 = 0;
- if (i >= i0) i0 = i + 1;
- while (!(node = group[i0]) && ++i0 < n);
- return node;
- };
-}
+ /**
+ * The base constructor for creating `lodash` wrapper objects.
+ *
+ * @private
+ * @param {*} value The value to wrap.
+ * @param {boolean} [chainAll] Enable explicit method chain sequences.
+ */
+ function LodashWrapper(value, chainAll) {
+ this.__wrapped__ = value;
+ this.__actions__ = [];
+ this.__chain__ = !!chainAll;
+ this.__index__ = 0;
+ this.__values__ = undefined;
+ }
-// TODO fast singleton implementation?
-d3.select = function(node) {
- var group;
- if (typeof node === "string") {
- group = [d3_select(node, d3_document)];
- group.parentNode = d3_document.documentElement;
- } else {
- group = [node];
- group.parentNode = d3_documentElement(node);
- }
- return d3_selection([group]);
-};
+ /**
+ * By default, the template delimiters used by lodash are like those in
+ * embedded Ruby (ERB) as well as ES2015 template strings. Change the
+ * following template settings to use alternative delimiters.
+ *
+ * @static
+ * @memberOf _
+ * @type {Object}
+ */
+ lodash.templateSettings = {
+
+ /**
+ * Used to detect `data` property values to be HTML-escaped.
+ *
+ * @memberOf _.templateSettings
+ * @type {RegExp}
+ */
+ 'escape': reEscape,
+
+ /**
+ * Used to detect code to be evaluated.
+ *
+ * @memberOf _.templateSettings
+ * @type {RegExp}
+ */
+ 'evaluate': reEvaluate,
+
+ /**
+ * Used to detect `data` property values to inject.
+ *
+ * @memberOf _.templateSettings
+ * @type {RegExp}
+ */
+ 'interpolate': reInterpolate,
+
+ /**
+ * Used to reference the data object in the template text.
+ *
+ * @memberOf _.templateSettings
+ * @type {string}
+ */
+ 'variable': '',
+
+ /**
+ * Used to import variables into the compiled template.
+ *
+ * @memberOf _.templateSettings
+ * @type {Object}
+ */
+ 'imports': {
+
+ /**
+ * A reference to the `lodash` function.
+ *
+ * @memberOf _.templateSettings.imports
+ * @type {Function}
+ */
+ '_': lodash
+ }
+ };
-d3.selectAll = function(nodes) {
- var group;
- if (typeof nodes === "string") {
- group = d3_array(d3_selectAll(nodes, d3_document));
- group.parentNode = d3_document.documentElement;
- } else {
- group = nodes;
- group.parentNode = null;
- }
- return d3_selection([group]);
-};
+ // Ensure wrappers are instances of `baseLodash`.
+ lodash.prototype = baseLodash.prototype;
+ lodash.prototype.constructor = lodash;
-d3_selectionPrototype.on = function(type, listener, capture) {
- var n = arguments.length;
- if (n < 3) {
+ LodashWrapper.prototype = baseCreate(baseLodash.prototype);
+ LodashWrapper.prototype.constructor = LodashWrapper;
- // For on(object) or on(object, boolean), the object specifies the event
- // types and listeners to add or remove. The optional boolean specifies
- // whether the listener captures events.
- if (typeof type !== "string") {
- if (n < 2) listener = false;
- for (capture in type) this.each(d3_selection_on(capture, type[capture], listener));
- return this;
- }
+ /*------------------------------------------------------------------------*/
- // For on(string), return the listener for the first node.
- if (n < 2) return (n = this.node()["__on" + type]) && n._;
+ /**
+ * Creates a lazy wrapper object which wraps `value` to enable lazy evaluation.
+ *
+ * @private
+ * @constructor
+ * @param {*} value The value to wrap.
+ */
+ function LazyWrapper(value) {
+ this.__wrapped__ = value;
+ this.__actions__ = [];
+ this.__dir__ = 1;
+ this.__filtered__ = false;
+ this.__iteratees__ = [];
+ this.__takeCount__ = MAX_ARRAY_LENGTH;
+ this.__views__ = [];
+ }
- // For on(string, function), use the default capture.
- capture = false;
- }
+ /**
+ * Creates a clone of the lazy wrapper object.
+ *
+ * @private
+ * @name clone
+ * @memberOf LazyWrapper
+ * @returns {Object} Returns the cloned `LazyWrapper` object.
+ */
+ function lazyClone() {
+ var result = new LazyWrapper(this.__wrapped__);
+ result.__actions__ = copyArray(this.__actions__);
+ result.__dir__ = this.__dir__;
+ result.__filtered__ = this.__filtered__;
+ result.__iteratees__ = copyArray(this.__iteratees__);
+ result.__takeCount__ = this.__takeCount__;
+ result.__views__ = copyArray(this.__views__);
+ return result;
+ }
- // Otherwise, a type, listener and capture are specified, and handled as below.
- return this.each(d3_selection_on(type, listener, capture));
-};
+ /**
+ * Reverses the direction of lazy iteration.
+ *
+ * @private
+ * @name reverse
+ * @memberOf LazyWrapper
+ * @returns {Object} Returns the new reversed `LazyWrapper` object.
+ */
+ function lazyReverse() {
+ if (this.__filtered__) {
+ var result = new LazyWrapper(this);
+ result.__dir__ = -1;
+ result.__filtered__ = true;
+ } else {
+ result = this.clone();
+ result.__dir__ *= -1;
+ }
+ return result;
+ }
-function d3_selection_on(type, listener, capture) {
- var name = "__on" + type,
- i = type.indexOf("."),
- wrap = d3_selection_onListener;
+ /**
+ * Extracts the unwrapped value from its lazy wrapper.
+ *
+ * @private
+ * @name value
+ * @memberOf LazyWrapper
+ * @returns {*} Returns the unwrapped value.
+ */
+ function lazyValue() {
+ var array = this.__wrapped__.value(),
+ dir = this.__dir__,
+ isArr = isArray(array),
+ isRight = dir < 0,
+ arrLength = isArr ? array.length : 0,
+ view = getView(0, arrLength, this.__views__),
+ start = view.start,
+ end = view.end,
+ length = end - start,
+ index = isRight ? end : (start - 1),
+ iteratees = this.__iteratees__,
+ iterLength = iteratees.length,
+ resIndex = 0,
+ takeCount = nativeMin(length, this.__takeCount__);
+
+ if (!isArr || (!isRight && arrLength == length && takeCount == length)) {
+ return baseWrapperValue(array, this.__actions__);
+ }
+ var result = [];
- if (i > 0) type = type.slice(0, i);
- var filter = d3_selection_onFilters.get(type);
- if (filter) type = filter, wrap = d3_selection_onFilter;
+ outer:
+ while (length-- && resIndex < takeCount) {
+ index += dir;
- function onRemove() {
- var l = this[name];
- if (l) {
- this.removeEventListener(type, l, l.$);
- delete this[name];
- }
- }
+ var iterIndex = -1,
+ value = array[index];
- function onAdd() {
- var l = wrap(listener, d3_array(arguments));
- if (typeof Raven !== 'undefined') l = Raven.wrap(l);
- onRemove.call(this);
- this.addEventListener(type, this[name] = l, l.$ = capture);
- l._ = listener;
- }
+ while (++iterIndex < iterLength) {
+ var data = iteratees[iterIndex],
+ iteratee = data.iteratee,
+ type = data.type,
+ computed = iteratee(value);
- function removeAll() {
- var re = new RegExp("^__on([^.]+)" + d3.requote(type) + "$"),
- match;
- for (var name in this) {
- if (match = name.match(re)) {
- var l = this[name];
- this.removeEventListener(match[1], l, l.$);
- delete this[name];
+ if (type == LAZY_MAP_FLAG) {
+ value = computed;
+ } else if (!computed) {
+ if (type == LAZY_FILTER_FLAG) {
+ continue outer;
+ } else {
+ break outer;
+ }
+ }
+ }
+ result[resIndex++] = value;
}
+ return result;
}
- }
- return i
- ? listener ? onAdd : onRemove
- : listener ? d3_noop : removeAll;
-}
+ // Ensure `LazyWrapper` is an instance of `baseLodash`.
+ LazyWrapper.prototype = baseCreate(baseLodash.prototype);
+ LazyWrapper.prototype.constructor = LazyWrapper;
-var d3_selection_onFilters = d3.map({
- mouseenter: "mouseover",
- mouseleave: "mouseout"
-});
+ /*------------------------------------------------------------------------*/
-if (d3_document) {
- d3_selection_onFilters.forEach(function(k) {
- if ("on" + k in d3_document) d3_selection_onFilters.remove(k);
- });
-}
+ /**
+ * Creates a hash object.
+ *
+ * @private
+ * @constructor
+ * @param {Array} [entries] The key-value pairs to cache.
+ */
+ function Hash(entries) {
+ var index = -1,
+ length = entries == null ? 0 : entries.length;
-function d3_selection_onListener(listener, argumentz) {
- return function(e) {
- var o = d3.event; // Events can be reentrant (e.g., focus).
- d3.event = e;
- argumentz[0] = this.__data__;
- try {
- listener.apply(this, argumentz);
- } finally {
- d3.event = o;
+ this.clear();
+ while (++index < length) {
+ var entry = entries[index];
+ this.set(entry[0], entry[1]);
+ }
}
- };
-}
-function d3_selection_onFilter(listener, argumentz) {
- var l = d3_selection_onListener(listener, argumentz);
- return function(e) {
- var target = this, related = e.relatedTarget;
- if (!related || (related !== target && !(related.compareDocumentPosition(target) & 8))) {
- l.call(target, e);
+ /**
+ * Removes all key-value entries from the hash.
+ *
+ * @private
+ * @name clear
+ * @memberOf Hash
+ */
+ function hashClear() {
+ this.__data__ = nativeCreate ? nativeCreate(null) : {};
+ this.size = 0;
}
- };
-}
-
-var d3_event_dragSelect,
- d3_event_dragId = 0;
-function d3_event_dragSuppress(node) {
- var name = ".dragsuppress-" + ++d3_event_dragId,
- click = "click" + name,
- w = d3.select(d3_window(node))
- .on("touchmove" + name, d3_eventPreventDefault)
- .on("dragstart" + name, d3_eventPreventDefault)
- .on("selectstart" + name, d3_eventPreventDefault);
+ /**
+ * Removes `key` and its value from the hash.
+ *
+ * @private
+ * @name delete
+ * @memberOf Hash
+ * @param {Object} hash The hash to modify.
+ * @param {string} key The key of the value to remove.
+ * @returns {boolean} Returns `true` if the entry was removed, else `false`.
+ */
+ function hashDelete(key) {
+ var result = this.has(key) && delete this.__data__[key];
+ this.size -= result ? 1 : 0;
+ return result;
+ }
- if (d3_event_dragSelect == null) {
- d3_event_dragSelect = "onselectstart" in node ? false
- : d3_vendorSymbol(node.style, "userSelect");
- }
+ /**
+ * Gets the hash value for `key`.
+ *
+ * @private
+ * @name get
+ * @memberOf Hash
+ * @param {string} key The key of the value to get.
+ * @returns {*} Returns the entry value.
+ */
+ function hashGet(key) {
+ var data = this.__data__;
+ if (nativeCreate) {
+ var result = data[key];
+ return result === HASH_UNDEFINED ? undefined : result;
+ }
+ return hasOwnProperty.call(data, key) ? data[key] : undefined;
+ }
- if (d3_event_dragSelect) {
- var style = d3_documentElement(node).style,
- select = style[d3_event_dragSelect];
- style[d3_event_dragSelect] = "none";
- }
+ /**
+ * Checks if a hash value for `key` exists.
+ *
+ * @private
+ * @name has
+ * @memberOf Hash
+ * @param {string} key The key of the entry to check.
+ * @returns {boolean} Returns `true` if an entry for `key` exists, else `false`.
+ */
+ function hashHas(key) {
+ var data = this.__data__;
+ return nativeCreate ? (data[key] !== undefined) : hasOwnProperty.call(data, key);
+ }
- return function(suppressClick) {
- w.on(name, null);
- if (d3_event_dragSelect) style[d3_event_dragSelect] = select;
- if (suppressClick) { // suppress the next click, but only if itâs immediate
- var off = function() { w.on(click, null); };
- w.on(click, function() { d3_eventCancel(); off(); }, true);
- setTimeout(off, 0);
+ /**
+ * Sets the hash `key` to `value`.
+ *
+ * @private
+ * @name set
+ * @memberOf Hash
+ * @param {string} key The key of the value to set.
+ * @param {*} value The value to set.
+ * @returns {Object} Returns the hash instance.
+ */
+ function hashSet(key, value) {
+ var data = this.__data__;
+ this.size += this.has(key) ? 0 : 1;
+ data[key] = (nativeCreate && value === undefined) ? HASH_UNDEFINED : value;
+ return this;
}
- };
-}
-d3.mouse = function(container) {
- return d3_mousePoint(container, d3_eventSource());
-};
+ // Add methods to `Hash`.
+ Hash.prototype.clear = hashClear;
+ Hash.prototype['delete'] = hashDelete;
+ Hash.prototype.get = hashGet;
+ Hash.prototype.has = hashHas;
+ Hash.prototype.set = hashSet;
-// https://bugs.webkit.org/show_bug.cgi?id=44083
-var d3_mouse_bug44083 = this.navigator && /WebKit/.test(this.navigator.userAgent) ? -1 : 0;
+ /*------------------------------------------------------------------------*/
-function d3_mousePoint(container, e) {
- if (e.changedTouches) e = e.changedTouches[0];
- var svg = container.ownerSVGElement || container;
- if (svg.createSVGPoint) {
- var point = svg.createSVGPoint();
- if (d3_mouse_bug44083 < 0) {
- var window = d3_window(container);
- if (window.scrollX || window.scrollY) {
- svg = d3.select("body").append("svg").style({
- position: "absolute",
- top: 0,
- left: 0,
- margin: 0,
- padding: 0,
- border: "none"
- }, "important");
- var ctm = svg[0][0].getScreenCTM();
- d3_mouse_bug44083 = !(ctm.f || ctm.e);
- svg.remove();
- }
- }
- if (d3_mouse_bug44083) point.x = e.pageX, point.y = e.pageY;
- else point.x = e.clientX, point.y = e.clientY;
- point = point.matrixTransform(container.getScreenCTM().inverse());
- return [point.x, point.y];
- }
- var rect = container.getBoundingClientRect();
- return [e.clientX - rect.left - container.clientLeft, e.clientY - rect.top - container.clientTop];
-};
+ /**
+ * Creates an list cache object.
+ *
+ * @private
+ * @constructor
+ * @param {Array} [entries] The key-value pairs to cache.
+ */
+ function ListCache(entries) {
+ var index = -1,
+ length = entries == null ? 0 : entries.length;
-d3.touches = function(container, touches) {
- if (arguments.length < 2) touches = d3_eventSource().touches;
- return touches ? d3_array(touches).map(function(touch) {
- var point = d3_mousePoint(container, touch);
- point.identifier = touch.identifier;
- return point;
- }) : [];
-};
-var ε = 1e-6,
- ε2 = ε * ε,
- Ï = Math.PI,
- Ï = 2 * Ï,
- Ïε = Ï - ε,
- halfÏ = Ï / 2,
- d3_radians = Ï / 180,
- d3_degrees = 180 / Ï;
+ this.clear();
+ while (++index < length) {
+ var entry = entries[index];
+ this.set(entry[0], entry[1]);
+ }
+ }
-function d3_sgn(x) {
- return x > 0 ? 1 : x < 0 ? -1 : 0;
-}
+ /**
+ * Removes all key-value entries from the list cache.
+ *
+ * @private
+ * @name clear
+ * @memberOf ListCache
+ */
+ function listCacheClear() {
+ this.__data__ = [];
+ this.size = 0;
+ }
-// Returns the 2D cross product of AB and AC vectors, i.e., the z-component of
-// the 3D cross product in a quadrant I Cartesian coordinate system (+x is
-// right, +y is up). Returns a positive value if ABC is counter-clockwise,
-// negative if clockwise, and zero if the points are collinear.
-function d3_cross2d(a, b, c) {
- return (b[0] - a[0]) * (c[1] - a[1]) - (b[1] - a[1]) * (c[0] - a[0]);
-}
+ /**
+ * Removes `key` and its value from the list cache.
+ *
+ * @private
+ * @name delete
+ * @memberOf ListCache
+ * @param {string} key The key of the value to remove.
+ * @returns {boolean} Returns `true` if the entry was removed, else `false`.
+ */
+ function listCacheDelete(key) {
+ var data = this.__data__,
+ index = assocIndexOf(data, key);
-function d3_acos(x) {
- return x > 1 ? 0 : x < -1 ? Ï : Math.acos(x);
-}
+ if (index < 0) {
+ return false;
+ }
+ var lastIndex = data.length - 1;
+ if (index == lastIndex) {
+ data.pop();
+ } else {
+ splice.call(data, index, 1);
+ }
+ --this.size;
+ return true;
+ }
-function d3_asin(x) {
- return x > 1 ? halfÏ : x < -1 ? -halfÏ : Math.asin(x);
-}
+ /**
+ * Gets the list cache value for `key`.
+ *
+ * @private
+ * @name get
+ * @memberOf ListCache
+ * @param {string} key The key of the value to get.
+ * @returns {*} Returns the entry value.
+ */
+ function listCacheGet(key) {
+ var data = this.__data__,
+ index = assocIndexOf(data, key);
-function d3_sinh(x) {
- return ((x = Math.exp(x)) - 1 / x) / 2;
-}
+ return index < 0 ? undefined : data[index][1];
+ }
-function d3_cosh(x) {
- return ((x = Math.exp(x)) + 1 / x) / 2;
-}
+ /**
+ * Checks if a list cache value for `key` exists.
+ *
+ * @private
+ * @name has
+ * @memberOf ListCache
+ * @param {string} key The key of the entry to check.
+ * @returns {boolean} Returns `true` if an entry for `key` exists, else `false`.
+ */
+ function listCacheHas(key) {
+ return assocIndexOf(this.__data__, key) > -1;
+ }
-function d3_tanh(x) {
- return ((x = Math.exp(2 * x)) - 1) / (x + 1);
-}
-
-function d3_haversin(x) {
- return (x = Math.sin(x / 2)) * x;
-}
-
-var Ï = Math.SQRT2,
- Ï2 = 2,
- Ï4 = 4;
-
-// p0 = [ux0, uy0, w0]
-// p1 = [ux1, uy1, w1]
-d3.interpolateZoom = function(p0, p1) {
- var ux0 = p0[0], uy0 = p0[1], w0 = p0[2],
- ux1 = p1[0], uy1 = p1[1], w1 = p1[2];
-
- var dx = ux1 - ux0,
- dy = uy1 - uy0,
- d2 = dx * dx + dy * dy,
- d1 = Math.sqrt(d2),
- b0 = (w1 * w1 - w0 * w0 + Ï4 * d2) / (2 * w0 * Ï2 * d1),
- b1 = (w1 * w1 - w0 * w0 - Ï4 * d2) / (2 * w1 * Ï2 * d1),
- r0 = Math.log(Math.sqrt(b0 * b0 + 1) - b0),
- r1 = Math.log(Math.sqrt(b1 * b1 + 1) - b1),
- dr = r1 - r0,
- S = (dr || Math.log(w1 / w0)) / Ï;
-
- function interpolate(t) {
- var s = t * S;
- if (dr) {
- // General case.
- var coshr0 = d3_cosh(r0),
- u = w0 / (Ï2 * d1) * (coshr0 * d3_tanh(Ï * s + r0) - d3_sinh(r0));
- return [
- ux0 + u * dx,
- uy0 + u * dy,
- w0 * coshr0 / d3_cosh(Ï * s + r0)
- ];
- }
- // Special case for u0 ~= u1.
- return [
- ux0 + t * dx,
- uy0 + t * dy,
- w0 * Math.exp(Ï * s)
- ];
- }
-
- interpolate.duration = S * 1000;
-
- return interpolate;
-};
-
-d3.behavior.zoom = function() {
- var view = {x: 0, y: 0, k: 1},
- translate0, // translate when we started zooming (to avoid drift)
- center0, // implicit desired position of translate0 after zooming
- center, // explicit desired position of translate0 after zooming
- size = [960, 500], // viewport size; required for zoom interpolation
- scaleExtent = d3_behavior_zoomInfinity,
- duration = 250,
- zooming = 0,
- mousedown = "mousedown.zoom",
- mousemove = "mousemove.zoom",
- mouseup = "mouseup.zoom",
- mousewheelTimer,
- touchstart = "touchstart.zoom",
- touchtime, // time of last touchstart (to detect double-tap)
- event = d3_eventDispatch(zoom, "zoomstart", "zoom", "zoomend"),
- x0,
- x1,
- y0,
- y1;
-
- // Lazily determine the DOMâs support for Wheel events.
- // https://developer.mozilla.org/en-US/docs/Mozilla_event_reference/wheel
- if (!d3_behavior_zoomWheel) {
- d3_behavior_zoomWheel = "onwheel" in d3_document ? (d3_behavior_zoomDelta = function() { return -d3.event.deltaY * (d3.event.deltaMode ? 120 : 1); }, "wheel")
- : "onmousewheel" in d3_document ? (d3_behavior_zoomDelta = function() { return d3.event.wheelDelta; }, "mousewheel")
- : (d3_behavior_zoomDelta = function() { return -d3.event.detail; }, "MozMousePixelScroll");
- }
+ /**
+ * Sets the list cache `key` to `value`.
+ *
+ * @private
+ * @name set
+ * @memberOf ListCache
+ * @param {string} key The key of the value to set.
+ * @param {*} value The value to set.
+ * @returns {Object} Returns the list cache instance.
+ */
+ function listCacheSet(key, value) {
+ var data = this.__data__,
+ index = assocIndexOf(data, key);
- function zoom(g) {
- g .on(mousedown, mousedowned)
- .on(d3_behavior_zoomWheel + ".zoom", mousewheeled)
- .on("dblclick.zoom", dblclicked)
- .on(touchstart, touchstarted);
- }
-
- zoom.event = function(g) {
- g.each(function() {
- var dispatch = event.of(this, arguments),
- view1 = view;
- if (d3_transitionInheritId) {
- d3.select(this).transition()
- .each("start.zoom", function() {
- view = this.__chart__ || {x: 0, y: 0, k: 1}; // pre-transition state
- zoomstarted(dispatch);
- })
- .tween("zoom:zoom", function() {
- var dx = size[0],
- dy = size[1],
- cx = center0 ? center0[0] : dx / 2,
- cy = center0 ? center0[1] : dy / 2,
- i = d3.interpolateZoom(
- [(cx - view.x) / view.k, (cy - view.y) / view.k, dx / view.k],
- [(cx - view1.x) / view1.k, (cy - view1.y) / view1.k, dx / view1.k]
- );
- return function(t) {
- var l = i(t), k = dx / l[2];
- this.__chart__ = view = {x: cx - l[0] * k, y: cy - l[1] * k, k: k};
- zoomed(dispatch);
- };
- })
- .each("interrupt.zoom", function() {
- zoomended(dispatch);
- })
- .each("end.zoom", function() {
- zoomended(dispatch);
- });
+ if (index < 0) {
+ ++this.size;
+ data.push([key, value]);
} else {
- this.__chart__ = view;
- zoomstarted(dispatch);
- zoomed(dispatch);
- zoomended(dispatch);
+ data[index][1] = value;
}
- });
- }
+ return this;
+ }
- zoom.translate = function(_) {
- if (!arguments.length) return [view.x, view.y];
- view = {x: +_[0], y: +_[1], k: view.k}; // copy-on-write
- rescale();
- return zoom;
- };
+ // Add methods to `ListCache`.
+ ListCache.prototype.clear = listCacheClear;
+ ListCache.prototype['delete'] = listCacheDelete;
+ ListCache.prototype.get = listCacheGet;
+ ListCache.prototype.has = listCacheHas;
+ ListCache.prototype.set = listCacheSet;
- zoom.scale = function(_) {
- if (!arguments.length) return view.k;
- view = {x: view.x, y: view.y, k: +_}; // copy-on-write
- rescale();
- return zoom;
- };
+ /*------------------------------------------------------------------------*/
- zoom.scaleExtent = function(_) {
- if (!arguments.length) return scaleExtent;
- scaleExtent = _ == null ? d3_behavior_zoomInfinity : [+_[0], +_[1]];
- return zoom;
- };
+ /**
+ * Creates a map cache object to store key-value pairs.
+ *
+ * @private
+ * @constructor
+ * @param {Array} [entries] The key-value pairs to cache.
+ */
+ function MapCache(entries) {
+ var index = -1,
+ length = entries == null ? 0 : entries.length;
- zoom.center = function(_) {
- if (!arguments.length) return center;
- center = _ && [+_[0], +_[1]];
- return zoom;
- };
+ this.clear();
+ while (++index < length) {
+ var entry = entries[index];
+ this.set(entry[0], entry[1]);
+ }
+ }
- zoom.size = function(_) {
- if (!arguments.length) return size;
- size = _ && [+_[0], +_[1]];
- return zoom;
- };
+ /**
+ * Removes all key-value entries from the map.
+ *
+ * @private
+ * @name clear
+ * @memberOf MapCache
+ */
+ function mapCacheClear() {
+ this.size = 0;
+ this.__data__ = {
+ 'hash': new Hash,
+ 'map': new (Map || ListCache),
+ 'string': new Hash
+ };
+ }
- zoom.duration = function(_) {
- if (!arguments.length) return duration;
- duration = +_; // TODO function based on interpolateZoom distance?
- return zoom;
- };
+ /**
+ * Removes `key` and its value from the map.
+ *
+ * @private
+ * @name delete
+ * @memberOf MapCache
+ * @param {string} key The key of the value to remove.
+ * @returns {boolean} Returns `true` if the entry was removed, else `false`.
+ */
+ function mapCacheDelete(key) {
+ var result = getMapData(this, key)['delete'](key);
+ this.size -= result ? 1 : 0;
+ return result;
+ }
- zoom.x = function(z) {
- if (!arguments.length) return x1;
- x1 = z;
- x0 = z.copy();
- view = {x: 0, y: 0, k: 1}; // copy-on-write
- return zoom;
- };
+ /**
+ * Gets the map value for `key`.
+ *
+ * @private
+ * @name get
+ * @memberOf MapCache
+ * @param {string} key The key of the value to get.
+ * @returns {*} Returns the entry value.
+ */
+ function mapCacheGet(key) {
+ return getMapData(this, key).get(key);
+ }
- zoom.y = function(z) {
- if (!arguments.length) return y1;
- y1 = z;
- y0 = z.copy();
- view = {x: 0, y: 0, k: 1}; // copy-on-write
- return zoom;
- };
+ /**
+ * Checks if a map value for `key` exists.
+ *
+ * @private
+ * @name has
+ * @memberOf MapCache
+ * @param {string} key The key of the entry to check.
+ * @returns {boolean} Returns `true` if an entry for `key` exists, else `false`.
+ */
+ function mapCacheHas(key) {
+ return getMapData(this, key).has(key);
+ }
- function location(p) {
- return [(p[0] - view.x) / view.k, (p[1] - view.y) / view.k];
- }
+ /**
+ * Sets the map `key` to `value`.
+ *
+ * @private
+ * @name set
+ * @memberOf MapCache
+ * @param {string} key The key of the value to set.
+ * @param {*} value The value to set.
+ * @returns {Object} Returns the map cache instance.
+ */
+ function mapCacheSet(key, value) {
+ var data = getMapData(this, key),
+ size = data.size;
- function point(l) {
- return [l[0] * view.k + view.x, l[1] * view.k + view.y];
- }
+ data.set(key, value);
+ this.size += data.size == size ? 0 : 1;
+ return this;
+ }
- function scaleTo(s) {
- view.k = Math.max(scaleExtent[0], Math.min(scaleExtent[1], s));
- }
+ // Add methods to `MapCache`.
+ MapCache.prototype.clear = mapCacheClear;
+ MapCache.prototype['delete'] = mapCacheDelete;
+ MapCache.prototype.get = mapCacheGet;
+ MapCache.prototype.has = mapCacheHas;
+ MapCache.prototype.set = mapCacheSet;
- function translateTo(p, l) {
- l = point(l);
- view.x += p[0] - l[0];
- view.y += p[1] - l[1];
- }
+ /*------------------------------------------------------------------------*/
- function zoomTo(that, p, l, k) {
- that.__chart__ = {x: view.x, y: view.y, k: view.k};
+ /**
+ *
+ * Creates an array cache object to store unique values.
+ *
+ * @private
+ * @constructor
+ * @param {Array} [values] The values to cache.
+ */
+ function SetCache(values) {
+ var index = -1,
+ length = values == null ? 0 : values.length;
- scaleTo(Math.pow(2, k));
- translateTo(center0 = p, l);
+ this.__data__ = new MapCache;
+ while (++index < length) {
+ this.add(values[index]);
+ }
+ }
- that = d3.select(that);
- if (duration > 0) that = that.transition().duration(duration);
- that.call(zoom.event);
- }
+ /**
+ * Adds `value` to the array cache.
+ *
+ * @private
+ * @name add
+ * @memberOf SetCache
+ * @alias push
+ * @param {*} value The value to cache.
+ * @returns {Object} Returns the cache instance.
+ */
+ function setCacheAdd(value) {
+ this.__data__.set(value, HASH_UNDEFINED);
+ return this;
+ }
- function rescale() {
- if (x1) x1.domain(x0.range().map(function(x) { return (x - view.x) / view.k; }).map(x0.invert));
- if (y1) y1.domain(y0.range().map(function(y) { return (y - view.y) / view.k; }).map(y0.invert));
- }
+ /**
+ * Checks if `value` is in the array cache.
+ *
+ * @private
+ * @name has
+ * @memberOf SetCache
+ * @param {*} value The value to search for.
+ * @returns {number} Returns `true` if `value` is found, else `false`.
+ */
+ function setCacheHas(value) {
+ return this.__data__.has(value);
+ }
- function zoomstarted(dispatch) {
- if (!zooming++) dispatch({type: "zoomstart"});
- }
+ // Add methods to `SetCache`.
+ SetCache.prototype.add = SetCache.prototype.push = setCacheAdd;
+ SetCache.prototype.has = setCacheHas;
- function zoomed(dispatch) {
- rescale();
- dispatch({type: "zoom", scale: view.k, translate: [view.x, view.y]});
- }
+ /*------------------------------------------------------------------------*/
- function zoomended(dispatch) {
- if (!--zooming) dispatch({type: "zoomend"});
- center0 = null;
- }
+ /**
+ * Creates a stack cache object to store key-value pairs.
+ *
+ * @private
+ * @constructor
+ * @param {Array} [entries] The key-value pairs to cache.
+ */
+ function Stack(entries) {
+ var data = this.__data__ = new ListCache(entries);
+ this.size = data.size;
+ }
- function mousedowned() {
- var that = this,
- target = d3.event.target,
- dispatch = event.of(that, arguments),
- dragged = 0,
- subject = d3.select(d3_window(that)).on(mousemove, moved).on(mouseup, ended),
- location0 = location(d3.mouse(that)),
- dragRestore = d3_event_dragSuppress(that);
+ /**
+ * Removes all key-value entries from the stack.
+ *
+ * @private
+ * @name clear
+ * @memberOf Stack
+ */
+ function stackClear() {
+ this.__data__ = new ListCache;
+ this.size = 0;
+ }
- d3_selection_interrupt.call(that);
- zoomstarted(dispatch);
+ /**
+ * Removes `key` and its value from the stack.
+ *
+ * @private
+ * @name delete
+ * @memberOf Stack
+ * @param {string} key The key of the value to remove.
+ * @returns {boolean} Returns `true` if the entry was removed, else `false`.
+ */
+ function stackDelete(key) {
+ var data = this.__data__,
+ result = data['delete'](key);
- function moved() {
- dragged = 1;
- translateTo(d3.mouse(that), location0);
- zoomed(dispatch);
+ this.size = data.size;
+ return result;
}
- function ended() {
- subject.on(mousemove, null).on(mouseup, null);
- dragRestore(dragged && d3.event.target === target);
- zoomended(dispatch);
+ /**
+ * Gets the stack value for `key`.
+ *
+ * @private
+ * @name get
+ * @memberOf Stack
+ * @param {string} key The key of the value to get.
+ * @returns {*} Returns the entry value.
+ */
+ function stackGet(key) {
+ return this.__data__.get(key);
}
- }
- // These closures persist for as long as at least one touch is active.
- function touchstarted() {
- var that = this,
- dispatch = event.of(that, arguments),
- locations0 = {}, // touchstart locations
- distance0 = 0, // distance² between initial touches
- scale0, // scale when we started touching
- zoomName = ".zoom-" + d3.event.changedTouches[0].identifier,
- touchmove = "touchmove" + zoomName,
- touchend = "touchend" + zoomName,
- targets = [],
- subject = d3.select(that),
- dragRestore = d3_event_dragSuppress(that);
-
- started();
- zoomstarted(dispatch);
-
- // Workaround for Chrome issue 412723: the touchstart listener must be set
- // after the touchmove listener.
- subject.on(mousedown, null).on(touchstart, started); // prevent duplicate events
-
- // Updates locations of any touches in locations0.
- function relocate() {
- var touches = d3.touches(that);
- scale0 = view.k;
- touches.forEach(function(t) {
- if (t.identifier in locations0) locations0[t.identifier] = location(t);
- });
- return touches;
+ /**
+ * Checks if a stack value for `key` exists.
+ *
+ * @private
+ * @name has
+ * @memberOf Stack
+ * @param {string} key The key of the entry to check.
+ * @returns {boolean} Returns `true` if an entry for `key` exists, else `false`.
+ */
+ function stackHas(key) {
+ return this.__data__.has(key);
}
- // Temporarily override touchstart while gesture is active.
- function started() {
-
- // Listen for touchmove and touchend on the target of touchstart.
- var target = d3.event.target;
- d3.select(target).on(touchmove, moved).on(touchend, ended);
- targets.push(target);
-
- // Only track touches started on the same subject element.
- var changed = d3.event.changedTouches;
- for (var i = 0, n = changed.length; i < n; ++i) {
- locations0[changed[i].identifier] = null;
+ /**
+ * Sets the stack `key` to `value`.
+ *
+ * @private
+ * @name set
+ * @memberOf Stack
+ * @param {string} key The key of the value to set.
+ * @param {*} value The value to set.
+ * @returns {Object} Returns the stack cache instance.
+ */
+ function stackSet(key, value) {
+ var data = this.__data__;
+ if (data instanceof ListCache) {
+ var pairs = data.__data__;
+ if (!Map || (pairs.length < LARGE_ARRAY_SIZE - 1)) {
+ pairs.push([key, value]);
+ this.size = ++data.size;
+ return this;
+ }
+ data = this.__data__ = new MapCache(pairs);
}
+ data.set(key, value);
+ this.size = data.size;
+ return this;
+ }
- var touches = relocate(),
- now = Date.now();
+ // Add methods to `Stack`.
+ Stack.prototype.clear = stackClear;
+ Stack.prototype['delete'] = stackDelete;
+ Stack.prototype.get = stackGet;
+ Stack.prototype.has = stackHas;
+ Stack.prototype.set = stackSet;
- if (touches.length === 1) {
- if (now - touchtime < 500) { // dbltap
- var p = touches[0];
- zoomTo(that, p, locations0[p.identifier], Math.floor(Math.log(view.k) / Math.LN2) + 1);
- d3_eventPreventDefault();
+ /*------------------------------------------------------------------------*/
+
+ /**
+ * Creates an array of the enumerable property names of the array-like `value`.
+ *
+ * @private
+ * @param {*} value The value to query.
+ * @param {boolean} inherited Specify returning inherited property names.
+ * @returns {Array} Returns the array of property names.
+ */
+ function arrayLikeKeys(value, inherited) {
+ var isArr = isArray(value),
+ isArg = !isArr && isArguments(value),
+ isBuff = !isArr && !isArg && isBuffer(value),
+ isType = !isArr && !isArg && !isBuff && isTypedArray(value),
+ skipIndexes = isArr || isArg || isBuff || isType,
+ result = skipIndexes ? baseTimes(value.length, String) : [],
+ length = result.length;
+
+ for (var key in value) {
+ if ((inherited || hasOwnProperty.call(value, key)) &&
+ !(skipIndexes && (
+ // Safari 9 has enumerable `arguments.length` in strict mode.
+ key == 'length' ||
+ // Node.js 0.10 has enumerable non-index properties on buffers.
+ (isBuff && (key == 'offset' || key == 'parent')) ||
+ // PhantomJS 2 has enumerable non-index properties on typed arrays.
+ (isType && (key == 'buffer' || key == 'byteLength' || key == 'byteOffset')) ||
+ // Skip index properties.
+ isIndex(key, length)
+ ))) {
+ result.push(key);
}
- touchtime = now;
- } else if (touches.length > 1) {
- var p = touches[0], q = touches[1],
- dx = p[0] - q[0], dy = p[1] - q[1];
- distance0 = dx * dx + dy * dy;
}
+ return result;
}
- function moved() {
- var touches = d3.touches(that),
- p0, l0,
- p1, l1;
+ /**
+ * A specialized version of `_.sample` for arrays.
+ *
+ * @private
+ * @param {Array} array The array to sample.
+ * @returns {*} Returns the random element.
+ */
+ function arraySample(array) {
+ var length = array.length;
+ return length ? array[baseRandom(0, length - 1)] : undefined;
+ }
- d3_selection_interrupt.call(that);
+ /**
+ * A specialized version of `_.sampleSize` for arrays.
+ *
+ * @private
+ * @param {Array} array The array to sample.
+ * @param {number} n The number of elements to sample.
+ * @returns {Array} Returns the random elements.
+ */
+ function arraySampleSize(array, n) {
+ return shuffleSelf(copyArray(array), baseClamp(n, 0, array.length));
+ }
- for (var i = 0, n = touches.length; i < n; ++i, l1 = null) {
- p1 = touches[i];
- if (l1 = locations0[p1.identifier]) {
- if (l0) break;
- p0 = p1, l0 = l1;
- }
- }
+ /**
+ * A specialized version of `_.shuffle` for arrays.
+ *
+ * @private
+ * @param {Array} array The array to shuffle.
+ * @returns {Array} Returns the new shuffled array.
+ */
+ function arrayShuffle(array) {
+ return shuffleSelf(copyArray(array));
+ }
- if (l1) {
- var distance1 = (distance1 = p1[0] - p0[0]) * distance1 + (distance1 = p1[1] - p0[1]) * distance1,
- scale1 = distance0 && Math.sqrt(distance1 / distance0);
- p0 = [(p0[0] + p1[0]) / 2, (p0[1] + p1[1]) / 2];
- l0 = [(l0[0] + l1[0]) / 2, (l0[1] + l1[1]) / 2];
- scaleTo(scale1 * scale0);
+ /**
+ * This function is like `assignValue` except that it doesn't assign
+ * `undefined` values.
+ *
+ * @private
+ * @param {Object} object The object to modify.
+ * @param {string} key The key of the property to assign.
+ * @param {*} value The value to assign.
+ */
+ function assignMergeValue(object, key, value) {
+ if ((value !== undefined && !eq(object[key], value)) ||
+ (value === undefined && !(key in object))) {
+ baseAssignValue(object, key, value);
}
+ }
- touchtime = null;
- translateTo(p0, l0);
- zoomed(dispatch);
+ /**
+ * Assigns `value` to `key` of `object` if the existing value is not equivalent
+ * using [`SameValueZero`](http://ecma-international.org/ecma-262/7.0/#sec-samevaluezero)
+ * for equality comparisons.
+ *
+ * @private
+ * @param {Object} object The object to modify.
+ * @param {string} key The key of the property to assign.
+ * @param {*} value The value to assign.
+ */
+ function assignValue(object, key, value) {
+ var objValue = object[key];
+ if (!(hasOwnProperty.call(object, key) && eq(objValue, value)) ||
+ (value === undefined && !(key in object))) {
+ baseAssignValue(object, key, value);
+ }
}
- function ended() {
- // If there are any globally-active touches remaining, remove the ended
- // touches from locations0.
- if (d3.event.touches.length) {
- var changed = d3.event.changedTouches;
- for (var i = 0, n = changed.length; i < n; ++i) {
- delete locations0[changed[i].identifier];
- }
- // If locations0 is not empty, then relocate and continue listening for
- // touchmove and touchend.
- for (var identifier in locations0) {
- return void relocate(); // locations may have detached due to rotation
+ /**
+ * Gets the index at which the `key` is found in `array` of key-value pairs.
+ *
+ * @private
+ * @param {Array} array The array to inspect.
+ * @param {*} key The key to search for.
+ * @returns {number} Returns the index of the matched value, else `-1`.
+ */
+ function assocIndexOf(array, key) {
+ var length = array.length;
+ while (length--) {
+ if (eq(array[length][0], key)) {
+ return length;
}
}
- // Otherwise, remove touchmove and touchend listeners.
- d3.selectAll(targets).on(zoomName, null);
- subject.on(mousedown, mousedowned).on(touchstart, touchstarted);
- dragRestore();
- zoomended(dispatch);
+ return -1;
}
- }
-
- function mousewheeled() {
- var dispatch = event.of(this, arguments);
- if (mousewheelTimer) clearTimeout(mousewheelTimer);
- else translate0 = location(center0 = center || d3.mouse(this)), d3_selection_interrupt.call(this), zoomstarted(dispatch);
- mousewheelTimer = setTimeout(function() { mousewheelTimer = null; zoomended(dispatch); }, 50);
- d3_eventPreventDefault();
- scaleTo(Math.pow(2, d3_behavior_zoomDelta() * .002) * view.k);
- translateTo(center0, translate0);
- zoomed(dispatch);
- }
- function dblclicked() {
- var p = d3.mouse(this),
- k = Math.log(view.k) / Math.LN2;
+ /**
+ * Aggregates elements of `collection` on `accumulator` with keys transformed
+ * by `iteratee` and values set by `setter`.
+ *
+ * @private
+ * @param {Array|Object} collection The collection to iterate over.
+ * @param {Function} setter The function to set `accumulator` values.
+ * @param {Function} iteratee The iteratee to transform keys.
+ * @param {Object} accumulator The initial aggregated object.
+ * @returns {Function} Returns `accumulator`.
+ */
+ function baseAggregator(collection, setter, iteratee, accumulator) {
+ baseEach(collection, function(value, key, collection) {
+ setter(accumulator, value, iteratee(value), collection);
+ });
+ return accumulator;
+ }
- zoomTo(this, p, location(p), d3.event.shiftKey ? Math.ceil(k) - 1 : Math.floor(k) + 1);
- }
+ /**
+ * The base implementation of `_.assign` without support for multiple sources
+ * or `customizer` functions.
+ *
+ * @private
+ * @param {Object} object The destination object.
+ * @param {Object} source The source object.
+ * @returns {Object} Returns `object`.
+ */
+ function baseAssign(object, source) {
+ return object && copyObject(source, keys(source), object);
+ }
- return d3.rebind(zoom, event, "on");
-};
+ /**
+ * The base implementation of `_.assignIn` without support for multiple sources
+ * or `customizer` functions.
+ *
+ * @private
+ * @param {Object} object The destination object.
+ * @param {Object} source The source object.
+ * @returns {Object} Returns `object`.
+ */
+ function baseAssignIn(object, source) {
+ return object && copyObject(source, keysIn(source), object);
+ }
-var d3_behavior_zoomInfinity = [0, Infinity], // default scale extent
- d3_behavior_zoomDelta, // initialized lazily
- d3_behavior_zoomWheel;
-function d3_functor(v) {
- return typeof v === "function" ? v : function() { return v; };
-}
+ /**
+ * The base implementation of `assignValue` and `assignMergeValue` without
+ * value checks.
+ *
+ * @private
+ * @param {Object} object The object to modify.
+ * @param {string} key The key of the property to assign.
+ * @param {*} value The value to assign.
+ */
+ function baseAssignValue(object, key, value) {
+ if (key == '__proto__' && defineProperty) {
+ defineProperty(object, key, {
+ 'configurable': true,
+ 'enumerable': true,
+ 'value': value,
+ 'writable': true
+ });
+ } else {
+ object[key] = value;
+ }
+ }
-d3.functor = d3_functor;
+ /**
+ * The base implementation of `_.at` without support for individual paths.
+ *
+ * @private
+ * @param {Object} object The object to iterate over.
+ * @param {string[]} paths The property paths to pick.
+ * @returns {Array} Returns the picked elements.
+ */
+ function baseAt(object, paths) {
+ var index = -1,
+ length = paths.length,
+ result = Array(length),
+ skip = object == null;
-d3.touch = function(container, touches, identifier) {
- if (arguments.length < 3) identifier = touches, touches = d3_eventSource().changedTouches;
- if (touches) for (var i = 0, n = touches.length, touch; i < n; ++i) {
- if ((touch = touches[i]).identifier === identifier) {
- return d3_mousePoint(container, touch);
+ while (++index < length) {
+ result[index] = skip ? undefined : get(object, paths[index]);
+ }
+ return result;
}
- }
-};
-
-var d3_timer_queueHead,
- d3_timer_queueTail,
- d3_timer_interval, // is an interval (or frame) active?
- d3_timer_timeout, // is a timeout active?
- d3_timer_active, // active timer object
- d3_timer_frame = this[d3_vendorSymbol(this, "requestAnimationFrame")] || function(callback) { setTimeout(callback, 17); };
-// The timer will continue to fire until callback returns true.
-d3.timer = function(callback, delay, then) {
- var n = arguments.length;
- if (n < 2) delay = 0;
- if (n < 3) then = Date.now();
+ /**
+ * The base implementation of `_.clamp` which doesn't coerce arguments.
+ *
+ * @private
+ * @param {number} number The number to clamp.
+ * @param {number} [lower] The lower bound.
+ * @param {number} upper The upper bound.
+ * @returns {number} Returns the clamped number.
+ */
+ function baseClamp(number, lower, upper) {
+ if (number === number) {
+ if (upper !== undefined) {
+ number = number <= upper ? number : upper;
+ }
+ if (lower !== undefined) {
+ number = number >= lower ? number : lower;
+ }
+ }
+ return number;
+ }
- // Add the callback to the tail of the queue.
- var time = then + delay, timer = {c: callback, t: time, f: false, n: null};
- if (d3_timer_queueTail) d3_timer_queueTail.n = timer;
- else d3_timer_queueHead = timer;
- d3_timer_queueTail = timer;
+ /**
+ * The base implementation of `_.clone` and `_.cloneDeep` which tracks
+ * traversed objects.
+ *
+ * @private
+ * @param {*} value The value to clone.
+ * @param {boolean} bitmask The bitmask flags.
+ * 1 - Deep clone
+ * 2 - Flatten inherited properties
+ * 4 - Clone symbols
+ * @param {Function} [customizer] The function to customize cloning.
+ * @param {string} [key] The key of `value`.
+ * @param {Object} [object] The parent object of `value`.
+ * @param {Object} [stack] Tracks traversed objects and their clone counterparts.
+ * @returns {*} Returns the cloned value.
+ */
+ function baseClone(value, bitmask, customizer, key, object, stack) {
+ var result,
+ isDeep = bitmask & CLONE_DEEP_FLAG,
+ isFlat = bitmask & CLONE_FLAT_FLAG,
+ isFull = bitmask & CLONE_SYMBOLS_FLAG;
+
+ if (customizer) {
+ result = object ? customizer(value, key, object, stack) : customizer(value);
+ }
+ if (result !== undefined) {
+ return result;
+ }
+ if (!isObject(value)) {
+ return value;
+ }
+ var isArr = isArray(value);
+ if (isArr) {
+ result = initCloneArray(value);
+ if (!isDeep) {
+ return copyArray(value, result);
+ }
+ } else {
+ var tag = getTag(value),
+ isFunc = tag == funcTag || tag == genTag;
+
+ if (isBuffer(value)) {
+ return cloneBuffer(value, isDeep);
+ }
+ if (tag == objectTag || tag == argsTag || (isFunc && !object)) {
+ result = (isFlat || isFunc) ? {} : initCloneObject(value);
+ if (!isDeep) {
+ return isFlat
+ ? copySymbolsIn(value, baseAssignIn(result, value))
+ : copySymbols(value, baseAssign(result, value));
+ }
+ } else {
+ if (!cloneableTags[tag]) {
+ return object ? value : {};
+ }
+ result = initCloneByTag(value, tag, baseClone, isDeep);
+ }
+ }
+ // Check for circular references and return its corresponding clone.
+ stack || (stack = new Stack);
+ var stacked = stack.get(value);
+ if (stacked) {
+ return stacked;
+ }
+ stack.set(value, result);
- // Start animatin'!
- if (!d3_timer_interval) {
- d3_timer_timeout = clearTimeout(d3_timer_timeout);
- d3_timer_interval = 1;
- d3_timer_frame(d3_timer_step);
- }
-};
+ var keysFunc = isFull
+ ? (isFlat ? getAllKeysIn : getAllKeys)
+ : (isFlat ? keysIn : keys);
-function d3_timer_step() {
- var now = d3_timer_mark(),
- delay = d3_timer_sweep() - now;
- if (delay > 24) {
- if (isFinite(delay)) {
- clearTimeout(d3_timer_timeout);
- d3_timer_timeout = setTimeout(d3_timer_step, delay);
+ var props = isArr ? undefined : keysFunc(value);
+ arrayEach(props || value, function(subValue, key) {
+ if (props) {
+ key = subValue;
+ subValue = value[key];
+ }
+ // Recursively populate clone (susceptible to call stack limits).
+ assignValue(result, key, baseClone(subValue, bitmask, customizer, key, value, stack));
+ });
+ return result;
}
- d3_timer_interval = 0;
- } else {
- d3_timer_interval = 1;
- d3_timer_frame(d3_timer_step);
- }
-}
-
-d3.timer.flush = function() {
- d3_timer_mark();
- d3_timer_sweep();
-};
-function d3_timer_mark() {
- var now = Date.now();
- d3_timer_active = d3_timer_queueHead;
- while (d3_timer_active) {
- if (now >= d3_timer_active.t) d3_timer_active.f = d3_timer_active.c(now - d3_timer_active.t);
- d3_timer_active = d3_timer_active.n;
- }
- return now;
-}
-
-// Flush after callbacks to avoid concurrent queue modification.
-// Returns the time of the earliest active timer, post-sweep.
-function d3_timer_sweep() {
- var t0,
- t1 = d3_timer_queueHead,
- time = Infinity;
- while (t1) {
- if (t1.f) {
- t1 = t0 ? t0.n = t1.n : d3_timer_queueHead = t1.n;
- } else {
- if (t1.t < time) time = t1.t;
- t1 = (t0 = t1).n;
+ /**
+ * The base implementation of `_.conforms` which doesn't clone `source`.
+ *
+ * @private
+ * @param {Object} source The object of property predicates to conform to.
+ * @returns {Function} Returns the new spec function.
+ */
+ function baseConforms(source) {
+ var props = keys(source);
+ return function(object) {
+ return baseConformsTo(object, source, props);
+ };
}
- }
- d3_timer_queueTail = t0;
- return time;
-}
-d3.geo = {};
-
-d3.geo.stream = function(object, listener) {
- if (object && d3_geo_streamObjectType.hasOwnProperty(object.type)) {
- d3_geo_streamObjectType[object.type](object, listener);
- } else {
- d3_geo_streamGeometry(object, listener);
- }
-};
-function d3_geo_streamGeometry(geometry, listener) {
- if (geometry && d3_geo_streamGeometryType.hasOwnProperty(geometry.type)) {
- d3_geo_streamGeometryType[geometry.type](geometry, listener);
- }
-}
-
-var d3_geo_streamObjectType = {
- Feature: function(feature, listener) {
- d3_geo_streamGeometry(feature.geometry, listener);
- },
- FeatureCollection: function(object, listener) {
- var features = object.features, i = -1, n = features.length;
- while (++i < n) d3_geo_streamGeometry(features[i].geometry, listener);
- }
-};
-
-var d3_geo_streamGeometryType = {
- Sphere: function(object, listener) {
- listener.sphere();
- },
- Point: function(object, listener) {
- object = object.coordinates;
- listener.point(object[0], object[1], object[2]);
- },
- MultiPoint: function(object, listener) {
- var coordinates = object.coordinates, i = -1, n = coordinates.length;
- while (++i < n) object = coordinates[i], listener.point(object[0], object[1], object[2]);
- },
- LineString: function(object, listener) {
- d3_geo_streamLine(object.coordinates, listener, 0);
- },
- MultiLineString: function(object, listener) {
- var coordinates = object.coordinates, i = -1, n = coordinates.length;
- while (++i < n) d3_geo_streamLine(coordinates[i], listener, 0);
- },
- Polygon: function(object, listener) {
- d3_geo_streamPolygon(object.coordinates, listener);
- },
- MultiPolygon: function(object, listener) {
- var coordinates = object.coordinates, i = -1, n = coordinates.length;
- while (++i < n) d3_geo_streamPolygon(coordinates[i], listener);
- },
- GeometryCollection: function(object, listener) {
- var geometries = object.geometries, i = -1, n = geometries.length;
- while (++i < n) d3_geo_streamGeometry(geometries[i], listener);
- }
-};
+ /**
+ * The base implementation of `_.conformsTo` which accepts `props` to check.
+ *
+ * @private
+ * @param {Object} object The object to inspect.
+ * @param {Object} source The object of property predicates to conform to.
+ * @returns {boolean} Returns `true` if `object` conforms, else `false`.
+ */
+ function baseConformsTo(object, source, props) {
+ var length = props.length;
+ if (object == null) {
+ return !length;
+ }
+ object = Object(object);
+ while (length--) {
+ var key = props[length],
+ predicate = source[key],
+ value = object[key];
-function d3_geo_streamLine(coordinates, listener, closed) {
- var i = -1, n = coordinates.length - closed, coordinate;
- listener.lineStart();
- while (++i < n) coordinate = coordinates[i], listener.point(coordinate[0], coordinate[1], coordinate[2]);
- listener.lineEnd();
-}
+ if ((value === undefined && !(key in object)) || !predicate(value)) {
+ return false;
+ }
+ }
+ return true;
+ }
-function d3_geo_streamPolygon(coordinates, listener) {
- var i = -1, n = coordinates.length;
- listener.polygonStart();
- while (++i < n) d3_geo_streamLine(coordinates[i], listener, 1);
- listener.polygonEnd();
-}
+ /**
+ * The base implementation of `_.delay` and `_.defer` which accepts `args`
+ * to provide to `func`.
+ *
+ * @private
+ * @param {Function} func The function to delay.
+ * @param {number} wait The number of milliseconds to delay invocation.
+ * @param {Array} args The arguments to provide to `func`.
+ * @returns {number|Object} Returns the timer id or timeout object.
+ */
+ function baseDelay(func, wait, args) {
+ if (typeof func != 'function') {
+ throw new TypeError(FUNC_ERROR_TEXT);
+ }
+ return setTimeout(function() { func.apply(undefined, args); }, wait);
+ }
-d3.geo.length = function(object) {
- d3_geo_lengthSum = 0;
- d3.geo.stream(object, d3_geo_length);
- return d3_geo_lengthSum;
-};
+ /**
+ * The base implementation of methods like `_.difference` without support
+ * for excluding multiple arrays or iteratee shorthands.
+ *
+ * @private
+ * @param {Array} array The array to inspect.
+ * @param {Array} values The values to exclude.
+ * @param {Function} [iteratee] The iteratee invoked per element.
+ * @param {Function} [comparator] The comparator invoked per element.
+ * @returns {Array} Returns the new array of filtered values.
+ */
+ function baseDifference(array, values, iteratee, comparator) {
+ var index = -1,
+ includes = arrayIncludes,
+ isCommon = true,
+ length = array.length,
+ result = [],
+ valuesLength = values.length;
-var d3_geo_lengthSum;
+ if (!length) {
+ return result;
+ }
+ if (iteratee) {
+ values = arrayMap(values, baseUnary(iteratee));
+ }
+ if (comparator) {
+ includes = arrayIncludesWith;
+ isCommon = false;
+ }
+ else if (values.length >= LARGE_ARRAY_SIZE) {
+ includes = cacheHas;
+ isCommon = false;
+ values = new SetCache(values);
+ }
+ outer:
+ while (++index < length) {
+ var value = array[index],
+ computed = iteratee == null ? value : iteratee(value);
+
+ value = (comparator || value !== 0) ? value : 0;
+ if (isCommon && computed === computed) {
+ var valuesIndex = valuesLength;
+ while (valuesIndex--) {
+ if (values[valuesIndex] === computed) {
+ continue outer;
+ }
+ }
+ result.push(value);
+ }
+ else if (!includes(values, computed, comparator)) {
+ result.push(value);
+ }
+ }
+ return result;
+ }
-var d3_geo_length = {
- sphere: d3_noop,
- point: d3_noop,
- lineStart: d3_geo_lengthLineStart,
- lineEnd: d3_noop,
- polygonStart: d3_noop,
- polygonEnd: d3_noop
-};
+ /**
+ * The base implementation of `_.forEach` without support for iteratee shorthands.
+ *
+ * @private
+ * @param {Array|Object} collection The collection to iterate over.
+ * @param {Function} iteratee The function invoked per iteration.
+ * @returns {Array|Object} Returns `collection`.
+ */
+ var baseEach = createBaseEach(baseForOwn);
-function d3_geo_lengthLineStart() {
- var λ0, sinÏ0, cosÏ0;
+ /**
+ * The base implementation of `_.forEachRight` without support for iteratee shorthands.
+ *
+ * @private
+ * @param {Array|Object} collection The collection to iterate over.
+ * @param {Function} iteratee The function invoked per iteration.
+ * @returns {Array|Object} Returns `collection`.
+ */
+ var baseEachRight = createBaseEach(baseForOwnRight, true);
- d3_geo_length.point = function(λ, Ï) {
- λ0 = λ * d3_radians, sinÏ0 = Math.sin(Ï *= d3_radians), cosÏ0 = Math.cos(Ï);
- d3_geo_length.point = nextPoint;
- };
+ /**
+ * The base implementation of `_.every` without support for iteratee shorthands.
+ *
+ * @private
+ * @param {Array|Object} collection The collection to iterate over.
+ * @param {Function} predicate The function invoked per iteration.
+ * @returns {boolean} Returns `true` if all elements pass the predicate check,
+ * else `false`
+ */
+ function baseEvery(collection, predicate) {
+ var result = true;
+ baseEach(collection, function(value, index, collection) {
+ result = !!predicate(value, index, collection);
+ return result;
+ });
+ return result;
+ }
- d3_geo_length.lineEnd = function() {
- d3_geo_length.point = d3_geo_length.lineEnd = d3_noop;
- };
+ /**
+ * The base implementation of methods like `_.max` and `_.min` which accepts a
+ * `comparator` to determine the extremum value.
+ *
+ * @private
+ * @param {Array} array The array to iterate over.
+ * @param {Function} iteratee The iteratee invoked per iteration.
+ * @param {Function} comparator The comparator used to compare values.
+ * @returns {*} Returns the extremum value.
+ */
+ function baseExtremum(array, iteratee, comparator) {
+ var index = -1,
+ length = array.length;
- function nextPoint(λ, Ï) {
- var sinÏ = Math.sin(Ï *= d3_radians),
- cosÏ = Math.cos(Ï),
- t = abs((λ *= d3_radians) - λ0),
- cosÎλ = Math.cos(t);
- d3_geo_lengthSum += Math.atan2(Math.sqrt((t = cosÏ * Math.sin(t)) * t + (t = cosÏ0 * sinÏ - sinÏ0 * cosÏ * cosÎλ) * t), sinÏ0 * sinÏ + cosÏ0 * cosÏ * cosÎλ);
- λ0 = λ, sinÏ0 = sinÏ, cosÏ0 = cosÏ;
- }
-}
-function d3_identity(d) {
- return d;
-}
-function d3_true() {
- return true;
-}
+ while (++index < length) {
+ var value = array[index],
+ current = iteratee(value);
-function d3_geo_spherical(cartesian) {
- return [
- Math.atan2(cartesian[1], cartesian[0]),
- d3_asin(cartesian[2])
- ];
-}
+ if (current != null && (computed === undefined
+ ? (current === current && !isSymbol(current))
+ : comparator(current, computed)
+ )) {
+ var computed = current,
+ result = value;
+ }
+ }
+ return result;
+ }
-function d3_geo_sphericalEqual(a, b) {
- return abs(a[0] - b[0]) < ε && abs(a[1] - b[1]) < ε;
-}
+ /**
+ * The base implementation of `_.fill` without an iteratee call guard.
+ *
+ * @private
+ * @param {Array} array The array to fill.
+ * @param {*} value The value to fill `array` with.
+ * @param {number} [start=0] The start position.
+ * @param {number} [end=array.length] The end position.
+ * @returns {Array} Returns `array`.
+ */
+ function baseFill(array, value, start, end) {
+ var length = array.length;
-// General spherical polygon clipping algorithm: takes a polygon, cuts it into
-// visible line segments and rejoins the segments by interpolating along the
-// clip edge.
-function d3_geo_clipPolygon(segments, compare, clipStartInside, interpolate, listener) {
- var subject = [],
- clip = [];
+ start = toInteger(start);
+ if (start < 0) {
+ start = -start > length ? 0 : (length + start);
+ }
+ end = (end === undefined || end > length) ? length : toInteger(end);
+ if (end < 0) {
+ end += length;
+ }
+ end = start > end ? 0 : toLength(end);
+ while (start < end) {
+ array[start++] = value;
+ }
+ return array;
+ }
- segments.forEach(function(segment) {
- if ((n = segment.length - 1) <= 0) return;
- var n, p0 = segment[0], p1 = segment[n];
-
- // If the first and last points of a segment are coincident, then treat as
- // a closed ring.
- // TODO if all rings are closed, then the winding order of the exterior
- // ring should be checked.
- if (d3_geo_sphericalEqual(p0, p1)) {
- listener.lineStart();
- for (var i = 0; i < n; ++i) listener.point((p0 = segment[i])[0], p0[1]);
- listener.lineEnd();
- return;
+ /**
+ * The base implementation of `_.filter` without support for iteratee shorthands.
+ *
+ * @private
+ * @param {Array|Object} collection The collection to iterate over.
+ * @param {Function} predicate The function invoked per iteration.
+ * @returns {Array} Returns the new filtered array.
+ */
+ function baseFilter(collection, predicate) {
+ var result = [];
+ baseEach(collection, function(value, index, collection) {
+ if (predicate(value, index, collection)) {
+ result.push(value);
+ }
+ });
+ return result;
}
- var a = new d3_geo_clipPolygonIntersection(p0, segment, null, true),
- b = new d3_geo_clipPolygonIntersection(p0, null, a, false);
- a.o = b;
- subject.push(a);
- clip.push(b);
- a = new d3_geo_clipPolygonIntersection(p1, segment, null, false);
- b = new d3_geo_clipPolygonIntersection(p1, null, a, true);
- a.o = b;
- subject.push(a);
- clip.push(b);
- });
- clip.sort(compare);
- d3_geo_clipPolygonLinkCircular(subject);
- d3_geo_clipPolygonLinkCircular(clip);
- if (!subject.length) return;
+ /**
+ * The base implementation of `_.flatten` with support for restricting flattening.
+ *
+ * @private
+ * @param {Array} array The array to flatten.
+ * @param {number} depth The maximum recursion depth.
+ * @param {boolean} [predicate=isFlattenable] The function invoked per iteration.
+ * @param {boolean} [isStrict] Restrict to values that pass `predicate` checks.
+ * @param {Array} [result=[]] The initial result value.
+ * @returns {Array} Returns the new flattened array.
+ */
+ function baseFlatten(array, depth, predicate, isStrict, result) {
+ var index = -1,
+ length = array.length;
- for (var i = 0, entry = clipStartInside, n = clip.length; i < n; ++i) {
- clip[i].e = entry = !entry;
- }
+ predicate || (predicate = isFlattenable);
+ result || (result = []);
- var start = subject[0],
- points,
- point;
- while (1) {
- // Find first unvisited intersection.
- var current = start,
- isSubject = true;
- while (current.v) if ((current = current.n) === start) return;
- points = current.z;
- listener.lineStart();
- do {
- current.v = current.o.v = true;
- if (current.e) {
- if (isSubject) {
- for (var i = 0, n = points.length; i < n; ++i) listener.point((point = points[i])[0], point[1]);
- } else {
- interpolate(current.x, current.n.x, 1, listener);
- }
- current = current.n;
- } else {
- if (isSubject) {
- points = current.p.z;
- for (var i = points.length - 1; i >= 0; --i) listener.point((point = points[i])[0], point[1]);
- } else {
- interpolate(current.x, current.p.x, -1, listener);
+ while (++index < length) {
+ var value = array[index];
+ if (depth > 0 && predicate(value)) {
+ if (depth > 1) {
+ // Recursively flatten arrays (susceptible to call stack limits).
+ baseFlatten(value, depth - 1, predicate, isStrict, result);
+ } else {
+ arrayPush(result, value);
+ }
+ } else if (!isStrict) {
+ result[result.length] = value;
}
- current = current.p;
}
- current = current.o;
- points = current.z;
- isSubject = !isSubject;
- } while (!current.v);
- listener.lineEnd();
- }
-}
-
-function d3_geo_clipPolygonLinkCircular(array) {
- if (!(n = array.length)) return;
- var n,
- i = 0,
- a = array[0],
- b;
- while (++i < n) {
- a.n = b = array[i];
- b.p = a;
- a = b;
- }
- a.n = b = array[0];
- b.p = a;
-}
-
-function d3_geo_clipPolygonIntersection(point, points, other, entry) {
- this.x = point;
- this.z = points;
- this.o = other; // another intersection
- this.e = entry; // is an entry?
- this.v = false; // visited
- this.n = this.p = null; // next & previous
-}
+ return result;
+ }
-function d3_geo_clip(pointVisible, clipLine, interpolate, clipStart) {
- return function(rotate, listener) {
- var line = clipLine(listener),
- rotatedClipStart = rotate.invert(clipStart[0], clipStart[1]);
+ /**
+ * The base implementation of `baseForOwn` which iterates over `object`
+ * properties returned by `keysFunc` and invokes `iteratee` for each property.
+ * Iteratee functions may exit iteration early by explicitly returning `false`.
+ *
+ * @private
+ * @param {Object} object The object to iterate over.
+ * @param {Function} iteratee The function invoked per iteration.
+ * @param {Function} keysFunc The function to get the keys of `object`.
+ * @returns {Object} Returns `object`.
+ */
+ var baseFor = createBaseFor();
- var clip = {
- point: point,
- lineStart: lineStart,
- lineEnd: lineEnd,
- polygonStart: function() {
- clip.point = pointRing;
- clip.lineStart = ringStart;
- clip.lineEnd = ringEnd;
- segments = [];
- polygon = [];
- },
- polygonEnd: function() {
- clip.point = point;
- clip.lineStart = lineStart;
- clip.lineEnd = lineEnd;
+ /**
+ * This function is like `baseFor` except that it iterates over properties
+ * in the opposite order.
+ *
+ * @private
+ * @param {Object} object The object to iterate over.
+ * @param {Function} iteratee The function invoked per iteration.
+ * @param {Function} keysFunc The function to get the keys of `object`.
+ * @returns {Object} Returns `object`.
+ */
+ var baseForRight = createBaseFor(true);
- segments = d3.merge(segments);
- var clipStartInside = d3_geo_pointInPolygon(rotatedClipStart, polygon);
- if (segments.length) {
- if (!polygonStarted) listener.polygonStart(), polygonStarted = true;
- d3_geo_clipPolygon(segments, d3_geo_clipSort, clipStartInside, interpolate, listener);
- } else if (clipStartInside) {
- if (!polygonStarted) listener.polygonStart(), polygonStarted = true;
- listener.lineStart();
- interpolate(null, null, 1, listener);
- listener.lineEnd();
- }
- if (polygonStarted) listener.polygonEnd(), polygonStarted = false;
- segments = polygon = null;
- },
- sphere: function() {
- listener.polygonStart();
- listener.lineStart();
- interpolate(null, null, 1, listener);
- listener.lineEnd();
- listener.polygonEnd();
- }
- };
+ /**
+ * The base implementation of `_.forOwn` without support for iteratee shorthands.
+ *
+ * @private
+ * @param {Object} object The object to iterate over.
+ * @param {Function} iteratee The function invoked per iteration.
+ * @returns {Object} Returns `object`.
+ */
+ function baseForOwn(object, iteratee) {
+ return object && baseFor(object, iteratee, keys);
+ }
- function point(λ, Ï) {
- var point = rotate(λ, Ï);
- if (pointVisible(λ = point[0], Ï = point[1])) listener.point(λ, Ï);
+ /**
+ * The base implementation of `_.forOwnRight` without support for iteratee shorthands.
+ *
+ * @private
+ * @param {Object} object The object to iterate over.
+ * @param {Function} iteratee The function invoked per iteration.
+ * @returns {Object} Returns `object`.
+ */
+ function baseForOwnRight(object, iteratee) {
+ return object && baseForRight(object, iteratee, keys);
}
- function pointLine(λ, Ï) {
- var point = rotate(λ, Ï);
- line.point(point[0], point[1]);
+
+ /**
+ * The base implementation of `_.functions` which creates an array of
+ * `object` function property names filtered from `props`.
+ *
+ * @private
+ * @param {Object} object The object to inspect.
+ * @param {Array} props The property names to filter.
+ * @returns {Array} Returns the function names.
+ */
+ function baseFunctions(object, props) {
+ return arrayFilter(props, function(key) {
+ return isFunction(object[key]);
+ });
}
- function lineStart() { clip.point = pointLine; line.lineStart(); }
- function lineEnd() { clip.point = point; line.lineEnd(); }
- var segments;
+ /**
+ * The base implementation of `_.get` without support for default values.
+ *
+ * @private
+ * @param {Object} object The object to query.
+ * @param {Array|string} path The path of the property to get.
+ * @returns {*} Returns the resolved value.
+ */
+ function baseGet(object, path) {
+ path = castPath(path, object);
- var buffer = d3_geo_clipBufferListener(),
- ringListener = clipLine(buffer),
- polygonStarted = false,
- polygon,
- ring;
+ var index = 0,
+ length = path.length;
- function pointRing(λ, Ï) {
- ring.push([λ, Ï]);
- var point = rotate(λ, Ï);
- ringListener.point(point[0], point[1]);
+ while (object != null && index < length) {
+ object = object[toKey(path[index++])];
+ }
+ return (index && index == length) ? object : undefined;
}
- function ringStart() {
- ringListener.lineStart();
- ring = [];
+ /**
+ * The base implementation of `getAllKeys` and `getAllKeysIn` which uses
+ * `keysFunc` and `symbolsFunc` to get the enumerable property names and
+ * symbols of `object`.
+ *
+ * @private
+ * @param {Object} object The object to query.
+ * @param {Function} keysFunc The function to get the keys of `object`.
+ * @param {Function} symbolsFunc The function to get the symbols of `object`.
+ * @returns {Array} Returns the array of property names and symbols.
+ */
+ function baseGetAllKeys(object, keysFunc, symbolsFunc) {
+ var result = keysFunc(object);
+ return isArray(object) ? result : arrayPush(result, symbolsFunc(object));
}
- function ringEnd() {
- pointRing(ring[0][0], ring[0][1]);
- ringListener.lineEnd();
-
- var clean = ringListener.clean(),
- ringSegments = buffer.buffer(),
- segment,
- n = ringSegments.length;
+ /**
+ * The base implementation of `getTag` without fallbacks for buggy environments.
+ *
+ * @private
+ * @param {*} value The value to query.
+ * @returns {string} Returns the `toStringTag`.
+ */
+ function baseGetTag(value) {
+ if (value == null) {
+ return value === undefined ? undefinedTag : nullTag;
+ }
+ return (symToStringTag && symToStringTag in Object(value))
+ ? getRawTag(value)
+ : objectToString(value);
+ }
- ring.pop();
- polygon.push(ring);
- ring = null;
+ /**
+ * The base implementation of `_.gt` which doesn't coerce arguments.
+ *
+ * @private
+ * @param {*} value The value to compare.
+ * @param {*} other The other value to compare.
+ * @returns {boolean} Returns `true` if `value` is greater than `other`,
+ * else `false`.
+ */
+ function baseGt(value, other) {
+ return value > other;
+ }
- if (!n) return;
+ /**
+ * The base implementation of `_.has` without support for deep paths.
+ *
+ * @private
+ * @param {Object} [object] The object to query.
+ * @param {Array|string} key The key to check.
+ * @returns {boolean} Returns `true` if `key` exists, else `false`.
+ */
+ function baseHas(object, key) {
+ return object != null && hasOwnProperty.call(object, key);
+ }
- // No intersections.
- if (clean & 1) {
- segment = ringSegments[0];
- var n = segment.length - 1,
- i = -1,
- point;
- if (n > 0) {
- if (!polygonStarted) listener.polygonStart(), polygonStarted = true;
- listener.lineStart();
- while (++i < n) listener.point((point = segment[i])[0], point[1]);
- listener.lineEnd();
+ /**
+ * The base implementation of `_.hasIn` without support for deep paths.
+ *
+ * @private
+ * @param {Object} [object] The object to query.
+ * @param {Array|string} key The key to check.
+ * @returns {boolean} Returns `true` if `key` exists, else `false`.
+ */
+ function baseHasIn(object, key) {
+ return object != null && key in Object(object);
+ }
+
+ /**
+ * The base implementation of `_.inRange` which doesn't coerce arguments.
+ *
+ * @private
+ * @param {number} number The number to check.
+ * @param {number} start The start of the range.
+ * @param {number} end The end of the range.
+ * @returns {boolean} Returns `true` if `number` is in the range, else `false`.
+ */
+ function baseInRange(number, start, end) {
+ return number >= nativeMin(start, end) && number < nativeMax(start, end);
+ }
+
+ /**
+ * The base implementation of methods like `_.intersection`, without support
+ * for iteratee shorthands, that accepts an array of arrays to inspect.
+ *
+ * @private
+ * @param {Array} arrays The arrays to inspect.
+ * @param {Function} [iteratee] The iteratee invoked per element.
+ * @param {Function} [comparator] The comparator invoked per element.
+ * @returns {Array} Returns the new array of shared values.
+ */
+ function baseIntersection(arrays, iteratee, comparator) {
+ var includes = comparator ? arrayIncludesWith : arrayIncludes,
+ length = arrays[0].length,
+ othLength = arrays.length,
+ othIndex = othLength,
+ caches = Array(othLength),
+ maxLength = Infinity,
+ result = [];
+
+ while (othIndex--) {
+ var array = arrays[othIndex];
+ if (othIndex && iteratee) {
+ array = arrayMap(array, baseUnary(iteratee));
+ }
+ maxLength = nativeMin(array.length, maxLength);
+ caches[othIndex] = !comparator && (iteratee || (length >= 120 && array.length >= 120))
+ ? new SetCache(othIndex && array)
+ : undefined;
+ }
+ array = arrays[0];
+
+ var index = -1,
+ seen = caches[0];
+
+ outer:
+ while (++index < length && result.length < maxLength) {
+ var value = array[index],
+ computed = iteratee ? iteratee(value) : value;
+
+ value = (comparator || value !== 0) ? value : 0;
+ if (!(seen
+ ? cacheHas(seen, computed)
+ : includes(result, computed, comparator)
+ )) {
+ othIndex = othLength;
+ while (--othIndex) {
+ var cache = caches[othIndex];
+ if (!(cache
+ ? cacheHas(cache, computed)
+ : includes(arrays[othIndex], computed, comparator))
+ ) {
+ continue outer;
+ }
+ }
+ if (seen) {
+ seen.push(computed);
+ }
+ result.push(value);
}
- return;
}
+ return result;
+ }
- // Rejoin connected segments.
- // TODO reuse bufferListener.rejoin()?
- if (n > 1 && clean & 2) ringSegments.push(ringSegments.pop().concat(ringSegments.shift()));
+ /**
+ * The base implementation of `_.invert` and `_.invertBy` which inverts
+ * `object` with values transformed by `iteratee` and set by `setter`.
+ *
+ * @private
+ * @param {Object} object The object to iterate over.
+ * @param {Function} setter The function to set `accumulator` values.
+ * @param {Function} iteratee The iteratee to transform values.
+ * @param {Object} accumulator The initial inverted object.
+ * @returns {Function} Returns `accumulator`.
+ */
+ function baseInverter(object, setter, iteratee, accumulator) {
+ baseForOwn(object, function(value, key, object) {
+ setter(accumulator, iteratee(value), key, object);
+ });
+ return accumulator;
+ }
- segments.push(ringSegments.filter(d3_geo_clipSegmentLength1));
+ /**
+ * The base implementation of `_.invoke` without support for individual
+ * method arguments.
+ *
+ * @private
+ * @param {Object} object The object to query.
+ * @param {Array|string} path The path of the method to invoke.
+ * @param {Array} args The arguments to invoke the method with.
+ * @returns {*} Returns the result of the invoked method.
+ */
+ function baseInvoke(object, path, args) {
+ path = castPath(path, object);
+ object = parent(object, path);
+ var func = object == null ? object : object[toKey(last(path))];
+ return func == null ? undefined : apply(func, object, args);
}
- return clip;
- };
-}
+ /**
+ * The base implementation of `_.isArguments`.
+ *
+ * @private
+ * @param {*} value The value to check.
+ * @returns {boolean} Returns `true` if `value` is an `arguments` object,
+ */
+ function baseIsArguments(value) {
+ return isObjectLike(value) && baseGetTag(value) == argsTag;
+ }
-function d3_geo_clipSegmentLength1(segment) {
- return segment.length > 1;
-}
+ /**
+ * The base implementation of `_.isArrayBuffer` without Node.js optimizations.
+ *
+ * @private
+ * @param {*} value The value to check.
+ * @returns {boolean} Returns `true` if `value` is an array buffer, else `false`.
+ */
+ function baseIsArrayBuffer(value) {
+ return isObjectLike(value) && baseGetTag(value) == arrayBufferTag;
+ }
-function d3_geo_clipBufferListener() {
- var lines = [],
- line;
- return {
- lineStart: function() { lines.push(line = []); },
- point: function(λ, Ï) { line.push([λ, Ï]); },
- lineEnd: d3_noop,
- buffer: function() {
- var buffer = lines;
- lines = [];
- line = null;
- return buffer;
- },
- rejoin: function() {
- if (lines.length > 1) lines.push(lines.pop().concat(lines.shift()));
+ /**
+ * The base implementation of `_.isDate` without Node.js optimizations.
+ *
+ * @private
+ * @param {*} value The value to check.
+ * @returns {boolean} Returns `true` if `value` is a date object, else `false`.
+ */
+ function baseIsDate(value) {
+ return isObjectLike(value) && baseGetTag(value) == dateTag;
}
- };
-}
-// Intersection points are sorted along the clip edge. For both antimeridian
-// cutting and circle clipping, the same comparison is used.
-function d3_geo_clipSort(a, b) {
- return ((a = a.x)[0] < 0 ? a[1] - halfÏ - ε : halfÏ - a[1])
- - ((b = b.x)[0] < 0 ? b[1] - halfÏ - ε : halfÏ - b[1]);
-}
+ /**
+ * The base implementation of `_.isEqual` which supports partial comparisons
+ * and tracks traversed objects.
+ *
+ * @private
+ * @param {*} value The value to compare.
+ * @param {*} other The other value to compare.
+ * @param {boolean} bitmask The bitmask flags.
+ * 1 - Unordered comparison
+ * 2 - Partial comparison
+ * @param {Function} [customizer] The function to customize comparisons.
+ * @param {Object} [stack] Tracks traversed `value` and `other` objects.
+ * @returns {boolean} Returns `true` if the values are equivalent, else `false`.
+ */
+ function baseIsEqual(value, other, bitmask, customizer, stack) {
+ if (value === other) {
+ return true;
+ }
+ if (value == null || other == null || (!isObjectLike(value) && !isObjectLike(other))) {
+ return value !== value && other !== other;
+ }
+ return baseIsEqualDeep(value, other, bitmask, customizer, baseIsEqual, stack);
+ }
-var d3_geo_clipAntimeridian = d3_geo_clip(
- d3_true,
- d3_geo_clipAntimeridianLine,
- d3_geo_clipAntimeridianInterpolate,
- [-Ï, -Ï / 2]);
+ /**
+ * A specialized version of `baseIsEqual` for arrays and objects which performs
+ * deep comparisons and tracks traversed objects enabling objects with circular
+ * references to be compared.
+ *
+ * @private
+ * @param {Object} object The object to compare.
+ * @param {Object} other The other object to compare.
+ * @param {number} bitmask The bitmask flags. See `baseIsEqual` for more details.
+ * @param {Function} customizer The function to customize comparisons.
+ * @param {Function} equalFunc The function to determine equivalents of values.
+ * @param {Object} [stack] Tracks traversed `object` and `other` objects.
+ * @returns {boolean} Returns `true` if the objects are equivalent, else `false`.
+ */
+ function baseIsEqualDeep(object, other, bitmask, customizer, equalFunc, stack) {
+ var objIsArr = isArray(object),
+ othIsArr = isArray(other),
+ objTag = objIsArr ? arrayTag : getTag(object),
+ othTag = othIsArr ? arrayTag : getTag(other);
-// Takes a line and cuts into visible segments. Return values:
-// 0: there were intersections or the line was empty.
-// 1: no intersections.
-// 2: there were intersections, and the first and last segments should be
-// rejoined.
-function d3_geo_clipAntimeridianLine(listener) {
- var λ0 = NaN,
- Ï0 = NaN,
- sλ0 = NaN,
- clean; // no intersections
+ objTag = objTag == argsTag ? objectTag : objTag;
+ othTag = othTag == argsTag ? objectTag : othTag;
- return {
- lineStart: function() {
- listener.lineStart();
- clean = 1;
- },
- point: function(λ1, Ï1) {
- var sλ1 = λ1 > 0 ? Ï : -Ï,
- dλ = abs(λ1 - λ0);
- if (abs(dλ - Ï) < ε) { // line crosses a pole
- listener.point(λ0, Ï0 = (Ï0 + Ï1) / 2 > 0 ? halfÏ : -halfÏ);
- listener.point(sλ0, Ï0);
- listener.lineEnd();
- listener.lineStart();
- listener.point(sλ1, Ï0);
- listener.point(λ1, Ï0);
- clean = 0;
- } else if (sλ0 !== sλ1 && dλ >= Ï) { // line crosses antimeridian
- // handle degeneracies
- if (abs(λ0 - sλ0) < ε) λ0 -= sλ0 * ε;
- if (abs(λ1 - sλ1) < ε) λ1 -= sλ1 * ε;
- Ï0 = d3_geo_clipAntimeridianIntersect(λ0, Ï0, λ1, Ï1);
- listener.point(sλ0, Ï0);
- listener.lineEnd();
- listener.lineStart();
- listener.point(sλ1, Ï0);
- clean = 0;
+ var objIsObj = objTag == objectTag,
+ othIsObj = othTag == objectTag,
+ isSameTag = objTag == othTag;
+
+ if (isSameTag && isBuffer(object)) {
+ if (!isBuffer(other)) {
+ return false;
+ }
+ objIsArr = true;
+ objIsObj = false;
}
- listener.point(λ0 = λ1, Ï0 = Ï1);
- sλ0 = sλ1;
- },
- lineEnd: function() {
- listener.lineEnd();
- λ0 = Ï0 = NaN;
- },
- // if there are intersections, we always rejoin the first and last segments.
- clean: function() { return 2 - clean; }
- };
-}
+ if (isSameTag && !objIsObj) {
+ stack || (stack = new Stack);
+ return (objIsArr || isTypedArray(object))
+ ? equalArrays(object, other, bitmask, customizer, equalFunc, stack)
+ : equalByTag(object, other, objTag, bitmask, customizer, equalFunc, stack);
+ }
+ if (!(bitmask & COMPARE_PARTIAL_FLAG)) {
+ var objIsWrapped = objIsObj && hasOwnProperty.call(object, '__wrapped__'),
+ othIsWrapped = othIsObj && hasOwnProperty.call(other, '__wrapped__');
-function d3_geo_clipAntimeridianIntersect(λ0, Ï0, λ1, Ï1) {
- var cosÏ0,
- cosÏ1,
- sinλ0_λ1 = Math.sin(λ0 - λ1);
- return abs(sinλ0_λ1) > ε
- ? Math.atan((Math.sin(Ï0) * (cosÏ1 = Math.cos(Ï1)) * Math.sin(λ1)
- - Math.sin(Ï1) * (cosÏ0 = Math.cos(Ï0)) * Math.sin(λ0))
- / (cosÏ0 * cosÏ1 * sinλ0_λ1))
- : (Ï0 + Ï1) / 2;
-}
+ if (objIsWrapped || othIsWrapped) {
+ var objUnwrapped = objIsWrapped ? object.value() : object,
+ othUnwrapped = othIsWrapped ? other.value() : other;
-function d3_geo_clipAntimeridianInterpolate(from, to, direction, listener) {
- var Ï;
- if (from == null) {
- Ï = direction * halfÏ;
- listener.point(-Ï, Ï);
- listener.point( 0, Ï);
- listener.point( Ï, Ï);
- listener.point( Ï, 0);
- listener.point( Ï, -Ï);
- listener.point( 0, -Ï);
- listener.point(-Ï, -Ï);
- listener.point(-Ï, 0);
- listener.point(-Ï, Ï);
- } else if (abs(from[0] - to[0]) > ε) {
- var s = from[0] < to[0] ? Ï : -Ï;
- Ï = direction * s / 2;
- listener.point(-s, Ï);
- listener.point( 0, Ï);
- listener.point( s, Ï);
- } else {
- listener.point(to[0], to[1]);
- }
-}
-// TODO
-// cross and scale return new vectors,
-// whereas add and normalize operate in-place
+ stack || (stack = new Stack);
+ return equalFunc(objUnwrapped, othUnwrapped, bitmask, customizer, stack);
+ }
+ }
+ if (!isSameTag) {
+ return false;
+ }
+ stack || (stack = new Stack);
+ return equalObjects(object, other, bitmask, customizer, equalFunc, stack);
+ }
-function d3_geo_cartesian(spherical) {
- var λ = spherical[0],
- Ï = spherical[1],
- cosÏ = Math.cos(Ï);
- return [
- cosÏ * Math.cos(λ),
- cosÏ * Math.sin(λ),
- Math.sin(Ï)
- ];
-}
+ /**
+ * The base implementation of `_.isMap` without Node.js optimizations.
+ *
+ * @private
+ * @param {*} value The value to check.
+ * @returns {boolean} Returns `true` if `value` is a map, else `false`.
+ */
+ function baseIsMap(value) {
+ return isObjectLike(value) && getTag(value) == mapTag;
+ }
-function d3_geo_cartesianDot(a, b) {
- return a[0] * b[0] + a[1] * b[1] + a[2] * b[2];
-}
+ /**
+ * The base implementation of `_.isMatch` without support for iteratee shorthands.
+ *
+ * @private
+ * @param {Object} object The object to inspect.
+ * @param {Object} source The object of property values to match.
+ * @param {Array} matchData The property names, values, and compare flags to match.
+ * @param {Function} [customizer] The function to customize comparisons.
+ * @returns {boolean} Returns `true` if `object` is a match, else `false`.
+ */
+ function baseIsMatch(object, source, matchData, customizer) {
+ var index = matchData.length,
+ length = index,
+ noCustomizer = !customizer;
-function d3_geo_cartesianCross(a, b) {
- return [
- a[1] * b[2] - a[2] * b[1],
- a[2] * b[0] - a[0] * b[2],
- a[0] * b[1] - a[1] * b[0]
- ];
-}
+ if (object == null) {
+ return !length;
+ }
+ object = Object(object);
+ while (index--) {
+ var data = matchData[index];
+ if ((noCustomizer && data[2])
+ ? data[1] !== object[data[0]]
+ : !(data[0] in object)
+ ) {
+ return false;
+ }
+ }
+ while (++index < length) {
+ data = matchData[index];
+ var key = data[0],
+ objValue = object[key],
+ srcValue = data[1];
-function d3_geo_cartesianAdd(a, b) {
- a[0] += b[0];
- a[1] += b[1];
- a[2] += b[2];
-}
+ if (noCustomizer && data[2]) {
+ if (objValue === undefined && !(key in object)) {
+ return false;
+ }
+ } else {
+ var stack = new Stack;
+ if (customizer) {
+ var result = customizer(objValue, srcValue, key, object, source, stack);
+ }
+ if (!(result === undefined
+ ? baseIsEqual(srcValue, objValue, COMPARE_PARTIAL_FLAG | COMPARE_UNORDERED_FLAG, customizer, stack)
+ : result
+ )) {
+ return false;
+ }
+ }
+ }
+ return true;
+ }
-function d3_geo_cartesianScale(vector, k) {
- return [
- vector[0] * k,
- vector[1] * k,
- vector[2] * k
- ];
-}
+ /**
+ * The base implementation of `_.isNative` without bad shim checks.
+ *
+ * @private
+ * @param {*} value The value to check.
+ * @returns {boolean} Returns `true` if `value` is a native function,
+ * else `false`.
+ */
+ function baseIsNative(value) {
+ if (!isObject(value) || isMasked(value)) {
+ return false;
+ }
+ var pattern = isFunction(value) ? reIsNative : reIsHostCtor;
+ return pattern.test(toSource(value));
+ }
-function d3_geo_cartesianNormalize(d) {
- var l = Math.sqrt(d[0] * d[0] + d[1] * d[1] + d[2] * d[2]);
- d[0] /= l;
- d[1] /= l;
- d[2] /= l;
-}
-function d3_geo_compose(a, b) {
+ /**
+ * The base implementation of `_.isRegExp` without Node.js optimizations.
+ *
+ * @private
+ * @param {*} value The value to check.
+ * @returns {boolean} Returns `true` if `value` is a regexp, else `false`.
+ */
+ function baseIsRegExp(value) {
+ return isObjectLike(value) && baseGetTag(value) == regexpTag;
+ }
- function compose(x, y) {
- return x = a(x, y), b(x[0], x[1]);
- }
+ /**
+ * The base implementation of `_.isSet` without Node.js optimizations.
+ *
+ * @private
+ * @param {*} value The value to check.
+ * @returns {boolean} Returns `true` if `value` is a set, else `false`.
+ */
+ function baseIsSet(value) {
+ return isObjectLike(value) && getTag(value) == setTag;
+ }
- if (a.invert && b.invert) compose.invert = function(x, y) {
- return x = b.invert(x, y), x && a.invert(x[0], x[1]);
- };
+ /**
+ * The base implementation of `_.isTypedArray` without Node.js optimizations.
+ *
+ * @private
+ * @param {*} value The value to check.
+ * @returns {boolean} Returns `true` if `value` is a typed array, else `false`.
+ */
+ function baseIsTypedArray(value) {
+ return isObjectLike(value) &&
+ isLength(value.length) && !!typedArrayTags[baseGetTag(value)];
+ }
- return compose;
-}
+ /**
+ * The base implementation of `_.iteratee`.
+ *
+ * @private
+ * @param {*} [value=_.identity] The value to convert to an iteratee.
+ * @returns {Function} Returns the iteratee.
+ */
+ function baseIteratee(value) {
+ // Don't store the `typeof` result in a variable to avoid a JIT bug in Safari 9.
+ // See https://bugs.webkit.org/show_bug.cgi?id=156034 for more details.
+ if (typeof value == 'function') {
+ return value;
+ }
+ if (value == null) {
+ return identity;
+ }
+ if (typeof value == 'object') {
+ return isArray(value)
+ ? baseMatchesProperty(value[0], value[1])
+ : baseMatches(value);
+ }
+ return property(value);
+ }
-function d3_geo_equirectangular(λ, Ï) {
- return [λ, Ï];
-}
+ /**
+ * The base implementation of `_.keys` which doesn't treat sparse arrays as dense.
+ *
+ * @private
+ * @param {Object} object The object to query.
+ * @returns {Array} Returns the array of property names.
+ */
+ function baseKeys(object) {
+ if (!isPrototype(object)) {
+ return nativeKeys(object);
+ }
+ var result = [];
+ for (var key in Object(object)) {
+ if (hasOwnProperty.call(object, key) && key != 'constructor') {
+ result.push(key);
+ }
+ }
+ return result;
+ }
-(d3.geo.equirectangular = function() {
- return d3_geo_projection(d3_geo_equirectangular);
-}).raw = d3_geo_equirectangular.invert = d3_geo_equirectangular;
+ /**
+ * The base implementation of `_.keysIn` which doesn't treat sparse arrays as dense.
+ *
+ * @private
+ * @param {Object} object The object to query.
+ * @returns {Array} Returns the array of property names.
+ */
+ function baseKeysIn(object) {
+ if (!isObject(object)) {
+ return nativeKeysIn(object);
+ }
+ var isProto = isPrototype(object),
+ result = [];
-d3.geo.rotation = function(rotate) {
- rotate = d3_geo_rotation(rotate[0] % 360 * d3_radians, rotate[1] * d3_radians, rotate.length > 2 ? rotate[2] * d3_radians : 0);
+ for (var key in object) {
+ if (!(key == 'constructor' && (isProto || !hasOwnProperty.call(object, key)))) {
+ result.push(key);
+ }
+ }
+ return result;
+ }
- function forward(coordinates) {
- coordinates = rotate(coordinates[0] * d3_radians, coordinates[1] * d3_radians);
- return coordinates[0] *= d3_degrees, coordinates[1] *= d3_degrees, coordinates;
- }
+ /**
+ * The base implementation of `_.lt` which doesn't coerce arguments.
+ *
+ * @private
+ * @param {*} value The value to compare.
+ * @param {*} other The other value to compare.
+ * @returns {boolean} Returns `true` if `value` is less than `other`,
+ * else `false`.
+ */
+ function baseLt(value, other) {
+ return value < other;
+ }
- forward.invert = function(coordinates) {
- coordinates = rotate.invert(coordinates[0] * d3_radians, coordinates[1] * d3_radians);
- return coordinates[0] *= d3_degrees, coordinates[1] *= d3_degrees, coordinates;
- };
+ /**
+ * The base implementation of `_.map` without support for iteratee shorthands.
+ *
+ * @private
+ * @param {Array|Object} collection The collection to iterate over.
+ * @param {Function} iteratee The function invoked per iteration.
+ * @returns {Array} Returns the new mapped array.
+ */
+ function baseMap(collection, iteratee) {
+ var index = -1,
+ result = isArrayLike(collection) ? Array(collection.length) : [];
- return forward;
-};
+ baseEach(collection, function(value, key, collection) {
+ result[++index] = iteratee(value, key, collection);
+ });
+ return result;
+ }
-function d3_geo_identityRotation(λ, Ï) {
- return [λ > Ï ? λ - Ï : λ < -Ï ? λ + Ï : λ, Ï];
-}
+ /**
+ * The base implementation of `_.matches` which doesn't clone `source`.
+ *
+ * @private
+ * @param {Object} source The object of property values to match.
+ * @returns {Function} Returns the new spec function.
+ */
+ function baseMatches(source) {
+ var matchData = getMatchData(source);
+ if (matchData.length == 1 && matchData[0][2]) {
+ return matchesStrictComparable(matchData[0][0], matchData[0][1]);
+ }
+ return function(object) {
+ return object === source || baseIsMatch(object, source, matchData);
+ };
+ }
-d3_geo_identityRotation.invert = d3_geo_equirectangular;
+ /**
+ * The base implementation of `_.matchesProperty` which doesn't clone `srcValue`.
+ *
+ * @private
+ * @param {string} path The path of the property to get.
+ * @param {*} srcValue The value to match.
+ * @returns {Function} Returns the new spec function.
+ */
+ function baseMatchesProperty(path, srcValue) {
+ if (isKey(path) && isStrictComparable(srcValue)) {
+ return matchesStrictComparable(toKey(path), srcValue);
+ }
+ return function(object) {
+ var objValue = get(object, path);
+ return (objValue === undefined && objValue === srcValue)
+ ? hasIn(object, path)
+ : baseIsEqual(srcValue, objValue, COMPARE_PARTIAL_FLAG | COMPARE_UNORDERED_FLAG);
+ };
+ }
-// Note: |δλ| must be < 2Ï
-function d3_geo_rotation(δλ, δÏ, δγ) {
- return δλ ? (Î´Ï || δγ ? d3_geo_compose(d3_geo_rotationλ(δλ), d3_geo_rotationÏγ(δÏ, δγ))
- : d3_geo_rotationλ(δλ))
- : (Î´Ï || δγ ? d3_geo_rotationÏγ(δÏ, δγ)
- : d3_geo_identityRotation);
-}
+ /**
+ * The base implementation of `_.merge` without support for multiple sources.
+ *
+ * @private
+ * @param {Object} object The destination object.
+ * @param {Object} source The source object.
+ * @param {number} srcIndex The index of `source`.
+ * @param {Function} [customizer] The function to customize merged values.
+ * @param {Object} [stack] Tracks traversed source values and their merged
+ * counterparts.
+ */
+ function baseMerge(object, source, srcIndex, customizer, stack) {
+ if (object === source) {
+ return;
+ }
+ baseFor(source, function(srcValue, key) {
+ if (isObject(srcValue)) {
+ stack || (stack = new Stack);
+ baseMergeDeep(object, source, key, srcIndex, baseMerge, customizer, stack);
+ }
+ else {
+ var newValue = customizer
+ ? customizer(object[key], srcValue, (key + ''), object, source, stack)
+ : undefined;
-function d3_geo_forwardRotationλ(δλ) {
- return function(λ, Ï) {
- return λ += δλ, [λ > Ï ? λ - Ï : λ < -Ï ? λ + Ï : λ, Ï];
- };
-}
+ if (newValue === undefined) {
+ newValue = srcValue;
+ }
+ assignMergeValue(object, key, newValue);
+ }
+ }, keysIn);
+ }
-function d3_geo_rotationλ(δλ) {
- var rotation = d3_geo_forwardRotationλ(δλ);
- rotation.invert = d3_geo_forwardRotationλ(-δλ);
- return rotation;
-}
+ /**
+ * A specialized version of `baseMerge` for arrays and objects which performs
+ * deep merges and tracks traversed objects enabling objects with circular
+ * references to be merged.
+ *
+ * @private
+ * @param {Object} object The destination object.
+ * @param {Object} source The source object.
+ * @param {string} key The key of the value to merge.
+ * @param {number} srcIndex The index of `source`.
+ * @param {Function} mergeFunc The function to merge values.
+ * @param {Function} [customizer] The function to customize assigned values.
+ * @param {Object} [stack] Tracks traversed source values and their merged
+ * counterparts.
+ */
+ function baseMergeDeep(object, source, key, srcIndex, mergeFunc, customizer, stack) {
+ var objValue = object[key],
+ srcValue = source[key],
+ stacked = stack.get(srcValue);
-function d3_geo_rotationÏγ(δÏ, δγ) {
- var cosÎ´Ï = Math.cos(δÏ),
- sinÎ´Ï = Math.sin(δÏ),
- cosδγ = Math.cos(δγ),
- sinδγ = Math.sin(δγ);
+ if (stacked) {
+ assignMergeValue(object, key, stacked);
+ return;
+ }
+ var newValue = customizer
+ ? customizer(objValue, srcValue, (key + ''), object, source, stack)
+ : undefined;
- function rotation(λ, Ï) {
- var cosÏ = Math.cos(Ï),
- x = Math.cos(λ) * cosÏ,
- y = Math.sin(λ) * cosÏ,
- z = Math.sin(Ï),
- k = z * cosÎ´Ï + x * sinδÏ;
- return [
- Math.atan2(y * cosδγ - k * sinδγ, x * cosÎ´Ï - z * sinδÏ),
- d3_asin(k * cosδγ + y * sinδγ)
- ];
- }
+ var isCommon = newValue === undefined;
- rotation.invert = function(λ, Ï) {
- var cosÏ = Math.cos(Ï),
- x = Math.cos(λ) * cosÏ,
- y = Math.sin(λ) * cosÏ,
- z = Math.sin(Ï),
- k = z * cosδγ - y * sinδγ;
- return [
- Math.atan2(y * cosδγ + z * sinδγ, x * cosÎ´Ï + k * sinδÏ),
- d3_asin(k * cosÎ´Ï - x * sinδÏ)
- ];
- };
-
- return rotation;
-}
+ if (isCommon) {
+ var isArr = isArray(srcValue),
+ isBuff = !isArr && isBuffer(srcValue),
+ isTyped = !isArr && !isBuff && isTypedArray(srcValue);
-d3.geo.circle = function() {
- var origin = [0, 0],
- angle,
- precision = 6,
- interpolate;
-
- function circle() {
- var center = typeof origin === "function" ? origin.apply(this, arguments) : origin,
- rotate = d3_geo_rotation(-center[0] * d3_radians, -center[1] * d3_radians, 0).invert,
- ring = [];
+ newValue = srcValue;
+ if (isArr || isBuff || isTyped) {
+ if (isArray(objValue)) {
+ newValue = objValue;
+ }
+ else if (isArrayLikeObject(objValue)) {
+ newValue = copyArray(objValue);
+ }
+ else if (isBuff) {
+ isCommon = false;
+ newValue = cloneBuffer(srcValue, true);
+ }
+ else if (isTyped) {
+ isCommon = false;
+ newValue = cloneTypedArray(srcValue, true);
+ }
+ else {
+ newValue = [];
+ }
+ }
+ else if (isPlainObject(srcValue) || isArguments(srcValue)) {
+ newValue = objValue;
+ if (isArguments(objValue)) {
+ newValue = toPlainObject(objValue);
+ }
+ else if (!isObject(objValue) || (srcIndex && isFunction(objValue))) {
+ newValue = initCloneObject(srcValue);
+ }
+ }
+ else {
+ isCommon = false;
+ }
+ }
+ if (isCommon) {
+ // Recursively merge objects and arrays (susceptible to call stack limits).
+ stack.set(srcValue, newValue);
+ mergeFunc(newValue, srcValue, srcIndex, customizer, stack);
+ stack['delete'](srcValue);
+ }
+ assignMergeValue(object, key, newValue);
+ }
- interpolate(null, null, 1, {
- point: function(x, y) {
- ring.push(x = rotate(x, y));
- x[0] *= d3_degrees, x[1] *= d3_degrees;
+ /**
+ * The base implementation of `_.nth` which doesn't coerce arguments.
+ *
+ * @private
+ * @param {Array} array The array to query.
+ * @param {number} n The index of the element to return.
+ * @returns {*} Returns the nth element of `array`.
+ */
+ function baseNth(array, n) {
+ var length = array.length;
+ if (!length) {
+ return;
}
- });
+ n += n < 0 ? length : 0;
+ return isIndex(n, length) ? array[n] : undefined;
+ }
- return {type: "Polygon", coordinates: [ring]};
- }
+ /**
+ * The base implementation of `_.orderBy` without param guards.
+ *
+ * @private
+ * @param {Array|Object} collection The collection to iterate over.
+ * @param {Function[]|Object[]|string[]} iteratees The iteratees to sort by.
+ * @param {string[]} orders The sort orders of `iteratees`.
+ * @returns {Array} Returns the new sorted array.
+ */
+ function baseOrderBy(collection, iteratees, orders) {
+ var index = -1;
+ iteratees = arrayMap(iteratees.length ? iteratees : [identity], baseUnary(getIteratee()));
- circle.origin = function(x) {
- if (!arguments.length) return origin;
- origin = x;
- return circle;
- };
+ var result = baseMap(collection, function(value, key, collection) {
+ var criteria = arrayMap(iteratees, function(iteratee) {
+ return iteratee(value);
+ });
+ return { 'criteria': criteria, 'index': ++index, 'value': value };
+ });
- circle.angle = function(x) {
- if (!arguments.length) return angle;
- interpolate = d3_geo_circleInterpolate((angle = +x) * d3_radians, precision * d3_radians);
- return circle;
- };
+ return baseSortBy(result, function(object, other) {
+ return compareMultiple(object, other, orders);
+ });
+ }
- circle.precision = function(_) {
- if (!arguments.length) return precision;
- interpolate = d3_geo_circleInterpolate(angle * d3_radians, (precision = +_) * d3_radians);
- return circle;
- };
+ /**
+ * The base implementation of `_.pick` without support for individual
+ * property identifiers.
+ *
+ * @private
+ * @param {Object} object The source object.
+ * @param {string[]} paths The property paths to pick.
+ * @returns {Object} Returns the new object.
+ */
+ function basePick(object, paths) {
+ return basePickBy(object, paths, function(value, path) {
+ return hasIn(object, path);
+ });
+ }
- return circle.angle(90);
-};
+ /**
+ * The base implementation of `_.pickBy` without support for iteratee shorthands.
+ *
+ * @private
+ * @param {Object} object The source object.
+ * @param {string[]} paths The property paths to pick.
+ * @param {Function} predicate The function invoked per property.
+ * @returns {Object} Returns the new object.
+ */
+ function basePickBy(object, paths, predicate) {
+ var index = -1,
+ length = paths.length,
+ result = {};
-// Interpolates along a circle centered at [0°, 0°], with a given radius and
-// precision.
-function d3_geo_circleInterpolate(radius, precision) {
- var cr = Math.cos(radius),
- sr = Math.sin(radius);
- return function(from, to, direction, listener) {
- var step = direction * precision;
- if (from != null) {
- from = d3_geo_circleAngle(cr, from);
- to = d3_geo_circleAngle(cr, to);
- if (direction > 0 ? from < to: from > to) from += direction * Ï;
- } else {
- from = radius + direction * Ï;
- to = radius - .5 * step;
+ while (++index < length) {
+ var path = paths[index],
+ value = baseGet(object, path);
+
+ if (predicate(value, path)) {
+ baseSet(result, castPath(path, object), value);
+ }
+ }
+ return result;
}
- for (var point, t = from; direction > 0 ? t > to : t < to; t -= step) {
- listener.point((point = d3_geo_spherical([
- cr,
- -sr * Math.cos(t),
- -sr * Math.sin(t)
- ]))[0], point[1]);
+
+ /**
+ * A specialized version of `baseProperty` which supports deep paths.
+ *
+ * @private
+ * @param {Array|string} path The path of the property to get.
+ * @returns {Function} Returns the new accessor function.
+ */
+ function basePropertyDeep(path) {
+ return function(object) {
+ return baseGet(object, path);
+ };
}
- };
-}
-// Signed angle of a cartesian point relative to [cr, 0, 0].
-function d3_geo_circleAngle(cr, point) {
- var a = d3_geo_cartesian(point);
- a[0] -= cr;
- d3_geo_cartesianNormalize(a);
- var angle = d3_acos(-a[1]);
- return ((-a[2] < 0 ? -angle : angle) + 2 * Math.PI - ε) % (2 * Math.PI);
-}
-// Adds floating point numbers with twice the normal precision.
-// Reference: J. R. Shewchuk, Adaptive Precision Floating-Point Arithmetic and
-// Fast Robust Geometric Predicates, Discrete & Computational Geometry 18(3)
-// 305â363 (1997).
-// Code adapted from GeographicLib by Charles F. F. Karney,
-// http://geographiclib.sourceforge.net/
-// See lib/geographiclib/LICENSE for details.
+ /**
+ * The base implementation of `_.pullAllBy` without support for iteratee
+ * shorthands.
+ *
+ * @private
+ * @param {Array} array The array to modify.
+ * @param {Array} values The values to remove.
+ * @param {Function} [iteratee] The iteratee invoked per element.
+ * @param {Function} [comparator] The comparator invoked per element.
+ * @returns {Array} Returns `array`.
+ */
+ function basePullAll(array, values, iteratee, comparator) {
+ var indexOf = comparator ? baseIndexOfWith : baseIndexOf,
+ index = -1,
+ length = values.length,
+ seen = array;
-function d3_adder() {}
+ if (array === values) {
+ values = copyArray(values);
+ }
+ if (iteratee) {
+ seen = arrayMap(array, baseUnary(iteratee));
+ }
+ while (++index < length) {
+ var fromIndex = 0,
+ value = values[index],
+ computed = iteratee ? iteratee(value) : value;
-d3_adder.prototype = {
- s: 0, // rounded value
- t: 0, // exact error
- add: function(y) {
- d3_adderSum(y, this.t, d3_adderTemp);
- d3_adderSum(d3_adderTemp.s, this.s, this);
- if (this.s) this.t += d3_adderTemp.t;
- else this.s = d3_adderTemp.t;
- },
- reset: function() {
- this.s = this.t = 0;
- },
- valueOf: function() {
- return this.s;
- }
-};
+ while ((fromIndex = indexOf(seen, computed, fromIndex, comparator)) > -1) {
+ if (seen !== array) {
+ splice.call(seen, fromIndex, 1);
+ }
+ splice.call(array, fromIndex, 1);
+ }
+ }
+ return array;
+ }
-var d3_adderTemp = new d3_adder;
+ /**
+ * The base implementation of `_.pullAt` without support for individual
+ * indexes or capturing the removed elements.
+ *
+ * @private
+ * @param {Array} array The array to modify.
+ * @param {number[]} indexes The indexes of elements to remove.
+ * @returns {Array} Returns `array`.
+ */
+ function basePullAt(array, indexes) {
+ var length = array ? indexes.length : 0,
+ lastIndex = length - 1;
-function d3_adderSum(a, b, o) {
- var x = o.s = a + b, // a + b
- bv = x - a, av = x - bv; // b_virtual & a_virtual
- o.t = (a - av) + (b - bv); // a_roundoff + b_roundoff
-}
+ while (length--) {
+ var index = indexes[length];
+ if (length == lastIndex || index !== previous) {
+ var previous = index;
+ if (isIndex(index)) {
+ splice.call(array, index, 1);
+ } else {
+ baseUnset(array, index);
+ }
+ }
+ }
+ return array;
+ }
-d3.geo.area = function(object) {
- d3_geo_areaSum = 0;
- d3.geo.stream(object, d3_geo_area);
- return d3_geo_areaSum;
-};
+ /**
+ * The base implementation of `_.random` without support for returning
+ * floating-point numbers.
+ *
+ * @private
+ * @param {number} lower The lower bound.
+ * @param {number} upper The upper bound.
+ * @returns {number} Returns the random number.
+ */
+ function baseRandom(lower, upper) {
+ return lower + nativeFloor(nativeRandom() * (upper - lower + 1));
+ }
+
+ /**
+ * The base implementation of `_.range` and `_.rangeRight` which doesn't
+ * coerce arguments.
+ *
+ * @private
+ * @param {number} start The start of the range.
+ * @param {number} end The end of the range.
+ * @param {number} step The value to increment or decrement by.
+ * @param {boolean} [fromRight] Specify iterating from right to left.
+ * @returns {Array} Returns the range of numbers.
+ */
+ function baseRange(start, end, step, fromRight) {
+ var index = -1,
+ length = nativeMax(nativeCeil((end - start) / (step || 1)), 0),
+ result = Array(length);
-var d3_geo_areaSum,
- d3_geo_areaRingSum = new d3_adder;
+ while (length--) {
+ result[fromRight ? length : ++index] = start;
+ start += step;
+ }
+ return result;
+ }
-var d3_geo_area = {
- sphere: function() { d3_geo_areaSum += 4 * Ï; },
- point: d3_noop,
- lineStart: d3_noop,
- lineEnd: d3_noop,
+ /**
+ * The base implementation of `_.repeat` which doesn't coerce arguments.
+ *
+ * @private
+ * @param {string} string The string to repeat.
+ * @param {number} n The number of times to repeat the string.
+ * @returns {string} Returns the repeated string.
+ */
+ function baseRepeat(string, n) {
+ var result = '';
+ if (!string || n < 1 || n > MAX_SAFE_INTEGER) {
+ return result;
+ }
+ // Leverage the exponentiation by squaring algorithm for a faster repeat.
+ // See https://en.wikipedia.org/wiki/Exponentiation_by_squaring for more details.
+ do {
+ if (n % 2) {
+ result += string;
+ }
+ n = nativeFloor(n / 2);
+ if (n) {
+ string += string;
+ }
+ } while (n);
- // Only count area for polygon rings.
- polygonStart: function() {
- d3_geo_areaRingSum.reset();
- d3_geo_area.lineStart = d3_geo_areaRingStart;
- },
- polygonEnd: function() {
- var area = 2 * d3_geo_areaRingSum;
- d3_geo_areaSum += area < 0 ? 4 * Ï + area : area;
- d3_geo_area.lineStart = d3_geo_area.lineEnd = d3_geo_area.point = d3_noop;
- }
-};
+ return result;
+ }
-function d3_geo_areaRingStart() {
- var λ00, Ï00, λ0, cosÏ0, sinÏ0; // start point and previous point
+ /**
+ * The base implementation of `_.rest` which doesn't validate or coerce arguments.
+ *
+ * @private
+ * @param {Function} func The function to apply a rest parameter to.
+ * @param {number} [start=func.length-1] The start position of the rest parameter.
+ * @returns {Function} Returns the new function.
+ */
+ function baseRest(func, start) {
+ return setToString(overRest(func, start, identity), func + '');
+ }
- // For the first point, â¦
- d3_geo_area.point = function(λ, Ï) {
- d3_geo_area.point = nextPoint;
- λ0 = (λ00 = λ) * d3_radians, cosÏ0 = Math.cos(Ï = (Ï00 = Ï) * d3_radians / 2 + Ï / 4), sinÏ0 = Math.sin(Ï);
- };
+ /**
+ * The base implementation of `_.sample`.
+ *
+ * @private
+ * @param {Array|Object} collection The collection to sample.
+ * @returns {*} Returns the random element.
+ */
+ function baseSample(collection) {
+ return arraySample(values(collection));
+ }
- // For subsequent points, â¦
- function nextPoint(λ, Ï) {
- λ *= d3_radians;
- Ï = Ï * d3_radians / 2 + Ï / 4; // half the angular distance from south pole
+ /**
+ * The base implementation of `_.sampleSize` without param guards.
+ *
+ * @private
+ * @param {Array|Object} collection The collection to sample.
+ * @param {number} n The number of elements to sample.
+ * @returns {Array} Returns the random elements.
+ */
+ function baseSampleSize(collection, n) {
+ var array = values(collection);
+ return shuffleSelf(array, baseClamp(n, 0, array.length));
+ }
- // Spherical excess E for a spherical triangle with vertices: south pole,
- // previous point, current point. Uses a formula derived from Cagnoliâs
- // theorem. See Todhunter, Spherical Trig. (1871), Sec. 103, Eq. (2).
- var dλ = λ - λ0,
- sdλ = dλ >= 0 ? 1 : -1,
- adλ = sdλ * dλ,
- cosÏ = Math.cos(Ï),
- sinÏ = Math.sin(Ï),
- k = sinÏ0 * sinÏ,
- u = cosÏ0 * cosÏ + k * Math.cos(adλ),
- v = k * sdλ * Math.sin(adλ);
- d3_geo_areaRingSum.add(Math.atan2(v, u));
+ /**
+ * The base implementation of `_.set`.
+ *
+ * @private
+ * @param {Object} object The object to modify.
+ * @param {Array|string} path The path of the property to set.
+ * @param {*} value The value to set.
+ * @param {Function} [customizer] The function to customize path creation.
+ * @returns {Object} Returns `object`.
+ */
+ function baseSet(object, path, value, customizer) {
+ if (!isObject(object)) {
+ return object;
+ }
+ path = castPath(path, object);
- // Advance the previous points.
- λ0 = λ, cosÏ0 = cosÏ, sinÏ0 = sinÏ;
- }
+ var index = -1,
+ length = path.length,
+ lastIndex = length - 1,
+ nested = object;
+
+ while (nested != null && ++index < length) {
+ var key = toKey(path[index]),
+ newValue = value;
+
+ if (index != lastIndex) {
+ var objValue = nested[key];
+ newValue = customizer ? customizer(objValue, key, nested) : undefined;
+ if (newValue === undefined) {
+ newValue = isObject(objValue)
+ ? objValue
+ : (isIndex(path[index + 1]) ? [] : {});
+ }
+ }
+ assignValue(nested, key, newValue);
+ nested = nested[key];
+ }
+ return object;
+ }
- // For the last point, return to the start.
- d3_geo_area.lineEnd = function() {
- nextPoint(λ00, Ï00);
- };
-}
+ /**
+ * The base implementation of `setData` without support for hot loop shorting.
+ *
+ * @private
+ * @param {Function} func The function to associate metadata with.
+ * @param {*} data The metadata.
+ * @returns {Function} Returns `func`.
+ */
+ var baseSetData = !metaMap ? identity : function(func, data) {
+ metaMap.set(func, data);
+ return func;
+ };
-function d3_geo_pointInPolygon(point, polygon) {
- var meridian = point[0],
- parallel = point[1],
- meridianNormal = [Math.sin(meridian), -Math.cos(meridian), 0],
- polarAngle = 0,
- winding = 0;
- d3_geo_areaRingSum.reset();
+ /**
+ * The base implementation of `setToString` without support for hot loop shorting.
+ *
+ * @private
+ * @param {Function} func The function to modify.
+ * @param {Function} string The `toString` result.
+ * @returns {Function} Returns `func`.
+ */
+ var baseSetToString = !defineProperty ? identity : function(func, string) {
+ return defineProperty(func, 'toString', {
+ 'configurable': true,
+ 'enumerable': false,
+ 'value': constant(string),
+ 'writable': true
+ });
+ };
- for (var i = 0, n = polygon.length; i < n; ++i) {
- var ring = polygon[i],
- m = ring.length;
- if (!m) continue;
- var point0 = ring[0],
- λ0 = point0[0],
- Ï0 = point0[1] / 2 + Ï / 4,
- sinÏ0 = Math.sin(Ï0),
- cosÏ0 = Math.cos(Ï0),
- j = 1;
-
- while (true) {
- if (j === m) j = 0;
- point = ring[j];
- var λ = point[0],
- Ï = point[1] / 2 + Ï / 4,
- sinÏ = Math.sin(Ï),
- cosÏ = Math.cos(Ï),
- dλ = λ - λ0,
- sdλ = dλ >= 0 ? 1 : -1,
- adλ = sdλ * dλ,
- antimeridian = adλ > Ï,
- k = sinÏ0 * sinÏ;
- d3_geo_areaRingSum.add(Math.atan2(k * sdλ * Math.sin(adλ), cosÏ0 * cosÏ + k * Math.cos(adλ)));
-
- polarAngle += antimeridian ? dλ + sdλ * Ï : dλ;
-
- // Are the longitudes either side of the point's meridian, and are the
- // latitudes smaller than the parallel?
- if (antimeridian ^ λ0 >= meridian ^ λ >= meridian) {
- var arc = d3_geo_cartesianCross(d3_geo_cartesian(point0), d3_geo_cartesian(point));
- d3_geo_cartesianNormalize(arc);
- var intersection = d3_geo_cartesianCross(meridianNormal, arc);
- d3_geo_cartesianNormalize(intersection);
- var Ïarc = (antimeridian ^ dλ >= 0 ? -1 : 1) * d3_asin(intersection[2]);
- if (parallel > Ïarc || parallel === Ïarc && (arc[0] || arc[1])) {
- winding += antimeridian ^ dλ >= 0 ? 1 : -1;
- }
- }
- if (!j++) break;
- λ0 = λ, sinÏ0 = sinÏ, cosÏ0 = cosÏ, point0 = point;
+ /**
+ * The base implementation of `_.shuffle`.
+ *
+ * @private
+ * @param {Array|Object} collection The collection to shuffle.
+ * @returns {Array} Returns the new shuffled array.
+ */
+ function baseShuffle(collection) {
+ return shuffleSelf(values(collection));
}
- }
- // First, determine whether the South pole is inside or outside:
- //
- // It is inside if:
- // * the polygon winds around it in a clockwise direction.
- // * the polygon does not (cumulatively) wind around it, but has a negative
- // (counter-clockwise) area.
- //
- // Second, count the (signed) number of times a segment crosses a meridian
- // from the point to the South pole. If it is zero, then the point is the
- // same side as the South pole.
+ /**
+ * The base implementation of `_.slice` without an iteratee call guard.
+ *
+ * @private
+ * @param {Array} array The array to slice.
+ * @param {number} [start=0] The start position.
+ * @param {number} [end=array.length] The end position.
+ * @returns {Array} Returns the slice of `array`.
+ */
+ function baseSlice(array, start, end) {
+ var index = -1,
+ length = array.length;
- return (polarAngle < -ε || polarAngle < ε && d3_geo_areaRingSum < 0) ^ (winding & 1);
-}
+ if (start < 0) {
+ start = -start > length ? 0 : (length + start);
+ }
+ end = end > length ? length : end;
+ if (end < 0) {
+ end += length;
+ }
+ length = start > end ? 0 : ((end - start) >>> 0);
+ start >>>= 0;
-// Clip features against a small circle centered at [0°, 0°].
-function d3_geo_clipCircle(radius) {
- var cr = Math.cos(radius),
- smallRadius = cr > 0,
- notHemisphere = abs(cr) > ε, // TODO optimise for this common case
- interpolate = d3_geo_circleInterpolate(radius, 6 * d3_radians);
+ var result = Array(length);
+ while (++index < length) {
+ result[index] = array[index + start];
+ }
+ return result;
+ }
- return d3_geo_clip(visible, clipLine, interpolate, smallRadius ? [0, -radius] : [-Ï, radius - Ï]);
+ /**
+ * The base implementation of `_.some` without support for iteratee shorthands.
+ *
+ * @private
+ * @param {Array|Object} collection The collection to iterate over.
+ * @param {Function} predicate The function invoked per iteration.
+ * @returns {boolean} Returns `true` if any element passes the predicate check,
+ * else `false`.
+ */
+ function baseSome(collection, predicate) {
+ var result;
- function visible(λ, Ï) {
- return Math.cos(λ) * Math.cos(Ï) > cr;
- }
+ baseEach(collection, function(value, index, collection) {
+ result = predicate(value, index, collection);
+ return !result;
+ });
+ return !!result;
+ }
- // Takes a line and cuts into visible segments. Return values used for
- // polygon clipping:
- // 0: there were intersections or the line was empty.
- // 1: no intersections.
- // 2: there were intersections, and the first and last segments should be
- // rejoined.
- function clipLine(listener) {
- var point0, // previous point
- c0, // code for previous point
- v0, // visibility of previous point
- v00, // visibility of first point
- clean; // no intersections
- return {
- lineStart: function() {
- v00 = v0 = false;
- clean = 1;
- },
- point: function(λ, Ï) {
- var point1 = [λ, Ï],
- point2,
- v = visible(λ, Ï),
- c = smallRadius
- ? v ? 0 : code(λ, Ï)
- : v ? code(λ + (λ < 0 ? Ï : -Ï), Ï) : 0;
- if (!point0 && (v00 = v0 = v)) listener.lineStart();
- // Handle degeneracies.
- // TODO ignore if not clipping polygons.
- if (v !== v0) {
- point2 = intersect(point0, point1);
- if (d3_geo_sphericalEqual(point0, point2) || d3_geo_sphericalEqual(point1, point2)) {
- point1[0] += ε;
- point1[1] += ε;
- v = visible(point1[0], point1[1]);
- }
- }
- if (v !== v0) {
- clean = 0;
- if (v) {
- // outside going in
- listener.lineStart();
- point2 = intersect(point1, point0);
- listener.point(point2[0], point2[1]);
+ /**
+ * The base implementation of `_.sortedIndex` and `_.sortedLastIndex` which
+ * performs a binary search of `array` to determine the index at which `value`
+ * should be inserted into `array` in order to maintain its sort order.
+ *
+ * @private
+ * @param {Array} array The sorted array to inspect.
+ * @param {*} value The value to evaluate.
+ * @param {boolean} [retHighest] Specify returning the highest qualified index.
+ * @returns {number} Returns the index at which `value` should be inserted
+ * into `array`.
+ */
+ function baseSortedIndex(array, value, retHighest) {
+ var low = 0,
+ high = array == null ? low : array.length;
+
+ if (typeof value == 'number' && value === value && high <= HALF_MAX_ARRAY_LENGTH) {
+ while (low < high) {
+ var mid = (low + high) >>> 1,
+ computed = array[mid];
+
+ if (computed !== null && !isSymbol(computed) &&
+ (retHighest ? (computed <= value) : (computed < value))) {
+ low = mid + 1;
} else {
- // inside going out
- point2 = intersect(point0, point1);
- listener.point(point2[0], point2[1]);
- listener.lineEnd();
- }
- point0 = point2;
- } else if (notHemisphere && point0 && smallRadius ^ v) {
- var t;
- // If the codes for two points are different, or are both zero,
- // and there this segment intersects with the small circle.
- if (!(c & c0) && (t = intersect(point1, point0, true))) {
- clean = 0;
- if (smallRadius) {
- listener.lineStart();
- listener.point(t[0][0], t[0][1]);
- listener.point(t[1][0], t[1][1]);
- listener.lineEnd();
- } else {
- listener.point(t[1][0], t[1][1]);
- listener.lineEnd();
- listener.lineStart();
- listener.point(t[0][0], t[0][1]);
- }
+ high = mid;
}
}
- if (v && (!point0 || !d3_geo_sphericalEqual(point0, point1))) {
- listener.point(point1[0], point1[1]);
- }
- point0 = point1, v0 = v, c0 = c;
- },
- lineEnd: function() {
- if (v0) listener.lineEnd();
- point0 = null;
- },
- // Rejoin first and last segments if there were intersections and the first
- // and last points were visible.
- clean: function() { return clean | ((v00 && v0) << 1); }
- };
- }
+ return high;
+ }
+ return baseSortedIndexBy(array, value, identity, retHighest);
+ }
- // Intersects the great circle between a and b with the clip circle.
- function intersect(a, b, two) {
- var pa = d3_geo_cartesian(a),
- pb = d3_geo_cartesian(b);
+ /**
+ * The base implementation of `_.sortedIndexBy` and `_.sortedLastIndexBy`
+ * which invokes `iteratee` for `value` and each element of `array` to compute
+ * their sort ranking. The iteratee is invoked with one argument; (value).
+ *
+ * @private
+ * @param {Array} array The sorted array to inspect.
+ * @param {*} value The value to evaluate.
+ * @param {Function} iteratee The iteratee invoked per element.
+ * @param {boolean} [retHighest] Specify returning the highest qualified index.
+ * @returns {number} Returns the index at which `value` should be inserted
+ * into `array`.
+ */
+ function baseSortedIndexBy(array, value, iteratee, retHighest) {
+ value = iteratee(value);
- // We have two planes, n1.p = d1 and n2.p = d2.
- // Find intersection line p(t) = c1 n1 + c2 n2 + t (n1 ⨯ n2).
- var n1 = [1, 0, 0], // normal
- n2 = d3_geo_cartesianCross(pa, pb),
- n2n2 = d3_geo_cartesianDot(n2, n2),
- n1n2 = n2[0], // d3_geo_cartesianDot(n1, n2),
- determinant = n2n2 - n1n2 * n1n2;
-
- // Two polar points.
- if (!determinant) return !two && a;
-
- var c1 = cr * n2n2 / determinant,
- c2 = -cr * n1n2 / determinant,
- n1xn2 = d3_geo_cartesianCross(n1, n2),
- A = d3_geo_cartesianScale(n1, c1),
- B = d3_geo_cartesianScale(n2, c2);
- d3_geo_cartesianAdd(A, B);
-
- // Solve |p(t)|^2 = 1.
- var u = n1xn2,
- w = d3_geo_cartesianDot(A, u),
- uu = d3_geo_cartesianDot(u, u),
- t2 = w * w - uu * (d3_geo_cartesianDot(A, A) - 1);
+ var low = 0,
+ high = array == null ? 0 : array.length,
+ valIsNaN = value !== value,
+ valIsNull = value === null,
+ valIsSymbol = isSymbol(value),
+ valIsUndefined = value === undefined;
- if (t2 < 0) return;
+ while (low < high) {
+ var mid = nativeFloor((low + high) / 2),
+ computed = iteratee(array[mid]),
+ othIsDefined = computed !== undefined,
+ othIsNull = computed === null,
+ othIsReflexive = computed === computed,
+ othIsSymbol = isSymbol(computed);
+
+ if (valIsNaN) {
+ var setLow = retHighest || othIsReflexive;
+ } else if (valIsUndefined) {
+ setLow = othIsReflexive && (retHighest || othIsDefined);
+ } else if (valIsNull) {
+ setLow = othIsReflexive && othIsDefined && (retHighest || !othIsNull);
+ } else if (valIsSymbol) {
+ setLow = othIsReflexive && othIsDefined && !othIsNull && (retHighest || !othIsSymbol);
+ } else if (othIsNull || othIsSymbol) {
+ setLow = false;
+ } else {
+ setLow = retHighest ? (computed <= value) : (computed < value);
+ }
+ if (setLow) {
+ low = mid + 1;
+ } else {
+ high = mid;
+ }
+ }
+ return nativeMin(high, MAX_ARRAY_INDEX);
+ }
- var t = Math.sqrt(t2),
- q = d3_geo_cartesianScale(u, (-w - t) / uu);
- d3_geo_cartesianAdd(q, A);
- q = d3_geo_spherical(q);
- if (!two) return q;
+ /**
+ * The base implementation of `_.sortedUniq` and `_.sortedUniqBy` without
+ * support for iteratee shorthands.
+ *
+ * @private
+ * @param {Array} array The array to inspect.
+ * @param {Function} [iteratee] The iteratee invoked per element.
+ * @returns {Array} Returns the new duplicate free array.
+ */
+ function baseSortedUniq(array, iteratee) {
+ var index = -1,
+ length = array.length,
+ resIndex = 0,
+ result = [];
- // Two intersection points.
- var λ0 = a[0],
- λ1 = b[0],
- Ï0 = a[1],
- Ï1 = b[1],
- z;
- if (λ1 < λ0) z = λ0, λ0 = λ1, λ1 = z;
- var δλ = λ1 - λ0,
- polar = abs(δλ - Ï) < ε,
- meridian = polar || δλ < ε;
+ while (++index < length) {
+ var value = array[index],
+ computed = iteratee ? iteratee(value) : value;
- if (!polar && Ï1 < Ï0) z = Ï0, Ï0 = Ï1, Ï1 = z;
+ if (!index || !eq(computed, seen)) {
+ var seen = computed;
+ result[resIndex++] = value === 0 ? 0 : value;
+ }
+ }
+ return result;
+ }
- // Check that the first point is between a and b.
- if (meridian
- ? polar
- ? Ï0 + Ï1 > 0 ^ q[1] < (abs(q[0] - λ0) < ε ? Ï0 : Ï1)
- : Ï0 <= q[1] && q[1] <= Ï1
- : δλ > Ï ^ (λ0 <= q[0] && q[0] <= λ1)) {
- var q1 = d3_geo_cartesianScale(u, (-w + t) / uu);
- d3_geo_cartesianAdd(q1, A);
- return [q, d3_geo_spherical(q1)];
+ /**
+ * The base implementation of `_.toNumber` which doesn't ensure correct
+ * conversions of binary, hexadecimal, or octal string values.
+ *
+ * @private
+ * @param {*} value The value to process.
+ * @returns {number} Returns the number.
+ */
+ function baseToNumber(value) {
+ if (typeof value == 'number') {
+ return value;
+ }
+ if (isSymbol(value)) {
+ return NAN;
+ }
+ return +value;
}
- }
- // Generates a 4-bit vector representing the location of a point relative to
- // the small circle's bounding box.
- function code(λ, Ï) {
- var r = smallRadius ? radius : Ï - radius,
- code = 0;
- if (λ < -r) code |= 1; // left
- else if (λ > r) code |= 2; // right
- if (Ï < -r) code |= 4; // below
- else if (Ï > r) code |= 8; // above
- return code;
- }
-}
+ /**
+ * The base implementation of `_.toString` which doesn't convert nullish
+ * values to empty strings.
+ *
+ * @private
+ * @param {*} value The value to process.
+ * @returns {string} Returns the string.
+ */
+ function baseToString(value) {
+ // Exit early for strings to avoid a performance hit in some environments.
+ if (typeof value == 'string') {
+ return value;
+ }
+ if (isArray(value)) {
+ // Recursively convert values (susceptible to call stack limits).
+ return arrayMap(value, baseToString) + '';
+ }
+ if (isSymbol(value)) {
+ return symbolToString ? symbolToString.call(value) : '';
+ }
+ var result = (value + '');
+ return (result == '0' && (1 / value) == -INFINITY) ? '-0' : result;
+ }
-// LiangâBarsky line clipping.
-function d3_geom_clipLine(x0, y0, x1, y1) {
- return function(line) {
- var a = line.a,
- b = line.b,
- ax = a.x,
- ay = a.y,
- bx = b.x,
- by = b.y,
- t0 = 0,
- t1 = 1,
- dx = bx - ax,
- dy = by - ay,
- r;
+ /**
+ * The base implementation of `_.uniqBy` without support for iteratee shorthands.
+ *
+ * @private
+ * @param {Array} array The array to inspect.
+ * @param {Function} [iteratee] The iteratee invoked per element.
+ * @param {Function} [comparator] The comparator invoked per element.
+ * @returns {Array} Returns the new duplicate free array.
+ */
+ function baseUniq(array, iteratee, comparator) {
+ var index = -1,
+ includes = arrayIncludes,
+ length = array.length,
+ isCommon = true,
+ result = [],
+ seen = result;
- r = x0 - ax;
- if (!dx && r > 0) return;
- r /= dx;
- if (dx < 0) {
- if (r < t0) return;
- if (r < t1) t1 = r;
- } else if (dx > 0) {
- if (r > t1) return;
- if (r > t0) t0 = r;
- }
-
- r = x1 - ax;
- if (!dx && r < 0) return;
- r /= dx;
- if (dx < 0) {
- if (r > t1) return;
- if (r > t0) t0 = r;
- } else if (dx > 0) {
- if (r < t0) return;
- if (r < t1) t1 = r;
- }
-
- r = y0 - ay;
- if (!dy && r > 0) return;
- r /= dy;
- if (dy < 0) {
- if (r < t0) return;
- if (r < t1) t1 = r;
- } else if (dy > 0) {
- if (r > t1) return;
- if (r > t0) t0 = r;
- }
-
- r = y1 - ay;
- if (!dy && r < 0) return;
- r /= dy;
- if (dy < 0) {
- if (r > t1) return;
- if (r > t0) t0 = r;
- } else if (dy > 0) {
- if (r < t0) return;
- if (r < t1) t1 = r;
- }
-
- if (t0 > 0) line.a = {x: ax + t0 * dx, y: ay + t0 * dy};
- if (t1 < 1) line.b = {x: ax + t1 * dx, y: ay + t1 * dy};
- return line;
- };
-}
-
-var d3_geo_clipExtentMAX = 1e9;
-
-d3.geo.clipExtent = function() {
- var x0, y0, x1, y1,
- stream,
- clip,
- clipExtent = {
- stream: function(output) {
- if (stream) stream.valid = false;
- stream = clip(output);
- stream.valid = true; // allow caching by d3.geo.path
- return stream;
- },
- extent: function(_) {
- if (!arguments.length) return [[x0, y0], [x1, y1]];
- clip = d3_geo_clipExtent(x0 = +_[0][0], y0 = +_[0][1], x1 = +_[1][0], y1 = +_[1][1]);
- if (stream) stream.valid = false, stream = null;
- return clipExtent;
+ if (comparator) {
+ isCommon = false;
+ includes = arrayIncludesWith;
+ }
+ else if (length >= LARGE_ARRAY_SIZE) {
+ var set = iteratee ? null : createSet(array);
+ if (set) {
+ return setToArray(set);
}
- };
- return clipExtent.extent([[0, 0], [960, 500]]);
-};
-
-function d3_geo_clipExtent(x0, y0, x1, y1) {
- return function(listener) {
- var listener_ = listener,
- bufferListener = d3_geo_clipBufferListener(),
- clipLine = d3_geom_clipLine(x0, y0, x1, y1),
- segments,
- polygon,
- ring;
-
- var clip = {
- point: point,
- lineStart: lineStart,
- lineEnd: lineEnd,
- polygonStart: function() {
- listener = bufferListener;
- segments = [];
- polygon = [];
- clean = true;
- },
- polygonEnd: function() {
- listener = listener_;
- segments = d3.merge(segments);
- var clipStartInside = insidePolygon([x0, y1]),
- inside = clean && clipStartInside,
- visible = segments.length;
- if (inside || visible) {
- listener.polygonStart();
- if (inside) {
- listener.lineStart();
- interpolate(null, null, 1, listener);
- listener.lineEnd();
+ isCommon = false;
+ includes = cacheHas;
+ seen = new SetCache;
+ }
+ else {
+ seen = iteratee ? [] : result;
+ }
+ outer:
+ while (++index < length) {
+ var value = array[index],
+ computed = iteratee ? iteratee(value) : value;
+
+ value = (comparator || value !== 0) ? value : 0;
+ if (isCommon && computed === computed) {
+ var seenIndex = seen.length;
+ while (seenIndex--) {
+ if (seen[seenIndex] === computed) {
+ continue outer;
+ }
}
- if (visible) {
- d3_geo_clipPolygon(segments, compare, clipStartInside, interpolate, listener);
+ if (iteratee) {
+ seen.push(computed);
}
- listener.polygonEnd();
+ result.push(value);
}
- segments = polygon = ring = null;
- }
- };
-
- function insidePolygon(p) {
- var wn = 0, // the winding number counter
- n = polygon.length,
- y = p[1];
-
- for (var i = 0; i < n; ++i) {
- for (var j = 1, v = polygon[i], m = v.length, a = v[0], b; j < m; ++j) {
- b = v[j];
- if (a[1] <= y) {
- if (b[1] > y && d3_cross2d(a, b, p) > 0) ++wn;
- } else {
- if (b[1] <= y && d3_cross2d(a, b, p) < 0) --wn;
+ else if (!includes(seen, computed, comparator)) {
+ if (seen !== result) {
+ seen.push(computed);
}
- a = b;
+ result.push(value);
}
}
- return wn !== 0;
+ return result;
}
- function interpolate(from, to, direction, listener) {
- var a = 0, a1 = 0;
- if (from == null ||
- (a = corner(from, direction)) !== (a1 = corner(to, direction)) ||
- comparePoints(from, to) < 0 ^ direction > 0) {
- do {
- listener.point(a === 0 || a === 3 ? x0 : x1, a > 1 ? y1 : y0);
- } while ((a = (a + direction + 4) % 4) !== a1);
- } else {
- listener.point(to[0], to[1]);
- }
+ /**
+ * The base implementation of `_.unset`.
+ *
+ * @private
+ * @param {Object} object The object to modify.
+ * @param {Array|string} path The property path to unset.
+ * @returns {boolean} Returns `true` if the property is deleted, else `false`.
+ */
+ function baseUnset(object, path) {
+ path = castPath(path, object);
+ object = parent(object, path);
+ return object == null || delete object[toKey(last(path))];
}
- function pointVisible(x, y) {
- return x0 <= x && x <= x1 && y0 <= y && y <= y1;
+ /**
+ * The base implementation of `_.update`.
+ *
+ * @private
+ * @param {Object} object The object to modify.
+ * @param {Array|string} path The path of the property to update.
+ * @param {Function} updater The function to produce the updated value.
+ * @param {Function} [customizer] The function to customize path creation.
+ * @returns {Object} Returns `object`.
+ */
+ function baseUpdate(object, path, updater, customizer) {
+ return baseSet(object, path, updater(baseGet(object, path)), customizer);
}
- function point(x, y) {
- if (pointVisible(x, y)) listener.point(x, y);
- }
+ /**
+ * The base implementation of methods like `_.dropWhile` and `_.takeWhile`
+ * without support for iteratee shorthands.
+ *
+ * @private
+ * @param {Array} array The array to query.
+ * @param {Function} predicate The function invoked per iteration.
+ * @param {boolean} [isDrop] Specify dropping elements instead of taking them.
+ * @param {boolean} [fromRight] Specify iterating from right to left.
+ * @returns {Array} Returns the slice of `array`.
+ */
+ function baseWhile(array, predicate, isDrop, fromRight) {
+ var length = array.length,
+ index = fromRight ? length : -1;
- var x__, y__, v__, // first point
- x_, y_, v_, // previous point
- first,
- clean;
+ while ((fromRight ? index-- : ++index < length) &&
+ predicate(array[index], index, array)) {}
- function lineStart() {
- clip.point = linePoint;
- if (polygon) polygon.push(ring = []);
- first = true;
- v_ = false;
- x_ = y_ = NaN;
+ return isDrop
+ ? baseSlice(array, (fromRight ? 0 : index), (fromRight ? index + 1 : length))
+ : baseSlice(array, (fromRight ? index + 1 : 0), (fromRight ? length : index));
}
- function lineEnd() {
- // TODO rather than special-case polygons, simply handle them separately.
- // Ideally, coincident intersection points should be jittered to avoid
- // clipping issues.
- if (segments) {
- linePoint(x__, y__);
- if (v__ && v_) bufferListener.rejoin();
- segments.push(bufferListener.buffer());
+ /**
+ * The base implementation of `wrapperValue` which returns the result of
+ * performing a sequence of actions on the unwrapped `value`, where each
+ * successive action is supplied the return value of the previous.
+ *
+ * @private
+ * @param {*} value The unwrapped value.
+ * @param {Array} actions Actions to perform to resolve the unwrapped value.
+ * @returns {*} Returns the resolved value.
+ */
+ function baseWrapperValue(value, actions) {
+ var result = value;
+ if (result instanceof LazyWrapper) {
+ result = result.value();
}
- clip.point = point;
- if (v_) listener.lineEnd();
+ return arrayReduce(actions, function(result, action) {
+ return action.func.apply(action.thisArg, arrayPush([result], action.args));
+ }, result);
}
- function linePoint(x, y) {
- x = Math.max(-d3_geo_clipExtentMAX, Math.min(d3_geo_clipExtentMAX, x));
- y = Math.max(-d3_geo_clipExtentMAX, Math.min(d3_geo_clipExtentMAX, y));
- var v = pointVisible(x, y);
- if (polygon) ring.push([x, y]);
- if (first) {
- x__ = x, y__ = y, v__ = v;
- first = false;
- if (v) {
- listener.lineStart();
- listener.point(x, y);
- }
- } else {
- if (v && v_) listener.point(x, y);
- else {
- var l = {a: {x: x_, y: y_}, b: {x: x, y: y}};
- if (clipLine(l)) {
- if (!v_) {
- listener.lineStart();
- listener.point(l.a.x, l.a.y);
- }
- listener.point(l.b.x, l.b.y);
- if (!v) listener.lineEnd();
- clean = false;
- } else if (v) {
- listener.lineStart();
- listener.point(x, y);
- clean = false;
+ /**
+ * The base implementation of methods like `_.xor`, without support for
+ * iteratee shorthands, that accepts an array of arrays to inspect.
+ *
+ * @private
+ * @param {Array} arrays The arrays to inspect.
+ * @param {Function} [iteratee] The iteratee invoked per element.
+ * @param {Function} [comparator] The comparator invoked per element.
+ * @returns {Array} Returns the new array of values.
+ */
+ function baseXor(arrays, iteratee, comparator) {
+ var length = arrays.length;
+ if (length < 2) {
+ return length ? baseUniq(arrays[0]) : [];
+ }
+ var index = -1,
+ result = Array(length);
+
+ while (++index < length) {
+ var array = arrays[index],
+ othIndex = -1;
+
+ while (++othIndex < length) {
+ if (othIndex != index) {
+ result[index] = baseDifference(result[index] || array, arrays[othIndex], iteratee, comparator);
}
}
}
- x_ = x, y_ = y, v_ = v;
+ return baseUniq(baseFlatten(result, 1), iteratee, comparator);
}
- return clip;
- };
+ /**
+ * This base implementation of `_.zipObject` which assigns values using `assignFunc`.
+ *
+ * @private
+ * @param {Array} props The property identifiers.
+ * @param {Array} values The property values.
+ * @param {Function} assignFunc The function to assign values.
+ * @returns {Object} Returns the new object.
+ */
+ function baseZipObject(props, values, assignFunc) {
+ var index = -1,
+ length = props.length,
+ valsLength = values.length,
+ result = {};
- function corner(p, direction) {
- return abs(p[0] - x0) < ε ? direction > 0 ? 0 : 3
- : abs(p[0] - x1) < ε ? direction > 0 ? 2 : 1
- : abs(p[1] - y0) < ε ? direction > 0 ? 1 : 0
- : direction > 0 ? 3 : 2; // abs(p[1] - y1) < ε
- }
+ while (++index < length) {
+ var value = index < valsLength ? values[index] : undefined;
+ assignFunc(result, props[index], value);
+ }
+ return result;
+ }
- function compare(a, b) {
- return comparePoints(a.x, b.x);
- }
+ /**
+ * Casts `value` to an empty array if it's not an array like object.
+ *
+ * @private
+ * @param {*} value The value to inspect.
+ * @returns {Array|Object} Returns the cast array-like object.
+ */
+ function castArrayLikeObject(value) {
+ return isArrayLikeObject(value) ? value : [];
+ }
- function comparePoints(a, b) {
- var ca = corner(a, 1),
- cb = corner(b, 1);
- return ca !== cb ? ca - cb
- : ca === 0 ? b[1] - a[1]
- : ca === 1 ? a[0] - b[0]
- : ca === 2 ? a[1] - b[1]
- : b[0] - a[0];
- }
-}
+ /**
+ * Casts `value` to `identity` if it's not a function.
+ *
+ * @private
+ * @param {*} value The value to inspect.
+ * @returns {Function} Returns cast function.
+ */
+ function castFunction(value) {
+ return typeof value == 'function' ? value : identity;
+ }
-function d3_geo_conic(projectAt) {
- var Ï0 = 0,
- Ï1 = Ï / 3,
- m = d3_geo_projectionMutator(projectAt),
- p = m(Ï0, Ï1);
+ /**
+ * Casts `value` to a path array if it's not one.
+ *
+ * @private
+ * @param {*} value The value to inspect.
+ * @param {Object} [object] The object to query keys on.
+ * @returns {Array} Returns the cast property path array.
+ */
+ function castPath(value, object) {
+ if (isArray(value)) {
+ return value;
+ }
+ return isKey(value, object) ? [value] : stringToPath(toString(value));
+ }
- p.parallels = function(_) {
- if (!arguments.length) return [Ï0 / Ï * 180, Ï1 / Ï * 180];
- return m(Ï0 = _[0] * Ï / 180, Ï1 = _[1] * Ï / 180);
- };
+ /**
+ * A `baseRest` alias which can be replaced with `identity` by module
+ * replacement plugins.
+ *
+ * @private
+ * @type {Function}
+ * @param {Function} func The function to apply a rest parameter to.
+ * @returns {Function} Returns the new function.
+ */
+ var castRest = baseRest;
- return p;
-}
+ /**
+ * Casts `array` to a slice if it's needed.
+ *
+ * @private
+ * @param {Array} array The array to inspect.
+ * @param {number} start The start position.
+ * @param {number} [end=array.length] The end position.
+ * @returns {Array} Returns the cast slice.
+ */
+ function castSlice(array, start, end) {
+ var length = array.length;
+ end = end === undefined ? length : end;
+ return (!start && end >= length) ? array : baseSlice(array, start, end);
+ }
-function d3_geo_conicEqualArea(Ï0, Ï1) {
- var sinÏ0 = Math.sin(Ï0),
- n = (sinÏ0 + Math.sin(Ï1)) / 2,
- C = 1 + sinÏ0 * (2 * n - sinÏ0),
- Ï0 = Math.sqrt(C) / n;
+ /**
+ * A simple wrapper around the global [`clearTimeout`](https://mdn.io/clearTimeout).
+ *
+ * @private
+ * @param {number|Object} id The timer id or timeout object of the timer to clear.
+ */
+ var clearTimeout = ctxClearTimeout || function(id) {
+ return root.clearTimeout(id);
+ };
- function forward(λ, Ï) {
- var Ï = Math.sqrt(C - 2 * n * Math.sin(Ï)) / n;
- return [
- Ï * Math.sin(λ *= n),
- Ï0 - Ï * Math.cos(λ)
- ];
- }
+ /**
+ * Creates a clone of `buffer`.
+ *
+ * @private
+ * @param {Buffer} buffer The buffer to clone.
+ * @param {boolean} [isDeep] Specify a deep clone.
+ * @returns {Buffer} Returns the cloned buffer.
+ */
+ function cloneBuffer(buffer, isDeep) {
+ if (isDeep) {
+ return buffer.slice();
+ }
+ var length = buffer.length,
+ result = allocUnsafe ? allocUnsafe(length) : new buffer.constructor(length);
- forward.invert = function(x, y) {
- var Ï0_y = Ï0 - y;
- return [
- Math.atan2(x, Ï0_y) / n,
- d3_asin((C - (x * x + Ï0_y * Ï0_y) * n * n) / (2 * n))
- ];
- };
+ buffer.copy(result);
+ return result;
+ }
- return forward;
-}
+ /**
+ * Creates a clone of `arrayBuffer`.
+ *
+ * @private
+ * @param {ArrayBuffer} arrayBuffer The array buffer to clone.
+ * @returns {ArrayBuffer} Returns the cloned array buffer.
+ */
+ function cloneArrayBuffer(arrayBuffer) {
+ var result = new arrayBuffer.constructor(arrayBuffer.byteLength);
+ new Uint8Array(result).set(new Uint8Array(arrayBuffer));
+ return result;
+ }
-(d3.geo.conicEqualArea = function() {
- return d3_geo_conic(d3_geo_conicEqualArea);
-}).raw = d3_geo_conicEqualArea;
+ /**
+ * Creates a clone of `dataView`.
+ *
+ * @private
+ * @param {Object} dataView The data view to clone.
+ * @param {boolean} [isDeep] Specify a deep clone.
+ * @returns {Object} Returns the cloned data view.
+ */
+ function cloneDataView(dataView, isDeep) {
+ var buffer = isDeep ? cloneArrayBuffer(dataView.buffer) : dataView.buffer;
+ return new dataView.constructor(buffer, dataView.byteOffset, dataView.byteLength);
+ }
-// ESRI:102003
-d3.geo.albers = function() {
- return d3.geo.conicEqualArea()
- .rotate([96, 0])
- .center([-.6, 38.7])
- .parallels([29.5, 45.5])
- .scale(1070);
-};
+ /**
+ * Creates a clone of `map`.
+ *
+ * @private
+ * @param {Object} map The map to clone.
+ * @param {Function} cloneFunc The function to clone values.
+ * @param {boolean} [isDeep] Specify a deep clone.
+ * @returns {Object} Returns the cloned map.
+ */
+ function cloneMap(map, isDeep, cloneFunc) {
+ var array = isDeep ? cloneFunc(mapToArray(map), CLONE_DEEP_FLAG) : mapToArray(map);
+ return arrayReduce(array, addMapEntry, new map.constructor);
+ }
-// A composite projection for the United States, configured by default for
-// 960Ã500. Also works quite well at 960Ã600 with scale 1285. The set of
-// standard parallels for each region comes from USGS, which is published here:
-// http://egsc.usgs.gov/isb/pubs/MapProjections/projections.html#albers
-d3.geo.albersUsa = function() {
- var lower48 = d3.geo.albers();
-
- // EPSG:3338
- var alaska = d3.geo.conicEqualArea()
- .rotate([154, 0])
- .center([-2, 58.5])
- .parallels([55, 65]);
-
- // ESRI:102007
- var hawaii = d3.geo.conicEqualArea()
- .rotate([157, 0])
- .center([-3, 19.9])
- .parallels([8, 18]);
-
- var point,
- pointStream = {point: function(x, y) { point = [x, y]; }},
- lower48Point,
- alaskaPoint,
- hawaiiPoint;
+ /**
+ * Creates a clone of `regexp`.
+ *
+ * @private
+ * @param {Object} regexp The regexp to clone.
+ * @returns {Object} Returns the cloned regexp.
+ */
+ function cloneRegExp(regexp) {
+ var result = new regexp.constructor(regexp.source, reFlags.exec(regexp));
+ result.lastIndex = regexp.lastIndex;
+ return result;
+ }
- function albersUsa(coordinates) {
- var x = coordinates[0], y = coordinates[1];
- point = null;
- (lower48Point(x, y), point)
- || (alaskaPoint(x, y), point)
- || hawaiiPoint(x, y);
- return point;
- }
+ /**
+ * Creates a clone of `set`.
+ *
+ * @private
+ * @param {Object} set The set to clone.
+ * @param {Function} cloneFunc The function to clone values.
+ * @param {boolean} [isDeep] Specify a deep clone.
+ * @returns {Object} Returns the cloned set.
+ */
+ function cloneSet(set, isDeep, cloneFunc) {
+ var array = isDeep ? cloneFunc(setToArray(set), CLONE_DEEP_FLAG) : setToArray(set);
+ return arrayReduce(array, addSetEntry, new set.constructor);
+ }
- albersUsa.invert = function(coordinates) {
- var k = lower48.scale(),
- t = lower48.translate(),
- x = (coordinates[0] - t[0]) / k,
- y = (coordinates[1] - t[1]) / k;
- return (y >= .120 && y < .234 && x >= -.425 && x < -.214 ? alaska
- : y >= .166 && y < .234 && x >= -.214 && x < -.115 ? hawaii
- : lower48).invert(coordinates);
- };
+ /**
+ * Creates a clone of the `symbol` object.
+ *
+ * @private
+ * @param {Object} symbol The symbol object to clone.
+ * @returns {Object} Returns the cloned symbol object.
+ */
+ function cloneSymbol(symbol) {
+ return symbolValueOf ? Object(symbolValueOf.call(symbol)) : {};
+ }
- // A naïve multi-projection stream.
- // The projections must have mutually exclusive clip regions on the sphere,
- // as this will avoid emitting interleaving lines and polygons.
- albersUsa.stream = function(stream) {
- var lower48Stream = lower48.stream(stream),
- alaskaStream = alaska.stream(stream),
- hawaiiStream = hawaii.stream(stream);
- return {
- point: function(x, y) {
- lower48Stream.point(x, y);
- alaskaStream.point(x, y);
- hawaiiStream.point(x, y);
- },
- sphere: function() {
- lower48Stream.sphere();
- alaskaStream.sphere();
- hawaiiStream.sphere();
- },
- lineStart: function() {
- lower48Stream.lineStart();
- alaskaStream.lineStart();
- hawaiiStream.lineStart();
- },
- lineEnd: function() {
- lower48Stream.lineEnd();
- alaskaStream.lineEnd();
- hawaiiStream.lineEnd();
- },
- polygonStart: function() {
- lower48Stream.polygonStart();
- alaskaStream.polygonStart();
- hawaiiStream.polygonStart();
- },
- polygonEnd: function() {
- lower48Stream.polygonEnd();
- alaskaStream.polygonEnd();
- hawaiiStream.polygonEnd();
- }
- };
- };
-
- albersUsa.precision = function(_) {
- if (!arguments.length) return lower48.precision();
- lower48.precision(_);
- alaska.precision(_);
- hawaii.precision(_);
- return albersUsa;
- };
-
- albersUsa.scale = function(_) {
- if (!arguments.length) return lower48.scale();
- lower48.scale(_);
- alaska.scale(_ * .35);
- hawaii.scale(_);
- return albersUsa.translate(lower48.translate());
- };
-
- albersUsa.translate = function(_) {
- if (!arguments.length) return lower48.translate();
- var k = lower48.scale(), x = +_[0], y = +_[1];
-
- lower48Point = lower48
- .translate(_)
- .clipExtent([[x - .455 * k, y - .238 * k], [x + .455 * k, y + .238 * k]])
- .stream(pointStream).point;
-
- alaskaPoint = alaska
- .translate([x - .307 * k, y + .201 * k])
- .clipExtent([[x - .425 * k + ε, y + .120 * k + ε], [x - .214 * k - ε, y + .234 * k - ε]])
- .stream(pointStream).point;
-
- hawaiiPoint = hawaii
- .translate([x - .205 * k, y + .212 * k])
- .clipExtent([[x - .214 * k + ε, y + .166 * k + ε], [x - .115 * k - ε, y + .234 * k - ε]])
- .stream(pointStream).point;
+ /**
+ * Creates a clone of `typedArray`.
+ *
+ * @private
+ * @param {Object} typedArray The typed array to clone.
+ * @param {boolean} [isDeep] Specify a deep clone.
+ * @returns {Object} Returns the cloned typed array.
+ */
+ function cloneTypedArray(typedArray, isDeep) {
+ var buffer = isDeep ? cloneArrayBuffer(typedArray.buffer) : typedArray.buffer;
+ return new typedArray.constructor(buffer, typedArray.byteOffset, typedArray.length);
+ }
- return albersUsa;
- };
+ /**
+ * Compares values to sort them in ascending order.
+ *
+ * @private
+ * @param {*} value The value to compare.
+ * @param {*} other The other value to compare.
+ * @returns {number} Returns the sort order indicator for `value`.
+ */
+ function compareAscending(value, other) {
+ if (value !== other) {
+ var valIsDefined = value !== undefined,
+ valIsNull = value === null,
+ valIsReflexive = value === value,
+ valIsSymbol = isSymbol(value);
+
+ var othIsDefined = other !== undefined,
+ othIsNull = other === null,
+ othIsReflexive = other === other,
+ othIsSymbol = isSymbol(other);
+
+ if ((!othIsNull && !othIsSymbol && !valIsSymbol && value > other) ||
+ (valIsSymbol && othIsDefined && othIsReflexive && !othIsNull && !othIsSymbol) ||
+ (valIsNull && othIsDefined && othIsReflexive) ||
+ (!valIsDefined && othIsReflexive) ||
+ !valIsReflexive) {
+ return 1;
+ }
+ if ((!valIsNull && !valIsSymbol && !othIsSymbol && value < other) ||
+ (othIsSymbol && valIsDefined && valIsReflexive && !valIsNull && !valIsSymbol) ||
+ (othIsNull && valIsDefined && valIsReflexive) ||
+ (!othIsDefined && valIsReflexive) ||
+ !othIsReflexive) {
+ return -1;
+ }
+ }
+ return 0;
+ }
- return albersUsa.scale(1070);
-};
+ /**
+ * Used by `_.orderBy` to compare multiple properties of a value to another
+ * and stable sort them.
+ *
+ * If `orders` is unspecified, all values are sorted in ascending order. Otherwise,
+ * specify an order of "desc" for descending or "asc" for ascending sort order
+ * of corresponding values.
+ *
+ * @private
+ * @param {Object} object The object to compare.
+ * @param {Object} other The other object to compare.
+ * @param {boolean[]|string[]} orders The order to sort by for each property.
+ * @returns {number} Returns the sort order indicator for `object`.
+ */
+ function compareMultiple(object, other, orders) {
+ var index = -1,
+ objCriteria = object.criteria,
+ othCriteria = other.criteria,
+ length = objCriteria.length,
+ ordersLength = orders.length;
-d3.geo.bounds = (function() {
- var λ0, Ï0, λ1, Ï1, // bounds
- λ_, // previous λ-coordinate
- λ__, Ï__, // first point
- p0, // previous 3D point
- dλSum,
- ranges,
- range;
-
- var bound = {
- point: point,
- lineStart: lineStart,
- lineEnd: lineEnd,
-
- polygonStart: function() {
- bound.point = ringPoint;
- bound.lineStart = ringStart;
- bound.lineEnd = ringEnd;
- dλSum = 0;
- d3_geo_area.polygonStart();
- },
- polygonEnd: function() {
- d3_geo_area.polygonEnd();
- bound.point = point;
- bound.lineStart = lineStart;
- bound.lineEnd = lineEnd;
- if (d3_geo_areaRingSum < 0) λ0 = -(λ1 = 180), Ï0 = -(Ï1 = 90);
- else if (dλSum > ε) Ï1 = 90;
- else if (dλSum < -ε) Ï0 = -90;
- range[0] = λ0, range[1] = λ1;
- }
- };
-
- function point(λ, Ï) {
- ranges.push(range = [λ0 = λ, λ1 = λ]);
- if (Ï < Ï0) Ï0 = Ï;
- if (Ï > Ï1) Ï1 = Ï;
- }
-
- function linePoint(λ, Ï) {
- var p = d3_geo_cartesian([λ * d3_radians, Ï * d3_radians]);
- if (p0) {
- var normal = d3_geo_cartesianCross(p0, p),
- equatorial = [normal[1], -normal[0], 0],
- inflection = d3_geo_cartesianCross(equatorial, normal);
- d3_geo_cartesianNormalize(inflection);
- inflection = d3_geo_spherical(inflection);
- var dλ = λ - λ_,
- s = dλ > 0 ? 1 : -1,
- λi = inflection[0] * d3_degrees * s,
- antimeridian = abs(dλ) > 180;
- if (antimeridian ^ (s * λ_ < λi && λi < s * λ)) {
- var Ïi = inflection[1] * d3_degrees;
- if (Ïi > Ï1) Ï1 = Ïi;
- } else if (λi = (λi + 360) % 360 - 180, antimeridian ^ (s * λ_ < λi && λi < s * λ)) {
- var Ïi = -inflection[1] * d3_degrees;
- if (Ïi < Ï0) Ï0 = Ïi;
- } else {
- if (Ï < Ï0) Ï0 = Ï;
- if (Ï > Ï1) Ï1 = Ï;
- }
- if (antimeridian) {
- if (λ < λ_) {
- if (angle(λ0, λ) > angle(λ0, λ1)) λ1 = λ;
- } else {
- if (angle(λ, λ1) > angle(λ0, λ1)) λ0 = λ;
- }
- } else {
- if (λ1 >= λ0) {
- if (λ < λ0) λ0 = λ;
- if (λ > λ1) λ1 = λ;
- } else {
- if (λ > λ_) {
- if (angle(λ0, λ) > angle(λ0, λ1)) λ1 = λ;
- } else {
- if (angle(λ, λ1) > angle(λ0, λ1)) λ0 = λ;
+ while (++index < length) {
+ var result = compareAscending(objCriteria[index], othCriteria[index]);
+ if (result) {
+ if (index >= ordersLength) {
+ return result;
}
+ var order = orders[index];
+ return result * (order == 'desc' ? -1 : 1);
}
}
- } else {
- point(λ, Ï);
+ // Fixes an `Array#sort` bug in the JS engine embedded in Adobe applications
+ // that causes it, under certain circumstances, to provide the same value for
+ // `object` and `other`. See https://github.com/jashkenas/underscore/pull/1247
+ // for more details.
+ //
+ // This also ensures a stable sort in V8 and other engines.
+ // See https://bugs.chromium.org/p/v8/issues/detail?id=90 for more details.
+ return object.index - other.index;
}
- p0 = p, λ_ = λ;
- }
- function lineStart() { bound.point = linePoint; }
- function lineEnd() {
- range[0] = λ0, range[1] = λ1;
- bound.point = point;
- p0 = null;
- }
+ /**
+ * Creates an array that is the composition of partially applied arguments,
+ * placeholders, and provided arguments into a single array of arguments.
+ *
+ * @private
+ * @param {Array} args The provided arguments.
+ * @param {Array} partials The arguments to prepend to those provided.
+ * @param {Array} holders The `partials` placeholder indexes.
+ * @params {boolean} [isCurried] Specify composing for a curried function.
+ * @returns {Array} Returns the new array of composed arguments.
+ */
+ function composeArgs(args, partials, holders, isCurried) {
+ var argsIndex = -1,
+ argsLength = args.length,
+ holdersLength = holders.length,
+ leftIndex = -1,
+ leftLength = partials.length,
+ rangeLength = nativeMax(argsLength - holdersLength, 0),
+ result = Array(leftLength + rangeLength),
+ isUncurried = !isCurried;
- function ringPoint(λ, Ï) {
- if (p0) {
- var dλ = λ - λ_;
- dλSum += abs(dλ) > 180 ? dλ + (dλ > 0 ? 360 : -360) : dλ;
- } else λ__ = λ, Ï__ = Ï;
- d3_geo_area.point(λ, Ï);
- linePoint(λ, Ï);
- }
+ while (++leftIndex < leftLength) {
+ result[leftIndex] = partials[leftIndex];
+ }
+ while (++argsIndex < holdersLength) {
+ if (isUncurried || argsIndex < argsLength) {
+ result[holders[argsIndex]] = args[argsIndex];
+ }
+ }
+ while (rangeLength--) {
+ result[leftIndex++] = args[argsIndex++];
+ }
+ return result;
+ }
- function ringStart() {
- d3_geo_area.lineStart();
- }
+ /**
+ * This function is like `composeArgs` except that the arguments composition
+ * is tailored for `_.partialRight`.
+ *
+ * @private
+ * @param {Array} args The provided arguments.
+ * @param {Array} partials The arguments to append to those provided.
+ * @param {Array} holders The `partials` placeholder indexes.
+ * @params {boolean} [isCurried] Specify composing for a curried function.
+ * @returns {Array} Returns the new array of composed arguments.
+ */
+ function composeArgsRight(args, partials, holders, isCurried) {
+ var argsIndex = -1,
+ argsLength = args.length,
+ holdersIndex = -1,
+ holdersLength = holders.length,
+ rightIndex = -1,
+ rightLength = partials.length,
+ rangeLength = nativeMax(argsLength - holdersLength, 0),
+ result = Array(rangeLength + rightLength),
+ isUncurried = !isCurried;
+
+ while (++argsIndex < rangeLength) {
+ result[argsIndex] = args[argsIndex];
+ }
+ var offset = argsIndex;
+ while (++rightIndex < rightLength) {
+ result[offset + rightIndex] = partials[rightIndex];
+ }
+ while (++holdersIndex < holdersLength) {
+ if (isUncurried || argsIndex < argsLength) {
+ result[offset + holders[holdersIndex]] = args[argsIndex++];
+ }
+ }
+ return result;
+ }
- function ringEnd() {
- ringPoint(λ__, Ï__);
- d3_geo_area.lineEnd();
- if (abs(dλSum) > ε) λ0 = -(λ1 = 180);
- range[0] = λ0, range[1] = λ1;
- p0 = null;
- }
+ /**
+ * Copies the values of `source` to `array`.
+ *
+ * @private
+ * @param {Array} source The array to copy values from.
+ * @param {Array} [array=[]] The array to copy values to.
+ * @returns {Array} Returns `array`.
+ */
+ function copyArray(source, array) {
+ var index = -1,
+ length = source.length;
- // Finds the left-right distance between two longitudes.
- // This is almost the same as (λ1 - λ0 + 360°) % 360°, except that we want
- // the distance between ±180° to be 360°.
- function angle(λ0, λ1) { return (λ1 -= λ0) < 0 ? λ1 + 360 : λ1; }
+ array || (array = Array(length));
+ while (++index < length) {
+ array[index] = source[index];
+ }
+ return array;
+ }
- function compareRanges(a, b) { return a[0] - b[0]; }
+ /**
+ * Copies properties of `source` to `object`.
+ *
+ * @private
+ * @param {Object} source The object to copy properties from.
+ * @param {Array} props The property identifiers to copy.
+ * @param {Object} [object={}] The object to copy properties to.
+ * @param {Function} [customizer] The function to customize copied values.
+ * @returns {Object} Returns `object`.
+ */
+ function copyObject(source, props, object, customizer) {
+ var isNew = !object;
+ object || (object = {});
- function withinRange(x, range) {
- return range[0] <= range[1] ? range[0] <= x && x <= range[1] : x < range[0] || range[1] < x;
- }
+ var index = -1,
+ length = props.length;
- return function(feature) {
- Ï1 = λ1 = -(λ0 = Ï0 = Infinity);
- ranges = [];
+ while (++index < length) {
+ var key = props[index];
- d3.geo.stream(feature, bound);
+ var newValue = customizer
+ ? customizer(object[key], source[key], key, object, source)
+ : undefined;
- var n = ranges.length;
- if (n) {
- // First, sort ranges by their minimum longitudes.
- ranges.sort(compareRanges);
-
- // Then, merge any ranges that overlap.
- for (var i = 1, a = ranges[0], b, merged = [a]; i < n; ++i) {
- b = ranges[i];
- if (withinRange(b[0], a) || withinRange(b[1], a)) {
- if (angle(a[0], b[1]) > angle(a[0], a[1])) a[1] = b[1];
- if (angle(b[0], a[1]) > angle(a[0], a[1])) a[0] = b[0];
+ if (newValue === undefined) {
+ newValue = source[key];
+ }
+ if (isNew) {
+ baseAssignValue(object, key, newValue);
} else {
- merged.push(a = b);
+ assignValue(object, key, newValue);
}
}
-
- // Finally, find the largest gap between the merged ranges.
- // The final bounding box will be the inverse of this gap.
- var best = -Infinity, dλ;
- for (var n = merged.length - 1, i = 0, a = merged[n], b; i <= n; a = b, ++i) {
- b = merged[i];
- if ((dλ = angle(a[1], b[0])) > best) best = dλ, λ0 = b[0], λ1 = a[1];
- }
+ return object;
}
- ranges = range = null;
- return λ0 === Infinity || Ï0 === Infinity
- ? [[NaN, NaN], [NaN, NaN]]
- : [[λ0, Ï0], [λ1, Ï1]];
- };
-})();
+ /**
+ * Copies own symbols of `source` to `object`.
+ *
+ * @private
+ * @param {Object} source The object to copy symbols from.
+ * @param {Object} [object={}] The object to copy symbols to.
+ * @returns {Object} Returns `object`.
+ */
+ function copySymbols(source, object) {
+ return copyObject(source, getSymbols(source), object);
+ }
-d3.geo.centroid = function(object) {
- d3_geo_centroidW0 = d3_geo_centroidW1 =
- d3_geo_centroidX0 = d3_geo_centroidY0 = d3_geo_centroidZ0 =
- d3_geo_centroidX1 = d3_geo_centroidY1 = d3_geo_centroidZ1 =
- d3_geo_centroidX2 = d3_geo_centroidY2 = d3_geo_centroidZ2 = 0;
- d3.geo.stream(object, d3_geo_centroid);
+ /**
+ * Copies own and inherited symbols of `source` to `object`.
+ *
+ * @private
+ * @param {Object} source The object to copy symbols from.
+ * @param {Object} [object={}] The object to copy symbols to.
+ * @returns {Object} Returns `object`.
+ */
+ function copySymbolsIn(source, object) {
+ return copyObject(source, getSymbolsIn(source), object);
+ }
- var x = d3_geo_centroidX2,
- y = d3_geo_centroidY2,
- z = d3_geo_centroidZ2,
- m = x * x + y * y + z * z;
+ /**
+ * Creates a function like `_.groupBy`.
+ *
+ * @private
+ * @param {Function} setter The function to set accumulator values.
+ * @param {Function} [initializer] The accumulator object initializer.
+ * @returns {Function} Returns the new aggregator function.
+ */
+ function createAggregator(setter, initializer) {
+ return function(collection, iteratee) {
+ var func = isArray(collection) ? arrayAggregator : baseAggregator,
+ accumulator = initializer ? initializer() : {};
- // If the area-weighted centroid is undefined, fall back to length-weighted centroid.
- if (m < ε2) {
- x = d3_geo_centroidX1, y = d3_geo_centroidY1, z = d3_geo_centroidZ1;
- // If the feature has zero length, fall back to arithmetic mean of point vectors.
- if (d3_geo_centroidW1 < ε) x = d3_geo_centroidX0, y = d3_geo_centroidY0, z = d3_geo_centroidZ0;
- m = x * x + y * y + z * z;
- // If the feature still has an undefined centroid, then return.
- if (m < ε2) return [NaN, NaN];
- }
-
- return [Math.atan2(y, x) * d3_degrees, d3_asin(z / Math.sqrt(m)) * d3_degrees];
-};
-
-var d3_geo_centroidW0,
- d3_geo_centroidW1,
- d3_geo_centroidX0,
- d3_geo_centroidY0,
- d3_geo_centroidZ0,
- d3_geo_centroidX1,
- d3_geo_centroidY1,
- d3_geo_centroidZ1,
- d3_geo_centroidX2,
- d3_geo_centroidY2,
- d3_geo_centroidZ2;
-
-var d3_geo_centroid = {
- sphere: d3_noop,
- point: d3_geo_centroidPoint,
- lineStart: d3_geo_centroidLineStart,
- lineEnd: d3_geo_centroidLineEnd,
- polygonStart: function() {
- d3_geo_centroid.lineStart = d3_geo_centroidRingStart;
- },
- polygonEnd: function() {
- d3_geo_centroid.lineStart = d3_geo_centroidLineStart;
- }
-};
+ return func(collection, setter, getIteratee(iteratee, 2), accumulator);
+ };
+ }
-// Arithmetic mean of Cartesian vectors.
-function d3_geo_centroidPoint(λ, Ï) {
- λ *= d3_radians;
- var cosÏ = Math.cos(Ï *= d3_radians);
- d3_geo_centroidPointXYZ(cosÏ * Math.cos(λ), cosÏ * Math.sin(λ), Math.sin(Ï));
-}
+ /**
+ * Creates a function like `_.assign`.
+ *
+ * @private
+ * @param {Function} assigner The function to assign values.
+ * @returns {Function} Returns the new assigner function.
+ */
+ function createAssigner(assigner) {
+ return baseRest(function(object, sources) {
+ var index = -1,
+ length = sources.length,
+ customizer = length > 1 ? sources[length - 1] : undefined,
+ guard = length > 2 ? sources[2] : undefined;
-function d3_geo_centroidPointXYZ(x, y, z) {
- ++d3_geo_centroidW0;
- d3_geo_centroidX0 += (x - d3_geo_centroidX0) / d3_geo_centroidW0;
- d3_geo_centroidY0 += (y - d3_geo_centroidY0) / d3_geo_centroidW0;
- d3_geo_centroidZ0 += (z - d3_geo_centroidZ0) / d3_geo_centroidW0;
-}
+ customizer = (assigner.length > 3 && typeof customizer == 'function')
+ ? (length--, customizer)
+ : undefined;
-function d3_geo_centroidLineStart() {
- var x0, y0, z0; // previous point
+ if (guard && isIterateeCall(sources[0], sources[1], guard)) {
+ customizer = length < 3 ? undefined : customizer;
+ length = 1;
+ }
+ object = Object(object);
+ while (++index < length) {
+ var source = sources[index];
+ if (source) {
+ assigner(object, source, index, customizer);
+ }
+ }
+ return object;
+ });
+ }
- d3_geo_centroid.point = function(λ, Ï) {
- λ *= d3_radians;
- var cosÏ = Math.cos(Ï *= d3_radians);
- x0 = cosÏ * Math.cos(λ);
- y0 = cosÏ * Math.sin(λ);
- z0 = Math.sin(Ï);
- d3_geo_centroid.point = nextPoint;
- d3_geo_centroidPointXYZ(x0, y0, z0);
- };
+ /**
+ * Creates a `baseEach` or `baseEachRight` function.
+ *
+ * @private
+ * @param {Function} eachFunc The function to iterate over a collection.
+ * @param {boolean} [fromRight] Specify iterating from right to left.
+ * @returns {Function} Returns the new base function.
+ */
+ function createBaseEach(eachFunc, fromRight) {
+ return function(collection, iteratee) {
+ if (collection == null) {
+ return collection;
+ }
+ if (!isArrayLike(collection)) {
+ return eachFunc(collection, iteratee);
+ }
+ var length = collection.length,
+ index = fromRight ? length : -1,
+ iterable = Object(collection);
- function nextPoint(λ, Ï) {
- λ *= d3_radians;
- var cosÏ = Math.cos(Ï *= d3_radians),
- x = cosÏ * Math.cos(λ),
- y = cosÏ * Math.sin(λ),
- z = Math.sin(Ï),
- w = Math.atan2(
- Math.sqrt((w = y0 * z - z0 * y) * w + (w = z0 * x - x0 * z) * w + (w = x0 * y - y0 * x) * w),
- x0 * x + y0 * y + z0 * z);
- d3_geo_centroidW1 += w;
- d3_geo_centroidX1 += w * (x0 + (x0 = x));
- d3_geo_centroidY1 += w * (y0 + (y0 = y));
- d3_geo_centroidZ1 += w * (z0 + (z0 = z));
- d3_geo_centroidPointXYZ(x0, y0, z0);
- }
-}
+ while ((fromRight ? index-- : ++index < length)) {
+ if (iteratee(iterable[index], index, iterable) === false) {
+ break;
+ }
+ }
+ return collection;
+ };
+ }
-function d3_geo_centroidLineEnd() {
- d3_geo_centroid.point = d3_geo_centroidPoint;
-}
+ /**
+ * Creates a base function for methods like `_.forIn` and `_.forOwn`.
+ *
+ * @private
+ * @param {boolean} [fromRight] Specify iterating from right to left.
+ * @returns {Function} Returns the new base function.
+ */
+ function createBaseFor(fromRight) {
+ return function(object, iteratee, keysFunc) {
+ var index = -1,
+ iterable = Object(object),
+ props = keysFunc(object),
+ length = props.length;
+
+ while (length--) {
+ var key = props[fromRight ? length : ++index];
+ if (iteratee(iterable[key], key, iterable) === false) {
+ break;
+ }
+ }
+ return object;
+ };
+ }
-// See J. E. Brock, The Inertia Tensor for a Spherical Triangle,
-// J. Applied Mechanics 42, 239 (1975).
-function d3_geo_centroidRingStart() {
- var λ00, Ï00, // first point
- x0, y0, z0; // previous point
-
- d3_geo_centroid.point = function(λ, Ï) {
- λ00 = λ, Ï00 = Ï;
- d3_geo_centroid.point = nextPoint;
- λ *= d3_radians;
- var cosÏ = Math.cos(Ï *= d3_radians);
- x0 = cosÏ * Math.cos(λ);
- y0 = cosÏ * Math.sin(λ);
- z0 = Math.sin(Ï);
- d3_geo_centroidPointXYZ(x0, y0, z0);
- };
-
- d3_geo_centroid.lineEnd = function() {
- nextPoint(λ00, Ï00);
- d3_geo_centroid.lineEnd = d3_geo_centroidLineEnd;
- d3_geo_centroid.point = d3_geo_centroidPoint;
- };
-
- function nextPoint(λ, Ï) {
- λ *= d3_radians;
- var cosÏ = Math.cos(Ï *= d3_radians),
- x = cosÏ * Math.cos(λ),
- y = cosÏ * Math.sin(λ),
- z = Math.sin(Ï),
- cx = y0 * z - z0 * y,
- cy = z0 * x - x0 * z,
- cz = x0 * y - y0 * x,
- m = Math.sqrt(cx * cx + cy * cy + cz * cz),
- u = x0 * x + y0 * y + z0 * z,
- v = m && -d3_acos(u) / m, // area weight
- w = Math.atan2(m, u); // line weight
- d3_geo_centroidX2 += v * cx;
- d3_geo_centroidY2 += v * cy;
- d3_geo_centroidZ2 += v * cz;
- d3_geo_centroidW1 += w;
- d3_geo_centroidX1 += w * (x0 + (x0 = x));
- d3_geo_centroidY1 += w * (y0 + (y0 = y));
- d3_geo_centroidZ1 += w * (z0 + (z0 = z));
- d3_geo_centroidPointXYZ(x0, y0, z0);
- }
-}
-
-// TODO Unify this code with d3.geom.polygon area?
-
-var d3_geo_pathAreaSum, d3_geo_pathAreaPolygon, d3_geo_pathArea = {
- point: d3_noop,
- lineStart: d3_noop,
- lineEnd: d3_noop,
-
- // Only count area for polygon rings.
- polygonStart: function() {
- d3_geo_pathAreaPolygon = 0;
- d3_geo_pathArea.lineStart = d3_geo_pathAreaRingStart;
- },
- polygonEnd: function() {
- d3_geo_pathArea.lineStart = d3_geo_pathArea.lineEnd = d3_geo_pathArea.point = d3_noop;
- d3_geo_pathAreaSum += abs(d3_geo_pathAreaPolygon / 2);
- }
-};
+ /**
+ * Creates a function that wraps `func` to invoke it with the optional `this`
+ * binding of `thisArg`.
+ *
+ * @private
+ * @param {Function} func The function to wrap.
+ * @param {number} bitmask The bitmask flags. See `createWrap` for more details.
+ * @param {*} [thisArg] The `this` binding of `func`.
+ * @returns {Function} Returns the new wrapped function.
+ */
+ function createBind(func, bitmask, thisArg) {
+ var isBind = bitmask & WRAP_BIND_FLAG,
+ Ctor = createCtor(func);
-function d3_geo_pathAreaRingStart() {
- var x00, y00, x0, y0;
+ function wrapper() {
+ var fn = (this && this !== root && this instanceof wrapper) ? Ctor : func;
+ return fn.apply(isBind ? thisArg : this, arguments);
+ }
+ return wrapper;
+ }
- // For the first point, â¦
- d3_geo_pathArea.point = function(x, y) {
- d3_geo_pathArea.point = nextPoint;
- x00 = x0 = x, y00 = y0 = y;
- };
+ /**
+ * Creates a function like `_.lowerFirst`.
+ *
+ * @private
+ * @param {string} methodName The name of the `String` case method to use.
+ * @returns {Function} Returns the new case function.
+ */
+ function createCaseFirst(methodName) {
+ return function(string) {
+ string = toString(string);
- // For subsequent points, â¦
- function nextPoint(x, y) {
- d3_geo_pathAreaPolygon += y0 * x - x0 * y;
- x0 = x, y0 = y;
- }
+ var strSymbols = hasUnicode(string)
+ ? stringToArray(string)
+ : undefined;
- // For the last point, return to the start.
- d3_geo_pathArea.lineEnd = function() {
- nextPoint(x00, y00);
- };
-}
+ var chr = strSymbols
+ ? strSymbols[0]
+ : string.charAt(0);
-var d3_geo_pathBoundsX0,
- d3_geo_pathBoundsY0,
- d3_geo_pathBoundsX1,
- d3_geo_pathBoundsY1;
+ var trailing = strSymbols
+ ? castSlice(strSymbols, 1).join('')
+ : string.slice(1);
-var d3_geo_pathBounds = {
- point: d3_geo_pathBoundsPoint,
- lineStart: d3_noop,
- lineEnd: d3_noop,
- polygonStart: d3_noop,
- polygonEnd: d3_noop
-};
+ return chr[methodName]() + trailing;
+ };
+ }
-function d3_geo_pathBoundsPoint(x, y) {
- if (x < d3_geo_pathBoundsX0) d3_geo_pathBoundsX0 = x;
- if (x > d3_geo_pathBoundsX1) d3_geo_pathBoundsX1 = x;
- if (y < d3_geo_pathBoundsY0) d3_geo_pathBoundsY0 = y;
- if (y > d3_geo_pathBoundsY1) d3_geo_pathBoundsY1 = y;
-}
-function d3_geo_pathBuffer() {
- var pointCircle = d3_geo_pathBufferCircle(4.5),
- buffer = [];
+ /**
+ * Creates a function like `_.camelCase`.
+ *
+ * @private
+ * @param {Function} callback The function to combine each word.
+ * @returns {Function} Returns the new compounder function.
+ */
+ function createCompounder(callback) {
+ return function(string) {
+ return arrayReduce(words(deburr(string).replace(reApos, '')), callback, '');
+ };
+ }
- var stream = {
- point: point,
+ /**
+ * Creates a function that produces an instance of `Ctor` regardless of
+ * whether it was invoked as part of a `new` expression or by `call` or `apply`.
+ *
+ * @private
+ * @param {Function} Ctor The constructor to wrap.
+ * @returns {Function} Returns the new wrapped function.
+ */
+ function createCtor(Ctor) {
+ return function() {
+ // Use a `switch` statement to work with class constructors. See
+ // http://ecma-international.org/ecma-262/7.0/#sec-ecmascript-function-objects-call-thisargument-argumentslist
+ // for more details.
+ var args = arguments;
+ switch (args.length) {
+ case 0: return new Ctor;
+ case 1: return new Ctor(args[0]);
+ case 2: return new Ctor(args[0], args[1]);
+ case 3: return new Ctor(args[0], args[1], args[2]);
+ case 4: return new Ctor(args[0], args[1], args[2], args[3]);
+ case 5: return new Ctor(args[0], args[1], args[2], args[3], args[4]);
+ case 6: return new Ctor(args[0], args[1], args[2], args[3], args[4], args[5]);
+ case 7: return new Ctor(args[0], args[1], args[2], args[3], args[4], args[5], args[6]);
+ }
+ var thisBinding = baseCreate(Ctor.prototype),
+ result = Ctor.apply(thisBinding, args);
+
+ // Mimic the constructor's `return` behavior.
+ // See https://es5.github.io/#x13.2.2 for more details.
+ return isObject(result) ? result : thisBinding;
+ };
+ }
- // While inside a line, override point to moveTo then lineTo.
- lineStart: function() { stream.point = pointLineStart; },
- lineEnd: lineEnd,
+ /**
+ * Creates a function that wraps `func` to enable currying.
+ *
+ * @private
+ * @param {Function} func The function to wrap.
+ * @param {number} bitmask The bitmask flags. See `createWrap` for more details.
+ * @param {number} arity The arity of `func`.
+ * @returns {Function} Returns the new wrapped function.
+ */
+ function createCurry(func, bitmask, arity) {
+ var Ctor = createCtor(func);
- // While inside a polygon, override lineEnd to closePath.
- polygonStart: function() { stream.lineEnd = lineEndPolygon; },
- polygonEnd: function() { stream.lineEnd = lineEnd; stream.point = point; },
+ function wrapper() {
+ var length = arguments.length,
+ args = Array(length),
+ index = length,
+ placeholder = getHolder(wrapper);
- pointRadius: function(_) {
- pointCircle = d3_geo_pathBufferCircle(_);
- return stream;
- },
+ while (index--) {
+ args[index] = arguments[index];
+ }
+ var holders = (length < 3 && args[0] !== placeholder && args[length - 1] !== placeholder)
+ ? []
+ : replaceHolders(args, placeholder);
- result: function() {
- if (buffer.length) {
- var result = buffer.join("");
- buffer = [];
- return result;
+ length -= holders.length;
+ if (length < arity) {
+ return createRecurry(
+ func, bitmask, createHybrid, wrapper.placeholder, undefined,
+ args, holders, undefined, undefined, arity - length);
+ }
+ var fn = (this && this !== root && this instanceof wrapper) ? Ctor : func;
+ return apply(fn, this, args);
}
+ return wrapper;
}
- };
- function point(x, y) {
- buffer.push("M", x, ",", y, pointCircle);
- }
+ /**
+ * Creates a `_.find` or `_.findLast` function.
+ *
+ * @private
+ * @param {Function} findIndexFunc The function to find the collection index.
+ * @returns {Function} Returns the new find function.
+ */
+ function createFind(findIndexFunc) {
+ return function(collection, predicate, fromIndex) {
+ var iterable = Object(collection);
+ if (!isArrayLike(collection)) {
+ var iteratee = getIteratee(predicate, 3);
+ collection = keys(collection);
+ predicate = function(key) { return iteratee(iterable[key], key, iterable); };
+ }
+ var index = findIndexFunc(collection, predicate, fromIndex);
+ return index > -1 ? iterable[iteratee ? collection[index] : index] : undefined;
+ };
+ }
- function pointLineStart(x, y) {
- buffer.push("M", x, ",", y);
- stream.point = pointLine;
- }
+ /**
+ * Creates a `_.flow` or `_.flowRight` function.
+ *
+ * @private
+ * @param {boolean} [fromRight] Specify iterating from right to left.
+ * @returns {Function} Returns the new flow function.
+ */
+ function createFlow(fromRight) {
+ return flatRest(function(funcs) {
+ var length = funcs.length,
+ index = length,
+ prereq = LodashWrapper.prototype.thru;
+
+ if (fromRight) {
+ funcs.reverse();
+ }
+ while (index--) {
+ var func = funcs[index];
+ if (typeof func != 'function') {
+ throw new TypeError(FUNC_ERROR_TEXT);
+ }
+ if (prereq && !wrapper && getFuncName(func) == 'wrapper') {
+ var wrapper = new LodashWrapper([], true);
+ }
+ }
+ index = wrapper ? index : length;
+ while (++index < length) {
+ func = funcs[index];
- function pointLine(x, y) {
- buffer.push("L", x, ",", y);
- }
+ var funcName = getFuncName(func),
+ data = funcName == 'wrapper' ? getData(func) : undefined;
- function lineEnd() {
- stream.point = point;
- }
+ if (data && isLaziable(data[0]) &&
+ data[1] == (WRAP_ARY_FLAG | WRAP_CURRY_FLAG | WRAP_PARTIAL_FLAG | WRAP_REARG_FLAG) &&
+ !data[4].length && data[9] == 1
+ ) {
+ wrapper = wrapper[getFuncName(data[0])].apply(wrapper, data[3]);
+ } else {
+ wrapper = (func.length == 1 && isLaziable(func))
+ ? wrapper[funcName]()
+ : wrapper.thru(func);
+ }
+ }
+ return function() {
+ var args = arguments,
+ value = args[0];
- function lineEndPolygon() {
- buffer.push("Z");
- }
+ if (wrapper && args.length == 1 && isArray(value)) {
+ return wrapper.plant(value).value();
+ }
+ var index = 0,
+ result = length ? funcs[index].apply(this, args) : value;
- return stream;
-}
+ while (++index < length) {
+ result = funcs[index].call(this, result);
+ }
+ return result;
+ };
+ });
+ }
-function d3_geo_pathBufferCircle(radius) {
- return "m0," + radius
- + "a" + radius + "," + radius + " 0 1,1 0," + -2 * radius
- + "a" + radius + "," + radius + " 0 1,1 0," + 2 * radius
- + "z";
-}
+ /**
+ * Creates a function that wraps `func` to invoke it with optional `this`
+ * binding of `thisArg`, partial application, and currying.
+ *
+ * @private
+ * @param {Function|string} func The function or method name to wrap.
+ * @param {number} bitmask The bitmask flags. See `createWrap` for more details.
+ * @param {*} [thisArg] The `this` binding of `func`.
+ * @param {Array} [partials] The arguments to prepend to those provided to
+ * the new function.
+ * @param {Array} [holders] The `partials` placeholder indexes.
+ * @param {Array} [partialsRight] The arguments to append to those provided
+ * to the new function.
+ * @param {Array} [holdersRight] The `partialsRight` placeholder indexes.
+ * @param {Array} [argPos] The argument positions of the new function.
+ * @param {number} [ary] The arity cap of `func`.
+ * @param {number} [arity] The arity of `func`.
+ * @returns {Function} Returns the new wrapped function.
+ */
+ function createHybrid(func, bitmask, thisArg, partials, holders, partialsRight, holdersRight, argPos, ary, arity) {
+ var isAry = bitmask & WRAP_ARY_FLAG,
+ isBind = bitmask & WRAP_BIND_FLAG,
+ isBindKey = bitmask & WRAP_BIND_KEY_FLAG,
+ isCurried = bitmask & (WRAP_CURRY_FLAG | WRAP_CURRY_RIGHT_FLAG),
+ isFlip = bitmask & WRAP_FLIP_FLAG,
+ Ctor = isBindKey ? undefined : createCtor(func);
+
+ function wrapper() {
+ var length = arguments.length,
+ args = Array(length),
+ index = length;
+
+ while (index--) {
+ args[index] = arguments[index];
+ }
+ if (isCurried) {
+ var placeholder = getHolder(wrapper),
+ holdersCount = countHolders(args, placeholder);
+ }
+ if (partials) {
+ args = composeArgs(args, partials, holders, isCurried);
+ }
+ if (partialsRight) {
+ args = composeArgsRight(args, partialsRight, holdersRight, isCurried);
+ }
+ length -= holdersCount;
+ if (isCurried && length < arity) {
+ var newHolders = replaceHolders(args, placeholder);
+ return createRecurry(
+ func, bitmask, createHybrid, wrapper.placeholder, thisArg,
+ args, newHolders, argPos, ary, arity - length
+ );
+ }
+ var thisBinding = isBind ? thisArg : this,
+ fn = isBindKey ? thisBinding[func] : func;
+
+ length = args.length;
+ if (argPos) {
+ args = reorder(args, argPos);
+ } else if (isFlip && length > 1) {
+ args.reverse();
+ }
+ if (isAry && ary < length) {
+ args.length = ary;
+ }
+ if (this && this !== root && this instanceof wrapper) {
+ fn = Ctor || createCtor(fn);
+ }
+ return fn.apply(thisBinding, args);
+ }
+ return wrapper;
+ }
-// TODO Unify this code with d3.geom.polygon centroid?
-// TODO Enforce positive area for exterior, negative area for interior?
+ /**
+ * Creates a function like `_.invertBy`.
+ *
+ * @private
+ * @param {Function} setter The function to set accumulator values.
+ * @param {Function} toIteratee The function to resolve iteratees.
+ * @returns {Function} Returns the new inverter function.
+ */
+ function createInverter(setter, toIteratee) {
+ return function(object, iteratee) {
+ return baseInverter(object, setter, toIteratee(iteratee), {});
+ };
+ }
-var d3_geo_pathCentroid = {
- point: d3_geo_pathCentroidPoint,
+ /**
+ * Creates a function that performs a mathematical operation on two values.
+ *
+ * @private
+ * @param {Function} operator The function to perform the operation.
+ * @param {number} [defaultValue] The value used for `undefined` arguments.
+ * @returns {Function} Returns the new mathematical operation function.
+ */
+ function createMathOperation(operator, defaultValue) {
+ return function(value, other) {
+ var result;
+ if (value === undefined && other === undefined) {
+ return defaultValue;
+ }
+ if (value !== undefined) {
+ result = value;
+ }
+ if (other !== undefined) {
+ if (result === undefined) {
+ return other;
+ }
+ if (typeof value == 'string' || typeof other == 'string') {
+ value = baseToString(value);
+ other = baseToString(other);
+ } else {
+ value = baseToNumber(value);
+ other = baseToNumber(other);
+ }
+ result = operator(value, other);
+ }
+ return result;
+ };
+ }
- // For lines, weight by length.
- lineStart: d3_geo_pathCentroidLineStart,
- lineEnd: d3_geo_pathCentroidLineEnd,
+ /**
+ * Creates a function like `_.over`.
+ *
+ * @private
+ * @param {Function} arrayFunc The function to iterate over iteratees.
+ * @returns {Function} Returns the new over function.
+ */
+ function createOver(arrayFunc) {
+ return flatRest(function(iteratees) {
+ iteratees = arrayMap(iteratees, baseUnary(getIteratee()));
+ return baseRest(function(args) {
+ var thisArg = this;
+ return arrayFunc(iteratees, function(iteratee) {
+ return apply(iteratee, thisArg, args);
+ });
+ });
+ });
+ }
- // For polygons, weight by area.
- polygonStart: function() {
- d3_geo_pathCentroid.lineStart = d3_geo_pathCentroidRingStart;
- },
- polygonEnd: function() {
- d3_geo_pathCentroid.point = d3_geo_pathCentroidPoint;
- d3_geo_pathCentroid.lineStart = d3_geo_pathCentroidLineStart;
- d3_geo_pathCentroid.lineEnd = d3_geo_pathCentroidLineEnd;
- }
-};
+ /**
+ * Creates the padding for `string` based on `length`. The `chars` string
+ * is truncated if the number of characters exceeds `length`.
+ *
+ * @private
+ * @param {number} length The padding length.
+ * @param {string} [chars=' '] The string used as padding.
+ * @returns {string} Returns the padding for `string`.
+ */
+ function createPadding(length, chars) {
+ chars = chars === undefined ? ' ' : baseToString(chars);
-function d3_geo_pathCentroidPoint(x, y) {
- d3_geo_centroidX0 += x;
- d3_geo_centroidY0 += y;
- ++d3_geo_centroidZ0;
-}
+ var charsLength = chars.length;
+ if (charsLength < 2) {
+ return charsLength ? baseRepeat(chars, length) : chars;
+ }
+ var result = baseRepeat(chars, nativeCeil(length / stringSize(chars)));
+ return hasUnicode(chars)
+ ? castSlice(stringToArray(result), 0, length).join('')
+ : result.slice(0, length);
+ }
-function d3_geo_pathCentroidLineStart() {
- var x0, y0;
+ /**
+ * Creates a function that wraps `func` to invoke it with the `this` binding
+ * of `thisArg` and `partials` prepended to the arguments it receives.
+ *
+ * @private
+ * @param {Function} func The function to wrap.
+ * @param {number} bitmask The bitmask flags. See `createWrap` for more details.
+ * @param {*} thisArg The `this` binding of `func`.
+ * @param {Array} partials The arguments to prepend to those provided to
+ * the new function.
+ * @returns {Function} Returns the new wrapped function.
+ */
+ function createPartial(func, bitmask, thisArg, partials) {
+ var isBind = bitmask & WRAP_BIND_FLAG,
+ Ctor = createCtor(func);
- d3_geo_pathCentroid.point = function(x, y) {
- d3_geo_pathCentroid.point = nextPoint;
- d3_geo_pathCentroidPoint(x0 = x, y0 = y);
- };
+ function wrapper() {
+ var argsIndex = -1,
+ argsLength = arguments.length,
+ leftIndex = -1,
+ leftLength = partials.length,
+ args = Array(leftLength + argsLength),
+ fn = (this && this !== root && this instanceof wrapper) ? Ctor : func;
- function nextPoint(x, y) {
- var dx = x - x0, dy = y - y0, z = Math.sqrt(dx * dx + dy * dy);
- d3_geo_centroidX1 += z * (x0 + x) / 2;
- d3_geo_centroidY1 += z * (y0 + y) / 2;
- d3_geo_centroidZ1 += z;
- d3_geo_pathCentroidPoint(x0 = x, y0 = y);
- }
-}
+ while (++leftIndex < leftLength) {
+ args[leftIndex] = partials[leftIndex];
+ }
+ while (argsLength--) {
+ args[leftIndex++] = arguments[++argsIndex];
+ }
+ return apply(fn, isBind ? thisArg : this, args);
+ }
+ return wrapper;
+ }
-function d3_geo_pathCentroidLineEnd() {
- d3_geo_pathCentroid.point = d3_geo_pathCentroidPoint;
-}
+ /**
+ * Creates a `_.range` or `_.rangeRight` function.
+ *
+ * @private
+ * @param {boolean} [fromRight] Specify iterating from right to left.
+ * @returns {Function} Returns the new range function.
+ */
+ function createRange(fromRight) {
+ return function(start, end, step) {
+ if (step && typeof step != 'number' && isIterateeCall(start, end, step)) {
+ end = step = undefined;
+ }
+ // Ensure the sign of `-0` is preserved.
+ start = toFinite(start);
+ if (end === undefined) {
+ end = start;
+ start = 0;
+ } else {
+ end = toFinite(end);
+ }
+ step = step === undefined ? (start < end ? 1 : -1) : toFinite(step);
+ return baseRange(start, end, step, fromRight);
+ };
+ }
-function d3_geo_pathCentroidRingStart() {
- var x00, y00, x0, y0;
+ /**
+ * Creates a function that performs a relational operation on two values.
+ *
+ * @private
+ * @param {Function} operator The function to perform the operation.
+ * @returns {Function} Returns the new relational operation function.
+ */
+ function createRelationalOperation(operator) {
+ return function(value, other) {
+ if (!(typeof value == 'string' && typeof other == 'string')) {
+ value = toNumber(value);
+ other = toNumber(other);
+ }
+ return operator(value, other);
+ };
+ }
- // For the first point, â¦
- d3_geo_pathCentroid.point = function(x, y) {
- d3_geo_pathCentroid.point = nextPoint;
- d3_geo_pathCentroidPoint(x00 = x0 = x, y00 = y0 = y);
- };
+ /**
+ * Creates a function that wraps `func` to continue currying.
+ *
+ * @private
+ * @param {Function} func The function to wrap.
+ * @param {number} bitmask The bitmask flags. See `createWrap` for more details.
+ * @param {Function} wrapFunc The function to create the `func` wrapper.
+ * @param {*} placeholder The placeholder value.
+ * @param {*} [thisArg] The `this` binding of `func`.
+ * @param {Array} [partials] The arguments to prepend to those provided to
+ * the new function.
+ * @param {Array} [holders] The `partials` placeholder indexes.
+ * @param {Array} [argPos] The argument positions of the new function.
+ * @param {number} [ary] The arity cap of `func`.
+ * @param {number} [arity] The arity of `func`.
+ * @returns {Function} Returns the new wrapped function.
+ */
+ function createRecurry(func, bitmask, wrapFunc, placeholder, thisArg, partials, holders, argPos, ary, arity) {
+ var isCurry = bitmask & WRAP_CURRY_FLAG,
+ newHolders = isCurry ? holders : undefined,
+ newHoldersRight = isCurry ? undefined : holders,
+ newPartials = isCurry ? partials : undefined,
+ newPartialsRight = isCurry ? undefined : partials;
+
+ bitmask |= (isCurry ? WRAP_PARTIAL_FLAG : WRAP_PARTIAL_RIGHT_FLAG);
+ bitmask &= ~(isCurry ? WRAP_PARTIAL_RIGHT_FLAG : WRAP_PARTIAL_FLAG);
+
+ if (!(bitmask & WRAP_CURRY_BOUND_FLAG)) {
+ bitmask &= ~(WRAP_BIND_FLAG | WRAP_BIND_KEY_FLAG);
+ }
+ var newData = [
+ func, bitmask, thisArg, newPartials, newHolders, newPartialsRight,
+ newHoldersRight, argPos, ary, arity
+ ];
- // For subsequent points, â¦
- function nextPoint(x, y) {
- var dx = x - x0, dy = y - y0, z = Math.sqrt(dx * dx + dy * dy);
- d3_geo_centroidX1 += z * (x0 + x) / 2;
- d3_geo_centroidY1 += z * (y0 + y) / 2;
- d3_geo_centroidZ1 += z;
+ var result = wrapFunc.apply(undefined, newData);
+ if (isLaziable(func)) {
+ setData(result, newData);
+ }
+ result.placeholder = placeholder;
+ return setWrapToString(result, func, bitmask);
+ }
- z = y0 * x - x0 * y;
- d3_geo_centroidX2 += z * (x0 + x);
- d3_geo_centroidY2 += z * (y0 + y);
- d3_geo_centroidZ2 += z * 3;
- d3_geo_pathCentroidPoint(x0 = x, y0 = y);
- }
+ /**
+ * Creates a function like `_.round`.
+ *
+ * @private
+ * @param {string} methodName The name of the `Math` method to use when rounding.
+ * @returns {Function} Returns the new round function.
+ */
+ function createRound(methodName) {
+ var func = Math[methodName];
+ return function(number, precision) {
+ number = toNumber(number);
+ precision = precision == null ? 0 : nativeMin(toInteger(precision), 292);
+ if (precision) {
+ // Shift with exponential notation to avoid floating-point issues.
+ // See [MDN](https://mdn.io/round#Examples) for more details.
+ var pair = (toString(number) + 'e').split('e'),
+ value = func(pair[0] + 'e' + (+pair[1] + precision));
+
+ pair = (toString(value) + 'e').split('e');
+ return +(pair[0] + 'e' + (+pair[1] - precision));
+ }
+ return func(number);
+ };
+ }
- // For the last point, return to the start.
- d3_geo_pathCentroid.lineEnd = function() {
- nextPoint(x00, y00);
- };
-}
+ /**
+ * Creates a set object of `values`.
+ *
+ * @private
+ * @param {Array} values The values to add to the set.
+ * @returns {Object} Returns the new set.
+ */
+ var createSet = !(Set && (1 / setToArray(new Set([,-0]))[1]) == INFINITY) ? noop : function(values) {
+ return new Set(values);
+ };
-function d3_geo_pathContext(context) {
- var pointRadius = 4.5;
+ /**
+ * Creates a `_.toPairs` or `_.toPairsIn` function.
+ *
+ * @private
+ * @param {Function} keysFunc The function to get the keys of a given object.
+ * @returns {Function} Returns the new pairs function.
+ */
+ function createToPairs(keysFunc) {
+ return function(object) {
+ var tag = getTag(object);
+ if (tag == mapTag) {
+ return mapToArray(object);
+ }
+ if (tag == setTag) {
+ return setToPairs(object);
+ }
+ return baseToPairs(object, keysFunc(object));
+ };
+ }
- var stream = {
- point: point,
+ /**
+ * Creates a function that either curries or invokes `func` with optional
+ * `this` binding and partially applied arguments.
+ *
+ * @private
+ * @param {Function|string} func The function or method name to wrap.
+ * @param {number} bitmask The bitmask flags.
+ * 1 - `_.bind`
+ * 2 - `_.bindKey`
+ * 4 - `_.curry` or `_.curryRight` of a bound function
+ * 8 - `_.curry`
+ * 16 - `_.curryRight`
+ * 32 - `_.partial`
+ * 64 - `_.partialRight`
+ * 128 - `_.rearg`
+ * 256 - `_.ary`
+ * 512 - `_.flip`
+ * @param {*} [thisArg] The `this` binding of `func`.
+ * @param {Array} [partials] The arguments to be partially applied.
+ * @param {Array} [holders] The `partials` placeholder indexes.
+ * @param {Array} [argPos] The argument positions of the new function.
+ * @param {number} [ary] The arity cap of `func`.
+ * @param {number} [arity] The arity of `func`.
+ * @returns {Function} Returns the new wrapped function.
+ */
+ function createWrap(func, bitmask, thisArg, partials, holders, argPos, ary, arity) {
+ var isBindKey = bitmask & WRAP_BIND_KEY_FLAG;
+ if (!isBindKey && typeof func != 'function') {
+ throw new TypeError(FUNC_ERROR_TEXT);
+ }
+ var length = partials ? partials.length : 0;
+ if (!length) {
+ bitmask &= ~(WRAP_PARTIAL_FLAG | WRAP_PARTIAL_RIGHT_FLAG);
+ partials = holders = undefined;
+ }
+ ary = ary === undefined ? ary : nativeMax(toInteger(ary), 0);
+ arity = arity === undefined ? arity : toInteger(arity);
+ length -= holders ? holders.length : 0;
- // While inside a line, override point to moveTo then lineTo.
- lineStart: function() { stream.point = pointLineStart; },
- lineEnd: lineEnd,
+ if (bitmask & WRAP_PARTIAL_RIGHT_FLAG) {
+ var partialsRight = partials,
+ holdersRight = holders;
- // While inside a polygon, override lineEnd to closePath.
- polygonStart: function() { stream.lineEnd = lineEndPolygon; },
- polygonEnd: function() { stream.lineEnd = lineEnd; stream.point = point; },
+ partials = holders = undefined;
+ }
+ var data = isBindKey ? undefined : getData(func);
- pointRadius: function(_) {
- pointRadius = _;
- return stream;
- },
+ var newData = [
+ func, bitmask, thisArg, partials, holders, partialsRight, holdersRight,
+ argPos, ary, arity
+ ];
- result: d3_noop
- };
+ if (data) {
+ mergeData(newData, data);
+ }
+ func = newData[0];
+ bitmask = newData[1];
+ thisArg = newData[2];
+ partials = newData[3];
+ holders = newData[4];
+ arity = newData[9] = newData[9] === undefined
+ ? (isBindKey ? 0 : func.length)
+ : nativeMax(newData[9] - length, 0);
+
+ if (!arity && bitmask & (WRAP_CURRY_FLAG | WRAP_CURRY_RIGHT_FLAG)) {
+ bitmask &= ~(WRAP_CURRY_FLAG | WRAP_CURRY_RIGHT_FLAG);
+ }
+ if (!bitmask || bitmask == WRAP_BIND_FLAG) {
+ var result = createBind(func, bitmask, thisArg);
+ } else if (bitmask == WRAP_CURRY_FLAG || bitmask == WRAP_CURRY_RIGHT_FLAG) {
+ result = createCurry(func, bitmask, arity);
+ } else if ((bitmask == WRAP_PARTIAL_FLAG || bitmask == (WRAP_BIND_FLAG | WRAP_PARTIAL_FLAG)) && !holders.length) {
+ result = createPartial(func, bitmask, thisArg, partials);
+ } else {
+ result = createHybrid.apply(undefined, newData);
+ }
+ var setter = data ? baseSetData : setData;
+ return setWrapToString(setter(result, newData), func, bitmask);
+ }
- function point(x, y) {
- context.moveTo(x + pointRadius, y);
- context.arc(x, y, pointRadius, 0, Ï);
- }
+ /**
+ * Used by `_.defaults` to customize its `_.assignIn` use to assign properties
+ * of source objects to the destination object for all destination properties
+ * that resolve to `undefined`.
+ *
+ * @private
+ * @param {*} objValue The destination value.
+ * @param {*} srcValue The source value.
+ * @param {string} key The key of the property to assign.
+ * @param {Object} object The parent object of `objValue`.
+ * @returns {*} Returns the value to assign.
+ */
+ function customDefaultsAssignIn(objValue, srcValue, key, object) {
+ if (objValue === undefined ||
+ (eq(objValue, objectProto[key]) && !hasOwnProperty.call(object, key))) {
+ return srcValue;
+ }
+ return objValue;
+ }
- function pointLineStart(x, y) {
- context.moveTo(x, y);
- stream.point = pointLine;
- }
+ /**
+ * Used by `_.defaultsDeep` to customize its `_.merge` use to merge source
+ * objects into destination objects that are passed thru.
+ *
+ * @private
+ * @param {*} objValue The destination value.
+ * @param {*} srcValue The source value.
+ * @param {string} key The key of the property to merge.
+ * @param {Object} object The parent object of `objValue`.
+ * @param {Object} source The parent object of `srcValue`.
+ * @param {Object} [stack] Tracks traversed source values and their merged
+ * counterparts.
+ * @returns {*} Returns the value to assign.
+ */
+ function customDefaultsMerge(objValue, srcValue, key, object, source, stack) {
+ if (isObject(objValue) && isObject(srcValue)) {
+ // Recursively merge objects and arrays (susceptible to call stack limits).
+ stack.set(srcValue, objValue);
+ baseMerge(objValue, srcValue, undefined, customDefaultsMerge, stack);
+ stack['delete'](srcValue);
+ }
+ return objValue;
+ }
- function pointLine(x, y) {
- context.lineTo(x, y);
- }
+ /**
+ * Used by `_.omit` to customize its `_.cloneDeep` use to only clone plain
+ * objects.
+ *
+ * @private
+ * @param {*} value The value to inspect.
+ * @param {string} key The key of the property to inspect.
+ * @returns {*} Returns the uncloned value or `undefined` to defer cloning to `_.cloneDeep`.
+ */
+ function customOmitClone(value) {
+ return isPlainObject(value) ? undefined : value;
+ }
- function lineEnd() {
- stream.point = point;
- }
+ /**
+ * A specialized version of `baseIsEqualDeep` for arrays with support for
+ * partial deep comparisons.
+ *
+ * @private
+ * @param {Array} array The array to compare.
+ * @param {Array} other The other array to compare.
+ * @param {number} bitmask The bitmask flags. See `baseIsEqual` for more details.
+ * @param {Function} customizer The function to customize comparisons.
+ * @param {Function} equalFunc The function to determine equivalents of values.
+ * @param {Object} stack Tracks traversed `array` and `other` objects.
+ * @returns {boolean} Returns `true` if the arrays are equivalent, else `false`.
+ */
+ function equalArrays(array, other, bitmask, customizer, equalFunc, stack) {
+ var isPartial = bitmask & COMPARE_PARTIAL_FLAG,
+ arrLength = array.length,
+ othLength = other.length;
- function lineEndPolygon() {
- context.closePath();
- }
+ if (arrLength != othLength && !(isPartial && othLength > arrLength)) {
+ return false;
+ }
+ // Assume cyclic values are equal.
+ var stacked = stack.get(array);
+ if (stacked && stack.get(other)) {
+ return stacked == other;
+ }
+ var index = -1,
+ result = true,
+ seen = (bitmask & COMPARE_UNORDERED_FLAG) ? new SetCache : undefined;
- return stream;
-}
+ stack.set(array, other);
+ stack.set(other, array);
-function d3_geo_resample(project) {
- var δ2 = .5, // precision, px²
- cosMinDistance = Math.cos(30 * d3_radians), // cos(minimum angular distance)
- maxDepth = 16;
+ // Ignore non-index properties.
+ while (++index < arrLength) {
+ var arrValue = array[index],
+ othValue = other[index];
- function resample(stream) {
- return (maxDepth ? resampleRecursive : resampleNone)(stream);
- }
+ if (customizer) {
+ var compared = isPartial
+ ? customizer(othValue, arrValue, index, other, array, stack)
+ : customizer(arrValue, othValue, index, array, other, stack);
+ }
+ if (compared !== undefined) {
+ if (compared) {
+ continue;
+ }
+ result = false;
+ break;
+ }
+ // Recursively compare arrays (susceptible to call stack limits).
+ if (seen) {
+ if (!arraySome(other, function(othValue, othIndex) {
+ if (!cacheHas(seen, othIndex) &&
+ (arrValue === othValue || equalFunc(arrValue, othValue, bitmask, customizer, stack))) {
+ return seen.push(othIndex);
+ }
+ })) {
+ result = false;
+ break;
+ }
+ } else if (!(
+ arrValue === othValue ||
+ equalFunc(arrValue, othValue, bitmask, customizer, stack)
+ )) {
+ result = false;
+ break;
+ }
+ }
+ stack['delete'](array);
+ stack['delete'](other);
+ return result;
+ }
- function resampleNone(stream) {
- return d3_geo_transformPoint(stream, function(x, y) {
- x = project(x, y);
- stream.point(x[0], x[1]);
- });
- }
+ /**
+ * A specialized version of `baseIsEqualDeep` for comparing objects of
+ * the same `toStringTag`.
+ *
+ * **Note:** This function only supports comparing values with tags of
+ * `Boolean`, `Date`, `Error`, `Number`, `RegExp`, or `String`.
+ *
+ * @private
+ * @param {Object} object The object to compare.
+ * @param {Object} other The other object to compare.
+ * @param {string} tag The `toStringTag` of the objects to compare.
+ * @param {number} bitmask The bitmask flags. See `baseIsEqual` for more details.
+ * @param {Function} customizer The function to customize comparisons.
+ * @param {Function} equalFunc The function to determine equivalents of values.
+ * @param {Object} stack Tracks traversed `object` and `other` objects.
+ * @returns {boolean} Returns `true` if the objects are equivalent, else `false`.
+ */
+ function equalByTag(object, other, tag, bitmask, customizer, equalFunc, stack) {
+ switch (tag) {
+ case dataViewTag:
+ if ((object.byteLength != other.byteLength) ||
+ (object.byteOffset != other.byteOffset)) {
+ return false;
+ }
+ object = object.buffer;
+ other = other.buffer;
- function resampleRecursive(stream) {
- var λ00, Ï00, x00, y00, a00, b00, c00, // first point
- λ0, x0, y0, a0, b0, c0; // previous point
+ case arrayBufferTag:
+ if ((object.byteLength != other.byteLength) ||
+ !equalFunc(new Uint8Array(object), new Uint8Array(other))) {
+ return false;
+ }
+ return true;
- var resample = {
- point: point,
- lineStart: lineStart,
- lineEnd: lineEnd,
- polygonStart: function() { stream.polygonStart(); resample.lineStart = ringStart; },
- polygonEnd: function() { stream.polygonEnd(); resample.lineStart = lineStart; }
- };
+ case boolTag:
+ case dateTag:
+ case numberTag:
+ // Coerce booleans to `1` or `0` and dates to milliseconds.
+ // Invalid dates are coerced to `NaN`.
+ return eq(+object, +other);
- function point(x, y) {
- x = project(x, y);
- stream.point(x[0], x[1]);
- }
+ case errorTag:
+ return object.name == other.name && object.message == other.message;
- function lineStart() {
- x0 = NaN;
- resample.point = linePoint;
- stream.lineStart();
- }
+ case regexpTag:
+ case stringTag:
+ // Coerce regexes to strings and treat strings, primitives and objects,
+ // as equal. See http://www.ecma-international.org/ecma-262/7.0/#sec-regexp.prototype.tostring
+ // for more details.
+ return object == (other + '');
- function linePoint(λ, Ï) {
- var c = d3_geo_cartesian([λ, Ï]), p = project(λ, Ï);
- resampleLineTo(x0, y0, λ0, a0, b0, c0, x0 = p[0], y0 = p[1], λ0 = λ, a0 = c[0], b0 = c[1], c0 = c[2], maxDepth, stream);
- stream.point(x0, y0);
- }
+ case mapTag:
+ var convert = mapToArray;
- function lineEnd() {
- resample.point = point;
- stream.lineEnd();
- }
+ case setTag:
+ var isPartial = bitmask & COMPARE_PARTIAL_FLAG;
+ convert || (convert = setToArray);
- function ringStart() {
- lineStart();
- resample.point = ringPoint;
- resample.lineEnd = ringEnd;
- }
+ if (object.size != other.size && !isPartial) {
+ return false;
+ }
+ // Assume cyclic values are equal.
+ var stacked = stack.get(object);
+ if (stacked) {
+ return stacked == other;
+ }
+ bitmask |= COMPARE_UNORDERED_FLAG;
- function ringPoint(λ, Ï) {
- linePoint(λ00 = λ, Ï00 = Ï), x00 = x0, y00 = y0, a00 = a0, b00 = b0, c00 = c0;
- resample.point = linePoint;
- }
+ // Recursively compare objects (susceptible to call stack limits).
+ stack.set(object, other);
+ var result = equalArrays(convert(object), convert(other), bitmask, customizer, equalFunc, stack);
+ stack['delete'](object);
+ return result;
- function ringEnd() {
- resampleLineTo(x0, y0, λ0, a0, b0, c0, x00, y00, λ00, a00, b00, c00, maxDepth, stream);
- resample.lineEnd = lineEnd;
- lineEnd();
+ case symbolTag:
+ if (symbolValueOf) {
+ return symbolValueOf.call(object) == symbolValueOf.call(other);
+ }
+ }
+ return false;
}
- return resample;
- }
+ /**
+ * A specialized version of `baseIsEqualDeep` for objects with support for
+ * partial deep comparisons.
+ *
+ * @private
+ * @param {Object} object The object to compare.
+ * @param {Object} other The other object to compare.
+ * @param {number} bitmask The bitmask flags. See `baseIsEqual` for more details.
+ * @param {Function} customizer The function to customize comparisons.
+ * @param {Function} equalFunc The function to determine equivalents of values.
+ * @param {Object} stack Tracks traversed `object` and `other` objects.
+ * @returns {boolean} Returns `true` if the objects are equivalent, else `false`.
+ */
+ function equalObjects(object, other, bitmask, customizer, equalFunc, stack) {
+ var isPartial = bitmask & COMPARE_PARTIAL_FLAG,
+ objProps = getAllKeys(object),
+ objLength = objProps.length,
+ othProps = getAllKeys(other),
+ othLength = othProps.length;
+
+ if (objLength != othLength && !isPartial) {
+ return false;
+ }
+ var index = objLength;
+ while (index--) {
+ var key = objProps[index];
+ if (!(isPartial ? key in other : hasOwnProperty.call(other, key))) {
+ return false;
+ }
+ }
+ // Assume cyclic values are equal.
+ var stacked = stack.get(object);
+ if (stacked && stack.get(other)) {
+ return stacked == other;
+ }
+ var result = true;
+ stack.set(object, other);
+ stack.set(other, object);
+
+ var skipCtor = isPartial;
+ while (++index < objLength) {
+ key = objProps[index];
+ var objValue = object[key],
+ othValue = other[key];
+
+ if (customizer) {
+ var compared = isPartial
+ ? customizer(othValue, objValue, key, other, object, stack)
+ : customizer(objValue, othValue, key, object, other, stack);
+ }
+ // Recursively compare objects (susceptible to call stack limits).
+ if (!(compared === undefined
+ ? (objValue === othValue || equalFunc(objValue, othValue, bitmask, customizer, stack))
+ : compared
+ )) {
+ result = false;
+ break;
+ }
+ skipCtor || (skipCtor = key == 'constructor');
+ }
+ if (result && !skipCtor) {
+ var objCtor = object.constructor,
+ othCtor = other.constructor;
- function resampleLineTo(x0, y0, λ0, a0, b0, c0, x1, y1, λ1, a1, b1, c1, depth, stream) {
- var dx = x1 - x0,
- dy = y1 - y0,
- d2 = dx * dx + dy * dy;
- if (d2 > 4 * δ2 && depth--) {
- var a = a0 + a1,
- b = b0 + b1,
- c = c0 + c1,
- m = Math.sqrt(a * a + b * b + c * c),
- Ï2 = Math.asin(c /= m),
- λ2 = abs(abs(c) - 1) < ε || abs(λ0 - λ1) < ε ? (λ0 + λ1) / 2 : Math.atan2(b, a),
- p = project(λ2, Ï2),
- x2 = p[0],
- y2 = p[1],
- dx2 = x2 - x0,
- dy2 = y2 - y0,
- dz = dy * dx2 - dx * dy2;
- if (dz * dz / d2 > δ2 // perpendicular projected distance
- || abs((dx * dx2 + dy * dy2) / d2 - .5) > .3 // midpoint close to an end
- || a0 * a1 + b0 * b1 + c0 * c1 < cosMinDistance) { // angular distance
- resampleLineTo(x0, y0, λ0, a0, b0, c0, x2, y2, λ2, a /= m, b /= m, c, depth, stream);
- stream.point(x2, y2);
- resampleLineTo(x2, y2, λ2, a, b, c, x1, y1, λ1, a1, b1, c1, depth, stream);
+ // Non `Object` object instances with different constructors are not equal.
+ if (objCtor != othCtor &&
+ ('constructor' in object && 'constructor' in other) &&
+ !(typeof objCtor == 'function' && objCtor instanceof objCtor &&
+ typeof othCtor == 'function' && othCtor instanceof othCtor)) {
+ result = false;
+ }
}
+ stack['delete'](object);
+ stack['delete'](other);
+ return result;
}
- }
-
- resample.precision = function(_) {
- if (!arguments.length) return Math.sqrt(δ2);
- maxDepth = (δ2 = _ * _) > 0 && 16;
- return resample;
- };
- return resample;
-}
+ /**
+ * A specialized version of `baseRest` which flattens the rest array.
+ *
+ * @private
+ * @param {Function} func The function to apply a rest parameter to.
+ * @returns {Function} Returns the new function.
+ */
+ function flatRest(func) {
+ return setToString(overRest(func, undefined, flatten), func + '');
+ }
-d3.geo.path = function() {
- var pointRadius = 4.5,
- projection,
- context,
- projectStream,
- contextStream,
- cacheStream;
+ /**
+ * Creates an array of own enumerable property names and symbols of `object`.
+ *
+ * @private
+ * @param {Object} object The object to query.
+ * @returns {Array} Returns the array of property names and symbols.
+ */
+ function getAllKeys(object) {
+ return baseGetAllKeys(object, keys, getSymbols);
+ }
- function path(object) {
- if (object) {
- if (typeof pointRadius === "function") contextStream.pointRadius(+pointRadius.apply(this, arguments));
- if (!cacheStream || !cacheStream.valid) cacheStream = projectStream(contextStream);
- d3.geo.stream(object, cacheStream);
+ /**
+ * Creates an array of own and inherited enumerable property names and
+ * symbols of `object`.
+ *
+ * @private
+ * @param {Object} object The object to query.
+ * @returns {Array} Returns the array of property names and symbols.
+ */
+ function getAllKeysIn(object) {
+ return baseGetAllKeys(object, keysIn, getSymbolsIn);
}
- return contextStream.result();
- }
- path.area = function(object) {
- d3_geo_pathAreaSum = 0;
- d3.geo.stream(object, projectStream(d3_geo_pathArea));
- return d3_geo_pathAreaSum;
- };
+ /**
+ * Gets metadata for `func`.
+ *
+ * @private
+ * @param {Function} func The function to query.
+ * @returns {*} Returns the metadata for `func`.
+ */
+ var getData = !metaMap ? noop : function(func) {
+ return metaMap.get(func);
+ };
- path.centroid = function(object) {
- d3_geo_centroidX0 = d3_geo_centroidY0 = d3_geo_centroidZ0 =
- d3_geo_centroidX1 = d3_geo_centroidY1 = d3_geo_centroidZ1 =
- d3_geo_centroidX2 = d3_geo_centroidY2 = d3_geo_centroidZ2 = 0;
- d3.geo.stream(object, projectStream(d3_geo_pathCentroid));
- return d3_geo_centroidZ2 ? [d3_geo_centroidX2 / d3_geo_centroidZ2, d3_geo_centroidY2 / d3_geo_centroidZ2]
- : d3_geo_centroidZ1 ? [d3_geo_centroidX1 / d3_geo_centroidZ1, d3_geo_centroidY1 / d3_geo_centroidZ1]
- : d3_geo_centroidZ0 ? [d3_geo_centroidX0 / d3_geo_centroidZ0, d3_geo_centroidY0 / d3_geo_centroidZ0]
- : [NaN, NaN];
- };
+ /**
+ * Gets the name of `func`.
+ *
+ * @private
+ * @param {Function} func The function to query.
+ * @returns {string} Returns the function name.
+ */
+ function getFuncName(func) {
+ var result = (func.name + ''),
+ array = realNames[result],
+ length = hasOwnProperty.call(realNames, result) ? array.length : 0;
- path.bounds = function(object) {
- d3_geo_pathBoundsX1 = d3_geo_pathBoundsY1 = -(d3_geo_pathBoundsX0 = d3_geo_pathBoundsY0 = Infinity);
- d3.geo.stream(object, projectStream(d3_geo_pathBounds));
- return [[d3_geo_pathBoundsX0, d3_geo_pathBoundsY0], [d3_geo_pathBoundsX1, d3_geo_pathBoundsY1]];
- };
+ while (length--) {
+ var data = array[length],
+ otherFunc = data.func;
+ if (otherFunc == null || otherFunc == func) {
+ return data.name;
+ }
+ }
+ return result;
+ }
- path.projection = function(_) {
- if (!arguments.length) return projection;
- projectStream = (projection = _) ? _.stream || d3_geo_pathProjectStream(_) : d3_identity;
- return reset();
- };
-
- path.context = function(_) {
- if (!arguments.length) return context;
- contextStream = (context = _) == null ? new d3_geo_pathBuffer : new d3_geo_pathContext(_);
- if (typeof pointRadius !== "function") contextStream.pointRadius(pointRadius);
- return reset();
- };
+ /**
+ * Gets the argument placeholder value for `func`.
+ *
+ * @private
+ * @param {Function} func The function to inspect.
+ * @returns {*} Returns the placeholder value.
+ */
+ function getHolder(func) {
+ var object = hasOwnProperty.call(lodash, 'placeholder') ? lodash : func;
+ return object.placeholder;
+ }
- path.pointRadius = function(_) {
- if (!arguments.length) return pointRadius;
- pointRadius = typeof _ === "function" ? _ : (contextStream.pointRadius(+_), +_);
- return path;
- };
+ /**
+ * Gets the appropriate "iteratee" function. If `_.iteratee` is customized,
+ * this function returns the custom method, otherwise it returns `baseIteratee`.
+ * If arguments are provided, the chosen function is invoked with them and
+ * its result is returned.
+ *
+ * @private
+ * @param {*} [value] The value to convert to an iteratee.
+ * @param {number} [arity] The arity of the created iteratee.
+ * @returns {Function} Returns the chosen function or its result.
+ */
+ function getIteratee() {
+ var result = lodash.iteratee || iteratee;
+ result = result === iteratee ? baseIteratee : result;
+ return arguments.length ? result(arguments[0], arguments[1]) : result;
+ }
- function reset() {
- cacheStream = null;
- return path;
- }
+ /**
+ * Gets the data for `map`.
+ *
+ * @private
+ * @param {Object} map The map to query.
+ * @param {string} key The reference key.
+ * @returns {*} Returns the map data.
+ */
+ function getMapData(map, key) {
+ var data = map.__data__;
+ return isKeyable(key)
+ ? data[typeof key == 'string' ? 'string' : 'hash']
+ : data.map;
+ }
- return path.projection(d3.geo.albersUsa()).context(null);
-};
+ /**
+ * Gets the property names, values, and compare flags of `object`.
+ *
+ * @private
+ * @param {Object} object The object to query.
+ * @returns {Array} Returns the match data of `object`.
+ */
+ function getMatchData(object) {
+ var result = keys(object),
+ length = result.length;
-function d3_geo_pathProjectStream(project) {
- var resample = d3_geo_resample(function(x, y) { return project([x * d3_degrees, y * d3_degrees]); });
- return function(stream) { return d3_geo_projectionRadians(resample(stream)); };
-}
+ while (length--) {
+ var key = result[length],
+ value = object[key];
-d3.geo.transform = function(methods) {
- return {
- stream: function(stream) {
- var transform = new d3_geo_transform(stream);
- for (var k in methods) transform[k] = methods[k];
- return transform;
+ result[length] = [key, value, isStrictComparable(value)];
+ }
+ return result;
}
- };
-};
-
-function d3_geo_transform(stream) {
- this.stream = stream;
-}
-
-d3_geo_transform.prototype = {
- point: function(x, y) { this.stream.point(x, y); },
- sphere: function() { this.stream.sphere(); },
- lineStart: function() { this.stream.lineStart(); },
- lineEnd: function() { this.stream.lineEnd(); },
- polygonStart: function() { this.stream.polygonStart(); },
- polygonEnd: function() { this.stream.polygonEnd(); }
-};
-function d3_geo_transformPoint(stream, point) {
- return {
- point: point,
- sphere: function() { stream.sphere(); },
- lineStart: function() { stream.lineStart(); },
- lineEnd: function() { stream.lineEnd(); },
- polygonStart: function() { stream.polygonStart(); },
- polygonEnd: function() { stream.polygonEnd(); },
- };
-}
+ /**
+ * Gets the native function at `key` of `object`.
+ *
+ * @private
+ * @param {Object} object The object to query.
+ * @param {string} key The key of the method to get.
+ * @returns {*} Returns the function if it's native, else `undefined`.
+ */
+ function getNative(object, key) {
+ var value = getValue(object, key);
+ return baseIsNative(value) ? value : undefined;
+ }
-d3.geo.projection = d3_geo_projection;
-d3.geo.projectionMutator = d3_geo_projectionMutator;
+ /**
+ * A specialized version of `baseGetTag` which ignores `Symbol.toStringTag` values.
+ *
+ * @private
+ * @param {*} value The value to query.
+ * @returns {string} Returns the raw `toStringTag`.
+ */
+ function getRawTag(value) {
+ var isOwn = hasOwnProperty.call(value, symToStringTag),
+ tag = value[symToStringTag];
-function d3_geo_projection(project) {
- return d3_geo_projectionMutator(function() { return project; })();
-}
+ try {
+ value[symToStringTag] = undefined;
+ var unmasked = true;
+ } catch (e) {}
+
+ var result = nativeObjectToString.call(value);
+ if (unmasked) {
+ if (isOwn) {
+ value[symToStringTag] = tag;
+ } else {
+ delete value[symToStringTag];
+ }
+ }
+ return result;
+ }
-function d3_geo_projectionMutator(projectAt) {
- var project,
- rotate,
- projectRotate,
- projectResample = d3_geo_resample(function(x, y) { x = project(x, y); return [x[0] * k + δx, δy - x[1] * k]; }),
- k = 150, // scale
- x = 480, y = 250, // translate
- λ = 0, Ï = 0, // center
- δλ = 0, Î´Ï = 0, δγ = 0, // rotate
- δx, δy, // center
- preclip = d3_geo_clipAntimeridian,
- postclip = d3_identity,
- clipAngle = null,
- clipExtent = null,
- stream;
+ /**
+ * Creates an array of the own enumerable symbols of `object`.
+ *
+ * @private
+ * @param {Object} object The object to query.
+ * @returns {Array} Returns the array of symbols.
+ */
+ var getSymbols = !nativeGetSymbols ? stubArray : function(object) {
+ if (object == null) {
+ return [];
+ }
+ object = Object(object);
+ return arrayFilter(nativeGetSymbols(object), function(symbol) {
+ return propertyIsEnumerable.call(object, symbol);
+ });
+ };
- function projection(point) {
- point = projectRotate(point[0] * d3_radians, point[1] * d3_radians);
- return [point[0] * k + δx, δy - point[1] * k];
- }
+ /**
+ * Creates an array of the own and inherited enumerable symbols of `object`.
+ *
+ * @private
+ * @param {Object} object The object to query.
+ * @returns {Array} Returns the array of symbols.
+ */
+ var getSymbolsIn = !nativeGetSymbols ? stubArray : function(object) {
+ var result = [];
+ while (object) {
+ arrayPush(result, getSymbols(object));
+ object = getPrototype(object);
+ }
+ return result;
+ };
- function invert(point) {
- point = projectRotate.invert((point[0] - δx) / k, (δy - point[1]) / k);
- return point && [point[0] * d3_degrees, point[1] * d3_degrees];
- }
+ /**
+ * Gets the `toStringTag` of `value`.
+ *
+ * @private
+ * @param {*} value The value to query.
+ * @returns {string} Returns the `toStringTag`.
+ */
+ var getTag = baseGetTag;
+
+ // Fallback for data views, maps, sets, and weak maps in IE 11 and promises in Node.js < 6.
+ if ((DataView && getTag(new DataView(new ArrayBuffer(1))) != dataViewTag) ||
+ (Map && getTag(new Map) != mapTag) ||
+ (Promise && getTag(Promise.resolve()) != promiseTag) ||
+ (Set && getTag(new Set) != setTag) ||
+ (WeakMap && getTag(new WeakMap) != weakMapTag)) {
+ getTag = function(value) {
+ var result = baseGetTag(value),
+ Ctor = result == objectTag ? value.constructor : undefined,
+ ctorString = Ctor ? toSource(Ctor) : '';
+
+ if (ctorString) {
+ switch (ctorString) {
+ case dataViewCtorString: return dataViewTag;
+ case mapCtorString: return mapTag;
+ case promiseCtorString: return promiseTag;
+ case setCtorString: return setTag;
+ case weakMapCtorString: return weakMapTag;
+ }
+ }
+ return result;
+ };
+ }
- projection.stream = function(output) {
- if (stream) stream.valid = false;
- stream = d3_geo_projectionRadians(preclip(rotate, projectResample(postclip(output))));
- stream.valid = true; // allow caching by d3.geo.path
- return stream;
- };
+ /**
+ * Gets the view, applying any `transforms` to the `start` and `end` positions.
+ *
+ * @private
+ * @param {number} start The start of the view.
+ * @param {number} end The end of the view.
+ * @param {Array} transforms The transformations to apply to the view.
+ * @returns {Object} Returns an object containing the `start` and `end`
+ * positions of the view.
+ */
+ function getView(start, end, transforms) {
+ var index = -1,
+ length = transforms.length;
- projection.clipAngle = function(_) {
- if (!arguments.length) return clipAngle;
- preclip = _ == null ? (clipAngle = _, d3_geo_clipAntimeridian) : d3_geo_clipCircle((clipAngle = +_) * d3_radians);
- return invalidate();
- };
+ while (++index < length) {
+ var data = transforms[index],
+ size = data.size;
- projection.clipExtent = function(_) {
- if (!arguments.length) return clipExtent;
- clipExtent = _;
- postclip = _ ? d3_geo_clipExtent(_[0][0], _[0][1], _[1][0], _[1][1]) : d3_identity;
- return invalidate();
- };
+ switch (data.type) {
+ case 'drop': start += size; break;
+ case 'dropRight': end -= size; break;
+ case 'take': end = nativeMin(end, start + size); break;
+ case 'takeRight': start = nativeMax(start, end - size); break;
+ }
+ }
+ return { 'start': start, 'end': end };
+ }
- projection.scale = function(_) {
- if (!arguments.length) return k;
- k = +_;
- return reset();
- };
+ /**
+ * Extracts wrapper details from the `source` body comment.
+ *
+ * @private
+ * @param {string} source The source to inspect.
+ * @returns {Array} Returns the wrapper details.
+ */
+ function getWrapDetails(source) {
+ var match = source.match(reWrapDetails);
+ return match ? match[1].split(reSplitDetails) : [];
+ }
- projection.translate = function(_) {
- if (!arguments.length) return [x, y];
- x = +_[0];
- y = +_[1];
- return reset();
- };
+ /**
+ * Checks if `path` exists on `object`.
+ *
+ * @private
+ * @param {Object} object The object to query.
+ * @param {Array|string} path The path to check.
+ * @param {Function} hasFunc The function to check properties.
+ * @returns {boolean} Returns `true` if `path` exists, else `false`.
+ */
+ function hasPath(object, path, hasFunc) {
+ path = castPath(path, object);
- projection.center = function(_) {
- if (!arguments.length) return [λ * d3_degrees, Ï * d3_degrees];
- λ = _[0] % 360 * d3_radians;
- Ï = _[1] % 360 * d3_radians;
- return reset();
- };
+ var index = -1,
+ length = path.length,
+ result = false;
- projection.rotate = function(_) {
- if (!arguments.length) return [δλ * d3_degrees, Î´Ï * d3_degrees, δγ * d3_degrees];
- δλ = _[0] % 360 * d3_radians;
- Î´Ï = _[1] % 360 * d3_radians;
- δγ = _.length > 2 ? _[2] % 360 * d3_radians : 0;
- return reset();
- };
+ while (++index < length) {
+ var key = toKey(path[index]);
+ if (!(result = object != null && hasFunc(object, key))) {
+ break;
+ }
+ object = object[key];
+ }
+ if (result || ++index != length) {
+ return result;
+ }
+ length = object == null ? 0 : object.length;
+ return !!length && isLength(length) && isIndex(key, length) &&
+ (isArray(object) || isArguments(object));
+ }
- d3.rebind(projection, projectResample, "precision");
+ /**
+ * Initializes an array clone.
+ *
+ * @private
+ * @param {Array} array The array to clone.
+ * @returns {Array} Returns the initialized clone.
+ */
+ function initCloneArray(array) {
+ var length = array.length,
+ result = array.constructor(length);
+
+ // Add properties assigned by `RegExp#exec`.
+ if (length && typeof array[0] == 'string' && hasOwnProperty.call(array, 'index')) {
+ result.index = array.index;
+ result.input = array.input;
+ }
+ return result;
+ }
- function reset() {
- projectRotate = d3_geo_compose(rotate = d3_geo_rotation(δλ, δÏ, δγ), project);
- var center = project(λ, Ï);
- δx = x - center[0] * k;
- δy = y + center[1] * k;
- return invalidate();
- }
+ /**
+ * Initializes an object clone.
+ *
+ * @private
+ * @param {Object} object The object to clone.
+ * @returns {Object} Returns the initialized clone.
+ */
+ function initCloneObject(object) {
+ return (typeof object.constructor == 'function' && !isPrototype(object))
+ ? baseCreate(getPrototype(object))
+ : {};
+ }
- function invalidate() {
- if (stream) stream.valid = false, stream = null;
- return projection;
- }
+ /**
+ * Initializes an object clone based on its `toStringTag`.
+ *
+ * **Note:** This function only supports cloning values with tags of
+ * `Boolean`, `Date`, `Error`, `Number`, `RegExp`, or `String`.
+ *
+ * @private
+ * @param {Object} object The object to clone.
+ * @param {string} tag The `toStringTag` of the object to clone.
+ * @param {Function} cloneFunc The function to clone values.
+ * @param {boolean} [isDeep] Specify a deep clone.
+ * @returns {Object} Returns the initialized clone.
+ */
+ function initCloneByTag(object, tag, cloneFunc, isDeep) {
+ var Ctor = object.constructor;
+ switch (tag) {
+ case arrayBufferTag:
+ return cloneArrayBuffer(object);
- return function() {
- project = projectAt.apply(this, arguments);
- projection.invert = project.invert && invert;
- return reset();
- };
-}
+ case boolTag:
+ case dateTag:
+ return new Ctor(+object);
-function d3_geo_projectionRadians(stream) {
- return d3_geo_transformPoint(stream, function(x, y) {
- stream.point(x * d3_radians, y * d3_radians);
- });
-}
+ case dataViewTag:
+ return cloneDataView(object, isDeep);
-function d3_geo_mercator(λ, Ï) {
- return [λ, Math.log(Math.tan(Ï / 4 + Ï / 2))];
-}
+ case float32Tag: case float64Tag:
+ case int8Tag: case int16Tag: case int32Tag:
+ case uint8Tag: case uint8ClampedTag: case uint16Tag: case uint32Tag:
+ return cloneTypedArray(object, isDeep);
-d3_geo_mercator.invert = function(x, y) {
- return [x, 2 * Math.atan(Math.exp(y)) - halfÏ];
-};
+ case mapTag:
+ return cloneMap(object, isDeep, cloneFunc);
-function d3_geo_mercatorProjection(project) {
- var m = d3_geo_projection(project),
- scale = m.scale,
- translate = m.translate,
- clipExtent = m.clipExtent,
- clipAuto;
+ case numberTag:
+ case stringTag:
+ return new Ctor(object);
- m.scale = function() {
- var v = scale.apply(m, arguments);
- return v === m ? (clipAuto ? m.clipExtent(null) : m) : v;
- };
+ case regexpTag:
+ return cloneRegExp(object);
- m.translate = function() {
- var v = translate.apply(m, arguments);
- return v === m ? (clipAuto ? m.clipExtent(null) : m) : v;
- };
+ case setTag:
+ return cloneSet(object, isDeep, cloneFunc);
- m.clipExtent = function(_) {
- var v = clipExtent.apply(m, arguments);
- if (v === m) {
- if (clipAuto = _ == null) {
- var k = Ï * scale(), t = translate();
- clipExtent([[t[0] - k, t[1] - k], [t[0] + k, t[1] + k]]);
+ case symbolTag:
+ return cloneSymbol(object);
}
- } else if (clipAuto) {
- v = null;
}
- return v;
- };
- return m.clipExtent(null);
-}
+ /**
+ * Inserts wrapper `details` in a comment at the top of the `source` body.
+ *
+ * @private
+ * @param {string} source The source to modify.
+ * @returns {Array} details The details to insert.
+ * @returns {string} Returns the modified source.
+ */
+ function insertWrapDetails(source, details) {
+ var length = details.length;
+ if (!length) {
+ return source;
+ }
+ var lastIndex = length - 1;
+ details[lastIndex] = (length > 1 ? '& ' : '') + details[lastIndex];
+ details = details.join(length > 2 ? ', ' : ' ');
+ return source.replace(reWrapComment, '{\n/* [wrapped with ' + details + '] */\n');
+ }
-(d3.geo.mercator = function() {
- return d3_geo_mercatorProjection(d3_geo_mercator);
-}).raw = d3_geo_mercator;
-d3.geom = {};
+ /**
+ * Checks if `value` is a flattenable `arguments` object or array.
+ *
+ * @private
+ * @param {*} value The value to check.
+ * @returns {boolean} Returns `true` if `value` is flattenable, else `false`.
+ */
+ function isFlattenable(value) {
+ return isArray(value) || isArguments(value) ||
+ !!(spreadableSymbol && value && value[spreadableSymbol]);
+ }
-d3.geom.polygon = function(coordinates) {
- d3_subclass(coordinates, d3_geom_polygonPrototype);
- return coordinates;
-};
+ /**
+ * Checks if `value` is a valid array-like index.
+ *
+ * @private
+ * @param {*} value The value to check.
+ * @param {number} [length=MAX_SAFE_INTEGER] The upper bounds of a valid index.
+ * @returns {boolean} Returns `true` if `value` is a valid index, else `false`.
+ */
+ function isIndex(value, length) {
+ length = length == null ? MAX_SAFE_INTEGER : length;
+ return !!length &&
+ (typeof value == 'number' || reIsUint.test(value)) &&
+ (value > -1 && value % 1 == 0 && value < length);
+ }
-var d3_geom_polygonPrototype = d3.geom.polygon.prototype = [];
+ /**
+ * Checks if the given arguments are from an iteratee call.
+ *
+ * @private
+ * @param {*} value The potential iteratee value argument.
+ * @param {*} index The potential iteratee index or key argument.
+ * @param {*} object The potential iteratee object argument.
+ * @returns {boolean} Returns `true` if the arguments are from an iteratee call,
+ * else `false`.
+ */
+ function isIterateeCall(value, index, object) {
+ if (!isObject(object)) {
+ return false;
+ }
+ var type = typeof index;
+ if (type == 'number'
+ ? (isArrayLike(object) && isIndex(index, object.length))
+ : (type == 'string' && index in object)
+ ) {
+ return eq(object[index], value);
+ }
+ return false;
+ }
-d3_geom_polygonPrototype.area = function() {
- var i = -1,
- n = this.length,
- a,
- b = this[n - 1],
- area = 0;
+ /**
+ * Checks if `value` is a property name and not a property path.
+ *
+ * @private
+ * @param {*} value The value to check.
+ * @param {Object} [object] The object to query keys on.
+ * @returns {boolean} Returns `true` if `value` is a property name, else `false`.
+ */
+ function isKey(value, object) {
+ if (isArray(value)) {
+ return false;
+ }
+ var type = typeof value;
+ if (type == 'number' || type == 'symbol' || type == 'boolean' ||
+ value == null || isSymbol(value)) {
+ return true;
+ }
+ return reIsPlainProp.test(value) || !reIsDeepProp.test(value) ||
+ (object != null && value in Object(object));
+ }
- while (++i < n) {
- a = b;
- b = this[i];
- area += a[1] * b[0] - a[0] * b[1];
- }
+ /**
+ * Checks if `value` is suitable for use as unique object key.
+ *
+ * @private
+ * @param {*} value The value to check.
+ * @returns {boolean} Returns `true` if `value` is suitable, else `false`.
+ */
+ function isKeyable(value) {
+ var type = typeof value;
+ return (type == 'string' || type == 'number' || type == 'symbol' || type == 'boolean')
+ ? (value !== '__proto__')
+ : (value === null);
+ }
- return area * .5;
-};
+ /**
+ * Checks if `func` has a lazy counterpart.
+ *
+ * @private
+ * @param {Function} func The function to check.
+ * @returns {boolean} Returns `true` if `func` has a lazy counterpart,
+ * else `false`.
+ */
+ function isLaziable(func) {
+ var funcName = getFuncName(func),
+ other = lodash[funcName];
-d3_geom_polygonPrototype.centroid = function(k) {
- var i = -1,
- n = this.length,
- x = 0,
- y = 0,
- a,
- b = this[n - 1],
- c;
+ if (typeof other != 'function' || !(funcName in LazyWrapper.prototype)) {
+ return false;
+ }
+ if (func === other) {
+ return true;
+ }
+ var data = getData(other);
+ return !!data && func === data[0];
+ }
- if (!arguments.length) k = -1 / (6 * this.area());
+ /**
+ * Checks if `func` has its source masked.
+ *
+ * @private
+ * @param {Function} func The function to check.
+ * @returns {boolean} Returns `true` if `func` is masked, else `false`.
+ */
+ function isMasked(func) {
+ return !!maskSrcKey && (maskSrcKey in func);
+ }
- while (++i < n) {
- a = b;
- b = this[i];
- c = a[0] * b[1] - b[0] * a[1];
- x += (a[0] + b[0]) * c;
- y += (a[1] + b[1]) * c;
- }
+ /**
+ * Checks if `func` is capable of being masked.
+ *
+ * @private
+ * @param {*} value The value to check.
+ * @returns {boolean} Returns `true` if `func` is maskable, else `false`.
+ */
+ var isMaskable = coreJsData ? isFunction : stubFalse;
- return [x * k, y * k];
-};
+ /**
+ * Checks if `value` is likely a prototype object.
+ *
+ * @private
+ * @param {*} value The value to check.
+ * @returns {boolean} Returns `true` if `value` is a prototype, else `false`.
+ */
+ function isPrototype(value) {
+ var Ctor = value && value.constructor,
+ proto = (typeof Ctor == 'function' && Ctor.prototype) || objectProto;
-// The Sutherland-Hodgman clipping algorithm.
-// Note: requires the clip polygon to be counterclockwise and convex.
-d3_geom_polygonPrototype.clip = function(subject) {
- var input,
- closed = d3_geom_polygonClosed(subject),
- i = -1,
- n = this.length - d3_geom_polygonClosed(this),
- j,
- m,
- a = this[n - 1],
- b,
- c,
- d;
+ return value === proto;
+ }
- while (++i < n) {
- input = subject.slice();
- subject.length = 0;
- b = this[i];
- c = input[(m = input.length - closed) - 1];
- j = -1;
- while (++j < m) {
- d = input[j];
- if (d3_geom_polygonInside(d, a, b)) {
- if (!d3_geom_polygonInside(c, a, b)) {
- subject.push(d3_geom_polygonIntersect(c, d, a, b));
- }
- subject.push(d);
- } else if (d3_geom_polygonInside(c, a, b)) {
- subject.push(d3_geom_polygonIntersect(c, d, a, b));
- }
- c = d;
- }
- if (closed) subject.push(subject[0]);
- a = b;
- }
-
- return subject;
-};
-
-function d3_geom_polygonInside(p, a, b) {
- return (b[0] - a[0]) * (p[1] - a[1]) < (b[1] - a[1]) * (p[0] - a[0]);
-}
-
-// Intersect two infinite lines cd and ab.
-function d3_geom_polygonIntersect(c, d, a, b) {
- var x1 = c[0], x3 = a[0], x21 = d[0] - x1, x43 = b[0] - x3,
- y1 = c[1], y3 = a[1], y21 = d[1] - y1, y43 = b[1] - y3,
- ua = (x43 * (y1 - y3) - y43 * (x1 - x3)) / (y43 * x21 - x43 * y21);
- return [x1 + ua * x21, y1 + ua * y21];
-}
-
-// Returns true if the polygon is closed.
-function d3_geom_polygonClosed(coordinates) {
- var a = coordinates[0],
- b = coordinates[coordinates.length - 1];
- return !(a[0] - b[0] || a[1] - b[1]);
-}
-function d3_geom_pointX(d) {
- return d[0];
-}
-
-function d3_geom_pointY(d) {
- return d[1];
-}
-
-/**
- * Computes the 2D convex hull of a set of points using the monotone chain
- * algorithm:
- * http://en.wikibooks.org/wiki/Algorithm_Implementation/Geometry/Convex_hull/Monotone_chain)
- *
- * The runtime of this algorithm is O(n log n), where n is the number of input
- * points. However in practice it outperforms other O(n log n) hulls.
- *
- * @param vertices [[x1, y1], [x2, y2], ...]
- * @returns polygon [[x1, y1], [x2, y2], ...]
- */
-d3.geom.hull = function(vertices) {
- var x = d3_geom_pointX,
- y = d3_geom_pointY;
-
- if (arguments.length) return hull(vertices);
-
- function hull(data) {
- // Hull of < 3 points is not well-defined
- if (data.length < 3) return [];
-
- var fx = d3_functor(x),
- fy = d3_functor(y),
- i,
- n = data.length,
- points = [], // of the form [[x0, y0, 0], ..., [xn, yn, n]]
- flippedPoints = [];
-
- for (i = 0 ; i < n; i++) {
- points.push([+fx.call(this, data[i], i), +fy.call(this, data[i], i), i]);
+ /**
+ * Checks if `value` is suitable for strict equality comparisons, i.e. `===`.
+ *
+ * @private
+ * @param {*} value The value to check.
+ * @returns {boolean} Returns `true` if `value` if suitable for strict
+ * equality comparisons, else `false`.
+ */
+ function isStrictComparable(value) {
+ return value === value && !isObject(value);
}
- // sort ascending by x-coord first, y-coord second
- points.sort(d3_geom_hullOrder);
-
- // we flip bottommost points across y axis so we can use the upper hull routine on both
- for (i = 0; i < n; i++) flippedPoints.push([points[i][0], -points[i][1]]);
-
- var upper = d3_geom_hullUpper(points),
- lower = d3_geom_hullUpper(flippedPoints);
-
- // construct the polygon, removing possible duplicate endpoints
- var skipLeft = lower[0] === upper[0],
- skipRight = lower[lower.length - 1] === upper[upper.length - 1],
- polygon = [];
+ /**
+ * A specialized version of `matchesProperty` for source values suitable
+ * for strict equality comparisons, i.e. `===`.
+ *
+ * @private
+ * @param {string} key The key of the property to get.
+ * @param {*} srcValue The value to match.
+ * @returns {Function} Returns the new spec function.
+ */
+ function matchesStrictComparable(key, srcValue) {
+ return function(object) {
+ if (object == null) {
+ return false;
+ }
+ return object[key] === srcValue &&
+ (srcValue !== undefined || (key in Object(object)));
+ };
+ }
- // add upper hull in r->l order
- // then add lower hull in l->r order
- for (i = upper.length - 1; i >= 0; --i) polygon.push(data[points[upper[i]][2]]);
- for (i = +skipLeft; i < lower.length - skipRight; ++i) polygon.push(data[points[lower[i]][2]]);
+ /**
+ * A specialized version of `_.memoize` which clears the memoized function's
+ * cache when it exceeds `MAX_MEMOIZE_SIZE`.
+ *
+ * @private
+ * @param {Function} func The function to have its output memoized.
+ * @returns {Function} Returns the new memoized function.
+ */
+ function memoizeCapped(func) {
+ var result = memoize(func, function(key) {
+ if (cache.size === MAX_MEMOIZE_SIZE) {
+ cache.clear();
+ }
+ return key;
+ });
- return polygon;
- }
+ var cache = result.cache;
+ return result;
+ }
- hull.x = function(_) {
- return arguments.length ? (x = _, hull) : x;
- };
+ /**
+ * Merges the function metadata of `source` into `data`.
+ *
+ * Merging metadata reduces the number of wrappers used to invoke a function.
+ * This is possible because methods like `_.bind`, `_.curry`, and `_.partial`
+ * may be applied regardless of execution order. Methods like `_.ary` and
+ * `_.rearg` modify function arguments, making the order in which they are
+ * executed important, preventing the merging of metadata. However, we make
+ * an exception for a safe combined case where curried functions have `_.ary`
+ * and or `_.rearg` applied.
+ *
+ * @private
+ * @param {Array} data The destination metadata.
+ * @param {Array} source The source metadata.
+ * @returns {Array} Returns `data`.
+ */
+ function mergeData(data, source) {
+ var bitmask = data[1],
+ srcBitmask = source[1],
+ newBitmask = bitmask | srcBitmask,
+ isCommon = newBitmask < (WRAP_BIND_FLAG | WRAP_BIND_KEY_FLAG | WRAP_ARY_FLAG);
+
+ var isCombo =
+ ((srcBitmask == WRAP_ARY_FLAG) && (bitmask == WRAP_CURRY_FLAG)) ||
+ ((srcBitmask == WRAP_ARY_FLAG) && (bitmask == WRAP_REARG_FLAG) && (data[7].length <= source[8])) ||
+ ((srcBitmask == (WRAP_ARY_FLAG | WRAP_REARG_FLAG)) && (source[7].length <= source[8]) && (bitmask == WRAP_CURRY_FLAG));
+
+ // Exit early if metadata can't be merged.
+ if (!(isCommon || isCombo)) {
+ return data;
+ }
+ // Use source `thisArg` if available.
+ if (srcBitmask & WRAP_BIND_FLAG) {
+ data[2] = source[2];
+ // Set when currying a bound function.
+ newBitmask |= bitmask & WRAP_BIND_FLAG ? 0 : WRAP_CURRY_BOUND_FLAG;
+ }
+ // Compose partial arguments.
+ var value = source[3];
+ if (value) {
+ var partials = data[3];
+ data[3] = partials ? composeArgs(partials, value, source[4]) : value;
+ data[4] = partials ? replaceHolders(data[3], PLACEHOLDER) : source[4];
+ }
+ // Compose partial right arguments.
+ value = source[5];
+ if (value) {
+ partials = data[5];
+ data[5] = partials ? composeArgsRight(partials, value, source[6]) : value;
+ data[6] = partials ? replaceHolders(data[5], PLACEHOLDER) : source[6];
+ }
+ // Use source `argPos` if available.
+ value = source[7];
+ if (value) {
+ data[7] = value;
+ }
+ // Use source `ary` if it's smaller.
+ if (srcBitmask & WRAP_ARY_FLAG) {
+ data[8] = data[8] == null ? source[8] : nativeMin(data[8], source[8]);
+ }
+ // Use source `arity` if one is not provided.
+ if (data[9] == null) {
+ data[9] = source[9];
+ }
+ // Use source `func` and merge bitmasks.
+ data[0] = source[0];
+ data[1] = newBitmask;
- hull.y = function(_) {
- return arguments.length ? (y = _, hull) : y;
- };
+ return data;
+ }
- return hull;
-};
+ /**
+ * This function is like
+ * [`Object.keys`](http://ecma-international.org/ecma-262/7.0/#sec-object.keys)
+ * except that it includes inherited enumerable properties.
+ *
+ * @private
+ * @param {Object} object The object to query.
+ * @returns {Array} Returns the array of property names.
+ */
+ function nativeKeysIn(object) {
+ var result = [];
+ if (object != null) {
+ for (var key in Object(object)) {
+ result.push(key);
+ }
+ }
+ return result;
+ }
-// finds the 'upper convex hull' (see wiki link above)
-// assumes points arg has >=3 elements, is sorted by x, unique in y
-// returns array of indices into points in left to right order
-function d3_geom_hullUpper(points) {
- var n = points.length,
- hull = [0, 1],
- hs = 2; // hull size
+ /**
+ * Converts `value` to a string using `Object.prototype.toString`.
+ *
+ * @private
+ * @param {*} value The value to convert.
+ * @returns {string} Returns the converted string.
+ */
+ function objectToString(value) {
+ return nativeObjectToString.call(value);
+ }
- for (var i = 2; i < n; i++) {
- while (hs > 1 && d3_cross2d(points[hull[hs-2]], points[hull[hs-1]], points[i]) <= 0) --hs;
- hull[hs++] = i;
- }
+ /**
+ * A specialized version of `baseRest` which transforms the rest array.
+ *
+ * @private
+ * @param {Function} func The function to apply a rest parameter to.
+ * @param {number} [start=func.length-1] The start position of the rest parameter.
+ * @param {Function} transform The rest array transform.
+ * @returns {Function} Returns the new function.
+ */
+ function overRest(func, start, transform) {
+ start = nativeMax(start === undefined ? (func.length - 1) : start, 0);
+ return function() {
+ var args = arguments,
+ index = -1,
+ length = nativeMax(args.length - start, 0),
+ array = Array(length);
- // we slice to make sure that the points we 'popped' from hull don't stay behind
- return hull.slice(0, hs);
-}
+ while (++index < length) {
+ array[index] = args[start + index];
+ }
+ index = -1;
+ var otherArgs = Array(start + 1);
+ while (++index < start) {
+ otherArgs[index] = args[index];
+ }
+ otherArgs[start] = transform(array);
+ return apply(func, this, otherArgs);
+ };
+ }
-// comparator for ascending sort by x-coord first, y-coord second
-function d3_geom_hullOrder(a, b) {
- return a[0] - b[0] || a[1] - b[1];
-}
-// import "../transition/transition";
+ /**
+ * Gets the parent value at `path` of `object`.
+ *
+ * @private
+ * @param {Object} object The object to query.
+ * @param {Array} path The path to get the parent value of.
+ * @returns {*} Returns the parent value.
+ */
+ function parent(object, path) {
+ return path.length < 2 ? object : baseGet(object, baseSlice(path, 0, -1));
+ }
-d3_selectionPrototype.transition = function(name) {
- var id = d3_transitionInheritId || ++d3_transitionId,
- ns = d3_transitionNamespace(name),
- subgroups = [],
- subgroup,
- node,
- transition = d3_transitionInherit || {time: Date.now(), ease: d3_ease_cubicInOut, delay: 0, duration: 250};
+ /**
+ * Reorder `array` according to the specified indexes where the element at
+ * the first index is assigned as the first element, the element at
+ * the second index is assigned as the second element, and so on.
+ *
+ * @private
+ * @param {Array} array The array to reorder.
+ * @param {Array} indexes The arranged array indexes.
+ * @returns {Array} Returns `array`.
+ */
+ function reorder(array, indexes) {
+ var arrLength = array.length,
+ length = nativeMin(indexes.length, arrLength),
+ oldArray = copyArray(array);
- for (var j = -1, m = this.length; ++j < m;) {
- subgroups.push(subgroup = []);
- for (var group = this[j], i = -1, n = group.length; ++i < n;) {
- if (node = group[i]) d3_transitionNode(node, i, ns, id, transition);
- subgroup.push(node);
+ while (length--) {
+ var index = indexes[length];
+ array[length] = isIndex(index, arrLength) ? oldArray[index] : undefined;
+ }
+ return array;
}
- }
- return d3_transition(subgroups, ns, id);
-};
-// import "../transition/transition";
+ /**
+ * Sets metadata for `func`.
+ *
+ * **Note:** If this function becomes hot, i.e. is invoked a lot in a short
+ * period of time, it will trip its breaker and transition to an identity
+ * function to avoid garbage collection pauses in V8. See
+ * [V8 issue 2070](https://bugs.chromium.org/p/v8/issues/detail?id=2070)
+ * for more details.
+ *
+ * @private
+ * @param {Function} func The function to associate metadata with.
+ * @param {*} data The metadata.
+ * @returns {Function} Returns `func`.
+ */
+ var setData = shortOut(baseSetData);
-// TODO Interrupt transitions for all namespaces?
-d3_selectionPrototype.interrupt = function(name) {
- return this.each(name == null
- ? d3_selection_interrupt
- : d3_selection_interruptNS(d3_transitionNamespace(name)));
-};
+ /**
+ * A simple wrapper around the global [`setTimeout`](https://mdn.io/setTimeout).
+ *
+ * @private
+ * @param {Function} func The function to delay.
+ * @param {number} wait The number of milliseconds to delay invocation.
+ * @returns {number|Object} Returns the timer id or timeout object.
+ */
+ var setTimeout = ctxSetTimeout || function(func, wait) {
+ return root.setTimeout(func, wait);
+ };
-var d3_selection_interrupt = d3_selection_interruptNS(d3_transitionNamespace());
+ /**
+ * Sets the `toString` method of `func` to return `string`.
+ *
+ * @private
+ * @param {Function} func The function to modify.
+ * @param {Function} string The `toString` result.
+ * @returns {Function} Returns `func`.
+ */
+ var setToString = shortOut(baseSetToString);
-function d3_selection_interruptNS(ns) {
- return function() {
- var lock, active;
- if ((lock = this[ns]) && (active = lock[lock.active])) {
- if (--lock.count) delete lock[lock.active];
- else delete this[ns];
- lock.active += .5;
- active.event && active.event.interrupt.call(this, this.__data__, active.index);
+ /**
+ * Sets the `toString` method of `wrapper` to mimic the source of `reference`
+ * with wrapper details in a comment at the top of the source body.
+ *
+ * @private
+ * @param {Function} wrapper The function to modify.
+ * @param {Function} reference The reference function.
+ * @param {number} bitmask The bitmask flags. See `createWrap` for more details.
+ * @returns {Function} Returns `wrapper`.
+ */
+ function setWrapToString(wrapper, reference, bitmask) {
+ var source = (reference + '');
+ return setToString(wrapper, insertWrapDetails(source, updateWrapDetails(getWrapDetails(source), bitmask)));
}
- };
-}
-function d3_transition(groups, ns, id) {
- d3_subclass(groups, d3_transitionPrototype);
+ /**
+ * Creates a function that'll short out and invoke `identity` instead
+ * of `func` when it's called `HOT_COUNT` or more times in `HOT_SPAN`
+ * milliseconds.
+ *
+ * @private
+ * @param {Function} func The function to restrict.
+ * @returns {Function} Returns the new shortable function.
+ */
+ function shortOut(func) {
+ var count = 0,
+ lastCalled = 0;
+
+ return function() {
+ var stamp = nativeNow(),
+ remaining = HOT_SPAN - (stamp - lastCalled);
+
+ lastCalled = stamp;
+ if (remaining > 0) {
+ if (++count >= HOT_COUNT) {
+ return arguments[0];
+ }
+ } else {
+ count = 0;
+ }
+ return func.apply(undefined, arguments);
+ };
+ }
- // Note: read-only!
- groups.namespace = ns;
- groups.id = id;
+ /**
+ * A specialized version of `_.shuffle` which mutates and sets the size of `array`.
+ *
+ * @private
+ * @param {Array} array The array to shuffle.
+ * @param {number} [size=array.length] The size of `array`.
+ * @returns {Array} Returns `array`.
+ */
+ function shuffleSelf(array, size) {
+ var index = -1,
+ length = array.length,
+ lastIndex = length - 1;
- return groups;
-}
+ size = size === undefined ? length : size;
+ while (++index < size) {
+ var rand = baseRandom(index, lastIndex),
+ value = array[rand];
-var d3_transitionPrototype = [],
- d3_transitionId = 0,
- d3_transitionInheritId,
- d3_transitionInherit;
+ array[rand] = array[index];
+ array[index] = value;
+ }
+ array.length = size;
+ return array;
+ }
-d3_transitionPrototype.call = d3_selectionPrototype.call;
-d3_transitionPrototype.empty = d3_selectionPrototype.empty;
-d3_transitionPrototype.node = d3_selectionPrototype.node;
-d3_transitionPrototype.size = d3_selectionPrototype.size;
+ /**
+ * Converts `string` to a property path array.
+ *
+ * @private
+ * @param {string} string The string to convert.
+ * @returns {Array} Returns the property path array.
+ */
+ var stringToPath = memoizeCapped(function(string) {
+ var result = [];
+ if (reLeadingDot.test(string)) {
+ result.push('');
+ }
+ string.replace(rePropName, function(match, number, quote, string) {
+ result.push(quote ? string.replace(reEscapeChar, '$1') : (number || match));
+ });
+ return result;
+ });
-d3.transition = function(selection, name) {
- return selection && selection.transition
- ? (d3_transitionInheritId ? selection.transition(name) : selection)
- : d3.selection().transition(selection);
-};
+ /**
+ * Converts `value` to a string key if it's not a string or symbol.
+ *
+ * @private
+ * @param {*} value The value to inspect.
+ * @returns {string|symbol} Returns the key.
+ */
+ function toKey(value) {
+ if (typeof value == 'string' || isSymbol(value)) {
+ return value;
+ }
+ var result = (value + '');
+ return (result == '0' && (1 / value) == -INFINITY) ? '-0' : result;
+ }
-d3.transition.prototype = d3_transitionPrototype;
+ /**
+ * Converts `func` to its source code.
+ *
+ * @private
+ * @param {Function} func The function to convert.
+ * @returns {string} Returns the source code.
+ */
+ function toSource(func) {
+ if (func != null) {
+ try {
+ return funcToString.call(func);
+ } catch (e) {}
+ try {
+ return (func + '');
+ } catch (e) {}
+ }
+ return '';
+ }
+ /**
+ * Updates wrapper `details` based on `bitmask` flags.
+ *
+ * @private
+ * @returns {Array} details The details to modify.
+ * @param {number} bitmask The bitmask flags. See `createWrap` for more details.
+ * @returns {Array} Returns `details`.
+ */
+ function updateWrapDetails(details, bitmask) {
+ arrayEach(wrapFlags, function(pair) {
+ var value = '_.' + pair[0];
+ if ((bitmask & pair[1]) && !arrayIncludes(details, value)) {
+ details.push(value);
+ }
+ });
+ return details.sort();
+ }
-d3_transitionPrototype.select = function(selector) {
- var id = this.id,
- ns = this.namespace,
- subgroups = [],
- subgroup,
- subnode,
- node;
+ /**
+ * Creates a clone of `wrapper`.
+ *
+ * @private
+ * @param {Object} wrapper The wrapper to clone.
+ * @returns {Object} Returns the cloned wrapper.
+ */
+ function wrapperClone(wrapper) {
+ if (wrapper instanceof LazyWrapper) {
+ return wrapper.clone();
+ }
+ var result = new LodashWrapper(wrapper.__wrapped__, wrapper.__chain__);
+ result.__actions__ = copyArray(wrapper.__actions__);
+ result.__index__ = wrapper.__index__;
+ result.__values__ = wrapper.__values__;
+ return result;
+ }
- selector = d3_selection_selector(selector);
+ /*------------------------------------------------------------------------*/
- for (var j = -1, m = this.length; ++j < m;) {
- subgroups.push(subgroup = []);
- for (var group = this[j], i = -1, n = group.length; ++i < n;) {
- if ((node = group[i]) && (subnode = selector.call(node, node.__data__, i, j))) {
- if ("__data__" in node) subnode.__data__ = node.__data__;
- d3_transitionNode(subnode, i, ns, id, node[ns][id]);
- subgroup.push(subnode);
+ /**
+ * Creates an array of elements split into groups the length of `size`.
+ * If `array` can't be split evenly, the final chunk will be the remaining
+ * elements.
+ *
+ * @static
+ * @memberOf _
+ * @since 3.0.0
+ * @category Array
+ * @param {Array} array The array to process.
+ * @param {number} [size=1] The length of each chunk
+ * @param- {Object} [guard] Enables use as an iteratee for methods like `_.map`.
+ * @returns {Array} Returns the new array of chunks.
+ * @example
+ *
+ * _.chunk(['a', 'b', 'c', 'd'], 2);
+ * // => [['a', 'b'], ['c', 'd']]
+ *
+ * _.chunk(['a', 'b', 'c', 'd'], 3);
+ * // => [['a', 'b', 'c'], ['d']]
+ */
+ function chunk(array, size, guard) {
+ if ((guard ? isIterateeCall(array, size, guard) : size === undefined)) {
+ size = 1;
} else {
- subgroup.push(null);
+ size = nativeMax(toInteger(size), 0);
}
- }
- }
-
- return d3_transition(subgroups, ns, id);
-};
+ var length = array == null ? 0 : array.length;
+ if (!length || size < 1) {
+ return [];
+ }
+ var index = 0,
+ resIndex = 0,
+ result = Array(nativeCeil(length / size));
-d3_transitionPrototype.selectAll = function(selector) {
- var id = this.id,
- ns = this.namespace,
- subgroups = [],
- subgroup,
- subnodes,
- node,
- subnode,
- transition;
+ while (index < length) {
+ result[resIndex++] = baseSlice(array, index, (index += size));
+ }
+ return result;
+ }
- selector = d3_selection_selectorAll(selector);
+ /**
+ * Creates an array with all falsey values removed. The values `false`, `null`,
+ * `0`, `""`, `undefined`, and `NaN` are falsey.
+ *
+ * @static
+ * @memberOf _
+ * @since 0.1.0
+ * @category Array
+ * @param {Array} array The array to compact.
+ * @returns {Array} Returns the new array of filtered values.
+ * @example
+ *
+ * _.compact([0, 1, false, 2, '', 3]);
+ * // => [1, 2, 3]
+ */
+ function compact(array) {
+ var index = -1,
+ length = array == null ? 0 : array.length,
+ resIndex = 0,
+ result = [];
- for (var j = -1, m = this.length; ++j < m;) {
- for (var group = this[j], i = -1, n = group.length; ++i < n;) {
- if (node = group[i]) {
- transition = node[ns][id];
- subnodes = selector.call(node, node.__data__, i, j);
- subgroups.push(subgroup = []);
- for (var k = -1, o = subnodes.length; ++k < o;) {
- if (subnode = subnodes[k]) d3_transitionNode(subnode, k, ns, id, transition);
- subgroup.push(subnode);
+ while (++index < length) {
+ var value = array[index];
+ if (value) {
+ result[resIndex++] = value;
}
}
+ return result;
}
- }
- return d3_transition(subgroups, ns, id);
-};
-
-d3_transitionPrototype.filter = function(filter) {
- var subgroups = [],
- subgroup,
- group,
- node;
-
- if (typeof filter !== "function") filter = d3_selection_filter(filter);
+ /**
+ * Creates a new array concatenating `array` with any additional arrays
+ * and/or values.
+ *
+ * @static
+ * @memberOf _
+ * @since 4.0.0
+ * @category Array
+ * @param {Array} array The array to concatenate.
+ * @param {...*} [values] The values to concatenate.
+ * @returns {Array} Returns the new concatenated array.
+ * @example
+ *
+ * var array = [1];
+ * var other = _.concat(array, 2, [3], [[4]]);
+ *
+ * console.log(other);
+ * // => [1, 2, 3, [4]]
+ *
+ * console.log(array);
+ * // => [1]
+ */
+ function concat() {
+ var length = arguments.length;
+ if (!length) {
+ return [];
+ }
+ var args = Array(length - 1),
+ array = arguments[0],
+ index = length;
- for (var j = 0, m = this.length; j < m; j++) {
- subgroups.push(subgroup = []);
- for (var group = this[j], i = 0, n = group.length; i < n; i++) {
- if ((node = group[i]) && filter.call(node, node.__data__, i, j)) {
- subgroup.push(node);
+ while (index--) {
+ args[index - 1] = arguments[index];
}
+ return arrayPush(isArray(array) ? copyArray(array) : [array], baseFlatten(args, 1));
}
- }
-
- return d3_transition(subgroups, this.namespace, this.id);
-};
-d3.color = d3_color;
-function d3_color() {}
-
-d3_color.prototype.toString = function() {
- return this.rgb() + "";
-};
-
-d3.hsl = d3_hsl;
-
-function d3_hsl(h, s, l) {
- return this instanceof d3_hsl ? void (this.h = +h, this.s = +s, this.l = +l)
- : arguments.length < 2 ? (h instanceof d3_hsl ? new d3_hsl(h.h, h.s, h.l)
- : d3_rgb_parse("" + h, d3_rgb_hsl, d3_hsl))
- : new d3_hsl(h, s, l);
-}
+ /**
+ * Creates an array of `array` values not included in the other given arrays
+ * using [`SameValueZero`](http://ecma-international.org/ecma-262/7.0/#sec-samevaluezero)
+ * for equality comparisons. The order and references of result values are
+ * determined by the first array.
+ *
+ * **Note:** Unlike `_.pullAll`, this method returns a new array.
+ *
+ * @static
+ * @memberOf _
+ * @since 0.1.0
+ * @category Array
+ * @param {Array} array The array to inspect.
+ * @param {...Array} [values] The values to exclude.
+ * @returns {Array} Returns the new array of filtered values.
+ * @see _.without, _.xor
+ * @example
+ *
+ * _.difference([2, 1], [2, 3]);
+ * // => [1]
+ */
+ var difference = baseRest(function(array, values) {
+ return isArrayLikeObject(array)
+ ? baseDifference(array, baseFlatten(values, 1, isArrayLikeObject, true))
+ : [];
+ });
-var d3_hslPrototype = d3_hsl.prototype = new d3_color;
+ /**
+ * This method is like `_.difference` except that it accepts `iteratee` which
+ * is invoked for each element of `array` and `values` to generate the criterion
+ * by which they're compared. The order and references of result values are
+ * determined by the first array. The iteratee is invoked with one argument:
+ * (value).
+ *
+ * **Note:** Unlike `_.pullAllBy`, this method returns a new array.
+ *
+ * @static
+ * @memberOf _
+ * @since 4.0.0
+ * @category Array
+ * @param {Array} array The array to inspect.
+ * @param {...Array} [values] The values to exclude.
+ * @param {Function} [iteratee=_.identity] The iteratee invoked per element.
+ * @returns {Array} Returns the new array of filtered values.
+ * @example
+ *
+ * _.differenceBy([2.1, 1.2], [2.3, 3.4], Math.floor);
+ * // => [1.2]
+ *
+ * // The `_.property` iteratee shorthand.
+ * _.differenceBy([{ 'x': 2 }, { 'x': 1 }], [{ 'x': 1 }], 'x');
+ * // => [{ 'x': 2 }]
+ */
+ var differenceBy = baseRest(function(array, values) {
+ var iteratee = last(values);
+ if (isArrayLikeObject(iteratee)) {
+ iteratee = undefined;
+ }
+ return isArrayLikeObject(array)
+ ? baseDifference(array, baseFlatten(values, 1, isArrayLikeObject, true), getIteratee(iteratee, 2))
+ : [];
+ });
-d3_hslPrototype.brighter = function(k) {
- k = Math.pow(0.7, arguments.length ? k : 1);
- return new d3_hsl(this.h, this.s, this.l / k);
-};
+ /**
+ * This method is like `_.difference` except that it accepts `comparator`
+ * which is invoked to compare elements of `array` to `values`. The order and
+ * references of result values are determined by the first array. The comparator
+ * is invoked with two arguments: (arrVal, othVal).
+ *
+ * **Note:** Unlike `_.pullAllWith`, this method returns a new array.
+ *
+ * @static
+ * @memberOf _
+ * @since 4.0.0
+ * @category Array
+ * @param {Array} array The array to inspect.
+ * @param {...Array} [values] The values to exclude.
+ * @param {Function} [comparator] The comparator invoked per element.
+ * @returns {Array} Returns the new array of filtered values.
+ * @example
+ *
+ * var objects = [{ 'x': 1, 'y': 2 }, { 'x': 2, 'y': 1 }];
+ *
+ * _.differenceWith(objects, [{ 'x': 1, 'y': 2 }], _.isEqual);
+ * // => [{ 'x': 2, 'y': 1 }]
+ */
+ var differenceWith = baseRest(function(array, values) {
+ var comparator = last(values);
+ if (isArrayLikeObject(comparator)) {
+ comparator = undefined;
+ }
+ return isArrayLikeObject(array)
+ ? baseDifference(array, baseFlatten(values, 1, isArrayLikeObject, true), undefined, comparator)
+ : [];
+ });
-d3_hslPrototype.darker = function(k) {
- k = Math.pow(0.7, arguments.length ? k : 1);
- return new d3_hsl(this.h, this.s, k * this.l);
-};
+ /**
+ * Creates a slice of `array` with `n` elements dropped from the beginning.
+ *
+ * @static
+ * @memberOf _
+ * @since 0.5.0
+ * @category Array
+ * @param {Array} array The array to query.
+ * @param {number} [n=1] The number of elements to drop.
+ * @param- {Object} [guard] Enables use as an iteratee for methods like `_.map`.
+ * @returns {Array} Returns the slice of `array`.
+ * @example
+ *
+ * _.drop([1, 2, 3]);
+ * // => [2, 3]
+ *
+ * _.drop([1, 2, 3], 2);
+ * // => [3]
+ *
+ * _.drop([1, 2, 3], 5);
+ * // => []
+ *
+ * _.drop([1, 2, 3], 0);
+ * // => [1, 2, 3]
+ */
+ function drop(array, n, guard) {
+ var length = array == null ? 0 : array.length;
+ if (!length) {
+ return [];
+ }
+ n = (guard || n === undefined) ? 1 : toInteger(n);
+ return baseSlice(array, n < 0 ? 0 : n, length);
+ }
-d3_hslPrototype.rgb = function() {
- return d3_hsl_rgb(this.h, this.s, this.l);
-};
-
-function d3_hsl_rgb(h, s, l) {
- var m1,
- m2;
-
- /* Some simple corrections for h, s and l. */
- h = isNaN(h) ? 0 : (h %= 360) < 0 ? h + 360 : h;
- s = isNaN(s) ? 0 : s < 0 ? 0 : s > 1 ? 1 : s;
- l = l < 0 ? 0 : l > 1 ? 1 : l;
-
- /* From FvD 13.37, CSS Color Module Level 3 */
- m2 = l <= .5 ? l * (1 + s) : l + s - l * s;
- m1 = 2 * l - m2;
-
- function v(h) {
- if (h > 360) h -= 360;
- else if (h < 0) h += 360;
- if (h < 60) return m1 + (m2 - m1) * h / 60;
- if (h < 180) return m2;
- if (h < 240) return m1 + (m2 - m1) * (240 - h) / 60;
- return m1;
- }
+ /**
+ * Creates a slice of `array` with `n` elements dropped from the end.
+ *
+ * @static
+ * @memberOf _
+ * @since 3.0.0
+ * @category Array
+ * @param {Array} array The array to query.
+ * @param {number} [n=1] The number of elements to drop.
+ * @param- {Object} [guard] Enables use as an iteratee for methods like `_.map`.
+ * @returns {Array} Returns the slice of `array`.
+ * @example
+ *
+ * _.dropRight([1, 2, 3]);
+ * // => [1, 2]
+ *
+ * _.dropRight([1, 2, 3], 2);
+ * // => [1]
+ *
+ * _.dropRight([1, 2, 3], 5);
+ * // => []
+ *
+ * _.dropRight([1, 2, 3], 0);
+ * // => [1, 2, 3]
+ */
+ function dropRight(array, n, guard) {
+ var length = array == null ? 0 : array.length;
+ if (!length) {
+ return [];
+ }
+ n = (guard || n === undefined) ? 1 : toInteger(n);
+ n = length - n;
+ return baseSlice(array, 0, n < 0 ? 0 : n);
+ }
- function vv(h) {
- return Math.round(v(h) * 255);
- }
+ /**
+ * Creates a slice of `array` excluding elements dropped from the end.
+ * Elements are dropped until `predicate` returns falsey. The predicate is
+ * invoked with three arguments: (value, index, array).
+ *
+ * @static
+ * @memberOf _
+ * @since 3.0.0
+ * @category Array
+ * @param {Array} array The array to query.
+ * @param {Function} [predicate=_.identity] The function invoked per iteration.
+ * @returns {Array} Returns the slice of `array`.
+ * @example
+ *
+ * var users = [
+ * { 'user': 'barney', 'active': true },
+ * { 'user': 'fred', 'active': false },
+ * { 'user': 'pebbles', 'active': false }
+ * ];
+ *
+ * _.dropRightWhile(users, function(o) { return !o.active; });
+ * // => objects for ['barney']
+ *
+ * // The `_.matches` iteratee shorthand.
+ * _.dropRightWhile(users, { 'user': 'pebbles', 'active': false });
+ * // => objects for ['barney', 'fred']
+ *
+ * // The `_.matchesProperty` iteratee shorthand.
+ * _.dropRightWhile(users, ['active', false]);
+ * // => objects for ['barney']
+ *
+ * // The `_.property` iteratee shorthand.
+ * _.dropRightWhile(users, 'active');
+ * // => objects for ['barney', 'fred', 'pebbles']
+ */
+ function dropRightWhile(array, predicate) {
+ return (array && array.length)
+ ? baseWhile(array, getIteratee(predicate, 3), true, true)
+ : [];
+ }
- return new d3_rgb(vv(h + 120), vv(h), vv(h - 120));
-}
+ /**
+ * Creates a slice of `array` excluding elements dropped from the beginning.
+ * Elements are dropped until `predicate` returns falsey. The predicate is
+ * invoked with three arguments: (value, index, array).
+ *
+ * @static
+ * @memberOf _
+ * @since 3.0.0
+ * @category Array
+ * @param {Array} array The array to query.
+ * @param {Function} [predicate=_.identity] The function invoked per iteration.
+ * @returns {Array} Returns the slice of `array`.
+ * @example
+ *
+ * var users = [
+ * { 'user': 'barney', 'active': false },
+ * { 'user': 'fred', 'active': false },
+ * { 'user': 'pebbles', 'active': true }
+ * ];
+ *
+ * _.dropWhile(users, function(o) { return !o.active; });
+ * // => objects for ['pebbles']
+ *
+ * // The `_.matches` iteratee shorthand.
+ * _.dropWhile(users, { 'user': 'barney', 'active': false });
+ * // => objects for ['fred', 'pebbles']
+ *
+ * // The `_.matchesProperty` iteratee shorthand.
+ * _.dropWhile(users, ['active', false]);
+ * // => objects for ['pebbles']
+ *
+ * // The `_.property` iteratee shorthand.
+ * _.dropWhile(users, 'active');
+ * // => objects for ['barney', 'fred', 'pebbles']
+ */
+ function dropWhile(array, predicate) {
+ return (array && array.length)
+ ? baseWhile(array, getIteratee(predicate, 3), true)
+ : [];
+ }
-d3.hcl = d3_hcl;
+ /**
+ * Fills elements of `array` with `value` from `start` up to, but not
+ * including, `end`.
+ *
+ * **Note:** This method mutates `array`.
+ *
+ * @static
+ * @memberOf _
+ * @since 3.2.0
+ * @category Array
+ * @param {Array} array The array to fill.
+ * @param {*} value The value to fill `array` with.
+ * @param {number} [start=0] The start position.
+ * @param {number} [end=array.length] The end position.
+ * @returns {Array} Returns `array`.
+ * @example
+ *
+ * var array = [1, 2, 3];
+ *
+ * _.fill(array, 'a');
+ * console.log(array);
+ * // => ['a', 'a', 'a']
+ *
+ * _.fill(Array(3), 2);
+ * // => [2, 2, 2]
+ *
+ * _.fill([4, 6, 8, 10], '*', 1, 3);
+ * // => [4, '*', '*', 10]
+ */
+ function fill(array, value, start, end) {
+ var length = array == null ? 0 : array.length;
+ if (!length) {
+ return [];
+ }
+ if (start && typeof start != 'number' && isIterateeCall(array, value, start)) {
+ start = 0;
+ end = length;
+ }
+ return baseFill(array, value, start, end);
+ }
-function d3_hcl(h, c, l) {
- return this instanceof d3_hcl ? void (this.h = +h, this.c = +c, this.l = +l)
- : arguments.length < 2 ? (h instanceof d3_hcl ? new d3_hcl(h.h, h.c, h.l)
- : (h instanceof d3_lab ? d3_lab_hcl(h.l, h.a, h.b)
- : d3_lab_hcl((h = d3_rgb_lab((h = d3.rgb(h)).r, h.g, h.b)).l, h.a, h.b)))
- : new d3_hcl(h, c, l);
-}
+ /**
+ * This method is like `_.find` except that it returns the index of the first
+ * element `predicate` returns truthy for instead of the element itself.
+ *
+ * @static
+ * @memberOf _
+ * @since 1.1.0
+ * @category Array
+ * @param {Array} array The array to inspect.
+ * @param {Function} [predicate=_.identity] The function invoked per iteration.
+ * @param {number} [fromIndex=0] The index to search from.
+ * @returns {number} Returns the index of the found element, else `-1`.
+ * @example
+ *
+ * var users = [
+ * { 'user': 'barney', 'active': false },
+ * { 'user': 'fred', 'active': false },
+ * { 'user': 'pebbles', 'active': true }
+ * ];
+ *
+ * _.findIndex(users, function(o) { return o.user == 'barney'; });
+ * // => 0
+ *
+ * // The `_.matches` iteratee shorthand.
+ * _.findIndex(users, { 'user': 'fred', 'active': false });
+ * // => 1
+ *
+ * // The `_.matchesProperty` iteratee shorthand.
+ * _.findIndex(users, ['active', false]);
+ * // => 0
+ *
+ * // The `_.property` iteratee shorthand.
+ * _.findIndex(users, 'active');
+ * // => 2
+ */
+ function findIndex(array, predicate, fromIndex) {
+ var length = array == null ? 0 : array.length;
+ if (!length) {
+ return -1;
+ }
+ var index = fromIndex == null ? 0 : toInteger(fromIndex);
+ if (index < 0) {
+ index = nativeMax(length + index, 0);
+ }
+ return baseFindIndex(array, getIteratee(predicate, 3), index);
+ }
-var d3_hclPrototype = d3_hcl.prototype = new d3_color;
+ /**
+ * This method is like `_.findIndex` except that it iterates over elements
+ * of `collection` from right to left.
+ *
+ * @static
+ * @memberOf _
+ * @since 2.0.0
+ * @category Array
+ * @param {Array} array The array to inspect.
+ * @param {Function} [predicate=_.identity] The function invoked per iteration.
+ * @param {number} [fromIndex=array.length-1] The index to search from.
+ * @returns {number} Returns the index of the found element, else `-1`.
+ * @example
+ *
+ * var users = [
+ * { 'user': 'barney', 'active': true },
+ * { 'user': 'fred', 'active': false },
+ * { 'user': 'pebbles', 'active': false }
+ * ];
+ *
+ * _.findLastIndex(users, function(o) { return o.user == 'pebbles'; });
+ * // => 2
+ *
+ * // The `_.matches` iteratee shorthand.
+ * _.findLastIndex(users, { 'user': 'barney', 'active': true });
+ * // => 0
+ *
+ * // The `_.matchesProperty` iteratee shorthand.
+ * _.findLastIndex(users, ['active', false]);
+ * // => 2
+ *
+ * // The `_.property` iteratee shorthand.
+ * _.findLastIndex(users, 'active');
+ * // => 0
+ */
+ function findLastIndex(array, predicate, fromIndex) {
+ var length = array == null ? 0 : array.length;
+ if (!length) {
+ return -1;
+ }
+ var index = length - 1;
+ if (fromIndex !== undefined) {
+ index = toInteger(fromIndex);
+ index = fromIndex < 0
+ ? nativeMax(length + index, 0)
+ : nativeMin(index, length - 1);
+ }
+ return baseFindIndex(array, getIteratee(predicate, 3), index, true);
+ }
-d3_hclPrototype.brighter = function(k) {
- return new d3_hcl(this.h, this.c, Math.min(100, this.l + d3_lab_K * (arguments.length ? k : 1)));
-};
+ /**
+ * Flattens `array` a single level deep.
+ *
+ * @static
+ * @memberOf _
+ * @since 0.1.0
+ * @category Array
+ * @param {Array} array The array to flatten.
+ * @returns {Array} Returns the new flattened array.
+ * @example
+ *
+ * _.flatten([1, [2, [3, [4]], 5]]);
+ * // => [1, 2, [3, [4]], 5]
+ */
+ function flatten(array) {
+ var length = array == null ? 0 : array.length;
+ return length ? baseFlatten(array, 1) : [];
+ }
-d3_hclPrototype.darker = function(k) {
- return new d3_hcl(this.h, this.c, Math.max(0, this.l - d3_lab_K * (arguments.length ? k : 1)));
-};
+ /**
+ * Recursively flattens `array`.
+ *
+ * @static
+ * @memberOf _
+ * @since 3.0.0
+ * @category Array
+ * @param {Array} array The array to flatten.
+ * @returns {Array} Returns the new flattened array.
+ * @example
+ *
+ * _.flattenDeep([1, [2, [3, [4]], 5]]);
+ * // => [1, 2, 3, 4, 5]
+ */
+ function flattenDeep(array) {
+ var length = array == null ? 0 : array.length;
+ return length ? baseFlatten(array, INFINITY) : [];
+ }
-d3_hclPrototype.rgb = function() {
- return d3_hcl_lab(this.h, this.c, this.l).rgb();
-};
+ /**
+ * Recursively flatten `array` up to `depth` times.
+ *
+ * @static
+ * @memberOf _
+ * @since 4.4.0
+ * @category Array
+ * @param {Array} array The array to flatten.
+ * @param {number} [depth=1] The maximum recursion depth.
+ * @returns {Array} Returns the new flattened array.
+ * @example
+ *
+ * var array = [1, [2, [3, [4]], 5]];
+ *
+ * _.flattenDepth(array, 1);
+ * // => [1, 2, [3, [4]], 5]
+ *
+ * _.flattenDepth(array, 2);
+ * // => [1, 2, 3, [4], 5]
+ */
+ function flattenDepth(array, depth) {
+ var length = array == null ? 0 : array.length;
+ if (!length) {
+ return [];
+ }
+ depth = depth === undefined ? 1 : toInteger(depth);
+ return baseFlatten(array, depth);
+ }
-function d3_hcl_lab(h, c, l) {
- if (isNaN(h)) h = 0;
- if (isNaN(c)) c = 0;
- return new d3_lab(l, Math.cos(h *= d3_radians) * c, Math.sin(h) * c);
-}
+ /**
+ * The inverse of `_.toPairs`; this method returns an object composed
+ * from key-value `pairs`.
+ *
+ * @static
+ * @memberOf _
+ * @since 4.0.0
+ * @category Array
+ * @param {Array} pairs The key-value pairs.
+ * @returns {Object} Returns the new object.
+ * @example
+ *
+ * _.fromPairs([['a', 1], ['b', 2]]);
+ * // => { 'a': 1, 'b': 2 }
+ */
+ function fromPairs(pairs) {
+ var index = -1,
+ length = pairs == null ? 0 : pairs.length,
+ result = {};
-d3.lab = d3_lab;
+ while (++index < length) {
+ var pair = pairs[index];
+ result[pair[0]] = pair[1];
+ }
+ return result;
+ }
-function d3_lab(l, a, b) {
- return this instanceof d3_lab ? void (this.l = +l, this.a = +a, this.b = +b)
- : arguments.length < 2 ? (l instanceof d3_lab ? new d3_lab(l.l, l.a, l.b)
- : (l instanceof d3_hcl ? d3_hcl_lab(l.h, l.c, l.l)
- : d3_rgb_lab((l = d3_rgb(l)).r, l.g, l.b)))
- : new d3_lab(l, a, b);
-}
+ /**
+ * Gets the first element of `array`.
+ *
+ * @static
+ * @memberOf _
+ * @since 0.1.0
+ * @alias first
+ * @category Array
+ * @param {Array} array The array to query.
+ * @returns {*} Returns the first element of `array`.
+ * @example
+ *
+ * _.head([1, 2, 3]);
+ * // => 1
+ *
+ * _.head([]);
+ * // => undefined
+ */
+ function head(array) {
+ return (array && array.length) ? array[0] : undefined;
+ }
-// Corresponds roughly to RGB brighter/darker
-var d3_lab_K = 18;
+ /**
+ * Gets the index at which the first occurrence of `value` is found in `array`
+ * using [`SameValueZero`](http://ecma-international.org/ecma-262/7.0/#sec-samevaluezero)
+ * for equality comparisons. If `fromIndex` is negative, it's used as the
+ * offset from the end of `array`.
+ *
+ * @static
+ * @memberOf _
+ * @since 0.1.0
+ * @category Array
+ * @param {Array} array The array to inspect.
+ * @param {*} value The value to search for.
+ * @param {number} [fromIndex=0] The index to search from.
+ * @returns {number} Returns the index of the matched value, else `-1`.
+ * @example
+ *
+ * _.indexOf([1, 2, 1, 2], 2);
+ * // => 1
+ *
+ * // Search from the `fromIndex`.
+ * _.indexOf([1, 2, 1, 2], 2, 2);
+ * // => 3
+ */
+ function indexOf(array, value, fromIndex) {
+ var length = array == null ? 0 : array.length;
+ if (!length) {
+ return -1;
+ }
+ var index = fromIndex == null ? 0 : toInteger(fromIndex);
+ if (index < 0) {
+ index = nativeMax(length + index, 0);
+ }
+ return baseIndexOf(array, value, index);
+ }
-// D65 standard referent
-var d3_lab_X = 0.950470,
- d3_lab_Y = 1,
- d3_lab_Z = 1.088830;
+ /**
+ * Gets all but the last element of `array`.
+ *
+ * @static
+ * @memberOf _
+ * @since 0.1.0
+ * @category Array
+ * @param {Array} array The array to query.
+ * @returns {Array} Returns the slice of `array`.
+ * @example
+ *
+ * _.initial([1, 2, 3]);
+ * // => [1, 2]
+ */
+ function initial(array) {
+ var length = array == null ? 0 : array.length;
+ return length ? baseSlice(array, 0, -1) : [];
+ }
-var d3_labPrototype = d3_lab.prototype = new d3_color;
+ /**
+ * Creates an array of unique values that are included in all given arrays
+ * using [`SameValueZero`](http://ecma-international.org/ecma-262/7.0/#sec-samevaluezero)
+ * for equality comparisons. The order and references of result values are
+ * determined by the first array.
+ *
+ * @static
+ * @memberOf _
+ * @since 0.1.0
+ * @category Array
+ * @param {...Array} [arrays] The arrays to inspect.
+ * @returns {Array} Returns the new array of intersecting values.
+ * @example
+ *
+ * _.intersection([2, 1], [2, 3]);
+ * // => [2]
+ */
+ var intersection = baseRest(function(arrays) {
+ var mapped = arrayMap(arrays, castArrayLikeObject);
+ return (mapped.length && mapped[0] === arrays[0])
+ ? baseIntersection(mapped)
+ : [];
+ });
-d3_labPrototype.brighter = function(k) {
- return new d3_lab(Math.min(100, this.l + d3_lab_K * (arguments.length ? k : 1)), this.a, this.b);
-};
+ /**
+ * This method is like `_.intersection` except that it accepts `iteratee`
+ * which is invoked for each element of each `arrays` to generate the criterion
+ * by which they're compared. The order and references of result values are
+ * determined by the first array. The iteratee is invoked with one argument:
+ * (value).
+ *
+ * @static
+ * @memberOf _
+ * @since 4.0.0
+ * @category Array
+ * @param {...Array} [arrays] The arrays to inspect.
+ * @param {Function} [iteratee=_.identity] The iteratee invoked per element.
+ * @returns {Array} Returns the new array of intersecting values.
+ * @example
+ *
+ * _.intersectionBy([2.1, 1.2], [2.3, 3.4], Math.floor);
+ * // => [2.1]
+ *
+ * // The `_.property` iteratee shorthand.
+ * _.intersectionBy([{ 'x': 1 }], [{ 'x': 2 }, { 'x': 1 }], 'x');
+ * // => [{ 'x': 1 }]
+ */
+ var intersectionBy = baseRest(function(arrays) {
+ var iteratee = last(arrays),
+ mapped = arrayMap(arrays, castArrayLikeObject);
-d3_labPrototype.darker = function(k) {
- return new d3_lab(Math.max(0, this.l - d3_lab_K * (arguments.length ? k : 1)), this.a, this.b);
-};
+ if (iteratee === last(mapped)) {
+ iteratee = undefined;
+ } else {
+ mapped.pop();
+ }
+ return (mapped.length && mapped[0] === arrays[0])
+ ? baseIntersection(mapped, getIteratee(iteratee, 2))
+ : [];
+ });
-d3_labPrototype.rgb = function() {
- return d3_lab_rgb(this.l, this.a, this.b);
-};
+ /**
+ * This method is like `_.intersection` except that it accepts `comparator`
+ * which is invoked to compare elements of `arrays`. The order and references
+ * of result values are determined by the first array. The comparator is
+ * invoked with two arguments: (arrVal, othVal).
+ *
+ * @static
+ * @memberOf _
+ * @since 4.0.0
+ * @category Array
+ * @param {...Array} [arrays] The arrays to inspect.
+ * @param {Function} [comparator] The comparator invoked per element.
+ * @returns {Array} Returns the new array of intersecting values.
+ * @example
+ *
+ * var objects = [{ 'x': 1, 'y': 2 }, { 'x': 2, 'y': 1 }];
+ * var others = [{ 'x': 1, 'y': 1 }, { 'x': 1, 'y': 2 }];
+ *
+ * _.intersectionWith(objects, others, _.isEqual);
+ * // => [{ 'x': 1, 'y': 2 }]
+ */
+ var intersectionWith = baseRest(function(arrays) {
+ var comparator = last(arrays),
+ mapped = arrayMap(arrays, castArrayLikeObject);
-function d3_lab_rgb(l, a, b) {
- var y = (l + 16) / 116,
- x = y + a / 500,
- z = y - b / 200;
- x = d3_lab_xyz(x) * d3_lab_X;
- y = d3_lab_xyz(y) * d3_lab_Y;
- z = d3_lab_xyz(z) * d3_lab_Z;
- return new d3_rgb(
- d3_xyz_rgb( 3.2404542 * x - 1.5371385 * y - 0.4985314 * z),
- d3_xyz_rgb(-0.9692660 * x + 1.8760108 * y + 0.0415560 * z),
- d3_xyz_rgb( 0.0556434 * x - 0.2040259 * y + 1.0572252 * z)
- );
-}
+ comparator = typeof comparator == 'function' ? comparator : undefined;
+ if (comparator) {
+ mapped.pop();
+ }
+ return (mapped.length && mapped[0] === arrays[0])
+ ? baseIntersection(mapped, undefined, comparator)
+ : [];
+ });
-function d3_lab_hcl(l, a, b) {
- return l > 0
- ? new d3_hcl(Math.atan2(b, a) * d3_degrees, Math.sqrt(a * a + b * b), l)
- : new d3_hcl(NaN, NaN, l);
-}
+ /**
+ * Converts all elements in `array` into a string separated by `separator`.
+ *
+ * @static
+ * @memberOf _
+ * @since 4.0.0
+ * @category Array
+ * @param {Array} array The array to convert.
+ * @param {string} [separator=','] The element separator.
+ * @returns {string} Returns the joined string.
+ * @example
+ *
+ * _.join(['a', 'b', 'c'], '~');
+ * // => 'a~b~c'
+ */
+ function join(array, separator) {
+ return array == null ? '' : nativeJoin.call(array, separator);
+ }
-function d3_lab_xyz(x) {
- return x > 0.206893034 ? x * x * x : (x - 4 / 29) / 7.787037;
-}
-function d3_xyz_lab(x) {
- return x > 0.008856 ? Math.pow(x, 1 / 3) : 7.787037 * x + 4 / 29;
-}
+ /**
+ * Gets the last element of `array`.
+ *
+ * @static
+ * @memberOf _
+ * @since 0.1.0
+ * @category Array
+ * @param {Array} array The array to query.
+ * @returns {*} Returns the last element of `array`.
+ * @example
+ *
+ * _.last([1, 2, 3]);
+ * // => 3
+ */
+ function last(array) {
+ var length = array == null ? 0 : array.length;
+ return length ? array[length - 1] : undefined;
+ }
-function d3_xyz_rgb(r) {
- return Math.round(255 * (r <= 0.00304 ? 12.92 * r : 1.055 * Math.pow(r, 1 / 2.4) - 0.055));
-}
+ /**
+ * This method is like `_.indexOf` except that it iterates over elements of
+ * `array` from right to left.
+ *
+ * @static
+ * @memberOf _
+ * @since 0.1.0
+ * @category Array
+ * @param {Array} array The array to inspect.
+ * @param {*} value The value to search for.
+ * @param {number} [fromIndex=array.length-1] The index to search from.
+ * @returns {number} Returns the index of the matched value, else `-1`.
+ * @example
+ *
+ * _.lastIndexOf([1, 2, 1, 2], 2);
+ * // => 3
+ *
+ * // Search from the `fromIndex`.
+ * _.lastIndexOf([1, 2, 1, 2], 2, 2);
+ * // => 1
+ */
+ function lastIndexOf(array, value, fromIndex) {
+ var length = array == null ? 0 : array.length;
+ if (!length) {
+ return -1;
+ }
+ var index = length;
+ if (fromIndex !== undefined) {
+ index = toInteger(fromIndex);
+ index = index < 0 ? nativeMax(length + index, 0) : nativeMin(index, length - 1);
+ }
+ return value === value
+ ? strictLastIndexOf(array, value, index)
+ : baseFindIndex(array, baseIsNaN, index, true);
+ }
-d3.rgb = d3_rgb;
+ /**
+ * Gets the element at index `n` of `array`. If `n` is negative, the nth
+ * element from the end is returned.
+ *
+ * @static
+ * @memberOf _
+ * @since 4.11.0
+ * @category Array
+ * @param {Array} array The array to query.
+ * @param {number} [n=0] The index of the element to return.
+ * @returns {*} Returns the nth element of `array`.
+ * @example
+ *
+ * var array = ['a', 'b', 'c', 'd'];
+ *
+ * _.nth(array, 1);
+ * // => 'b'
+ *
+ * _.nth(array, -2);
+ * // => 'c';
+ */
+ function nth(array, n) {
+ return (array && array.length) ? baseNth(array, toInteger(n)) : undefined;
+ }
-function d3_rgb(r, g, b) {
- return this instanceof d3_rgb ? void (this.r = ~~r, this.g = ~~g, this.b = ~~b)
- : arguments.length < 2 ? (r instanceof d3_rgb ? new d3_rgb(r.r, r.g, r.b)
- : d3_rgb_parse("" + r, d3_rgb, d3_hsl_rgb))
- : new d3_rgb(r, g, b);
-}
+ /**
+ * Removes all given values from `array` using
+ * [`SameValueZero`](http://ecma-international.org/ecma-262/7.0/#sec-samevaluezero)
+ * for equality comparisons.
+ *
+ * **Note:** Unlike `_.without`, this method mutates `array`. Use `_.remove`
+ * to remove elements from an array by predicate.
+ *
+ * @static
+ * @memberOf _
+ * @since 2.0.0
+ * @category Array
+ * @param {Array} array The array to modify.
+ * @param {...*} [values] The values to remove.
+ * @returns {Array} Returns `array`.
+ * @example
+ *
+ * var array = ['a', 'b', 'c', 'a', 'b', 'c'];
+ *
+ * _.pull(array, 'a', 'c');
+ * console.log(array);
+ * // => ['b', 'b']
+ */
+ var pull = baseRest(pullAll);
-function d3_rgbNumber(value) {
- return new d3_rgb(value >> 16, value >> 8 & 0xff, value & 0xff);
-}
+ /**
+ * This method is like `_.pull` except that it accepts an array of values to remove.
+ *
+ * **Note:** Unlike `_.difference`, this method mutates `array`.
+ *
+ * @static
+ * @memberOf _
+ * @since 4.0.0
+ * @category Array
+ * @param {Array} array The array to modify.
+ * @param {Array} values The values to remove.
+ * @returns {Array} Returns `array`.
+ * @example
+ *
+ * var array = ['a', 'b', 'c', 'a', 'b', 'c'];
+ *
+ * _.pullAll(array, ['a', 'c']);
+ * console.log(array);
+ * // => ['b', 'b']
+ */
+ function pullAll(array, values) {
+ return (array && array.length && values && values.length)
+ ? basePullAll(array, values)
+ : array;
+ }
-function d3_rgbString(value) {
- return d3_rgbNumber(value) + "";
-}
+ /**
+ * This method is like `_.pullAll` except that it accepts `iteratee` which is
+ * invoked for each element of `array` and `values` to generate the criterion
+ * by which they're compared. The iteratee is invoked with one argument: (value).
+ *
+ * **Note:** Unlike `_.differenceBy`, this method mutates `array`.
+ *
+ * @static
+ * @memberOf _
+ * @since 4.0.0
+ * @category Array
+ * @param {Array} array The array to modify.
+ * @param {Array} values The values to remove.
+ * @param {Function} [iteratee=_.identity] The iteratee invoked per element.
+ * @returns {Array} Returns `array`.
+ * @example
+ *
+ * var array = [{ 'x': 1 }, { 'x': 2 }, { 'x': 3 }, { 'x': 1 }];
+ *
+ * _.pullAllBy(array, [{ 'x': 1 }, { 'x': 3 }], 'x');
+ * console.log(array);
+ * // => [{ 'x': 2 }]
+ */
+ function pullAllBy(array, values, iteratee) {
+ return (array && array.length && values && values.length)
+ ? basePullAll(array, values, getIteratee(iteratee, 2))
+ : array;
+ }
-var d3_rgbPrototype = d3_rgb.prototype = new d3_color;
+ /**
+ * This method is like `_.pullAll` except that it accepts `comparator` which
+ * is invoked to compare elements of `array` to `values`. The comparator is
+ * invoked with two arguments: (arrVal, othVal).
+ *
+ * **Note:** Unlike `_.differenceWith`, this method mutates `array`.
+ *
+ * @static
+ * @memberOf _
+ * @since 4.6.0
+ * @category Array
+ * @param {Array} array The array to modify.
+ * @param {Array} values The values to remove.
+ * @param {Function} [comparator] The comparator invoked per element.
+ * @returns {Array} Returns `array`.
+ * @example
+ *
+ * var array = [{ 'x': 1, 'y': 2 }, { 'x': 3, 'y': 4 }, { 'x': 5, 'y': 6 }];
+ *
+ * _.pullAllWith(array, [{ 'x': 3, 'y': 4 }], _.isEqual);
+ * console.log(array);
+ * // => [{ 'x': 1, 'y': 2 }, { 'x': 5, 'y': 6 }]
+ */
+ function pullAllWith(array, values, comparator) {
+ return (array && array.length && values && values.length)
+ ? basePullAll(array, values, undefined, comparator)
+ : array;
+ }
-d3_rgbPrototype.brighter = function(k) {
- k = Math.pow(0.7, arguments.length ? k : 1);
- var r = this.r,
- g = this.g,
- b = this.b,
- i = 30;
- if (!r && !g && !b) return new d3_rgb(i, i, i);
- if (r && r < i) r = i;
- if (g && g < i) g = i;
- if (b && b < i) b = i;
- return new d3_rgb(Math.min(255, r / k), Math.min(255, g / k), Math.min(255, b / k));
-};
+ /**
+ * Removes elements from `array` corresponding to `indexes` and returns an
+ * array of removed elements.
+ *
+ * **Note:** Unlike `_.at`, this method mutates `array`.
+ *
+ * @static
+ * @memberOf _
+ * @since 3.0.0
+ * @category Array
+ * @param {Array} array The array to modify.
+ * @param {...(number|number[])} [indexes] The indexes of elements to remove.
+ * @returns {Array} Returns the new array of removed elements.
+ * @example
+ *
+ * var array = ['a', 'b', 'c', 'd'];
+ * var pulled = _.pullAt(array, [1, 3]);
+ *
+ * console.log(array);
+ * // => ['a', 'c']
+ *
+ * console.log(pulled);
+ * // => ['b', 'd']
+ */
+ var pullAt = flatRest(function(array, indexes) {
+ var length = array == null ? 0 : array.length,
+ result = baseAt(array, indexes);
-d3_rgbPrototype.darker = function(k) {
- k = Math.pow(0.7, arguments.length ? k : 1);
- return new d3_rgb(k * this.r, k * this.g, k * this.b);
-};
+ basePullAt(array, arrayMap(indexes, function(index) {
+ return isIndex(index, length) ? +index : index;
+ }).sort(compareAscending));
-d3_rgbPrototype.hsl = function() {
- return d3_rgb_hsl(this.r, this.g, this.b);
-};
+ return result;
+ });
-d3_rgbPrototype.toString = function() {
- return "#" + d3_rgb_hex(this.r) + d3_rgb_hex(this.g) + d3_rgb_hex(this.b);
-};
+ /**
+ * Removes all elements from `array` that `predicate` returns truthy for
+ * and returns an array of the removed elements. The predicate is invoked
+ * with three arguments: (value, index, array).
+ *
+ * **Note:** Unlike `_.filter`, this method mutates `array`. Use `_.pull`
+ * to pull elements from an array by value.
+ *
+ * @static
+ * @memberOf _
+ * @since 2.0.0
+ * @category Array
+ * @param {Array} array The array to modify.
+ * @param {Function} [predicate=_.identity] The function invoked per iteration.
+ * @returns {Array} Returns the new array of removed elements.
+ * @example
+ *
+ * var array = [1, 2, 3, 4];
+ * var evens = _.remove(array, function(n) {
+ * return n % 2 == 0;
+ * });
+ *
+ * console.log(array);
+ * // => [1, 3]
+ *
+ * console.log(evens);
+ * // => [2, 4]
+ */
+ function remove(array, predicate) {
+ var result = [];
+ if (!(array && array.length)) {
+ return result;
+ }
+ var index = -1,
+ indexes = [],
+ length = array.length;
-function d3_rgb_hex(v) {
- return v < 0x10
- ? "0" + Math.max(0, v).toString(16)
- : Math.min(255, v).toString(16);
-}
+ predicate = getIteratee(predicate, 3);
+ while (++index < length) {
+ var value = array[index];
+ if (predicate(value, index, array)) {
+ result.push(value);
+ indexes.push(index);
+ }
+ }
+ basePullAt(array, indexes);
+ return result;
+ }
-function d3_rgb_parse(format, rgb, hsl) {
- var r = 0, // red channel; int in [0, 255]
- g = 0, // green channel; int in [0, 255]
- b = 0, // blue channel; int in [0, 255]
- m1, // CSS color specification match
- m2, // CSS color specification type (e.g., rgb)
- color;
+ /**
+ * Reverses `array` so that the first element becomes the last, the second
+ * element becomes the second to last, and so on.
+ *
+ * **Note:** This method mutates `array` and is based on
+ * [`Array#reverse`](https://mdn.io/Array/reverse).
+ *
+ * @static
+ * @memberOf _
+ * @since 4.0.0
+ * @category Array
+ * @param {Array} array The array to modify.
+ * @returns {Array} Returns `array`.
+ * @example
+ *
+ * var array = [1, 2, 3];
+ *
+ * _.reverse(array);
+ * // => [3, 2, 1]
+ *
+ * console.log(array);
+ * // => [3, 2, 1]
+ */
+ function reverse(array) {
+ return array == null ? array : nativeReverse.call(array);
+ }
- /* Handle hsl, rgb. */
- m1 = /([a-z]+)\((.*)\)/i.exec(format);
- if (m1) {
- m2 = m1[2].split(",");
- switch (m1[1]) {
- case "hsl": {
- return hsl(
- parseFloat(m2[0]), // degrees
- parseFloat(m2[1]) / 100, // percentage
- parseFloat(m2[2]) / 100 // percentage
- );
+ /**
+ * Creates a slice of `array` from `start` up to, but not including, `end`.
+ *
+ * **Note:** This method is used instead of
+ * [`Array#slice`](https://mdn.io/Array/slice) to ensure dense arrays are
+ * returned.
+ *
+ * @static
+ * @memberOf _
+ * @since 3.0.0
+ * @category Array
+ * @param {Array} array The array to slice.
+ * @param {number} [start=0] The start position.
+ * @param {number} [end=array.length] The end position.
+ * @returns {Array} Returns the slice of `array`.
+ */
+ function slice(array, start, end) {
+ var length = array == null ? 0 : array.length;
+ if (!length) {
+ return [];
}
- case "rgb": {
- return rgb(
- d3_rgb_parseNumber(m2[0]),
- d3_rgb_parseNumber(m2[1]),
- d3_rgb_parseNumber(m2[2])
- );
+ if (end && typeof end != 'number' && isIterateeCall(array, start, end)) {
+ start = 0;
+ end = length;
+ }
+ else {
+ start = start == null ? 0 : toInteger(start);
+ end = end === undefined ? length : toInteger(end);
}
+ return baseSlice(array, start, end);
}
- }
- /* Named colors. */
- if (color = d3_rgb_names.get(format.toLowerCase())) {
- return rgb(color.r, color.g, color.b);
+ /**
+ * Uses a binary search to determine the lowest index at which `value`
+ * should be inserted into `array` in order to maintain its sort order.
+ *
+ * @static
+ * @memberOf _
+ * @since 0.1.0
+ * @category Array
+ * @param {Array} array The sorted array to inspect.
+ * @param {*} value The value to evaluate.
+ * @returns {number} Returns the index at which `value` should be inserted
+ * into `array`.
+ * @example
+ *
+ * _.sortedIndex([30, 50], 40);
+ * // => 1
+ */
+ function sortedIndex(array, value) {
+ return baseSortedIndex(array, value);
+ }
+
+ /**
+ * This method is like `_.sortedIndex` except that it accepts `iteratee`
+ * which is invoked for `value` and each element of `array` to compute their
+ * sort ranking. The iteratee is invoked with one argument: (value).
+ *
+ * @static
+ * @memberOf _
+ * @since 4.0.0
+ * @category Array
+ * @param {Array} array The sorted array to inspect.
+ * @param {*} value The value to evaluate.
+ * @param {Function} [iteratee=_.identity] The iteratee invoked per element.
+ * @returns {number} Returns the index at which `value` should be inserted
+ * into `array`.
+ * @example
+ *
+ * var objects = [{ 'x': 4 }, { 'x': 5 }];
+ *
+ * _.sortedIndexBy(objects, { 'x': 4 }, function(o) { return o.x; });
+ * // => 0
+ *
+ * // The `_.property` iteratee shorthand.
+ * _.sortedIndexBy(objects, { 'x': 4 }, 'x');
+ * // => 0
+ */
+ function sortedIndexBy(array, value, iteratee) {
+ return baseSortedIndexBy(array, value, getIteratee(iteratee, 2));
+ }
+
+ /**
+ * This method is like `_.indexOf` except that it performs a binary
+ * search on a sorted `array`.
+ *
+ * @static
+ * @memberOf _
+ * @since 4.0.0
+ * @category Array
+ * @param {Array} array The array to inspect.
+ * @param {*} value The value to search for.
+ * @returns {number} Returns the index of the matched value, else `-1`.
+ * @example
+ *
+ * _.sortedIndexOf([4, 5, 5, 5, 6], 5);
+ * // => 1
+ */
+ function sortedIndexOf(array, value) {
+ var length = array == null ? 0 : array.length;
+ if (length) {
+ var index = baseSortedIndex(array, value);
+ if (index < length && eq(array[index], value)) {
+ return index;
+ }
+ }
+ return -1;
+ }
+
+ /**
+ * This method is like `_.sortedIndex` except that it returns the highest
+ * index at which `value` should be inserted into `array` in order to
+ * maintain its sort order.
+ *
+ * @static
+ * @memberOf _
+ * @since 3.0.0
+ * @category Array
+ * @param {Array} array The sorted array to inspect.
+ * @param {*} value The value to evaluate.
+ * @returns {number} Returns the index at which `value` should be inserted
+ * into `array`.
+ * @example
+ *
+ * _.sortedLastIndex([4, 5, 5, 5, 6], 5);
+ * // => 4
+ */
+ function sortedLastIndex(array, value) {
+ return baseSortedIndex(array, value, true);
+ }
+
+ /**
+ * This method is like `_.sortedLastIndex` except that it accepts `iteratee`
+ * which is invoked for `value` and each element of `array` to compute their
+ * sort ranking. The iteratee is invoked with one argument: (value).
+ *
+ * @static
+ * @memberOf _
+ * @since 4.0.0
+ * @category Array
+ * @param {Array} array The sorted array to inspect.
+ * @param {*} value The value to evaluate.
+ * @param {Function} [iteratee=_.identity] The iteratee invoked per element.
+ * @returns {number} Returns the index at which `value` should be inserted
+ * into `array`.
+ * @example
+ *
+ * var objects = [{ 'x': 4 }, { 'x': 5 }];
+ *
+ * _.sortedLastIndexBy(objects, { 'x': 4 }, function(o) { return o.x; });
+ * // => 1
+ *
+ * // The `_.property` iteratee shorthand.
+ * _.sortedLastIndexBy(objects, { 'x': 4 }, 'x');
+ * // => 1
+ */
+ function sortedLastIndexBy(array, value, iteratee) {
+ return baseSortedIndexBy(array, value, getIteratee(iteratee, 2), true);
+ }
+
+ /**
+ * This method is like `_.lastIndexOf` except that it performs a binary
+ * search on a sorted `array`.
+ *
+ * @static
+ * @memberOf _
+ * @since 4.0.0
+ * @category Array
+ * @param {Array} array The array to inspect.
+ * @param {*} value The value to search for.
+ * @returns {number} Returns the index of the matched value, else `-1`.
+ * @example
+ *
+ * _.sortedLastIndexOf([4, 5, 5, 5, 6], 5);
+ * // => 3
+ */
+ function sortedLastIndexOf(array, value) {
+ var length = array == null ? 0 : array.length;
+ if (length) {
+ var index = baseSortedIndex(array, value, true) - 1;
+ if (eq(array[index], value)) {
+ return index;
+ }
+ }
+ return -1;
+ }
+
+ /**
+ * This method is like `_.uniq` except that it's designed and optimized
+ * for sorted arrays.
+ *
+ * @static
+ * @memberOf _
+ * @since 4.0.0
+ * @category Array
+ * @param {Array} array The array to inspect.
+ * @returns {Array} Returns the new duplicate free array.
+ * @example
+ *
+ * _.sortedUniq([1, 1, 2]);
+ * // => [1, 2]
+ */
+ function sortedUniq(array) {
+ return (array && array.length)
+ ? baseSortedUniq(array)
+ : [];
+ }
+
+ /**
+ * This method is like `_.uniqBy` except that it's designed and optimized
+ * for sorted arrays.
+ *
+ * @static
+ * @memberOf _
+ * @since 4.0.0
+ * @category Array
+ * @param {Array} array The array to inspect.
+ * @param {Function} [iteratee] The iteratee invoked per element.
+ * @returns {Array} Returns the new duplicate free array.
+ * @example
+ *
+ * _.sortedUniqBy([1.1, 1.2, 2.3, 2.4], Math.floor);
+ * // => [1.1, 2.3]
+ */
+ function sortedUniqBy(array, iteratee) {
+ return (array && array.length)
+ ? baseSortedUniq(array, getIteratee(iteratee, 2))
+ : [];
+ }
+
+ /**
+ * Gets all but the first element of `array`.
+ *
+ * @static
+ * @memberOf _
+ * @since 4.0.0
+ * @category Array
+ * @param {Array} array The array to query.
+ * @returns {Array} Returns the slice of `array`.
+ * @example
+ *
+ * _.tail([1, 2, 3]);
+ * // => [2, 3]
+ */
+ function tail(array) {
+ var length = array == null ? 0 : array.length;
+ return length ? baseSlice(array, 1, length) : [];
+ }
+
+ /**
+ * Creates a slice of `array` with `n` elements taken from the beginning.
+ *
+ * @static
+ * @memberOf _
+ * @since 0.1.0
+ * @category Array
+ * @param {Array} array The array to query.
+ * @param {number} [n=1] The number of elements to take.
+ * @param- {Object} [guard] Enables use as an iteratee for methods like `_.map`.
+ * @returns {Array} Returns the slice of `array`.
+ * @example
+ *
+ * _.take([1, 2, 3]);
+ * // => [1]
+ *
+ * _.take([1, 2, 3], 2);
+ * // => [1, 2]
+ *
+ * _.take([1, 2, 3], 5);
+ * // => [1, 2, 3]
+ *
+ * _.take([1, 2, 3], 0);
+ * // => []
+ */
+ function take(array, n, guard) {
+ if (!(array && array.length)) {
+ return [];
+ }
+ n = (guard || n === undefined) ? 1 : toInteger(n);
+ return baseSlice(array, 0, n < 0 ? 0 : n);
+ }
+
+ /**
+ * Creates a slice of `array` with `n` elements taken from the end.
+ *
+ * @static
+ * @memberOf _
+ * @since 3.0.0
+ * @category Array
+ * @param {Array} array The array to query.
+ * @param {number} [n=1] The number of elements to take.
+ * @param- {Object} [guard] Enables use as an iteratee for methods like `_.map`.
+ * @returns {Array} Returns the slice of `array`.
+ * @example
+ *
+ * _.takeRight([1, 2, 3]);
+ * // => [3]
+ *
+ * _.takeRight([1, 2, 3], 2);
+ * // => [2, 3]
+ *
+ * _.takeRight([1, 2, 3], 5);
+ * // => [1, 2, 3]
+ *
+ * _.takeRight([1, 2, 3], 0);
+ * // => []
+ */
+ function takeRight(array, n, guard) {
+ var length = array == null ? 0 : array.length;
+ if (!length) {
+ return [];
+ }
+ n = (guard || n === undefined) ? 1 : toInteger(n);
+ n = length - n;
+ return baseSlice(array, n < 0 ? 0 : n, length);
+ }
+
+ /**
+ * Creates a slice of `array` with elements taken from the end. Elements are
+ * taken until `predicate` returns falsey. The predicate is invoked with
+ * three arguments: (value, index, array).
+ *
+ * @static
+ * @memberOf _
+ * @since 3.0.0
+ * @category Array
+ * @param {Array} array The array to query.
+ * @param {Function} [predicate=_.identity] The function invoked per iteration.
+ * @returns {Array} Returns the slice of `array`.
+ * @example
+ *
+ * var users = [
+ * { 'user': 'barney', 'active': true },
+ * { 'user': 'fred', 'active': false },
+ * { 'user': 'pebbles', 'active': false }
+ * ];
+ *
+ * _.takeRightWhile(users, function(o) { return !o.active; });
+ * // => objects for ['fred', 'pebbles']
+ *
+ * // The `_.matches` iteratee shorthand.
+ * _.takeRightWhile(users, { 'user': 'pebbles', 'active': false });
+ * // => objects for ['pebbles']
+ *
+ * // The `_.matchesProperty` iteratee shorthand.
+ * _.takeRightWhile(users, ['active', false]);
+ * // => objects for ['fred', 'pebbles']
+ *
+ * // The `_.property` iteratee shorthand.
+ * _.takeRightWhile(users, 'active');
+ * // => []
+ */
+ function takeRightWhile(array, predicate) {
+ return (array && array.length)
+ ? baseWhile(array, getIteratee(predicate, 3), false, true)
+ : [];
+ }
+
+ /**
+ * Creates a slice of `array` with elements taken from the beginning. Elements
+ * are taken until `predicate` returns falsey. The predicate is invoked with
+ * three arguments: (value, index, array).
+ *
+ * @static
+ * @memberOf _
+ * @since 3.0.0
+ * @category Array
+ * @param {Array} array The array to query.
+ * @param {Function} [predicate=_.identity] The function invoked per iteration.
+ * @returns {Array} Returns the slice of `array`.
+ * @example
+ *
+ * var users = [
+ * { 'user': 'barney', 'active': false },
+ * { 'user': 'fred', 'active': false },
+ * { 'user': 'pebbles', 'active': true }
+ * ];
+ *
+ * _.takeWhile(users, function(o) { return !o.active; });
+ * // => objects for ['barney', 'fred']
+ *
+ * // The `_.matches` iteratee shorthand.
+ * _.takeWhile(users, { 'user': 'barney', 'active': false });
+ * // => objects for ['barney']
+ *
+ * // The `_.matchesProperty` iteratee shorthand.
+ * _.takeWhile(users, ['active', false]);
+ * // => objects for ['barney', 'fred']
+ *
+ * // The `_.property` iteratee shorthand.
+ * _.takeWhile(users, 'active');
+ * // => []
+ */
+ function takeWhile(array, predicate) {
+ return (array && array.length)
+ ? baseWhile(array, getIteratee(predicate, 3))
+ : [];
+ }
+
+ /**
+ * Creates an array of unique values, in order, from all given arrays using
+ * [`SameValueZero`](http://ecma-international.org/ecma-262/7.0/#sec-samevaluezero)
+ * for equality comparisons.
+ *
+ * @static
+ * @memberOf _
+ * @since 0.1.0
+ * @category Array
+ * @param {...Array} [arrays] The arrays to inspect.
+ * @returns {Array} Returns the new array of combined values.
+ * @example
+ *
+ * _.union([2], [1, 2]);
+ * // => [2, 1]
+ */
+ var union = baseRest(function(arrays) {
+ return baseUniq(baseFlatten(arrays, 1, isArrayLikeObject, true));
+ });
+
+ /**
+ * This method is like `_.union` except that it accepts `iteratee` which is
+ * invoked for each element of each `arrays` to generate the criterion by
+ * which uniqueness is computed. Result values are chosen from the first
+ * array in which the value occurs. The iteratee is invoked with one argument:
+ * (value).
+ *
+ * @static
+ * @memberOf _
+ * @since 4.0.0
+ * @category Array
+ * @param {...Array} [arrays] The arrays to inspect.
+ * @param {Function} [iteratee=_.identity] The iteratee invoked per element.
+ * @returns {Array} Returns the new array of combined values.
+ * @example
+ *
+ * _.unionBy([2.1], [1.2, 2.3], Math.floor);
+ * // => [2.1, 1.2]
+ *
+ * // The `_.property` iteratee shorthand.
+ * _.unionBy([{ 'x': 1 }], [{ 'x': 2 }, { 'x': 1 }], 'x');
+ * // => [{ 'x': 1 }, { 'x': 2 }]
+ */
+ var unionBy = baseRest(function(arrays) {
+ var iteratee = last(arrays);
+ if (isArrayLikeObject(iteratee)) {
+ iteratee = undefined;
+ }
+ return baseUniq(baseFlatten(arrays, 1, isArrayLikeObject, true), getIteratee(iteratee, 2));
+ });
+
+ /**
+ * This method is like `_.union` except that it accepts `comparator` which
+ * is invoked to compare elements of `arrays`. Result values are chosen from
+ * the first array in which the value occurs. The comparator is invoked
+ * with two arguments: (arrVal, othVal).
+ *
+ * @static
+ * @memberOf _
+ * @since 4.0.0
+ * @category Array
+ * @param {...Array} [arrays] The arrays to inspect.
+ * @param {Function} [comparator] The comparator invoked per element.
+ * @returns {Array} Returns the new array of combined values.
+ * @example
+ *
+ * var objects = [{ 'x': 1, 'y': 2 }, { 'x': 2, 'y': 1 }];
+ * var others = [{ 'x': 1, 'y': 1 }, { 'x': 1, 'y': 2 }];
+ *
+ * _.unionWith(objects, others, _.isEqual);
+ * // => [{ 'x': 1, 'y': 2 }, { 'x': 2, 'y': 1 }, { 'x': 1, 'y': 1 }]
+ */
+ var unionWith = baseRest(function(arrays) {
+ var comparator = last(arrays);
+ comparator = typeof comparator == 'function' ? comparator : undefined;
+ return baseUniq(baseFlatten(arrays, 1, isArrayLikeObject, true), undefined, comparator);
+ });
+
+ /**
+ * Creates a duplicate-free version of an array, using
+ * [`SameValueZero`](http://ecma-international.org/ecma-262/7.0/#sec-samevaluezero)
+ * for equality comparisons, in which only the first occurrence of each element
+ * is kept. The order of result values is determined by the order they occur
+ * in the array.
+ *
+ * @static
+ * @memberOf _
+ * @since 0.1.0
+ * @category Array
+ * @param {Array} array The array to inspect.
+ * @returns {Array} Returns the new duplicate free array.
+ * @example
+ *
+ * _.uniq([2, 1, 2]);
+ * // => [2, 1]
+ */
+ function uniq(array) {
+ return (array && array.length) ? baseUniq(array) : [];
+ }
+
+ /**
+ * This method is like `_.uniq` except that it accepts `iteratee` which is
+ * invoked for each element in `array` to generate the criterion by which
+ * uniqueness is computed. The order of result values is determined by the
+ * order they occur in the array. The iteratee is invoked with one argument:
+ * (value).
+ *
+ * @static
+ * @memberOf _
+ * @since 4.0.0
+ * @category Array
+ * @param {Array} array The array to inspect.
+ * @param {Function} [iteratee=_.identity] The iteratee invoked per element.
+ * @returns {Array} Returns the new duplicate free array.
+ * @example
+ *
+ * _.uniqBy([2.1, 1.2, 2.3], Math.floor);
+ * // => [2.1, 1.2]
+ *
+ * // The `_.property` iteratee shorthand.
+ * _.uniqBy([{ 'x': 1 }, { 'x': 2 }, { 'x': 1 }], 'x');
+ * // => [{ 'x': 1 }, { 'x': 2 }]
+ */
+ function uniqBy(array, iteratee) {
+ return (array && array.length) ? baseUniq(array, getIteratee(iteratee, 2)) : [];
+ }
+
+ /**
+ * This method is like `_.uniq` except that it accepts `comparator` which
+ * is invoked to compare elements of `array`. The order of result values is
+ * determined by the order they occur in the array.The comparator is invoked
+ * with two arguments: (arrVal, othVal).
+ *
+ * @static
+ * @memberOf _
+ * @since 4.0.0
+ * @category Array
+ * @param {Array} array The array to inspect.
+ * @param {Function} [comparator] The comparator invoked per element.
+ * @returns {Array} Returns the new duplicate free array.
+ * @example
+ *
+ * var objects = [{ 'x': 1, 'y': 2 }, { 'x': 2, 'y': 1 }, { 'x': 1, 'y': 2 }];
+ *
+ * _.uniqWith(objects, _.isEqual);
+ * // => [{ 'x': 1, 'y': 2 }, { 'x': 2, 'y': 1 }]
+ */
+ function uniqWith(array, comparator) {
+ comparator = typeof comparator == 'function' ? comparator : undefined;
+ return (array && array.length) ? baseUniq(array, undefined, comparator) : [];
+ }
+
+ /**
+ * This method is like `_.zip` except that it accepts an array of grouped
+ * elements and creates an array regrouping the elements to their pre-zip
+ * configuration.
+ *
+ * @static
+ * @memberOf _
+ * @since 1.2.0
+ * @category Array
+ * @param {Array} array The array of grouped elements to process.
+ * @returns {Array} Returns the new array of regrouped elements.
+ * @example
+ *
+ * var zipped = _.zip(['a', 'b'], [1, 2], [true, false]);
+ * // => [['a', 1, true], ['b', 2, false]]
+ *
+ * _.unzip(zipped);
+ * // => [['a', 'b'], [1, 2], [true, false]]
+ */
+ function unzip(array) {
+ if (!(array && array.length)) {
+ return [];
+ }
+ var length = 0;
+ array = arrayFilter(array, function(group) {
+ if (isArrayLikeObject(group)) {
+ length = nativeMax(group.length, length);
+ return true;
+ }
+ });
+ return baseTimes(length, function(index) {
+ return arrayMap(array, baseProperty(index));
+ });
+ }
+
+ /**
+ * This method is like `_.unzip` except that it accepts `iteratee` to specify
+ * how regrouped values should be combined. The iteratee is invoked with the
+ * elements of each group: (...group).
+ *
+ * @static
+ * @memberOf _
+ * @since 3.8.0
+ * @category Array
+ * @param {Array} array The array of grouped elements to process.
+ * @param {Function} [iteratee=_.identity] The function to combine
+ * regrouped values.
+ * @returns {Array} Returns the new array of regrouped elements.
+ * @example
+ *
+ * var zipped = _.zip([1, 2], [10, 20], [100, 200]);
+ * // => [[1, 10, 100], [2, 20, 200]]
+ *
+ * _.unzipWith(zipped, _.add);
+ * // => [3, 30, 300]
+ */
+ function unzipWith(array, iteratee) {
+ if (!(array && array.length)) {
+ return [];
+ }
+ var result = unzip(array);
+ if (iteratee == null) {
+ return result;
+ }
+ return arrayMap(result, function(group) {
+ return apply(iteratee, undefined, group);
+ });
+ }
+
+ /**
+ * Creates an array excluding all given values using
+ * [`SameValueZero`](http://ecma-international.org/ecma-262/7.0/#sec-samevaluezero)
+ * for equality comparisons.
+ *
+ * **Note:** Unlike `_.pull`, this method returns a new array.
+ *
+ * @static
+ * @memberOf _
+ * @since 0.1.0
+ * @category Array
+ * @param {Array} array The array to inspect.
+ * @param {...*} [values] The values to exclude.
+ * @returns {Array} Returns the new array of filtered values.
+ * @see _.difference, _.xor
+ * @example
+ *
+ * _.without([2, 1, 2, 3], 1, 2);
+ * // => [3]
+ */
+ var without = baseRest(function(array, values) {
+ return isArrayLikeObject(array)
+ ? baseDifference(array, values)
+ : [];
+ });
+
+ /**
+ * Creates an array of unique values that is the
+ * [symmetric difference](https://en.wikipedia.org/wiki/Symmetric_difference)
+ * of the given arrays. The order of result values is determined by the order
+ * they occur in the arrays.
+ *
+ * @static
+ * @memberOf _
+ * @since 2.4.0
+ * @category Array
+ * @param {...Array} [arrays] The arrays to inspect.
+ * @returns {Array} Returns the new array of filtered values.
+ * @see _.difference, _.without
+ * @example
+ *
+ * _.xor([2, 1], [2, 3]);
+ * // => [1, 3]
+ */
+ var xor = baseRest(function(arrays) {
+ return baseXor(arrayFilter(arrays, isArrayLikeObject));
+ });
+
+ /**
+ * This method is like `_.xor` except that it accepts `iteratee` which is
+ * invoked for each element of each `arrays` to generate the criterion by
+ * which by which they're compared. The order of result values is determined
+ * by the order they occur in the arrays. The iteratee is invoked with one
+ * argument: (value).
+ *
+ * @static
+ * @memberOf _
+ * @since 4.0.0
+ * @category Array
+ * @param {...Array} [arrays] The arrays to inspect.
+ * @param {Function} [iteratee=_.identity] The iteratee invoked per element.
+ * @returns {Array} Returns the new array of filtered values.
+ * @example
+ *
+ * _.xorBy([2.1, 1.2], [2.3, 3.4], Math.floor);
+ * // => [1.2, 3.4]
+ *
+ * // The `_.property` iteratee shorthand.
+ * _.xorBy([{ 'x': 1 }], [{ 'x': 2 }, { 'x': 1 }], 'x');
+ * // => [{ 'x': 2 }]
+ */
+ var xorBy = baseRest(function(arrays) {
+ var iteratee = last(arrays);
+ if (isArrayLikeObject(iteratee)) {
+ iteratee = undefined;
+ }
+ return baseXor(arrayFilter(arrays, isArrayLikeObject), getIteratee(iteratee, 2));
+ });
+
+ /**
+ * This method is like `_.xor` except that it accepts `comparator` which is
+ * invoked to compare elements of `arrays`. The order of result values is
+ * determined by the order they occur in the arrays. The comparator is invoked
+ * with two arguments: (arrVal, othVal).
+ *
+ * @static
+ * @memberOf _
+ * @since 4.0.0
+ * @category Array
+ * @param {...Array} [arrays] The arrays to inspect.
+ * @param {Function} [comparator] The comparator invoked per element.
+ * @returns {Array} Returns the new array of filtered values.
+ * @example
+ *
+ * var objects = [{ 'x': 1, 'y': 2 }, { 'x': 2, 'y': 1 }];
+ * var others = [{ 'x': 1, 'y': 1 }, { 'x': 1, 'y': 2 }];
+ *
+ * _.xorWith(objects, others, _.isEqual);
+ * // => [{ 'x': 2, 'y': 1 }, { 'x': 1, 'y': 1 }]
+ */
+ var xorWith = baseRest(function(arrays) {
+ var comparator = last(arrays);
+ comparator = typeof comparator == 'function' ? comparator : undefined;
+ return baseXor(arrayFilter(arrays, isArrayLikeObject), undefined, comparator);
+ });
+
+ /**
+ * Creates an array of grouped elements, the first of which contains the
+ * first elements of the given arrays, the second of which contains the
+ * second elements of the given arrays, and so on.
+ *
+ * @static
+ * @memberOf _
+ * @since 0.1.0
+ * @category Array
+ * @param {...Array} [arrays] The arrays to process.
+ * @returns {Array} Returns the new array of grouped elements.
+ * @example
+ *
+ * _.zip(['a', 'b'], [1, 2], [true, false]);
+ * // => [['a', 1, true], ['b', 2, false]]
+ */
+ var zip = baseRest(unzip);
+
+ /**
+ * This method is like `_.fromPairs` except that it accepts two arrays,
+ * one of property identifiers and one of corresponding values.
+ *
+ * @static
+ * @memberOf _
+ * @since 0.4.0
+ * @category Array
+ * @param {Array} [props=[]] The property identifiers.
+ * @param {Array} [values=[]] The property values.
+ * @returns {Object} Returns the new object.
+ * @example
+ *
+ * _.zipObject(['a', 'b'], [1, 2]);
+ * // => { 'a': 1, 'b': 2 }
+ */
+ function zipObject(props, values) {
+ return baseZipObject(props || [], values || [], assignValue);
+ }
+
+ /**
+ * This method is like `_.zipObject` except that it supports property paths.
+ *
+ * @static
+ * @memberOf _
+ * @since 4.1.0
+ * @category Array
+ * @param {Array} [props=[]] The property identifiers.
+ * @param {Array} [values=[]] The property values.
+ * @returns {Object} Returns the new object.
+ * @example
+ *
+ * _.zipObjectDeep(['a.b[0].c', 'a.b[1].d'], [1, 2]);
+ * // => { 'a': { 'b': [{ 'c': 1 }, { 'd': 2 }] } }
+ */
+ function zipObjectDeep(props, values) {
+ return baseZipObject(props || [], values || [], baseSet);
+ }
+
+ /**
+ * This method is like `_.zip` except that it accepts `iteratee` to specify
+ * how grouped values should be combined. The iteratee is invoked with the
+ * elements of each group: (...group).
+ *
+ * @static
+ * @memberOf _
+ * @since 3.8.0
+ * @category Array
+ * @param {...Array} [arrays] The arrays to process.
+ * @param {Function} [iteratee=_.identity] The function to combine
+ * grouped values.
+ * @returns {Array} Returns the new array of grouped elements.
+ * @example
+ *
+ * _.zipWith([1, 2], [10, 20], [100, 200], function(a, b, c) {
+ * return a + b + c;
+ * });
+ * // => [111, 222]
+ */
+ var zipWith = baseRest(function(arrays) {
+ var length = arrays.length,
+ iteratee = length > 1 ? arrays[length - 1] : undefined;
+
+ iteratee = typeof iteratee == 'function' ? (arrays.pop(), iteratee) : undefined;
+ return unzipWith(arrays, iteratee);
+ });
+
+ /*------------------------------------------------------------------------*/
+
+ /**
+ * Creates a `lodash` wrapper instance that wraps `value` with explicit method
+ * chain sequences enabled. The result of such sequences must be unwrapped
+ * with `_#value`.
+ *
+ * @static
+ * @memberOf _
+ * @since 1.3.0
+ * @category Seq
+ * @param {*} value The value to wrap.
+ * @returns {Object} Returns the new `lodash` wrapper instance.
+ * @example
+ *
+ * var users = [
+ * { 'user': 'barney', 'age': 36 },
+ * { 'user': 'fred', 'age': 40 },
+ * { 'user': 'pebbles', 'age': 1 }
+ * ];
+ *
+ * var youngest = _
+ * .chain(users)
+ * .sortBy('age')
+ * .map(function(o) {
+ * return o.user + ' is ' + o.age;
+ * })
+ * .head()
+ * .value();
+ * // => 'pebbles is 1'
+ */
+ function chain(value) {
+ var result = lodash(value);
+ result.__chain__ = true;
+ return result;
+ }
+
+ /**
+ * This method invokes `interceptor` and returns `value`. The interceptor
+ * is invoked with one argument; (value). The purpose of this method is to
+ * "tap into" a method chain sequence in order to modify intermediate results.
+ *
+ * @static
+ * @memberOf _
+ * @since 0.1.0
+ * @category Seq
+ * @param {*} value The value to provide to `interceptor`.
+ * @param {Function} interceptor The function to invoke.
+ * @returns {*} Returns `value`.
+ * @example
+ *
+ * _([1, 2, 3])
+ * .tap(function(array) {
+ * // Mutate input array.
+ * array.pop();
+ * })
+ * .reverse()
+ * .value();
+ * // => [2, 1]
+ */
+ function tap(value, interceptor) {
+ interceptor(value);
+ return value;
+ }
+
+ /**
+ * This method is like `_.tap` except that it returns the result of `interceptor`.
+ * The purpose of this method is to "pass thru" values replacing intermediate
+ * results in a method chain sequence.
+ *
+ * @static
+ * @memberOf _
+ * @since 3.0.0
+ * @category Seq
+ * @param {*} value The value to provide to `interceptor`.
+ * @param {Function} interceptor The function to invoke.
+ * @returns {*} Returns the result of `interceptor`.
+ * @example
+ *
+ * _(' abc ')
+ * .chain()
+ * .trim()
+ * .thru(function(value) {
+ * return [value];
+ * })
+ * .value();
+ * // => ['abc']
+ */
+ function thru(value, interceptor) {
+ return interceptor(value);
+ }
+
+ /**
+ * This method is the wrapper version of `_.at`.
+ *
+ * @name at
+ * @memberOf _
+ * @since 1.0.0
+ * @category Seq
+ * @param {...(string|string[])} [paths] The property paths to pick.
+ * @returns {Object} Returns the new `lodash` wrapper instance.
+ * @example
+ *
+ * var object = { 'a': [{ 'b': { 'c': 3 } }, 4] };
+ *
+ * _(object).at(['a[0].b.c', 'a[1]']).value();
+ * // => [3, 4]
+ */
+ var wrapperAt = flatRest(function(paths) {
+ var length = paths.length,
+ start = length ? paths[0] : 0,
+ value = this.__wrapped__,
+ interceptor = function(object) { return baseAt(object, paths); };
+
+ if (length > 1 || this.__actions__.length ||
+ !(value instanceof LazyWrapper) || !isIndex(start)) {
+ return this.thru(interceptor);
+ }
+ value = value.slice(start, +start + (length ? 1 : 0));
+ value.__actions__.push({
+ 'func': thru,
+ 'args': [interceptor],
+ 'thisArg': undefined
+ });
+ return new LodashWrapper(value, this.__chain__).thru(function(array) {
+ if (length && !array.length) {
+ array.push(undefined);
+ }
+ return array;
+ });
+ });
+
+ /**
+ * Creates a `lodash` wrapper instance with explicit method chain sequences enabled.
+ *
+ * @name chain
+ * @memberOf _
+ * @since 0.1.0
+ * @category Seq
+ * @returns {Object} Returns the new `lodash` wrapper instance.
+ * @example
+ *
+ * var users = [
+ * { 'user': 'barney', 'age': 36 },
+ * { 'user': 'fred', 'age': 40 }
+ * ];
+ *
+ * // A sequence without explicit chaining.
+ * _(users).head();
+ * // => { 'user': 'barney', 'age': 36 }
+ *
+ * // A sequence with explicit chaining.
+ * _(users)
+ * .chain()
+ * .head()
+ * .pick('user')
+ * .value();
+ * // => { 'user': 'barney' }
+ */
+ function wrapperChain() {
+ return chain(this);
+ }
+
+ /**
+ * Executes the chain sequence and returns the wrapped result.
+ *
+ * @name commit
+ * @memberOf _
+ * @since 3.2.0
+ * @category Seq
+ * @returns {Object} Returns the new `lodash` wrapper instance.
+ * @example
+ *
+ * var array = [1, 2];
+ * var wrapped = _(array).push(3);
+ *
+ * console.log(array);
+ * // => [1, 2]
+ *
+ * wrapped = wrapped.commit();
+ * console.log(array);
+ * // => [1, 2, 3]
+ *
+ * wrapped.last();
+ * // => 3
+ *
+ * console.log(array);
+ * // => [1, 2, 3]
+ */
+ function wrapperCommit() {
+ return new LodashWrapper(this.value(), this.__chain__);
+ }
+
+ /**
+ * Gets the next value on a wrapped object following the
+ * [iterator protocol](https://mdn.io/iteration_protocols#iterator).
+ *
+ * @name next
+ * @memberOf _
+ * @since 4.0.0
+ * @category Seq
+ * @returns {Object} Returns the next iterator value.
+ * @example
+ *
+ * var wrapped = _([1, 2]);
+ *
+ * wrapped.next();
+ * // => { 'done': false, 'value': 1 }
+ *
+ * wrapped.next();
+ * // => { 'done': false, 'value': 2 }
+ *
+ * wrapped.next();
+ * // => { 'done': true, 'value': undefined }
+ */
+ function wrapperNext() {
+ if (this.__values__ === undefined) {
+ this.__values__ = toArray(this.value());
+ }
+ var done = this.__index__ >= this.__values__.length,
+ value = done ? undefined : this.__values__[this.__index__++];
+
+ return { 'done': done, 'value': value };
+ }
+
+ /**
+ * Enables the wrapper to be iterable.
+ *
+ * @name Symbol.iterator
+ * @memberOf _
+ * @since 4.0.0
+ * @category Seq
+ * @returns {Object} Returns the wrapper object.
+ * @example
+ *
+ * var wrapped = _([1, 2]);
+ *
+ * wrapped[Symbol.iterator]() === wrapped;
+ * // => true
+ *
+ * Array.from(wrapped);
+ * // => [1, 2]
+ */
+ function wrapperToIterator() {
+ return this;
+ }
+
+ /**
+ * Creates a clone of the chain sequence planting `value` as the wrapped value.
+ *
+ * @name plant
+ * @memberOf _
+ * @since 3.2.0
+ * @category Seq
+ * @param {*} value The value to plant.
+ * @returns {Object} Returns the new `lodash` wrapper instance.
+ * @example
+ *
+ * function square(n) {
+ * return n * n;
+ * }
+ *
+ * var wrapped = _([1, 2]).map(square);
+ * var other = wrapped.plant([3, 4]);
+ *
+ * other.value();
+ * // => [9, 16]
+ *
+ * wrapped.value();
+ * // => [1, 4]
+ */
+ function wrapperPlant(value) {
+ var result,
+ parent = this;
+
+ while (parent instanceof baseLodash) {
+ var clone = wrapperClone(parent);
+ clone.__index__ = 0;
+ clone.__values__ = undefined;
+ if (result) {
+ previous.__wrapped__ = clone;
+ } else {
+ result = clone;
+ }
+ var previous = clone;
+ parent = parent.__wrapped__;
+ }
+ previous.__wrapped__ = value;
+ return result;
+ }
+
+ /**
+ * This method is the wrapper version of `_.reverse`.
+ *
+ * **Note:** This method mutates the wrapped array.
+ *
+ * @name reverse
+ * @memberOf _
+ * @since 0.1.0
+ * @category Seq
+ * @returns {Object} Returns the new `lodash` wrapper instance.
+ * @example
+ *
+ * var array = [1, 2, 3];
+ *
+ * _(array).reverse().value()
+ * // => [3, 2, 1]
+ *
+ * console.log(array);
+ * // => [3, 2, 1]
+ */
+ function wrapperReverse() {
+ var value = this.__wrapped__;
+ if (value instanceof LazyWrapper) {
+ var wrapped = value;
+ if (this.__actions__.length) {
+ wrapped = new LazyWrapper(this);
+ }
+ wrapped = wrapped.reverse();
+ wrapped.__actions__.push({
+ 'func': thru,
+ 'args': [reverse],
+ 'thisArg': undefined
+ });
+ return new LodashWrapper(wrapped, this.__chain__);
+ }
+ return this.thru(reverse);
+ }
+
+ /**
+ * Executes the chain sequence to resolve the unwrapped value.
+ *
+ * @name value
+ * @memberOf _
+ * @since 0.1.0
+ * @alias toJSON, valueOf
+ * @category Seq
+ * @returns {*} Returns the resolved unwrapped value.
+ * @example
+ *
+ * _([1, 2, 3]).value();
+ * // => [1, 2, 3]
+ */
+ function wrapperValue() {
+ return baseWrapperValue(this.__wrapped__, this.__actions__);
+ }
+
+ /*------------------------------------------------------------------------*/
+
+ /**
+ * Creates an object composed of keys generated from the results of running
+ * each element of `collection` thru `iteratee`. The corresponding value of
+ * each key is the number of times the key was returned by `iteratee`. The
+ * iteratee is invoked with one argument: (value).
+ *
+ * @static
+ * @memberOf _
+ * @since 0.5.0
+ * @category Collection
+ * @param {Array|Object} collection The collection to iterate over.
+ * @param {Function} [iteratee=_.identity] The iteratee to transform keys.
+ * @returns {Object} Returns the composed aggregate object.
+ * @example
+ *
+ * _.countBy([6.1, 4.2, 6.3], Math.floor);
+ * // => { '4': 1, '6': 2 }
+ *
+ * // The `_.property` iteratee shorthand.
+ * _.countBy(['one', 'two', 'three'], 'length');
+ * // => { '3': 2, '5': 1 }
+ */
+ var countBy = createAggregator(function(result, value, key) {
+ if (hasOwnProperty.call(result, key)) {
+ ++result[key];
+ } else {
+ baseAssignValue(result, key, 1);
+ }
+ });
+
+ /**
+ * Checks if `predicate` returns truthy for **all** elements of `collection`.
+ * Iteration is stopped once `predicate` returns falsey. The predicate is
+ * invoked with three arguments: (value, index|key, collection).
+ *
+ * **Note:** This method returns `true` for
+ * [empty collections](https://en.wikipedia.org/wiki/Empty_set) because
+ * [everything is true](https://en.wikipedia.org/wiki/Vacuous_truth) of
+ * elements of empty collections.
+ *
+ * @static
+ * @memberOf _
+ * @since 0.1.0
+ * @category Collection
+ * @param {Array|Object} collection The collection to iterate over.
+ * @param {Function} [predicate=_.identity] The function invoked per iteration.
+ * @param- {Object} [guard] Enables use as an iteratee for methods like `_.map`.
+ * @returns {boolean} Returns `true` if all elements pass the predicate check,
+ * else `false`.
+ * @example
+ *
+ * _.every([true, 1, null, 'yes'], Boolean);
+ * // => false
+ *
+ * var users = [
+ * { 'user': 'barney', 'age': 36, 'active': false },
+ * { 'user': 'fred', 'age': 40, 'active': false }
+ * ];
+ *
+ * // The `_.matches` iteratee shorthand.
+ * _.every(users, { 'user': 'barney', 'active': false });
+ * // => false
+ *
+ * // The `_.matchesProperty` iteratee shorthand.
+ * _.every(users, ['active', false]);
+ * // => true
+ *
+ * // The `_.property` iteratee shorthand.
+ * _.every(users, 'active');
+ * // => false
+ */
+ function every(collection, predicate, guard) {
+ var func = isArray(collection) ? arrayEvery : baseEvery;
+ if (guard && isIterateeCall(collection, predicate, guard)) {
+ predicate = undefined;
+ }
+ return func(collection, getIteratee(predicate, 3));
+ }
+
+ /**
+ * Iterates over elements of `collection`, returning an array of all elements
+ * `predicate` returns truthy for. The predicate is invoked with three
+ * arguments: (value, index|key, collection).
+ *
+ * **Note:** Unlike `_.remove`, this method returns a new array.
+ *
+ * @static
+ * @memberOf _
+ * @since 0.1.0
+ * @category Collection
+ * @param {Array|Object} collection The collection to iterate over.
+ * @param {Function} [predicate=_.identity] The function invoked per iteration.
+ * @returns {Array} Returns the new filtered array.
+ * @see _.reject
+ * @example
+ *
+ * var users = [
+ * { 'user': 'barney', 'age': 36, 'active': true },
+ * { 'user': 'fred', 'age': 40, 'active': false }
+ * ];
+ *
+ * _.filter(users, function(o) { return !o.active; });
+ * // => objects for ['fred']
+ *
+ * // The `_.matches` iteratee shorthand.
+ * _.filter(users, { 'age': 36, 'active': true });
+ * // => objects for ['barney']
+ *
+ * // The `_.matchesProperty` iteratee shorthand.
+ * _.filter(users, ['active', false]);
+ * // => objects for ['fred']
+ *
+ * // The `_.property` iteratee shorthand.
+ * _.filter(users, 'active');
+ * // => objects for ['barney']
+ */
+ function filter(collection, predicate) {
+ var func = isArray(collection) ? arrayFilter : baseFilter;
+ return func(collection, getIteratee(predicate, 3));
+ }
+
+ /**
+ * Iterates over elements of `collection`, returning the first element
+ * `predicate` returns truthy for. The predicate is invoked with three
+ * arguments: (value, index|key, collection).
+ *
+ * @static
+ * @memberOf _
+ * @since 0.1.0
+ * @category Collection
+ * @param {Array|Object} collection The collection to inspect.
+ * @param {Function} [predicate=_.identity] The function invoked per iteration.
+ * @param {number} [fromIndex=0] The index to search from.
+ * @returns {*} Returns the matched element, else `undefined`.
+ * @example
+ *
+ * var users = [
+ * { 'user': 'barney', 'age': 36, 'active': true },
+ * { 'user': 'fred', 'age': 40, 'active': false },
+ * { 'user': 'pebbles', 'age': 1, 'active': true }
+ * ];
+ *
+ * _.find(users, function(o) { return o.age < 40; });
+ * // => object for 'barney'
+ *
+ * // The `_.matches` iteratee shorthand.
+ * _.find(users, { 'age': 1, 'active': true });
+ * // => object for 'pebbles'
+ *
+ * // The `_.matchesProperty` iteratee shorthand.
+ * _.find(users, ['active', false]);
+ * // => object for 'fred'
+ *
+ * // The `_.property` iteratee shorthand.
+ * _.find(users, 'active');
+ * // => object for 'barney'
+ */
+ var find = createFind(findIndex);
+
+ /**
+ * This method is like `_.find` except that it iterates over elements of
+ * `collection` from right to left.
+ *
+ * @static
+ * @memberOf _
+ * @since 2.0.0
+ * @category Collection
+ * @param {Array|Object} collection The collection to inspect.
+ * @param {Function} [predicate=_.identity] The function invoked per iteration.
+ * @param {number} [fromIndex=collection.length-1] The index to search from.
+ * @returns {*} Returns the matched element, else `undefined`.
+ * @example
+ *
+ * _.findLast([1, 2, 3, 4], function(n) {
+ * return n % 2 == 1;
+ * });
+ * // => 3
+ */
+ var findLast = createFind(findLastIndex);
+
+ /**
+ * Creates a flattened array of values by running each element in `collection`
+ * thru `iteratee` and flattening the mapped results. The iteratee is invoked
+ * with three arguments: (value, index|key, collection).
+ *
+ * @static
+ * @memberOf _
+ * @since 4.0.0
+ * @category Collection
+ * @param {Array|Object} collection The collection to iterate over.
+ * @param {Function} [iteratee=_.identity] The function invoked per iteration.
+ * @returns {Array} Returns the new flattened array.
+ * @example
+ *
+ * function duplicate(n) {
+ * return [n, n];
+ * }
+ *
+ * _.flatMap([1, 2], duplicate);
+ * // => [1, 1, 2, 2]
+ */
+ function flatMap(collection, iteratee) {
+ return baseFlatten(map(collection, iteratee), 1);
+ }
+
+ /**
+ * This method is like `_.flatMap` except that it recursively flattens the
+ * mapped results.
+ *
+ * @static
+ * @memberOf _
+ * @since 4.7.0
+ * @category Collection
+ * @param {Array|Object} collection The collection to iterate over.
+ * @param {Function} [iteratee=_.identity] The function invoked per iteration.
+ * @returns {Array} Returns the new flattened array.
+ * @example
+ *
+ * function duplicate(n) {
+ * return [[[n, n]]];
+ * }
+ *
+ * _.flatMapDeep([1, 2], duplicate);
+ * // => [1, 1, 2, 2]
+ */
+ function flatMapDeep(collection, iteratee) {
+ return baseFlatten(map(collection, iteratee), INFINITY);
+ }
+
+ /**
+ * This method is like `_.flatMap` except that it recursively flattens the
+ * mapped results up to `depth` times.
+ *
+ * @static
+ * @memberOf _
+ * @since 4.7.0
+ * @category Collection
+ * @param {Array|Object} collection The collection to iterate over.
+ * @param {Function} [iteratee=_.identity] The function invoked per iteration.
+ * @param {number} [depth=1] The maximum recursion depth.
+ * @returns {Array} Returns the new flattened array.
+ * @example
+ *
+ * function duplicate(n) {
+ * return [[[n, n]]];
+ * }
+ *
+ * _.flatMapDepth([1, 2], duplicate, 2);
+ * // => [[1, 1], [2, 2]]
+ */
+ function flatMapDepth(collection, iteratee, depth) {
+ depth = depth === undefined ? 1 : toInteger(depth);
+ return baseFlatten(map(collection, iteratee), depth);
+ }
+
+ /**
+ * Iterates over elements of `collection` and invokes `iteratee` for each element.
+ * The iteratee is invoked with three arguments: (value, index|key, collection).
+ * Iteratee functions may exit iteration early by explicitly returning `false`.
+ *
+ * **Note:** As with other "Collections" methods, objects with a "length"
+ * property are iterated like arrays. To avoid this behavior use `_.forIn`
+ * or `_.forOwn` for object iteration.
+ *
+ * @static
+ * @memberOf _
+ * @since 0.1.0
+ * @alias each
+ * @category Collection
+ * @param {Array|Object} collection The collection to iterate over.
+ * @param {Function} [iteratee=_.identity] The function invoked per iteration.
+ * @returns {Array|Object} Returns `collection`.
+ * @see _.forEachRight
+ * @example
+ *
+ * _.forEach([1, 2], function(value) {
+ * console.log(value);
+ * });
+ * // => Logs `1` then `2`.
+ *
+ * _.forEach({ 'a': 1, 'b': 2 }, function(value, key) {
+ * console.log(key);
+ * });
+ * // => Logs 'a' then 'b' (iteration order is not guaranteed).
+ */
+ function forEach(collection, iteratee) {
+ var func = isArray(collection) ? arrayEach : baseEach;
+ return func(collection, getIteratee(iteratee, 3));
+ }
+
+ /**
+ * This method is like `_.forEach` except that it iterates over elements of
+ * `collection` from right to left.
+ *
+ * @static
+ * @memberOf _
+ * @since 2.0.0
+ * @alias eachRight
+ * @category Collection
+ * @param {Array|Object} collection The collection to iterate over.
+ * @param {Function} [iteratee=_.identity] The function invoked per iteration.
+ * @returns {Array|Object} Returns `collection`.
+ * @see _.forEach
+ * @example
+ *
+ * _.forEachRight([1, 2], function(value) {
+ * console.log(value);
+ * });
+ * // => Logs `2` then `1`.
+ */
+ function forEachRight(collection, iteratee) {
+ var func = isArray(collection) ? arrayEachRight : baseEachRight;
+ return func(collection, getIteratee(iteratee, 3));
+ }
+
+ /**
+ * Creates an object composed of keys generated from the results of running
+ * each element of `collection` thru `iteratee`. The order of grouped values
+ * is determined by the order they occur in `collection`. The corresponding
+ * value of each key is an array of elements responsible for generating the
+ * key. The iteratee is invoked with one argument: (value).
+ *
+ * @static
+ * @memberOf _
+ * @since 0.1.0
+ * @category Collection
+ * @param {Array|Object} collection The collection to iterate over.
+ * @param {Function} [iteratee=_.identity] The iteratee to transform keys.
+ * @returns {Object} Returns the composed aggregate object.
+ * @example
+ *
+ * _.groupBy([6.1, 4.2, 6.3], Math.floor);
+ * // => { '4': [4.2], '6': [6.1, 6.3] }
+ *
+ * // The `_.property` iteratee shorthand.
+ * _.groupBy(['one', 'two', 'three'], 'length');
+ * // => { '3': ['one', 'two'], '5': ['three'] }
+ */
+ var groupBy = createAggregator(function(result, value, key) {
+ if (hasOwnProperty.call(result, key)) {
+ result[key].push(value);
+ } else {
+ baseAssignValue(result, key, [value]);
+ }
+ });
+
+ /**
+ * Checks if `value` is in `collection`. If `collection` is a string, it's
+ * checked for a substring of `value`, otherwise
+ * [`SameValueZero`](http://ecma-international.org/ecma-262/7.0/#sec-samevaluezero)
+ * is used for equality comparisons. If `fromIndex` is negative, it's used as
+ * the offset from the end of `collection`.
+ *
+ * @static
+ * @memberOf _
+ * @since 0.1.0
+ * @category Collection
+ * @param {Array|Object|string} collection The collection to inspect.
+ * @param {*} value The value to search for.
+ * @param {number} [fromIndex=0] The index to search from.
+ * @param- {Object} [guard] Enables use as an iteratee for methods like `_.reduce`.
+ * @returns {boolean} Returns `true` if `value` is found, else `false`.
+ * @example
+ *
+ * _.includes([1, 2, 3], 1);
+ * // => true
+ *
+ * _.includes([1, 2, 3], 1, 2);
+ * // => false
+ *
+ * _.includes({ 'a': 1, 'b': 2 }, 1);
+ * // => true
+ *
+ * _.includes('abcd', 'bc');
+ * // => true
+ */
+ function includes(collection, value, fromIndex, guard) {
+ collection = isArrayLike(collection) ? collection : values(collection);
+ fromIndex = (fromIndex && !guard) ? toInteger(fromIndex) : 0;
+
+ var length = collection.length;
+ if (fromIndex < 0) {
+ fromIndex = nativeMax(length + fromIndex, 0);
+ }
+ return isString(collection)
+ ? (fromIndex <= length && collection.indexOf(value, fromIndex) > -1)
+ : (!!length && baseIndexOf(collection, value, fromIndex) > -1);
+ }
+
+ /**
+ * Invokes the method at `path` of each element in `collection`, returning
+ * an array of the results of each invoked method. Any additional arguments
+ * are provided to each invoked method. If `path` is a function, it's invoked
+ * for, and `this` bound to, each element in `collection`.
+ *
+ * @static
+ * @memberOf _
+ * @since 4.0.0
+ * @category Collection
+ * @param {Array|Object} collection The collection to iterate over.
+ * @param {Array|Function|string} path The path of the method to invoke or
+ * the function invoked per iteration.
+ * @param {...*} [args] The arguments to invoke each method with.
+ * @returns {Array} Returns the array of results.
+ * @example
+ *
+ * _.invokeMap([[5, 1, 7], [3, 2, 1]], 'sort');
+ * // => [[1, 5, 7], [1, 2, 3]]
+ *
+ * _.invokeMap([123, 456], String.prototype.split, '');
+ * // => [['1', '2', '3'], ['4', '5', '6']]
+ */
+ var invokeMap = baseRest(function(collection, path, args) {
+ var index = -1,
+ isFunc = typeof path == 'function',
+ result = isArrayLike(collection) ? Array(collection.length) : [];
+
+ baseEach(collection, function(value) {
+ result[++index] = isFunc ? apply(path, value, args) : baseInvoke(value, path, args);
+ });
+ return result;
+ });
+
+ /**
+ * Creates an object composed of keys generated from the results of running
+ * each element of `collection` thru `iteratee`. The corresponding value of
+ * each key is the last element responsible for generating the key. The
+ * iteratee is invoked with one argument: (value).
+ *
+ * @static
+ * @memberOf _
+ * @since 4.0.0
+ * @category Collection
+ * @param {Array|Object} collection The collection to iterate over.
+ * @param {Function} [iteratee=_.identity] The iteratee to transform keys.
+ * @returns {Object} Returns the composed aggregate object.
+ * @example
+ *
+ * var array = [
+ * { 'dir': 'left', 'code': 97 },
+ * { 'dir': 'right', 'code': 100 }
+ * ];
+ *
+ * _.keyBy(array, function(o) {
+ * return String.fromCharCode(o.code);
+ * });
+ * // => { 'a': { 'dir': 'left', 'code': 97 }, 'd': { 'dir': 'right', 'code': 100 } }
+ *
+ * _.keyBy(array, 'dir');
+ * // => { 'left': { 'dir': 'left', 'code': 97 }, 'right': { 'dir': 'right', 'code': 100 } }
+ */
+ var keyBy = createAggregator(function(result, value, key) {
+ baseAssignValue(result, key, value);
+ });
+
+ /**
+ * Creates an array of values by running each element in `collection` thru
+ * `iteratee`. The iteratee is invoked with three arguments:
+ * (value, index|key, collection).
+ *
+ * Many lodash methods are guarded to work as iteratees for methods like
+ * `_.every`, `_.filter`, `_.map`, `_.mapValues`, `_.reject`, and `_.some`.
+ *
+ * The guarded methods are:
+ * `ary`, `chunk`, `curry`, `curryRight`, `drop`, `dropRight`, `every`,
+ * `fill`, `invert`, `parseInt`, `random`, `range`, `rangeRight`, `repeat`,
+ * `sampleSize`, `slice`, `some`, `sortBy`, `split`, `take`, `takeRight`,
+ * `template`, `trim`, `trimEnd`, `trimStart`, and `words`
+ *
+ * @static
+ * @memberOf _
+ * @since 0.1.0
+ * @category Collection
+ * @param {Array|Object} collection The collection to iterate over.
+ * @param {Function} [iteratee=_.identity] The function invoked per iteration.
+ * @returns {Array} Returns the new mapped array.
+ * @example
+ *
+ * function square(n) {
+ * return n * n;
+ * }
+ *
+ * _.map([4, 8], square);
+ * // => [16, 64]
+ *
+ * _.map({ 'a': 4, 'b': 8 }, square);
+ * // => [16, 64] (iteration order is not guaranteed)
+ *
+ * var users = [
+ * { 'user': 'barney' },
+ * { 'user': 'fred' }
+ * ];
+ *
+ * // The `_.property` iteratee shorthand.
+ * _.map(users, 'user');
+ * // => ['barney', 'fred']
+ */
+ function map(collection, iteratee) {
+ var func = isArray(collection) ? arrayMap : baseMap;
+ return func(collection, getIteratee(iteratee, 3));
+ }
+
+ /**
+ * This method is like `_.sortBy` except that it allows specifying the sort
+ * orders of the iteratees to sort by. If `orders` is unspecified, all values
+ * are sorted in ascending order. Otherwise, specify an order of "desc" for
+ * descending or "asc" for ascending sort order of corresponding values.
+ *
+ * @static
+ * @memberOf _
+ * @since 4.0.0
+ * @category Collection
+ * @param {Array|Object} collection The collection to iterate over.
+ * @param {Array[]|Function[]|Object[]|string[]} [iteratees=[_.identity]]
+ * The iteratees to sort by.
+ * @param {string[]} [orders] The sort orders of `iteratees`.
+ * @param- {Object} [guard] Enables use as an iteratee for methods like `_.reduce`.
+ * @returns {Array} Returns the new sorted array.
+ * @example
+ *
+ * var users = [
+ * { 'user': 'fred', 'age': 48 },
+ * { 'user': 'barney', 'age': 34 },
+ * { 'user': 'fred', 'age': 40 },
+ * { 'user': 'barney', 'age': 36 }
+ * ];
+ *
+ * // Sort by `user` in ascending order and by `age` in descending order.
+ * _.orderBy(users, ['user', 'age'], ['asc', 'desc']);
+ * // => objects for [['barney', 36], ['barney', 34], ['fred', 48], ['fred', 40]]
+ */
+ function orderBy(collection, iteratees, orders, guard) {
+ if (collection == null) {
+ return [];
+ }
+ if (!isArray(iteratees)) {
+ iteratees = iteratees == null ? [] : [iteratees];
+ }
+ orders = guard ? undefined : orders;
+ if (!isArray(orders)) {
+ orders = orders == null ? [] : [orders];
+ }
+ return baseOrderBy(collection, iteratees, orders);
+ }
+
+ /**
+ * Creates an array of elements split into two groups, the first of which
+ * contains elements `predicate` returns truthy for, the second of which
+ * contains elements `predicate` returns falsey for. The predicate is
+ * invoked with one argument: (value).
+ *
+ * @static
+ * @memberOf _
+ * @since 3.0.0
+ * @category Collection
+ * @param {Array|Object} collection The collection to iterate over.
+ * @param {Function} [predicate=_.identity] The function invoked per iteration.
+ * @returns {Array} Returns the array of grouped elements.
+ * @example
+ *
+ * var users = [
+ * { 'user': 'barney', 'age': 36, 'active': false },
+ * { 'user': 'fred', 'age': 40, 'active': true },
+ * { 'user': 'pebbles', 'age': 1, 'active': false }
+ * ];
+ *
+ * _.partition(users, function(o) { return o.active; });
+ * // => objects for [['fred'], ['barney', 'pebbles']]
+ *
+ * // The `_.matches` iteratee shorthand.
+ * _.partition(users, { 'age': 1, 'active': false });
+ * // => objects for [['pebbles'], ['barney', 'fred']]
+ *
+ * // The `_.matchesProperty` iteratee shorthand.
+ * _.partition(users, ['active', false]);
+ * // => objects for [['barney', 'pebbles'], ['fred']]
+ *
+ * // The `_.property` iteratee shorthand.
+ * _.partition(users, 'active');
+ * // => objects for [['fred'], ['barney', 'pebbles']]
+ */
+ var partition = createAggregator(function(result, value, key) {
+ result[key ? 0 : 1].push(value);
+ }, function() { return [[], []]; });
+
+ /**
+ * Reduces `collection` to a value which is the accumulated result of running
+ * each element in `collection` thru `iteratee`, where each successive
+ * invocation is supplied the return value of the previous. If `accumulator`
+ * is not given, the first element of `collection` is used as the initial
+ * value. The iteratee is invoked with four arguments:
+ * (accumulator, value, index|key, collection).
+ *
+ * Many lodash methods are guarded to work as iteratees for methods like
+ * `_.reduce`, `_.reduceRight`, and `_.transform`.
+ *
+ * The guarded methods are:
+ * `assign`, `defaults`, `defaultsDeep`, `includes`, `merge`, `orderBy`,
+ * and `sortBy`
+ *
+ * @static
+ * @memberOf _
+ * @since 0.1.0
+ * @category Collection
+ * @param {Array|Object} collection The collection to iterate over.
+ * @param {Function} [iteratee=_.identity] The function invoked per iteration.
+ * @param {*} [accumulator] The initial value.
+ * @returns {*} Returns the accumulated value.
+ * @see _.reduceRight
+ * @example
+ *
+ * _.reduce([1, 2], function(sum, n) {
+ * return sum + n;
+ * }, 0);
+ * // => 3
+ *
+ * _.reduce({ 'a': 1, 'b': 2, 'c': 1 }, function(result, value, key) {
+ * (result[value] || (result[value] = [])).push(key);
+ * return result;
+ * }, {});
+ * // => { '1': ['a', 'c'], '2': ['b'] } (iteration order is not guaranteed)
+ */
+ function reduce(collection, iteratee, accumulator) {
+ var func = isArray(collection) ? arrayReduce : baseReduce,
+ initAccum = arguments.length < 3;
+
+ return func(collection, getIteratee(iteratee, 4), accumulator, initAccum, baseEach);
+ }
+
+ /**
+ * This method is like `_.reduce` except that it iterates over elements of
+ * `collection` from right to left.
+ *
+ * @static
+ * @memberOf _
+ * @since 0.1.0
+ * @category Collection
+ * @param {Array|Object} collection The collection to iterate over.
+ * @param {Function} [iteratee=_.identity] The function invoked per iteration.
+ * @param {*} [accumulator] The initial value.
+ * @returns {*} Returns the accumulated value.
+ * @see _.reduce
+ * @example
+ *
+ * var array = [[0, 1], [2, 3], [4, 5]];
+ *
+ * _.reduceRight(array, function(flattened, other) {
+ * return flattened.concat(other);
+ * }, []);
+ * // => [4, 5, 2, 3, 0, 1]
+ */
+ function reduceRight(collection, iteratee, accumulator) {
+ var func = isArray(collection) ? arrayReduceRight : baseReduce,
+ initAccum = arguments.length < 3;
+
+ return func(collection, getIteratee(iteratee, 4), accumulator, initAccum, baseEachRight);
+ }
+
+ /**
+ * The opposite of `_.filter`; this method returns the elements of `collection`
+ * that `predicate` does **not** return truthy for.
+ *
+ * @static
+ * @memberOf _
+ * @since 0.1.0
+ * @category Collection
+ * @param {Array|Object} collection The collection to iterate over.
+ * @param {Function} [predicate=_.identity] The function invoked per iteration.
+ * @returns {Array} Returns the new filtered array.
+ * @see _.filter
+ * @example
+ *
+ * var users = [
+ * { 'user': 'barney', 'age': 36, 'active': false },
+ * { 'user': 'fred', 'age': 40, 'active': true }
+ * ];
+ *
+ * _.reject(users, function(o) { return !o.active; });
+ * // => objects for ['fred']
+ *
+ * // The `_.matches` iteratee shorthand.
+ * _.reject(users, { 'age': 40, 'active': true });
+ * // => objects for ['barney']
+ *
+ * // The `_.matchesProperty` iteratee shorthand.
+ * _.reject(users, ['active', false]);
+ * // => objects for ['fred']
+ *
+ * // The `_.property` iteratee shorthand.
+ * _.reject(users, 'active');
+ * // => objects for ['barney']
+ */
+ function reject(collection, predicate) {
+ var func = isArray(collection) ? arrayFilter : baseFilter;
+ return func(collection, negate(getIteratee(predicate, 3)));
+ }
+
+ /**
+ * Gets a random element from `collection`.
+ *
+ * @static
+ * @memberOf _
+ * @since 2.0.0
+ * @category Collection
+ * @param {Array|Object} collection The collection to sample.
+ * @returns {*} Returns the random element.
+ * @example
+ *
+ * _.sample([1, 2, 3, 4]);
+ * // => 2
+ */
+ function sample(collection) {
+ var func = isArray(collection) ? arraySample : baseSample;
+ return func(collection);
+ }
+
+ /**
+ * Gets `n` random elements at unique keys from `collection` up to the
+ * size of `collection`.
+ *
+ * @static
+ * @memberOf _
+ * @since 4.0.0
+ * @category Collection
+ * @param {Array|Object} collection The collection to sample.
+ * @param {number} [n=1] The number of elements to sample.
+ * @param- {Object} [guard] Enables use as an iteratee for methods like `_.map`.
+ * @returns {Array} Returns the random elements.
+ * @example
+ *
+ * _.sampleSize([1, 2, 3], 2);
+ * // => [3, 1]
+ *
+ * _.sampleSize([1, 2, 3], 4);
+ * // => [2, 3, 1]
+ */
+ function sampleSize(collection, n, guard) {
+ if ((guard ? isIterateeCall(collection, n, guard) : n === undefined)) {
+ n = 1;
+ } else {
+ n = toInteger(n);
+ }
+ var func = isArray(collection) ? arraySampleSize : baseSampleSize;
+ return func(collection, n);
+ }
+
+ /**
+ * Creates an array of shuffled values, using a version of the
+ * [Fisher-Yates shuffle](https://en.wikipedia.org/wiki/Fisher-Yates_shuffle).
+ *
+ * @static
+ * @memberOf _
+ * @since 0.1.0
+ * @category Collection
+ * @param {Array|Object} collection The collection to shuffle.
+ * @returns {Array} Returns the new shuffled array.
+ * @example
+ *
+ * _.shuffle([1, 2, 3, 4]);
+ * // => [4, 1, 3, 2]
+ */
+ function shuffle(collection) {
+ var func = isArray(collection) ? arrayShuffle : baseShuffle;
+ return func(collection);
+ }
+
+ /**
+ * Gets the size of `collection` by returning its length for array-like
+ * values or the number of own enumerable string keyed properties for objects.
+ *
+ * @static
+ * @memberOf _
+ * @since 0.1.0
+ * @category Collection
+ * @param {Array|Object|string} collection The collection to inspect.
+ * @returns {number} Returns the collection size.
+ * @example
+ *
+ * _.size([1, 2, 3]);
+ * // => 3
+ *
+ * _.size({ 'a': 1, 'b': 2 });
+ * // => 2
+ *
+ * _.size('pebbles');
+ * // => 7
+ */
+ function size(collection) {
+ if (collection == null) {
+ return 0;
+ }
+ if (isArrayLike(collection)) {
+ return isString(collection) ? stringSize(collection) : collection.length;
+ }
+ var tag = getTag(collection);
+ if (tag == mapTag || tag == setTag) {
+ return collection.size;
+ }
+ return baseKeys(collection).length;
+ }
+
+ /**
+ * Checks if `predicate` returns truthy for **any** element of `collection`.
+ * Iteration is stopped once `predicate` returns truthy. The predicate is
+ * invoked with three arguments: (value, index|key, collection).
+ *
+ * @static
+ * @memberOf _
+ * @since 0.1.0
+ * @category Collection
+ * @param {Array|Object} collection The collection to iterate over.
+ * @param {Function} [predicate=_.identity] The function invoked per iteration.
+ * @param- {Object} [guard] Enables use as an iteratee for methods like `_.map`.
+ * @returns {boolean} Returns `true` if any element passes the predicate check,
+ * else `false`.
+ * @example
+ *
+ * _.some([null, 0, 'yes', false], Boolean);
+ * // => true
+ *
+ * var users = [
+ * { 'user': 'barney', 'active': true },
+ * { 'user': 'fred', 'active': false }
+ * ];
+ *
+ * // The `_.matches` iteratee shorthand.
+ * _.some(users, { 'user': 'barney', 'active': false });
+ * // => false
+ *
+ * // The `_.matchesProperty` iteratee shorthand.
+ * _.some(users, ['active', false]);
+ * // => true
+ *
+ * // The `_.property` iteratee shorthand.
+ * _.some(users, 'active');
+ * // => true
+ */
+ function some(collection, predicate, guard) {
+ var func = isArray(collection) ? arraySome : baseSome;
+ if (guard && isIterateeCall(collection, predicate, guard)) {
+ predicate = undefined;
+ }
+ return func(collection, getIteratee(predicate, 3));
+ }
+
+ /**
+ * Creates an array of elements, sorted in ascending order by the results of
+ * running each element in a collection thru each iteratee. This method
+ * performs a stable sort, that is, it preserves the original sort order of
+ * equal elements. The iteratees are invoked with one argument: (value).
+ *
+ * @static
+ * @memberOf _
+ * @since 0.1.0
+ * @category Collection
+ * @param {Array|Object} collection The collection to iterate over.
+ * @param {...(Function|Function[])} [iteratees=[_.identity]]
+ * The iteratees to sort by.
+ * @returns {Array} Returns the new sorted array.
+ * @example
+ *
+ * var users = [
+ * { 'user': 'fred', 'age': 48 },
+ * { 'user': 'barney', 'age': 36 },
+ * { 'user': 'fred', 'age': 40 },
+ * { 'user': 'barney', 'age': 34 }
+ * ];
+ *
+ * _.sortBy(users, [function(o) { return o.user; }]);
+ * // => objects for [['barney', 36], ['barney', 34], ['fred', 48], ['fred', 40]]
+ *
+ * _.sortBy(users, ['user', 'age']);
+ * // => objects for [['barney', 34], ['barney', 36], ['fred', 40], ['fred', 48]]
+ */
+ var sortBy = baseRest(function(collection, iteratees) {
+ if (collection == null) {
+ return [];
+ }
+ var length = iteratees.length;
+ if (length > 1 && isIterateeCall(collection, iteratees[0], iteratees[1])) {
+ iteratees = [];
+ } else if (length > 2 && isIterateeCall(iteratees[0], iteratees[1], iteratees[2])) {
+ iteratees = [iteratees[0]];
+ }
+ return baseOrderBy(collection, baseFlatten(iteratees, 1), []);
+ });
+
+ /*------------------------------------------------------------------------*/
+
+ /**
+ * Gets the timestamp of the number of milliseconds that have elapsed since
+ * the Unix epoch (1 January 1970 00:00:00 UTC).
+ *
+ * @static
+ * @memberOf _
+ * @since 2.4.0
+ * @category Date
+ * @returns {number} Returns the timestamp.
+ * @example
+ *
+ * _.defer(function(stamp) {
+ * console.log(_.now() - stamp);
+ * }, _.now());
+ * // => Logs the number of milliseconds it took for the deferred invocation.
+ */
+ var now = ctxNow || function() {
+ return root.Date.now();
+ };
+
+ /*------------------------------------------------------------------------*/
+
+ /**
+ * The opposite of `_.before`; this method creates a function that invokes
+ * `func` once it's called `n` or more times.
+ *
+ * @static
+ * @memberOf _
+ * @since 0.1.0
+ * @category Function
+ * @param {number} n The number of calls before `func` is invoked.
+ * @param {Function} func The function to restrict.
+ * @returns {Function} Returns the new restricted function.
+ * @example
+ *
+ * var saves = ['profile', 'settings'];
+ *
+ * var done = _.after(saves.length, function() {
+ * console.log('done saving!');
+ * });
+ *
+ * _.forEach(saves, function(type) {
+ * asyncSave({ 'type': type, 'complete': done });
+ * });
+ * // => Logs 'done saving!' after the two async saves have completed.
+ */
+ function after(n, func) {
+ if (typeof func != 'function') {
+ throw new TypeError(FUNC_ERROR_TEXT);
+ }
+ n = toInteger(n);
+ return function() {
+ if (--n < 1) {
+ return func.apply(this, arguments);
+ }
+ };
+ }
+
+ /**
+ * Creates a function that invokes `func`, with up to `n` arguments,
+ * ignoring any additional arguments.
+ *
+ * @static
+ * @memberOf _
+ * @since 3.0.0
+ * @category Function
+ * @param {Function} func The function to cap arguments for.
+ * @param {number} [n=func.length] The arity cap.
+ * @param- {Object} [guard] Enables use as an iteratee for methods like `_.map`.
+ * @returns {Function} Returns the new capped function.
+ * @example
+ *
+ * _.map(['6', '8', '10'], _.ary(parseInt, 1));
+ * // => [6, 8, 10]
+ */
+ function ary(func, n, guard) {
+ n = guard ? undefined : n;
+ n = (func && n == null) ? func.length : n;
+ return createWrap(func, WRAP_ARY_FLAG, undefined, undefined, undefined, undefined, n);
+ }
+
+ /**
+ * Creates a function that invokes `func`, with the `this` binding and arguments
+ * of the created function, while it's called less than `n` times. Subsequent
+ * calls to the created function return the result of the last `func` invocation.
+ *
+ * @static
+ * @memberOf _
+ * @since 3.0.0
+ * @category Function
+ * @param {number} n The number of calls at which `func` is no longer invoked.
+ * @param {Function} func The function to restrict.
+ * @returns {Function} Returns the new restricted function.
+ * @example
+ *
+ * jQuery(element).on('click', _.before(5, addContactToList));
+ * // => Allows adding up to 4 contacts to the list.
+ */
+ function before(n, func) {
+ var result;
+ if (typeof func != 'function') {
+ throw new TypeError(FUNC_ERROR_TEXT);
+ }
+ n = toInteger(n);
+ return function() {
+ if (--n > 0) {
+ result = func.apply(this, arguments);
+ }
+ if (n <= 1) {
+ func = undefined;
+ }
+ return result;
+ };
+ }
+
+ /**
+ * Creates a function that invokes `func` with the `this` binding of `thisArg`
+ * and `partials` prepended to the arguments it receives.
+ *
+ * The `_.bind.placeholder` value, which defaults to `_` in monolithic builds,
+ * may be used as a placeholder for partially applied arguments.
+ *
+ * **Note:** Unlike native `Function#bind`, this method doesn't set the "length"
+ * property of bound functions.
+ *
+ * @static
+ * @memberOf _
+ * @since 0.1.0
+ * @category Function
+ * @param {Function} func The function to bind.
+ * @param {*} thisArg The `this` binding of `func`.
+ * @param {...*} [partials] The arguments to be partially applied.
+ * @returns {Function} Returns the new bound function.
+ * @example
+ *
+ * function greet(greeting, punctuation) {
+ * return greeting + ' ' + this.user + punctuation;
+ * }
+ *
+ * var object = { 'user': 'fred' };
+ *
+ * var bound = _.bind(greet, object, 'hi');
+ * bound('!');
+ * // => 'hi fred!'
+ *
+ * // Bound with placeholders.
+ * var bound = _.bind(greet, object, _, '!');
+ * bound('hi');
+ * // => 'hi fred!'
+ */
+ var bind = baseRest(function(func, thisArg, partials) {
+ var bitmask = WRAP_BIND_FLAG;
+ if (partials.length) {
+ var holders = replaceHolders(partials, getHolder(bind));
+ bitmask |= WRAP_PARTIAL_FLAG;
+ }
+ return createWrap(func, bitmask, thisArg, partials, holders);
+ });
+
+ /**
+ * Creates a function that invokes the method at `object[key]` with `partials`
+ * prepended to the arguments it receives.
+ *
+ * This method differs from `_.bind` by allowing bound functions to reference
+ * methods that may be redefined or don't yet exist. See
+ * [Peter Michaux's article](http://peter.michaux.ca/articles/lazy-function-definition-pattern)
+ * for more details.
+ *
+ * The `_.bindKey.placeholder` value, which defaults to `_` in monolithic
+ * builds, may be used as a placeholder for partially applied arguments.
+ *
+ * @static
+ * @memberOf _
+ * @since 0.10.0
+ * @category Function
+ * @param {Object} object The object to invoke the method on.
+ * @param {string} key The key of the method.
+ * @param {...*} [partials] The arguments to be partially applied.
+ * @returns {Function} Returns the new bound function.
+ * @example
+ *
+ * var object = {
+ * 'user': 'fred',
+ * 'greet': function(greeting, punctuation) {
+ * return greeting + ' ' + this.user + punctuation;
+ * }
+ * };
+ *
+ * var bound = _.bindKey(object, 'greet', 'hi');
+ * bound('!');
+ * // => 'hi fred!'
+ *
+ * object.greet = function(greeting, punctuation) {
+ * return greeting + 'ya ' + this.user + punctuation;
+ * };
+ *
+ * bound('!');
+ * // => 'hiya fred!'
+ *
+ * // Bound with placeholders.
+ * var bound = _.bindKey(object, 'greet', _, '!');
+ * bound('hi');
+ * // => 'hiya fred!'
+ */
+ var bindKey = baseRest(function(object, key, partials) {
+ var bitmask = WRAP_BIND_FLAG | WRAP_BIND_KEY_FLAG;
+ if (partials.length) {
+ var holders = replaceHolders(partials, getHolder(bindKey));
+ bitmask |= WRAP_PARTIAL_FLAG;
+ }
+ return createWrap(key, bitmask, object, partials, holders);
+ });
+
+ /**
+ * Creates a function that accepts arguments of `func` and either invokes
+ * `func` returning its result, if at least `arity` number of arguments have
+ * been provided, or returns a function that accepts the remaining `func`
+ * arguments, and so on. The arity of `func` may be specified if `func.length`
+ * is not sufficient.
+ *
+ * The `_.curry.placeholder` value, which defaults to `_` in monolithic builds,
+ * may be used as a placeholder for provided arguments.
+ *
+ * **Note:** This method doesn't set the "length" property of curried functions.
+ *
+ * @static
+ * @memberOf _
+ * @since 2.0.0
+ * @category Function
+ * @param {Function} func The function to curry.
+ * @param {number} [arity=func.length] The arity of `func`.
+ * @param- {Object} [guard] Enables use as an iteratee for methods like `_.map`.
+ * @returns {Function} Returns the new curried function.
+ * @example
+ *
+ * var abc = function(a, b, c) {
+ * return [a, b, c];
+ * };
+ *
+ * var curried = _.curry(abc);
+ *
+ * curried(1)(2)(3);
+ * // => [1, 2, 3]
+ *
+ * curried(1, 2)(3);
+ * // => [1, 2, 3]
+ *
+ * curried(1, 2, 3);
+ * // => [1, 2, 3]
+ *
+ * // Curried with placeholders.
+ * curried(1)(_, 3)(2);
+ * // => [1, 2, 3]
+ */
+ function curry(func, arity, guard) {
+ arity = guard ? undefined : arity;
+ var result = createWrap(func, WRAP_CURRY_FLAG, undefined, undefined, undefined, undefined, undefined, arity);
+ result.placeholder = curry.placeholder;
+ return result;
+ }
+
+ /**
+ * This method is like `_.curry` except that arguments are applied to `func`
+ * in the manner of `_.partialRight` instead of `_.partial`.
+ *
+ * The `_.curryRight.placeholder` value, which defaults to `_` in monolithic
+ * builds, may be used as a placeholder for provided arguments.
+ *
+ * **Note:** This method doesn't set the "length" property of curried functions.
+ *
+ * @static
+ * @memberOf _
+ * @since 3.0.0
+ * @category Function
+ * @param {Function} func The function to curry.
+ * @param {number} [arity=func.length] The arity of `func`.
+ * @param- {Object} [guard] Enables use as an iteratee for methods like `_.map`.
+ * @returns {Function} Returns the new curried function.
+ * @example
+ *
+ * var abc = function(a, b, c) {
+ * return [a, b, c];
+ * };
+ *
+ * var curried = _.curryRight(abc);
+ *
+ * curried(3)(2)(1);
+ * // => [1, 2, 3]
+ *
+ * curried(2, 3)(1);
+ * // => [1, 2, 3]
+ *
+ * curried(1, 2, 3);
+ * // => [1, 2, 3]
+ *
+ * // Curried with placeholders.
+ * curried(3)(1, _)(2);
+ * // => [1, 2, 3]
+ */
+ function curryRight(func, arity, guard) {
+ arity = guard ? undefined : arity;
+ var result = createWrap(func, WRAP_CURRY_RIGHT_FLAG, undefined, undefined, undefined, undefined, undefined, arity);
+ result.placeholder = curryRight.placeholder;
+ return result;
+ }
+
+ /**
+ * Creates a debounced function that delays invoking `func` until after `wait`
+ * milliseconds have elapsed since the last time the debounced function was
+ * invoked. The debounced function comes with a `cancel` method to cancel
+ * delayed `func` invocations and a `flush` method to immediately invoke them.
+ * Provide `options` to indicate whether `func` should be invoked on the
+ * leading and/or trailing edge of the `wait` timeout. The `func` is invoked
+ * with the last arguments provided to the debounced function. Subsequent
+ * calls to the debounced function return the result of the last `func`
+ * invocation.
+ *
+ * **Note:** If `leading` and `trailing` options are `true`, `func` is
+ * invoked on the trailing edge of the timeout only if the debounced function
+ * is invoked more than once during the `wait` timeout.
+ *
+ * If `wait` is `0` and `leading` is `false`, `func` invocation is deferred
+ * until to the next tick, similar to `setTimeout` with a timeout of `0`.
+ *
+ * See [David Corbacho's article](https://css-tricks.com/debouncing-throttling-explained-examples/)
+ * for details over the differences between `_.debounce` and `_.throttle`.
+ *
+ * @static
+ * @memberOf _
+ * @since 0.1.0
+ * @category Function
+ * @param {Function} func The function to debounce.
+ * @param {number} [wait=0] The number of milliseconds to delay.
+ * @param {Object} [options={}] The options object.
+ * @param {boolean} [options.leading=false]
+ * Specify invoking on the leading edge of the timeout.
+ * @param {number} [options.maxWait]
+ * The maximum time `func` is allowed to be delayed before it's invoked.
+ * @param {boolean} [options.trailing=true]
+ * Specify invoking on the trailing edge of the timeout.
+ * @returns {Function} Returns the new debounced function.
+ * @example
+ *
+ * // Avoid costly calculations while the window size is in flux.
+ * jQuery(window).on('resize', _.debounce(calculateLayout, 150));
+ *
+ * // Invoke `sendMail` when clicked, debouncing subsequent calls.
+ * jQuery(element).on('click', _.debounce(sendMail, 300, {
+ * 'leading': true,
+ * 'trailing': false
+ * }));
+ *
+ * // Ensure `batchLog` is invoked once after 1 second of debounced calls.
+ * var debounced = _.debounce(batchLog, 250, { 'maxWait': 1000 });
+ * var source = new EventSource('/stream');
+ * jQuery(source).on('message', debounced);
+ *
+ * // Cancel the trailing debounced invocation.
+ * jQuery(window).on('popstate', debounced.cancel);
+ */
+ function debounce(func, wait, options) {
+ var lastArgs,
+ lastThis,
+ maxWait,
+ result,
+ timerId,
+ lastCallTime,
+ lastInvokeTime = 0,
+ leading = false,
+ maxing = false,
+ trailing = true;
+
+ if (typeof func != 'function') {
+ throw new TypeError(FUNC_ERROR_TEXT);
+ }
+ wait = toNumber(wait) || 0;
+ if (isObject(options)) {
+ leading = !!options.leading;
+ maxing = 'maxWait' in options;
+ maxWait = maxing ? nativeMax(toNumber(options.maxWait) || 0, wait) : maxWait;
+ trailing = 'trailing' in options ? !!options.trailing : trailing;
+ }
+
+ function invokeFunc(time) {
+ var args = lastArgs,
+ thisArg = lastThis;
+
+ lastArgs = lastThis = undefined;
+ lastInvokeTime = time;
+ result = func.apply(thisArg, args);
+ return result;
+ }
+
+ function leadingEdge(time) {
+ // Reset any `maxWait` timer.
+ lastInvokeTime = time;
+ // Start the timer for the trailing edge.
+ timerId = setTimeout(timerExpired, wait);
+ // Invoke the leading edge.
+ return leading ? invokeFunc(time) : result;
+ }
+
+ function remainingWait(time) {
+ var timeSinceLastCall = time - lastCallTime,
+ timeSinceLastInvoke = time - lastInvokeTime,
+ result = wait - timeSinceLastCall;
+
+ return maxing ? nativeMin(result, maxWait - timeSinceLastInvoke) : result;
+ }
+
+ function shouldInvoke(time) {
+ var timeSinceLastCall = time - lastCallTime,
+ timeSinceLastInvoke = time - lastInvokeTime;
+
+ // Either this is the first call, activity has stopped and we're at the
+ // trailing edge, the system time has gone backwards and we're treating
+ // it as the trailing edge, or we've hit the `maxWait` limit.
+ return (lastCallTime === undefined || (timeSinceLastCall >= wait) ||
+ (timeSinceLastCall < 0) || (maxing && timeSinceLastInvoke >= maxWait));
+ }
+
+ function timerExpired() {
+ var time = now();
+ if (shouldInvoke(time)) {
+ return trailingEdge(time);
+ }
+ // Restart the timer.
+ timerId = setTimeout(timerExpired, remainingWait(time));
+ }
+
+ function trailingEdge(time) {
+ timerId = undefined;
+
+ // Only invoke if we have `lastArgs` which means `func` has been
+ // debounced at least once.
+ if (trailing && lastArgs) {
+ return invokeFunc(time);
+ }
+ lastArgs = lastThis = undefined;
+ return result;
+ }
+
+ function cancel() {
+ if (timerId !== undefined) {
+ clearTimeout(timerId);
+ }
+ lastInvokeTime = 0;
+ lastArgs = lastCallTime = lastThis = timerId = undefined;
+ }
+
+ function flush() {
+ return timerId === undefined ? result : trailingEdge(now());
+ }
+
+ function debounced() {
+ var time = now(),
+ isInvoking = shouldInvoke(time);
+
+ lastArgs = arguments;
+ lastThis = this;
+ lastCallTime = time;
+
+ if (isInvoking) {
+ if (timerId === undefined) {
+ return leadingEdge(lastCallTime);
+ }
+ if (maxing) {
+ // Handle invocations in a tight loop.
+ timerId = setTimeout(timerExpired, wait);
+ return invokeFunc(lastCallTime);
+ }
+ }
+ if (timerId === undefined) {
+ timerId = setTimeout(timerExpired, wait);
+ }
+ return result;
+ }
+ debounced.cancel = cancel;
+ debounced.flush = flush;
+ return debounced;
+ }
+
+ /**
+ * Defers invoking the `func` until the current call stack has cleared. Any
+ * additional arguments are provided to `func` when it's invoked.
+ *
+ * @static
+ * @memberOf _
+ * @since 0.1.0
+ * @category Function
+ * @param {Function} func The function to defer.
+ * @param {...*} [args] The arguments to invoke `func` with.
+ * @returns {number} Returns the timer id.
+ * @example
+ *
+ * _.defer(function(text) {
+ * console.log(text);
+ * }, 'deferred');
+ * // => Logs 'deferred' after one millisecond.
+ */
+ var defer = baseRest(function(func, args) {
+ return baseDelay(func, 1, args);
+ });
+
+ /**
+ * Invokes `func` after `wait` milliseconds. Any additional arguments are
+ * provided to `func` when it's invoked.
+ *
+ * @static
+ * @memberOf _
+ * @since 0.1.0
+ * @category Function
+ * @param {Function} func The function to delay.
+ * @param {number} wait The number of milliseconds to delay invocation.
+ * @param {...*} [args] The arguments to invoke `func` with.
+ * @returns {number} Returns the timer id.
+ * @example
+ *
+ * _.delay(function(text) {
+ * console.log(text);
+ * }, 1000, 'later');
+ * // => Logs 'later' after one second.
+ */
+ var delay = baseRest(function(func, wait, args) {
+ return baseDelay(func, toNumber(wait) || 0, args);
+ });
+
+ /**
+ * Creates a function that invokes `func` with arguments reversed.
+ *
+ * @static
+ * @memberOf _
+ * @since 4.0.0
+ * @category Function
+ * @param {Function} func The function to flip arguments for.
+ * @returns {Function} Returns the new flipped function.
+ * @example
+ *
+ * var flipped = _.flip(function() {
+ * return _.toArray(arguments);
+ * });
+ *
+ * flipped('a', 'b', 'c', 'd');
+ * // => ['d', 'c', 'b', 'a']
+ */
+ function flip(func) {
+ return createWrap(func, WRAP_FLIP_FLAG);
+ }
+
+ /**
+ * Creates a function that memoizes the result of `func`. If `resolver` is
+ * provided, it determines the cache key for storing the result based on the
+ * arguments provided to the memoized function. By default, the first argument
+ * provided to the memoized function is used as the map cache key. The `func`
+ * is invoked with the `this` binding of the memoized function.
+ *
+ * **Note:** The cache is exposed as the `cache` property on the memoized
+ * function. Its creation may be customized by replacing the `_.memoize.Cache`
+ * constructor with one whose instances implement the
+ * [`Map`](http://ecma-international.org/ecma-262/7.0/#sec-properties-of-the-map-prototype-object)
+ * method interface of `clear`, `delete`, `get`, `has`, and `set`.
+ *
+ * @static
+ * @memberOf _
+ * @since 0.1.0
+ * @category Function
+ * @param {Function} func The function to have its output memoized.
+ * @param {Function} [resolver] The function to resolve the cache key.
+ * @returns {Function} Returns the new memoized function.
+ * @example
+ *
+ * var object = { 'a': 1, 'b': 2 };
+ * var other = { 'c': 3, 'd': 4 };
+ *
+ * var values = _.memoize(_.values);
+ * values(object);
+ * // => [1, 2]
+ *
+ * values(other);
+ * // => [3, 4]
+ *
+ * object.a = 2;
+ * values(object);
+ * // => [1, 2]
+ *
+ * // Modify the result cache.
+ * values.cache.set(object, ['a', 'b']);
+ * values(object);
+ * // => ['a', 'b']
+ *
+ * // Replace `_.memoize.Cache`.
+ * _.memoize.Cache = WeakMap;
+ */
+ function memoize(func, resolver) {
+ if (typeof func != 'function' || (resolver != null && typeof resolver != 'function')) {
+ throw new TypeError(FUNC_ERROR_TEXT);
+ }
+ var memoized = function() {
+ var args = arguments,
+ key = resolver ? resolver.apply(this, args) : args[0],
+ cache = memoized.cache;
+
+ if (cache.has(key)) {
+ return cache.get(key);
+ }
+ var result = func.apply(this, args);
+ memoized.cache = cache.set(key, result) || cache;
+ return result;
+ };
+ memoized.cache = new (memoize.Cache || MapCache);
+ return memoized;
+ }
+
+ // Expose `MapCache`.
+ memoize.Cache = MapCache;
+
+ /**
+ * Creates a function that negates the result of the predicate `func`. The
+ * `func` predicate is invoked with the `this` binding and arguments of the
+ * created function.
+ *
+ * @static
+ * @memberOf _
+ * @since 3.0.0
+ * @category Function
+ * @param {Function} predicate The predicate to negate.
+ * @returns {Function} Returns the new negated function.
+ * @example
+ *
+ * function isEven(n) {
+ * return n % 2 == 0;
+ * }
+ *
+ * _.filter([1, 2, 3, 4, 5, 6], _.negate(isEven));
+ * // => [1, 3, 5]
+ */
+ function negate(predicate) {
+ if (typeof predicate != 'function') {
+ throw new TypeError(FUNC_ERROR_TEXT);
+ }
+ return function() {
+ var args = arguments;
+ switch (args.length) {
+ case 0: return !predicate.call(this);
+ case 1: return !predicate.call(this, args[0]);
+ case 2: return !predicate.call(this, args[0], args[1]);
+ case 3: return !predicate.call(this, args[0], args[1], args[2]);
+ }
+ return !predicate.apply(this, args);
+ };
+ }
+
+ /**
+ * Creates a function that is restricted to invoking `func` once. Repeat calls
+ * to the function return the value of the first invocation. The `func` is
+ * invoked with the `this` binding and arguments of the created function.
+ *
+ * @static
+ * @memberOf _
+ * @since 0.1.0
+ * @category Function
+ * @param {Function} func The function to restrict.
+ * @returns {Function} Returns the new restricted function.
+ * @example
+ *
+ * var initialize = _.once(createApplication);
+ * initialize();
+ * initialize();
+ * // => `createApplication` is invoked once
+ */
+ function once(func) {
+ return before(2, func);
+ }
+
+ /**
+ * Creates a function that invokes `func` with its arguments transformed.
+ *
+ * @static
+ * @since 4.0.0
+ * @memberOf _
+ * @category Function
+ * @param {Function} func The function to wrap.
+ * @param {...(Function|Function[])} [transforms=[_.identity]]
+ * The argument transforms.
+ * @returns {Function} Returns the new function.
+ * @example
+ *
+ * function doubled(n) {
+ * return n * 2;
+ * }
+ *
+ * function square(n) {
+ * return n * n;
+ * }
+ *
+ * var func = _.overArgs(function(x, y) {
+ * return [x, y];
+ * }, [square, doubled]);
+ *
+ * func(9, 3);
+ * // => [81, 6]
+ *
+ * func(10, 5);
+ * // => [100, 10]
+ */
+ var overArgs = castRest(function(func, transforms) {
+ transforms = (transforms.length == 1 && isArray(transforms[0]))
+ ? arrayMap(transforms[0], baseUnary(getIteratee()))
+ : arrayMap(baseFlatten(transforms, 1), baseUnary(getIteratee()));
+
+ var funcsLength = transforms.length;
+ return baseRest(function(args) {
+ var index = -1,
+ length = nativeMin(args.length, funcsLength);
+
+ while (++index < length) {
+ args[index] = transforms[index].call(this, args[index]);
+ }
+ return apply(func, this, args);
+ });
+ });
+
+ /**
+ * Creates a function that invokes `func` with `partials` prepended to the
+ * arguments it receives. This method is like `_.bind` except it does **not**
+ * alter the `this` binding.
+ *
+ * The `_.partial.placeholder` value, which defaults to `_` in monolithic
+ * builds, may be used as a placeholder for partially applied arguments.
+ *
+ * **Note:** This method doesn't set the "length" property of partially
+ * applied functions.
+ *
+ * @static
+ * @memberOf _
+ * @since 0.2.0
+ * @category Function
+ * @param {Function} func The function to partially apply arguments to.
+ * @param {...*} [partials] The arguments to be partially applied.
+ * @returns {Function} Returns the new partially applied function.
+ * @example
+ *
+ * function greet(greeting, name) {
+ * return greeting + ' ' + name;
+ * }
+ *
+ * var sayHelloTo = _.partial(greet, 'hello');
+ * sayHelloTo('fred');
+ * // => 'hello fred'
+ *
+ * // Partially applied with placeholders.
+ * var greetFred = _.partial(greet, _, 'fred');
+ * greetFred('hi');
+ * // => 'hi fred'
+ */
+ var partial = baseRest(function(func, partials) {
+ var holders = replaceHolders(partials, getHolder(partial));
+ return createWrap(func, WRAP_PARTIAL_FLAG, undefined, partials, holders);
+ });
+
+ /**
+ * This method is like `_.partial` except that partially applied arguments
+ * are appended to the arguments it receives.
+ *
+ * The `_.partialRight.placeholder` value, which defaults to `_` in monolithic
+ * builds, may be used as a placeholder for partially applied arguments.
+ *
+ * **Note:** This method doesn't set the "length" property of partially
+ * applied functions.
+ *
+ * @static
+ * @memberOf _
+ * @since 1.0.0
+ * @category Function
+ * @param {Function} func The function to partially apply arguments to.
+ * @param {...*} [partials] The arguments to be partially applied.
+ * @returns {Function} Returns the new partially applied function.
+ * @example
+ *
+ * function greet(greeting, name) {
+ * return greeting + ' ' + name;
+ * }
+ *
+ * var greetFred = _.partialRight(greet, 'fred');
+ * greetFred('hi');
+ * // => 'hi fred'
+ *
+ * // Partially applied with placeholders.
+ * var sayHelloTo = _.partialRight(greet, 'hello', _);
+ * sayHelloTo('fred');
+ * // => 'hello fred'
+ */
+ var partialRight = baseRest(function(func, partials) {
+ var holders = replaceHolders(partials, getHolder(partialRight));
+ return createWrap(func, WRAP_PARTIAL_RIGHT_FLAG, undefined, partials, holders);
+ });
+
+ /**
+ * Creates a function that invokes `func` with arguments arranged according
+ * to the specified `indexes` where the argument value at the first index is
+ * provided as the first argument, the argument value at the second index is
+ * provided as the second argument, and so on.
+ *
+ * @static
+ * @memberOf _
+ * @since 3.0.0
+ * @category Function
+ * @param {Function} func The function to rearrange arguments for.
+ * @param {...(number|number[])} indexes The arranged argument indexes.
+ * @returns {Function} Returns the new function.
+ * @example
+ *
+ * var rearged = _.rearg(function(a, b, c) {
+ * return [a, b, c];
+ * }, [2, 0, 1]);
+ *
+ * rearged('b', 'c', 'a')
+ * // => ['a', 'b', 'c']
+ */
+ var rearg = flatRest(function(func, indexes) {
+ return createWrap(func, WRAP_REARG_FLAG, undefined, undefined, undefined, indexes);
+ });
+
+ /**
+ * Creates a function that invokes `func` with the `this` binding of the
+ * created function and arguments from `start` and beyond provided as
+ * an array.
+ *
+ * **Note:** This method is based on the
+ * [rest parameter](https://mdn.io/rest_parameters).
+ *
+ * @static
+ * @memberOf _
+ * @since 4.0.0
+ * @category Function
+ * @param {Function} func The function to apply a rest parameter to.
+ * @param {number} [start=func.length-1] The start position of the rest parameter.
+ * @returns {Function} Returns the new function.
+ * @example
+ *
+ * var say = _.rest(function(what, names) {
+ * return what + ' ' + _.initial(names).join(', ') +
+ * (_.size(names) > 1 ? ', & ' : '') + _.last(names);
+ * });
+ *
+ * say('hello', 'fred', 'barney', 'pebbles');
+ * // => 'hello fred, barney, & pebbles'
+ */
+ function rest(func, start) {
+ if (typeof func != 'function') {
+ throw new TypeError(FUNC_ERROR_TEXT);
+ }
+ start = start === undefined ? start : toInteger(start);
+ return baseRest(func, start);
+ }
+
+ /**
+ * Creates a function that invokes `func` with the `this` binding of the
+ * create function and an array of arguments much like
+ * [`Function#apply`](http://www.ecma-international.org/ecma-262/7.0/#sec-function.prototype.apply).
+ *
+ * **Note:** This method is based on the
+ * [spread operator](https://mdn.io/spread_operator).
+ *
+ * @static
+ * @memberOf _
+ * @since 3.2.0
+ * @category Function
+ * @param {Function} func The function to spread arguments over.
+ * @param {number} [start=0] The start position of the spread.
+ * @returns {Function} Returns the new function.
+ * @example
+ *
+ * var say = _.spread(function(who, what) {
+ * return who + ' says ' + what;
+ * });
+ *
+ * say(['fred', 'hello']);
+ * // => 'fred says hello'
+ *
+ * var numbers = Promise.all([
+ * Promise.resolve(40),
+ * Promise.resolve(36)
+ * ]);
+ *
+ * numbers.then(_.spread(function(x, y) {
+ * return x + y;
+ * }));
+ * // => a Promise of 76
+ */
+ function spread(func, start) {
+ if (typeof func != 'function') {
+ throw new TypeError(FUNC_ERROR_TEXT);
+ }
+ start = start == null ? 0 : nativeMax(toInteger(start), 0);
+ return baseRest(function(args) {
+ var array = args[start],
+ otherArgs = castSlice(args, 0, start);
+
+ if (array) {
+ arrayPush(otherArgs, array);
+ }
+ return apply(func, this, otherArgs);
+ });
+ }
+
+ /**
+ * Creates a throttled function that only invokes `func` at most once per
+ * every `wait` milliseconds. The throttled function comes with a `cancel`
+ * method to cancel delayed `func` invocations and a `flush` method to
+ * immediately invoke them. Provide `options` to indicate whether `func`
+ * should be invoked on the leading and/or trailing edge of the `wait`
+ * timeout. The `func` is invoked with the last arguments provided to the
+ * throttled function. Subsequent calls to the throttled function return the
+ * result of the last `func` invocation.
+ *
+ * **Note:** If `leading` and `trailing` options are `true`, `func` is
+ * invoked on the trailing edge of the timeout only if the throttled function
+ * is invoked more than once during the `wait` timeout.
+ *
+ * If `wait` is `0` and `leading` is `false`, `func` invocation is deferred
+ * until to the next tick, similar to `setTimeout` with a timeout of `0`.
+ *
+ * See [David Corbacho's article](https://css-tricks.com/debouncing-throttling-explained-examples/)
+ * for details over the differences between `_.throttle` and `_.debounce`.
+ *
+ * @static
+ * @memberOf _
+ * @since 0.1.0
+ * @category Function
+ * @param {Function} func The function to throttle.
+ * @param {number} [wait=0] The number of milliseconds to throttle invocations to.
+ * @param {Object} [options={}] The options object.
+ * @param {boolean} [options.leading=true]
+ * Specify invoking on the leading edge of the timeout.
+ * @param {boolean} [options.trailing=true]
+ * Specify invoking on the trailing edge of the timeout.
+ * @returns {Function} Returns the new throttled function.
+ * @example
+ *
+ * // Avoid excessively updating the position while scrolling.
+ * jQuery(window).on('scroll', _.throttle(updatePosition, 100));
+ *
+ * // Invoke `renewToken` when the click event is fired, but not more than once every 5 minutes.
+ * var throttled = _.throttle(renewToken, 300000, { 'trailing': false });
+ * jQuery(element).on('click', throttled);
+ *
+ * // Cancel the trailing throttled invocation.
+ * jQuery(window).on('popstate', throttled.cancel);
+ */
+ function throttle(func, wait, options) {
+ var leading = true,
+ trailing = true;
+
+ if (typeof func != 'function') {
+ throw new TypeError(FUNC_ERROR_TEXT);
+ }
+ if (isObject(options)) {
+ leading = 'leading' in options ? !!options.leading : leading;
+ trailing = 'trailing' in options ? !!options.trailing : trailing;
+ }
+ return debounce(func, wait, {
+ 'leading': leading,
+ 'maxWait': wait,
+ 'trailing': trailing
+ });
+ }
+
+ /**
+ * Creates a function that accepts up to one argument, ignoring any
+ * additional arguments.
+ *
+ * @static
+ * @memberOf _
+ * @since 4.0.0
+ * @category Function
+ * @param {Function} func The function to cap arguments for.
+ * @returns {Function} Returns the new capped function.
+ * @example
+ *
+ * _.map(['6', '8', '10'], _.unary(parseInt));
+ * // => [6, 8, 10]
+ */
+ function unary(func) {
+ return ary(func, 1);
+ }
+
+ /**
+ * Creates a function that provides `value` to `wrapper` as its first
+ * argument. Any additional arguments provided to the function are appended
+ * to those provided to the `wrapper`. The wrapper is invoked with the `this`
+ * binding of the created function.
+ *
+ * @static
+ * @memberOf _
+ * @since 0.1.0
+ * @category Function
+ * @param {*} value The value to wrap.
+ * @param {Function} [wrapper=identity] The wrapper function.
+ * @returns {Function} Returns the new function.
+ * @example
+ *
+ * var p = _.wrap(_.escape, function(func, text) {
+ * return '' + func(text) + '
';
+ * });
+ *
+ * p('fred, barney, & pebbles');
+ * // => 'fred, barney, & pebbles
'
+ */
+ function wrap(value, wrapper) {
+ return partial(castFunction(wrapper), value);
+ }
+
+ /*------------------------------------------------------------------------*/
+
+ /**
+ * Casts `value` as an array if it's not one.
+ *
+ * @static
+ * @memberOf _
+ * @since 4.4.0
+ * @category Lang
+ * @param {*} value The value to inspect.
+ * @returns {Array} Returns the cast array.
+ * @example
+ *
+ * _.castArray(1);
+ * // => [1]
+ *
+ * _.castArray({ 'a': 1 });
+ * // => [{ 'a': 1 }]
+ *
+ * _.castArray('abc');
+ * // => ['abc']
+ *
+ * _.castArray(null);
+ * // => [null]
+ *
+ * _.castArray(undefined);
+ * // => [undefined]
+ *
+ * _.castArray();
+ * // => []
+ *
+ * var array = [1, 2, 3];
+ * console.log(_.castArray(array) === array);
+ * // => true
+ */
+ function castArray() {
+ if (!arguments.length) {
+ return [];
+ }
+ var value = arguments[0];
+ return isArray(value) ? value : [value];
+ }
+
+ /**
+ * Creates a shallow clone of `value`.
+ *
+ * **Note:** This method is loosely based on the
+ * [structured clone algorithm](https://mdn.io/Structured_clone_algorithm)
+ * and supports cloning arrays, array buffers, booleans, date objects, maps,
+ * numbers, `Object` objects, regexes, sets, strings, symbols, and typed
+ * arrays. The own enumerable properties of `arguments` objects are cloned
+ * as plain objects. An empty object is returned for uncloneable values such
+ * as error objects, functions, DOM nodes, and WeakMaps.
+ *
+ * @static
+ * @memberOf _
+ * @since 0.1.0
+ * @category Lang
+ * @param {*} value The value to clone.
+ * @returns {*} Returns the cloned value.
+ * @see _.cloneDeep
+ * @example
+ *
+ * var objects = [{ 'a': 1 }, { 'b': 2 }];
+ *
+ * var shallow = _.clone(objects);
+ * console.log(shallow[0] === objects[0]);
+ * // => true
+ */
+ function clone(value) {
+ return baseClone(value, CLONE_SYMBOLS_FLAG);
+ }
+
+ /**
+ * This method is like `_.clone` except that it accepts `customizer` which
+ * is invoked to produce the cloned value. If `customizer` returns `undefined`,
+ * cloning is handled by the method instead. The `customizer` is invoked with
+ * up to four arguments; (value [, index|key, object, stack]).
+ *
+ * @static
+ * @memberOf _
+ * @since 4.0.0
+ * @category Lang
+ * @param {*} value The value to clone.
+ * @param {Function} [customizer] The function to customize cloning.
+ * @returns {*} Returns the cloned value.
+ * @see _.cloneDeepWith
+ * @example
+ *
+ * function customizer(value) {
+ * if (_.isElement(value)) {
+ * return value.cloneNode(false);
+ * }
+ * }
+ *
+ * var el = _.cloneWith(document.body, customizer);
+ *
+ * console.log(el === document.body);
+ * // => false
+ * console.log(el.nodeName);
+ * // => 'BODY'
+ * console.log(el.childNodes.length);
+ * // => 0
+ */
+ function cloneWith(value, customizer) {
+ customizer = typeof customizer == 'function' ? customizer : undefined;
+ return baseClone(value, CLONE_SYMBOLS_FLAG, customizer);
+ }
+
+ /**
+ * This method is like `_.clone` except that it recursively clones `value`.
+ *
+ * @static
+ * @memberOf _
+ * @since 1.0.0
+ * @category Lang
+ * @param {*} value The value to recursively clone.
+ * @returns {*} Returns the deep cloned value.
+ * @see _.clone
+ * @example
+ *
+ * var objects = [{ 'a': 1 }, { 'b': 2 }];
+ *
+ * var deep = _.cloneDeep(objects);
+ * console.log(deep[0] === objects[0]);
+ * // => false
+ */
+ function cloneDeep(value) {
+ return baseClone(value, CLONE_DEEP_FLAG | CLONE_SYMBOLS_FLAG);
+ }
+
+ /**
+ * This method is like `_.cloneWith` except that it recursively clones `value`.
+ *
+ * @static
+ * @memberOf _
+ * @since 4.0.0
+ * @category Lang
+ * @param {*} value The value to recursively clone.
+ * @param {Function} [customizer] The function to customize cloning.
+ * @returns {*} Returns the deep cloned value.
+ * @see _.cloneWith
+ * @example
+ *
+ * function customizer(value) {
+ * if (_.isElement(value)) {
+ * return value.cloneNode(true);
+ * }
+ * }
+ *
+ * var el = _.cloneDeepWith(document.body, customizer);
+ *
+ * console.log(el === document.body);
+ * // => false
+ * console.log(el.nodeName);
+ * // => 'BODY'
+ * console.log(el.childNodes.length);
+ * // => 20
+ */
+ function cloneDeepWith(value, customizer) {
+ customizer = typeof customizer == 'function' ? customizer : undefined;
+ return baseClone(value, CLONE_DEEP_FLAG | CLONE_SYMBOLS_FLAG, customizer);
+ }
+
+ /**
+ * Checks if `object` conforms to `source` by invoking the predicate
+ * properties of `source` with the corresponding property values of `object`.
+ *
+ * **Note:** This method is equivalent to `_.conforms` when `source` is
+ * partially applied.
+ *
+ * @static
+ * @memberOf _
+ * @since 4.14.0
+ * @category Lang
+ * @param {Object} object The object to inspect.
+ * @param {Object} source The object of property predicates to conform to.
+ * @returns {boolean} Returns `true` if `object` conforms, else `false`.
+ * @example
+ *
+ * var object = { 'a': 1, 'b': 2 };
+ *
+ * _.conformsTo(object, { 'b': function(n) { return n > 1; } });
+ * // => true
+ *
+ * _.conformsTo(object, { 'b': function(n) { return n > 2; } });
+ * // => false
+ */
+ function conformsTo(object, source) {
+ return source == null || baseConformsTo(object, source, keys(source));
+ }
+
+ /**
+ * Performs a
+ * [`SameValueZero`](http://ecma-international.org/ecma-262/7.0/#sec-samevaluezero)
+ * comparison between two values to determine if they are equivalent.
+ *
+ * @static
+ * @memberOf _
+ * @since 4.0.0
+ * @category Lang
+ * @param {*} value The value to compare.
+ * @param {*} other The other value to compare.
+ * @returns {boolean} Returns `true` if the values are equivalent, else `false`.
+ * @example
+ *
+ * var object = { 'a': 1 };
+ * var other = { 'a': 1 };
+ *
+ * _.eq(object, object);
+ * // => true
+ *
+ * _.eq(object, other);
+ * // => false
+ *
+ * _.eq('a', 'a');
+ * // => true
+ *
+ * _.eq('a', Object('a'));
+ * // => false
+ *
+ * _.eq(NaN, NaN);
+ * // => true
+ */
+ function eq(value, other) {
+ return value === other || (value !== value && other !== other);
+ }
+
+ /**
+ * Checks if `value` is greater than `other`.
+ *
+ * @static
+ * @memberOf _
+ * @since 3.9.0
+ * @category Lang
+ * @param {*} value The value to compare.
+ * @param {*} other The other value to compare.
+ * @returns {boolean} Returns `true` if `value` is greater than `other`,
+ * else `false`.
+ * @see _.lt
+ * @example
+ *
+ * _.gt(3, 1);
+ * // => true
+ *
+ * _.gt(3, 3);
+ * // => false
+ *
+ * _.gt(1, 3);
+ * // => false
+ */
+ var gt = createRelationalOperation(baseGt);
+
+ /**
+ * Checks if `value` is greater than or equal to `other`.
+ *
+ * @static
+ * @memberOf _
+ * @since 3.9.0
+ * @category Lang
+ * @param {*} value The value to compare.
+ * @param {*} other The other value to compare.
+ * @returns {boolean} Returns `true` if `value` is greater than or equal to
+ * `other`, else `false`.
+ * @see _.lte
+ * @example
+ *
+ * _.gte(3, 1);
+ * // => true
+ *
+ * _.gte(3, 3);
+ * // => true
+ *
+ * _.gte(1, 3);
+ * // => false
+ */
+ var gte = createRelationalOperation(function(value, other) {
+ return value >= other;
+ });
+
+ /**
+ * Checks if `value` is likely an `arguments` object.
+ *
+ * @static
+ * @memberOf _
+ * @since 0.1.0
+ * @category Lang
+ * @param {*} value The value to check.
+ * @returns {boolean} Returns `true` if `value` is an `arguments` object,
+ * else `false`.
+ * @example
+ *
+ * _.isArguments(function() { return arguments; }());
+ * // => true
+ *
+ * _.isArguments([1, 2, 3]);
+ * // => false
+ */
+ var isArguments = baseIsArguments(function() { return arguments; }()) ? baseIsArguments : function(value) {
+ return isObjectLike(value) && hasOwnProperty.call(value, 'callee') &&
+ !propertyIsEnumerable.call(value, 'callee');
+ };
+
+ /**
+ * Checks if `value` is classified as an `Array` object.
+ *
+ * @static
+ * @memberOf _
+ * @since 0.1.0
+ * @category Lang
+ * @param {*} value The value to check.
+ * @returns {boolean} Returns `true` if `value` is an array, else `false`.
+ * @example
+ *
+ * _.isArray([1, 2, 3]);
+ * // => true
+ *
+ * _.isArray(document.body.children);
+ * // => false
+ *
+ * _.isArray('abc');
+ * // => false
+ *
+ * _.isArray(_.noop);
+ * // => false
+ */
+ var isArray = Array.isArray;
+
+ /**
+ * Checks if `value` is classified as an `ArrayBuffer` object.
+ *
+ * @static
+ * @memberOf _
+ * @since 4.3.0
+ * @category Lang
+ * @param {*} value The value to check.
+ * @returns {boolean} Returns `true` if `value` is an array buffer, else `false`.
+ * @example
+ *
+ * _.isArrayBuffer(new ArrayBuffer(2));
+ * // => true
+ *
+ * _.isArrayBuffer(new Array(2));
+ * // => false
+ */
+ var isArrayBuffer = nodeIsArrayBuffer ? baseUnary(nodeIsArrayBuffer) : baseIsArrayBuffer;
+
+ /**
+ * Checks if `value` is array-like. A value is considered array-like if it's
+ * not a function and has a `value.length` that's an integer greater than or
+ * equal to `0` and less than or equal to `Number.MAX_SAFE_INTEGER`.
+ *
+ * @static
+ * @memberOf _
+ * @since 4.0.0
+ * @category Lang
+ * @param {*} value The value to check.
+ * @returns {boolean} Returns `true` if `value` is array-like, else `false`.
+ * @example
+ *
+ * _.isArrayLike([1, 2, 3]);
+ * // => true
+ *
+ * _.isArrayLike(document.body.children);
+ * // => true
+ *
+ * _.isArrayLike('abc');
+ * // => true
+ *
+ * _.isArrayLike(_.noop);
+ * // => false
+ */
+ function isArrayLike(value) {
+ return value != null && isLength(value.length) && !isFunction(value);
+ }
+
+ /**
+ * This method is like `_.isArrayLike` except that it also checks if `value`
+ * is an object.
+ *
+ * @static
+ * @memberOf _
+ * @since 4.0.0
+ * @category Lang
+ * @param {*} value The value to check.
+ * @returns {boolean} Returns `true` if `value` is an array-like object,
+ * else `false`.
+ * @example
+ *
+ * _.isArrayLikeObject([1, 2, 3]);
+ * // => true
+ *
+ * _.isArrayLikeObject(document.body.children);
+ * // => true
+ *
+ * _.isArrayLikeObject('abc');
+ * // => false
+ *
+ * _.isArrayLikeObject(_.noop);
+ * // => false
+ */
+ function isArrayLikeObject(value) {
+ return isObjectLike(value) && isArrayLike(value);
+ }
+
+ /**
+ * Checks if `value` is classified as a boolean primitive or object.
+ *
+ * @static
+ * @memberOf _
+ * @since 0.1.0
+ * @category Lang
+ * @param {*} value The value to check.
+ * @returns {boolean} Returns `true` if `value` is a boolean, else `false`.
+ * @example
+ *
+ * _.isBoolean(false);
+ * // => true
+ *
+ * _.isBoolean(null);
+ * // => false
+ */
+ function isBoolean(value) {
+ return value === true || value === false ||
+ (isObjectLike(value) && baseGetTag(value) == boolTag);
+ }
+
+ /**
+ * Checks if `value` is a buffer.
+ *
+ * @static
+ * @memberOf _
+ * @since 4.3.0
+ * @category Lang
+ * @param {*} value The value to check.
+ * @returns {boolean} Returns `true` if `value` is a buffer, else `false`.
+ * @example
+ *
+ * _.isBuffer(new Buffer(2));
+ * // => true
+ *
+ * _.isBuffer(new Uint8Array(2));
+ * // => false
+ */
+ var isBuffer = nativeIsBuffer || stubFalse;
+
+ /**
+ * Checks if `value` is classified as a `Date` object.
+ *
+ * @static
+ * @memberOf _
+ * @since 0.1.0
+ * @category Lang
+ * @param {*} value The value to check.
+ * @returns {boolean} Returns `true` if `value` is a date object, else `false`.
+ * @example
+ *
+ * _.isDate(new Date);
+ * // => true
+ *
+ * _.isDate('Mon April 23 2012');
+ * // => false
+ */
+ var isDate = nodeIsDate ? baseUnary(nodeIsDate) : baseIsDate;
+
+ /**
+ * Checks if `value` is likely a DOM element.
+ *
+ * @static
+ * @memberOf _
+ * @since 0.1.0
+ * @category Lang
+ * @param {*} value The value to check.
+ * @returns {boolean} Returns `true` if `value` is a DOM element, else `false`.
+ * @example
+ *
+ * _.isElement(document.body);
+ * // => true
+ *
+ * _.isElement('');
+ * // => false
+ */
+ function isElement(value) {
+ return isObjectLike(value) && value.nodeType === 1 && !isPlainObject(value);
+ }
+
+ /**
+ * Checks if `value` is an empty object, collection, map, or set.
+ *
+ * Objects are considered empty if they have no own enumerable string keyed
+ * properties.
+ *
+ * Array-like values such as `arguments` objects, arrays, buffers, strings, or
+ * jQuery-like collections are considered empty if they have a `length` of `0`.
+ * Similarly, maps and sets are considered empty if they have a `size` of `0`.
+ *
+ * @static
+ * @memberOf _
+ * @since 0.1.0
+ * @category Lang
+ * @param {*} value The value to check.
+ * @returns {boolean} Returns `true` if `value` is empty, else `false`.
+ * @example
+ *
+ * _.isEmpty(null);
+ * // => true
+ *
+ * _.isEmpty(true);
+ * // => true
+ *
+ * _.isEmpty(1);
+ * // => true
+ *
+ * _.isEmpty([1, 2, 3]);
+ * // => false
+ *
+ * _.isEmpty({ 'a': 1 });
+ * // => false
+ */
+ function isEmpty(value) {
+ if (value == null) {
+ return true;
+ }
+ if (isArrayLike(value) &&
+ (isArray(value) || typeof value == 'string' || typeof value.splice == 'function' ||
+ isBuffer(value) || isTypedArray(value) || isArguments(value))) {
+ return !value.length;
+ }
+ var tag = getTag(value);
+ if (tag == mapTag || tag == setTag) {
+ return !value.size;
+ }
+ if (isPrototype(value)) {
+ return !baseKeys(value).length;
+ }
+ for (var key in value) {
+ if (hasOwnProperty.call(value, key)) {
+ return false;
+ }
+ }
+ return true;
+ }
+
+ /**
+ * Performs a deep comparison between two values to determine if they are
+ * equivalent.
+ *
+ * **Note:** This method supports comparing arrays, array buffers, booleans,
+ * date objects, error objects, maps, numbers, `Object` objects, regexes,
+ * sets, strings, symbols, and typed arrays. `Object` objects are compared
+ * by their own, not inherited, enumerable properties. Functions and DOM
+ * nodes are compared by strict equality, i.e. `===`.
+ *
+ * @static
+ * @memberOf _
+ * @since 0.1.0
+ * @category Lang
+ * @param {*} value The value to compare.
+ * @param {*} other The other value to compare.
+ * @returns {boolean} Returns `true` if the values are equivalent, else `false`.
+ * @example
+ *
+ * var object = { 'a': 1 };
+ * var other = { 'a': 1 };
+ *
+ * _.isEqual(object, other);
+ * // => true
+ *
+ * object === other;
+ * // => false
+ */
+ function isEqual(value, other) {
+ return baseIsEqual(value, other);
+ }
+
+ /**
+ * This method is like `_.isEqual` except that it accepts `customizer` which
+ * is invoked to compare values. If `customizer` returns `undefined`, comparisons
+ * are handled by the method instead. The `customizer` is invoked with up to
+ * six arguments: (objValue, othValue [, index|key, object, other, stack]).
+ *
+ * @static
+ * @memberOf _
+ * @since 4.0.0
+ * @category Lang
+ * @param {*} value The value to compare.
+ * @param {*} other The other value to compare.
+ * @param {Function} [customizer] The function to customize comparisons.
+ * @returns {boolean} Returns `true` if the values are equivalent, else `false`.
+ * @example
+ *
+ * function isGreeting(value) {
+ * return /^h(?:i|ello)$/.test(value);
+ * }
+ *
+ * function customizer(objValue, othValue) {
+ * if (isGreeting(objValue) && isGreeting(othValue)) {
+ * return true;
+ * }
+ * }
+ *
+ * var array = ['hello', 'goodbye'];
+ * var other = ['hi', 'goodbye'];
+ *
+ * _.isEqualWith(array, other, customizer);
+ * // => true
+ */
+ function isEqualWith(value, other, customizer) {
+ customizer = typeof customizer == 'function' ? customizer : undefined;
+ var result = customizer ? customizer(value, other) : undefined;
+ return result === undefined ? baseIsEqual(value, other, undefined, customizer) : !!result;
+ }
+
+ /**
+ * Checks if `value` is an `Error`, `EvalError`, `RangeError`, `ReferenceError`,
+ * `SyntaxError`, `TypeError`, or `URIError` object.
+ *
+ * @static
+ * @memberOf _
+ * @since 3.0.0
+ * @category Lang
+ * @param {*} value The value to check.
+ * @returns {boolean} Returns `true` if `value` is an error object, else `false`.
+ * @example
+ *
+ * _.isError(new Error);
+ * // => true
+ *
+ * _.isError(Error);
+ * // => false
+ */
+ function isError(value) {
+ if (!isObjectLike(value)) {
+ return false;
+ }
+ var tag = baseGetTag(value);
+ return tag == errorTag || tag == domExcTag ||
+ (typeof value.message == 'string' && typeof value.name == 'string' && !isPlainObject(value));
+ }
+
+ /**
+ * Checks if `value` is a finite primitive number.
+ *
+ * **Note:** This method is based on
+ * [`Number.isFinite`](https://mdn.io/Number/isFinite).
+ *
+ * @static
+ * @memberOf _
+ * @since 0.1.0
+ * @category Lang
+ * @param {*} value The value to check.
+ * @returns {boolean} Returns `true` if `value` is a finite number, else `false`.
+ * @example
+ *
+ * _.isFinite(3);
+ * // => true
+ *
+ * _.isFinite(Number.MIN_VALUE);
+ * // => true
+ *
+ * _.isFinite(Infinity);
+ * // => false
+ *
+ * _.isFinite('3');
+ * // => false
+ */
+ function isFinite(value) {
+ return typeof value == 'number' && nativeIsFinite(value);
+ }
+
+ /**
+ * Checks if `value` is classified as a `Function` object.
+ *
+ * @static
+ * @memberOf _
+ * @since 0.1.0
+ * @category Lang
+ * @param {*} value The value to check.
+ * @returns {boolean} Returns `true` if `value` is a function, else `false`.
+ * @example
+ *
+ * _.isFunction(_);
+ * // => true
+ *
+ * _.isFunction(/abc/);
+ * // => false
+ */
+ function isFunction(value) {
+ if (!isObject(value)) {
+ return false;
+ }
+ // The use of `Object#toString` avoids issues with the `typeof` operator
+ // in Safari 9 which returns 'object' for typed arrays and other constructors.
+ var tag = baseGetTag(value);
+ return tag == funcTag || tag == genTag || tag == asyncTag || tag == proxyTag;
+ }
+
+ /**
+ * Checks if `value` is an integer.
+ *
+ * **Note:** This method is based on
+ * [`Number.isInteger`](https://mdn.io/Number/isInteger).
+ *
+ * @static
+ * @memberOf _
+ * @since 4.0.0
+ * @category Lang
+ * @param {*} value The value to check.
+ * @returns {boolean} Returns `true` if `value` is an integer, else `false`.
+ * @example
+ *
+ * _.isInteger(3);
+ * // => true
+ *
+ * _.isInteger(Number.MIN_VALUE);
+ * // => false
+ *
+ * _.isInteger(Infinity);
+ * // => false
+ *
+ * _.isInteger('3');
+ * // => false
+ */
+ function isInteger(value) {
+ return typeof value == 'number' && value == toInteger(value);
+ }
+
+ /**
+ * Checks if `value` is a valid array-like length.
+ *
+ * **Note:** This method is loosely based on
+ * [`ToLength`](http://ecma-international.org/ecma-262/7.0/#sec-tolength).
+ *
+ * @static
+ * @memberOf _
+ * @since 4.0.0
+ * @category Lang
+ * @param {*} value The value to check.
+ * @returns {boolean} Returns `true` if `value` is a valid length, else `false`.
+ * @example
+ *
+ * _.isLength(3);
+ * // => true
+ *
+ * _.isLength(Number.MIN_VALUE);
+ * // => false
+ *
+ * _.isLength(Infinity);
+ * // => false
+ *
+ * _.isLength('3');
+ * // => false
+ */
+ function isLength(value) {
+ return typeof value == 'number' &&
+ value > -1 && value % 1 == 0 && value <= MAX_SAFE_INTEGER;
+ }
+
+ /**
+ * Checks if `value` is the
+ * [language type](http://www.ecma-international.org/ecma-262/7.0/#sec-ecmascript-language-types)
+ * of `Object`. (e.g. arrays, functions, objects, regexes, `new Number(0)`, and `new String('')`)
+ *
+ * @static
+ * @memberOf _
+ * @since 0.1.0
+ * @category Lang
+ * @param {*} value The value to check.
+ * @returns {boolean} Returns `true` if `value` is an object, else `false`.
+ * @example
+ *
+ * _.isObject({});
+ * // => true
+ *
+ * _.isObject([1, 2, 3]);
+ * // => true
+ *
+ * _.isObject(_.noop);
+ * // => true
+ *
+ * _.isObject(null);
+ * // => false
+ */
+ function isObject(value) {
+ var type = typeof value;
+ return value != null && (type == 'object' || type == 'function');
+ }
+
+ /**
+ * Checks if `value` is object-like. A value is object-like if it's not `null`
+ * and has a `typeof` result of "object".
+ *
+ * @static
+ * @memberOf _
+ * @since 4.0.0
+ * @category Lang
+ * @param {*} value The value to check.
+ * @returns {boolean} Returns `true` if `value` is object-like, else `false`.
+ * @example
+ *
+ * _.isObjectLike({});
+ * // => true
+ *
+ * _.isObjectLike([1, 2, 3]);
+ * // => true
+ *
+ * _.isObjectLike(_.noop);
+ * // => false
+ *
+ * _.isObjectLike(null);
+ * // => false
+ */
+ function isObjectLike(value) {
+ return value != null && typeof value == 'object';
+ }
+
+ /**
+ * Checks if `value` is classified as a `Map` object.
+ *
+ * @static
+ * @memberOf _
+ * @since 4.3.0
+ * @category Lang
+ * @param {*} value The value to check.
+ * @returns {boolean} Returns `true` if `value` is a map, else `false`.
+ * @example
+ *
+ * _.isMap(new Map);
+ * // => true
+ *
+ * _.isMap(new WeakMap);
+ * // => false
+ */
+ var isMap = nodeIsMap ? baseUnary(nodeIsMap) : baseIsMap;
+
+ /**
+ * Performs a partial deep comparison between `object` and `source` to
+ * determine if `object` contains equivalent property values.
+ *
+ * **Note:** This method is equivalent to `_.matches` when `source` is
+ * partially applied.
+ *
+ * Partial comparisons will match empty array and empty object `source`
+ * values against any array or object value, respectively. See `_.isEqual`
+ * for a list of supported value comparisons.
+ *
+ * @static
+ * @memberOf _
+ * @since 3.0.0
+ * @category Lang
+ * @param {Object} object The object to inspect.
+ * @param {Object} source The object of property values to match.
+ * @returns {boolean} Returns `true` if `object` is a match, else `false`.
+ * @example
+ *
+ * var object = { 'a': 1, 'b': 2 };
+ *
+ * _.isMatch(object, { 'b': 2 });
+ * // => true
+ *
+ * _.isMatch(object, { 'b': 1 });
+ * // => false
+ */
+ function isMatch(object, source) {
+ return object === source || baseIsMatch(object, source, getMatchData(source));
+ }
+
+ /**
+ * This method is like `_.isMatch` except that it accepts `customizer` which
+ * is invoked to compare values. If `customizer` returns `undefined`, comparisons
+ * are handled by the method instead. The `customizer` is invoked with five
+ * arguments: (objValue, srcValue, index|key, object, source).
+ *
+ * @static
+ * @memberOf _
+ * @since 4.0.0
+ * @category Lang
+ * @param {Object} object The object to inspect.
+ * @param {Object} source The object of property values to match.
+ * @param {Function} [customizer] The function to customize comparisons.
+ * @returns {boolean} Returns `true` if `object` is a match, else `false`.
+ * @example
+ *
+ * function isGreeting(value) {
+ * return /^h(?:i|ello)$/.test(value);
+ * }
+ *
+ * function customizer(objValue, srcValue) {
+ * if (isGreeting(objValue) && isGreeting(srcValue)) {
+ * return true;
+ * }
+ * }
+ *
+ * var object = { 'greeting': 'hello' };
+ * var source = { 'greeting': 'hi' };
+ *
+ * _.isMatchWith(object, source, customizer);
+ * // => true
+ */
+ function isMatchWith(object, source, customizer) {
+ customizer = typeof customizer == 'function' ? customizer : undefined;
+ return baseIsMatch(object, source, getMatchData(source), customizer);
+ }
+
+ /**
+ * Checks if `value` is `NaN`.
+ *
+ * **Note:** This method is based on
+ * [`Number.isNaN`](https://mdn.io/Number/isNaN) and is not the same as
+ * global [`isNaN`](https://mdn.io/isNaN) which returns `true` for
+ * `undefined` and other non-number values.
+ *
+ * @static
+ * @memberOf _
+ * @since 0.1.0
+ * @category Lang
+ * @param {*} value The value to check.
+ * @returns {boolean} Returns `true` if `value` is `NaN`, else `false`.
+ * @example
+ *
+ * _.isNaN(NaN);
+ * // => true
+ *
+ * _.isNaN(new Number(NaN));
+ * // => true
+ *
+ * isNaN(undefined);
+ * // => true
+ *
+ * _.isNaN(undefined);
+ * // => false
+ */
+ function isNaN(value) {
+ // An `NaN` primitive is the only value that is not equal to itself.
+ // Perform the `toStringTag` check first to avoid errors with some
+ // ActiveX objects in IE.
+ return isNumber(value) && value != +value;
+ }
+
+ /**
+ * Checks if `value` is a pristine native function.
+ *
+ * **Note:** This method can't reliably detect native functions in the presence
+ * of the core-js package because core-js circumvents this kind of detection.
+ * Despite multiple requests, the core-js maintainer has made it clear: any
+ * attempt to fix the detection will be obstructed. As a result, we're left
+ * with little choice but to throw an error. Unfortunately, this also affects
+ * packages, like [babel-polyfill](https://www.npmjs.com/package/babel-polyfill),
+ * which rely on core-js.
+ *
+ * @static
+ * @memberOf _
+ * @since 3.0.0
+ * @category Lang
+ * @param {*} value The value to check.
+ * @returns {boolean} Returns `true` if `value` is a native function,
+ * else `false`.
+ * @example
+ *
+ * _.isNative(Array.prototype.push);
+ * // => true
+ *
+ * _.isNative(_);
+ * // => false
+ */
+ function isNative(value) {
+ if (isMaskable(value)) {
+ throw new Error(CORE_ERROR_TEXT);
+ }
+ return baseIsNative(value);
+ }
+
+ /**
+ * Checks if `value` is `null`.
+ *
+ * @static
+ * @memberOf _
+ * @since 0.1.0
+ * @category Lang
+ * @param {*} value The value to check.
+ * @returns {boolean} Returns `true` if `value` is `null`, else `false`.
+ * @example
+ *
+ * _.isNull(null);
+ * // => true
+ *
+ * _.isNull(void 0);
+ * // => false
+ */
+ function isNull(value) {
+ return value === null;
+ }
+
+ /**
+ * Checks if `value` is `null` or `undefined`.
+ *
+ * @static
+ * @memberOf _
+ * @since 4.0.0
+ * @category Lang
+ * @param {*} value The value to check.
+ * @returns {boolean} Returns `true` if `value` is nullish, else `false`.
+ * @example
+ *
+ * _.isNil(null);
+ * // => true
+ *
+ * _.isNil(void 0);
+ * // => true
+ *
+ * _.isNil(NaN);
+ * // => false
+ */
+ function isNil(value) {
+ return value == null;
+ }
+
+ /**
+ * Checks if `value` is classified as a `Number` primitive or object.
+ *
+ * **Note:** To exclude `Infinity`, `-Infinity`, and `NaN`, which are
+ * classified as numbers, use the `_.isFinite` method.
+ *
+ * @static
+ * @memberOf _
+ * @since 0.1.0
+ * @category Lang
+ * @param {*} value The value to check.
+ * @returns {boolean} Returns `true` if `value` is a number, else `false`.
+ * @example
+ *
+ * _.isNumber(3);
+ * // => true
+ *
+ * _.isNumber(Number.MIN_VALUE);
+ * // => true
+ *
+ * _.isNumber(Infinity);
+ * // => true
+ *
+ * _.isNumber('3');
+ * // => false
+ */
+ function isNumber(value) {
+ return typeof value == 'number' ||
+ (isObjectLike(value) && baseGetTag(value) == numberTag);
+ }
+
+ /**
+ * Checks if `value` is a plain object, that is, an object created by the
+ * `Object` constructor or one with a `[[Prototype]]` of `null`.
+ *
+ * @static
+ * @memberOf _
+ * @since 0.8.0
+ * @category Lang
+ * @param {*} value The value to check.
+ * @returns {boolean} Returns `true` if `value` is a plain object, else `false`.
+ * @example
+ *
+ * function Foo() {
+ * this.a = 1;
+ * }
+ *
+ * _.isPlainObject(new Foo);
+ * // => false
+ *
+ * _.isPlainObject([1, 2, 3]);
+ * // => false
+ *
+ * _.isPlainObject({ 'x': 0, 'y': 0 });
+ * // => true
+ *
+ * _.isPlainObject(Object.create(null));
+ * // => true
+ */
+ function isPlainObject(value) {
+ if (!isObjectLike(value) || baseGetTag(value) != objectTag) {
+ return false;
+ }
+ var proto = getPrototype(value);
+ if (proto === null) {
+ return true;
+ }
+ var Ctor = hasOwnProperty.call(proto, 'constructor') && proto.constructor;
+ return typeof Ctor == 'function' && Ctor instanceof Ctor &&
+ funcToString.call(Ctor) == objectCtorString;
+ }
+
+ /**
+ * Checks if `value` is classified as a `RegExp` object.
+ *
+ * @static
+ * @memberOf _
+ * @since 0.1.0
+ * @category Lang
+ * @param {*} value The value to check.
+ * @returns {boolean} Returns `true` if `value` is a regexp, else `false`.
+ * @example
+ *
+ * _.isRegExp(/abc/);
+ * // => true
+ *
+ * _.isRegExp('/abc/');
+ * // => false
+ */
+ var isRegExp = nodeIsRegExp ? baseUnary(nodeIsRegExp) : baseIsRegExp;
+
+ /**
+ * Checks if `value` is a safe integer. An integer is safe if it's an IEEE-754
+ * double precision number which isn't the result of a rounded unsafe integer.
+ *
+ * **Note:** This method is based on
+ * [`Number.isSafeInteger`](https://mdn.io/Number/isSafeInteger).
+ *
+ * @static
+ * @memberOf _
+ * @since 4.0.0
+ * @category Lang
+ * @param {*} value The value to check.
+ * @returns {boolean} Returns `true` if `value` is a safe integer, else `false`.
+ * @example
+ *
+ * _.isSafeInteger(3);
+ * // => true
+ *
+ * _.isSafeInteger(Number.MIN_VALUE);
+ * // => false
+ *
+ * _.isSafeInteger(Infinity);
+ * // => false
+ *
+ * _.isSafeInteger('3');
+ * // => false
+ */
+ function isSafeInteger(value) {
+ return isInteger(value) && value >= -MAX_SAFE_INTEGER && value <= MAX_SAFE_INTEGER;
+ }
+
+ /**
+ * Checks if `value` is classified as a `Set` object.
+ *
+ * @static
+ * @memberOf _
+ * @since 4.3.0
+ * @category Lang
+ * @param {*} value The value to check.
+ * @returns {boolean} Returns `true` if `value` is a set, else `false`.
+ * @example
+ *
+ * _.isSet(new Set);
+ * // => true
+ *
+ * _.isSet(new WeakSet);
+ * // => false
+ */
+ var isSet = nodeIsSet ? baseUnary(nodeIsSet) : baseIsSet;
+
+ /**
+ * Checks if `value` is classified as a `String` primitive or object.
+ *
+ * @static
+ * @since 0.1.0
+ * @memberOf _
+ * @category Lang
+ * @param {*} value The value to check.
+ * @returns {boolean} Returns `true` if `value` is a string, else `false`.
+ * @example
+ *
+ * _.isString('abc');
+ * // => true
+ *
+ * _.isString(1);
+ * // => false
+ */
+ function isString(value) {
+ return typeof value == 'string' ||
+ (!isArray(value) && isObjectLike(value) && baseGetTag(value) == stringTag);
+ }
+
+ /**
+ * Checks if `value` is classified as a `Symbol` primitive or object.
+ *
+ * @static
+ * @memberOf _
+ * @since 4.0.0
+ * @category Lang
+ * @param {*} value The value to check.
+ * @returns {boolean} Returns `true` if `value` is a symbol, else `false`.
+ * @example
+ *
+ * _.isSymbol(Symbol.iterator);
+ * // => true
+ *
+ * _.isSymbol('abc');
+ * // => false
+ */
+ function isSymbol(value) {
+ return typeof value == 'symbol' ||
+ (isObjectLike(value) && baseGetTag(value) == symbolTag);
+ }
+
+ /**
+ * Checks if `value` is classified as a typed array.
+ *
+ * @static
+ * @memberOf _
+ * @since 3.0.0
+ * @category Lang
+ * @param {*} value The value to check.
+ * @returns {boolean} Returns `true` if `value` is a typed array, else `false`.
+ * @example
+ *
+ * _.isTypedArray(new Uint8Array);
+ * // => true
+ *
+ * _.isTypedArray([]);
+ * // => false
+ */
+ var isTypedArray = nodeIsTypedArray ? baseUnary(nodeIsTypedArray) : baseIsTypedArray;
+
+ /**
+ * Checks if `value` is `undefined`.
+ *
+ * @static
+ * @since 0.1.0
+ * @memberOf _
+ * @category Lang
+ * @param {*} value The value to check.
+ * @returns {boolean} Returns `true` if `value` is `undefined`, else `false`.
+ * @example
+ *
+ * _.isUndefined(void 0);
+ * // => true
+ *
+ * _.isUndefined(null);
+ * // => false
+ */
+ function isUndefined(value) {
+ return value === undefined;
+ }
+
+ /**
+ * Checks if `value` is classified as a `WeakMap` object.
+ *
+ * @static
+ * @memberOf _
+ * @since 4.3.0
+ * @category Lang
+ * @param {*} value The value to check.
+ * @returns {boolean} Returns `true` if `value` is a weak map, else `false`.
+ * @example
+ *
+ * _.isWeakMap(new WeakMap);
+ * // => true
+ *
+ * _.isWeakMap(new Map);
+ * // => false
+ */
+ function isWeakMap(value) {
+ return isObjectLike(value) && getTag(value) == weakMapTag;
+ }
+
+ /**
+ * Checks if `value` is classified as a `WeakSet` object.
+ *
+ * @static
+ * @memberOf _
+ * @since 4.3.0
+ * @category Lang
+ * @param {*} value The value to check.
+ * @returns {boolean} Returns `true` if `value` is a weak set, else `false`.
+ * @example
+ *
+ * _.isWeakSet(new WeakSet);
+ * // => true
+ *
+ * _.isWeakSet(new Set);
+ * // => false
+ */
+ function isWeakSet(value) {
+ return isObjectLike(value) && baseGetTag(value) == weakSetTag;
+ }
+
+ /**
+ * Checks if `value` is less than `other`.
+ *
+ * @static
+ * @memberOf _
+ * @since 3.9.0
+ * @category Lang
+ * @param {*} value The value to compare.
+ * @param {*} other The other value to compare.
+ * @returns {boolean} Returns `true` if `value` is less than `other`,
+ * else `false`.
+ * @see _.gt
+ * @example
+ *
+ * _.lt(1, 3);
+ * // => true
+ *
+ * _.lt(3, 3);
+ * // => false
+ *
+ * _.lt(3, 1);
+ * // => false
+ */
+ var lt = createRelationalOperation(baseLt);
+
+ /**
+ * Checks if `value` is less than or equal to `other`.
+ *
+ * @static
+ * @memberOf _
+ * @since 3.9.0
+ * @category Lang
+ * @param {*} value The value to compare.
+ * @param {*} other The other value to compare.
+ * @returns {boolean} Returns `true` if `value` is less than or equal to
+ * `other`, else `false`.
+ * @see _.gte
+ * @example
+ *
+ * _.lte(1, 3);
+ * // => true
+ *
+ * _.lte(3, 3);
+ * // => true
+ *
+ * _.lte(3, 1);
+ * // => false
+ */
+ var lte = createRelationalOperation(function(value, other) {
+ return value <= other;
+ });
+
+ /**
+ * Converts `value` to an array.
+ *
+ * @static
+ * @since 0.1.0
+ * @memberOf _
+ * @category Lang
+ * @param {*} value The value to convert.
+ * @returns {Array} Returns the converted array.
+ * @example
+ *
+ * _.toArray({ 'a': 1, 'b': 2 });
+ * // => [1, 2]
+ *
+ * _.toArray('abc');
+ * // => ['a', 'b', 'c']
+ *
+ * _.toArray(1);
+ * // => []
+ *
+ * _.toArray(null);
+ * // => []
+ */
+ function toArray(value) {
+ if (!value) {
+ return [];
+ }
+ if (isArrayLike(value)) {
+ return isString(value) ? stringToArray(value) : copyArray(value);
+ }
+ if (symIterator && value[symIterator]) {
+ return iteratorToArray(value[symIterator]());
+ }
+ var tag = getTag(value),
+ func = tag == mapTag ? mapToArray : (tag == setTag ? setToArray : values);
+
+ return func(value);
+ }
+
+ /**
+ * Converts `value` to a finite number.
+ *
+ * @static
+ * @memberOf _
+ * @since 4.12.0
+ * @category Lang
+ * @param {*} value The value to convert.
+ * @returns {number} Returns the converted number.
+ * @example
+ *
+ * _.toFinite(3.2);
+ * // => 3.2
+ *
+ * _.toFinite(Number.MIN_VALUE);
+ * // => 5e-324
+ *
+ * _.toFinite(Infinity);
+ * // => 1.7976931348623157e+308
+ *
+ * _.toFinite('3.2');
+ * // => 3.2
+ */
+ function toFinite(value) {
+ if (!value) {
+ return value === 0 ? value : 0;
+ }
+ value = toNumber(value);
+ if (value === INFINITY || value === -INFINITY) {
+ var sign = (value < 0 ? -1 : 1);
+ return sign * MAX_INTEGER;
+ }
+ return value === value ? value : 0;
+ }
+
+ /**
+ * Converts `value` to an integer.
+ *
+ * **Note:** This method is loosely based on
+ * [`ToInteger`](http://www.ecma-international.org/ecma-262/7.0/#sec-tointeger).
+ *
+ * @static
+ * @memberOf _
+ * @since 4.0.0
+ * @category Lang
+ * @param {*} value The value to convert.
+ * @returns {number} Returns the converted integer.
+ * @example
+ *
+ * _.toInteger(3.2);
+ * // => 3
+ *
+ * _.toInteger(Number.MIN_VALUE);
+ * // => 0
+ *
+ * _.toInteger(Infinity);
+ * // => 1.7976931348623157e+308
+ *
+ * _.toInteger('3.2');
+ * // => 3
+ */
+ function toInteger(value) {
+ var result = toFinite(value),
+ remainder = result % 1;
+
+ return result === result ? (remainder ? result - remainder : result) : 0;
+ }
+
+ /**
+ * Converts `value` to an integer suitable for use as the length of an
+ * array-like object.
+ *
+ * **Note:** This method is based on
+ * [`ToLength`](http://ecma-international.org/ecma-262/7.0/#sec-tolength).
+ *
+ * @static
+ * @memberOf _
+ * @since 4.0.0
+ * @category Lang
+ * @param {*} value The value to convert.
+ * @returns {number} Returns the converted integer.
+ * @example
+ *
+ * _.toLength(3.2);
+ * // => 3
+ *
+ * _.toLength(Number.MIN_VALUE);
+ * // => 0
+ *
+ * _.toLength(Infinity);
+ * // => 4294967295
+ *
+ * _.toLength('3.2');
+ * // => 3
+ */
+ function toLength(value) {
+ return value ? baseClamp(toInteger(value), 0, MAX_ARRAY_LENGTH) : 0;
+ }
+
+ /**
+ * Converts `value` to a number.
+ *
+ * @static
+ * @memberOf _
+ * @since 4.0.0
+ * @category Lang
+ * @param {*} value The value to process.
+ * @returns {number} Returns the number.
+ * @example
+ *
+ * _.toNumber(3.2);
+ * // => 3.2
+ *
+ * _.toNumber(Number.MIN_VALUE);
+ * // => 5e-324
+ *
+ * _.toNumber(Infinity);
+ * // => Infinity
+ *
+ * _.toNumber('3.2');
+ * // => 3.2
+ */
+ function toNumber(value) {
+ if (typeof value == 'number') {
+ return value;
+ }
+ if (isSymbol(value)) {
+ return NAN;
+ }
+ if (isObject(value)) {
+ var other = typeof value.valueOf == 'function' ? value.valueOf() : value;
+ value = isObject(other) ? (other + '') : other;
+ }
+ if (typeof value != 'string') {
+ return value === 0 ? value : +value;
+ }
+ value = value.replace(reTrim, '');
+ var isBinary = reIsBinary.test(value);
+ return (isBinary || reIsOctal.test(value))
+ ? freeParseInt(value.slice(2), isBinary ? 2 : 8)
+ : (reIsBadHex.test(value) ? NAN : +value);
+ }
+
+ /**
+ * Converts `value` to a plain object flattening inherited enumerable string
+ * keyed properties of `value` to own properties of the plain object.
+ *
+ * @static
+ * @memberOf _
+ * @since 3.0.0
+ * @category Lang
+ * @param {*} value The value to convert.
+ * @returns {Object} Returns the converted plain object.
+ * @example
+ *
+ * function Foo() {
+ * this.b = 2;
+ * }
+ *
+ * Foo.prototype.c = 3;
+ *
+ * _.assign({ 'a': 1 }, new Foo);
+ * // => { 'a': 1, 'b': 2 }
+ *
+ * _.assign({ 'a': 1 }, _.toPlainObject(new Foo));
+ * // => { 'a': 1, 'b': 2, 'c': 3 }
+ */
+ function toPlainObject(value) {
+ return copyObject(value, keysIn(value));
+ }
+
+ /**
+ * Converts `value` to a safe integer. A safe integer can be compared and
+ * represented correctly.
+ *
+ * @static
+ * @memberOf _
+ * @since 4.0.0
+ * @category Lang
+ * @param {*} value The value to convert.
+ * @returns {number} Returns the converted integer.
+ * @example
+ *
+ * _.toSafeInteger(3.2);
+ * // => 3
+ *
+ * _.toSafeInteger(Number.MIN_VALUE);
+ * // => 0
+ *
+ * _.toSafeInteger(Infinity);
+ * // => 9007199254740991
+ *
+ * _.toSafeInteger('3.2');
+ * // => 3
+ */
+ function toSafeInteger(value) {
+ return value
+ ? baseClamp(toInteger(value), -MAX_SAFE_INTEGER, MAX_SAFE_INTEGER)
+ : (value === 0 ? value : 0);
+ }
+
+ /**
+ * Converts `value` to a string. An empty string is returned for `null`
+ * and `undefined` values. The sign of `-0` is preserved.
+ *
+ * @static
+ * @memberOf _
+ * @since 4.0.0
+ * @category Lang
+ * @param {*} value The value to convert.
+ * @returns {string} Returns the converted string.
+ * @example
+ *
+ * _.toString(null);
+ * // => ''
+ *
+ * _.toString(-0);
+ * // => '-0'
+ *
+ * _.toString([1, 2, 3]);
+ * // => '1,2,3'
+ */
+ function toString(value) {
+ return value == null ? '' : baseToString(value);
+ }
+
+ /*------------------------------------------------------------------------*/
+
+ /**
+ * Assigns own enumerable string keyed properties of source objects to the
+ * destination object. Source objects are applied from left to right.
+ * Subsequent sources overwrite property assignments of previous sources.
+ *
+ * **Note:** This method mutates `object` and is loosely based on
+ * [`Object.assign`](https://mdn.io/Object/assign).
+ *
+ * @static
+ * @memberOf _
+ * @since 0.10.0
+ * @category Object
+ * @param {Object} object The destination object.
+ * @param {...Object} [sources] The source objects.
+ * @returns {Object} Returns `object`.
+ * @see _.assignIn
+ * @example
+ *
+ * function Foo() {
+ * this.a = 1;
+ * }
+ *
+ * function Bar() {
+ * this.c = 3;
+ * }
+ *
+ * Foo.prototype.b = 2;
+ * Bar.prototype.d = 4;
+ *
+ * _.assign({ 'a': 0 }, new Foo, new Bar);
+ * // => { 'a': 1, 'c': 3 }
+ */
+ var assign = createAssigner(function(object, source) {
+ if (isPrototype(source) || isArrayLike(source)) {
+ copyObject(source, keys(source), object);
+ return;
+ }
+ for (var key in source) {
+ if (hasOwnProperty.call(source, key)) {
+ assignValue(object, key, source[key]);
+ }
+ }
+ });
+
+ /**
+ * This method is like `_.assign` except that it iterates over own and
+ * inherited source properties.
+ *
+ * **Note:** This method mutates `object`.
+ *
+ * @static
+ * @memberOf _
+ * @since 4.0.0
+ * @alias extend
+ * @category Object
+ * @param {Object} object The destination object.
+ * @param {...Object} [sources] The source objects.
+ * @returns {Object} Returns `object`.
+ * @see _.assign
+ * @example
+ *
+ * function Foo() {
+ * this.a = 1;
+ * }
+ *
+ * function Bar() {
+ * this.c = 3;
+ * }
+ *
+ * Foo.prototype.b = 2;
+ * Bar.prototype.d = 4;
+ *
+ * _.assignIn({ 'a': 0 }, new Foo, new Bar);
+ * // => { 'a': 1, 'b': 2, 'c': 3, 'd': 4 }
+ */
+ var assignIn = createAssigner(function(object, source) {
+ copyObject(source, keysIn(source), object);
+ });
+
+ /**
+ * This method is like `_.assignIn` except that it accepts `customizer`
+ * which is invoked to produce the assigned values. If `customizer` returns
+ * `undefined`, assignment is handled by the method instead. The `customizer`
+ * is invoked with five arguments: (objValue, srcValue, key, object, source).
+ *
+ * **Note:** This method mutates `object`.
+ *
+ * @static
+ * @memberOf _
+ * @since 4.0.0
+ * @alias extendWith
+ * @category Object
+ * @param {Object} object The destination object.
+ * @param {...Object} sources The source objects.
+ * @param {Function} [customizer] The function to customize assigned values.
+ * @returns {Object} Returns `object`.
+ * @see _.assignWith
+ * @example
+ *
+ * function customizer(objValue, srcValue) {
+ * return _.isUndefined(objValue) ? srcValue : objValue;
+ * }
+ *
+ * var defaults = _.partialRight(_.assignInWith, customizer);
+ *
+ * defaults({ 'a': 1 }, { 'b': 2 }, { 'a': 3 });
+ * // => { 'a': 1, 'b': 2 }
+ */
+ var assignInWith = createAssigner(function(object, source, srcIndex, customizer) {
+ copyObject(source, keysIn(source), object, customizer);
+ });
+
+ /**
+ * This method is like `_.assign` except that it accepts `customizer`
+ * which is invoked to produce the assigned values. If `customizer` returns
+ * `undefined`, assignment is handled by the method instead. The `customizer`
+ * is invoked with five arguments: (objValue, srcValue, key, object, source).
+ *
+ * **Note:** This method mutates `object`.
+ *
+ * @static
+ * @memberOf _
+ * @since 4.0.0
+ * @category Object
+ * @param {Object} object The destination object.
+ * @param {...Object} sources The source objects.
+ * @param {Function} [customizer] The function to customize assigned values.
+ * @returns {Object} Returns `object`.
+ * @see _.assignInWith
+ * @example
+ *
+ * function customizer(objValue, srcValue) {
+ * return _.isUndefined(objValue) ? srcValue : objValue;
+ * }
+ *
+ * var defaults = _.partialRight(_.assignWith, customizer);
+ *
+ * defaults({ 'a': 1 }, { 'b': 2 }, { 'a': 3 });
+ * // => { 'a': 1, 'b': 2 }
+ */
+ var assignWith = createAssigner(function(object, source, srcIndex, customizer) {
+ copyObject(source, keys(source), object, customizer);
+ });
+
+ /**
+ * Creates an array of values corresponding to `paths` of `object`.
+ *
+ * @static
+ * @memberOf _
+ * @since 1.0.0
+ * @category Object
+ * @param {Object} object The object to iterate over.
+ * @param {...(string|string[])} [paths] The property paths to pick.
+ * @returns {Array} Returns the picked values.
+ * @example
+ *
+ * var object = { 'a': [{ 'b': { 'c': 3 } }, 4] };
+ *
+ * _.at(object, ['a[0].b.c', 'a[1]']);
+ * // => [3, 4]
+ */
+ var at = flatRest(baseAt);
+
+ /**
+ * Creates an object that inherits from the `prototype` object. If a
+ * `properties` object is given, its own enumerable string keyed properties
+ * are assigned to the created object.
+ *
+ * @static
+ * @memberOf _
+ * @since 2.3.0
+ * @category Object
+ * @param {Object} prototype The object to inherit from.
+ * @param {Object} [properties] The properties to assign to the object.
+ * @returns {Object} Returns the new object.
+ * @example
+ *
+ * function Shape() {
+ * this.x = 0;
+ * this.y = 0;
+ * }
+ *
+ * function Circle() {
+ * Shape.call(this);
+ * }
+ *
+ * Circle.prototype = _.create(Shape.prototype, {
+ * 'constructor': Circle
+ * });
+ *
+ * var circle = new Circle;
+ * circle instanceof Circle;
+ * // => true
+ *
+ * circle instanceof Shape;
+ * // => true
+ */
+ function create(prototype, properties) {
+ var result = baseCreate(prototype);
+ return properties == null ? result : baseAssign(result, properties);
+ }
+
+ /**
+ * Assigns own and inherited enumerable string keyed properties of source
+ * objects to the destination object for all destination properties that
+ * resolve to `undefined`. Source objects are applied from left to right.
+ * Once a property is set, additional values of the same property are ignored.
+ *
+ * **Note:** This method mutates `object`.
+ *
+ * @static
+ * @since 0.1.0
+ * @memberOf _
+ * @category Object
+ * @param {Object} object The destination object.
+ * @param {...Object} [sources] The source objects.
+ * @returns {Object} Returns `object`.
+ * @see _.defaultsDeep
+ * @example
+ *
+ * _.defaults({ 'a': 1 }, { 'b': 2 }, { 'a': 3 });
+ * // => { 'a': 1, 'b': 2 }
+ */
+ var defaults = baseRest(function(args) {
+ args.push(undefined, customDefaultsAssignIn);
+ return apply(assignInWith, undefined, args);
+ });
+
+ /**
+ * This method is like `_.defaults` except that it recursively assigns
+ * default properties.
+ *
+ * **Note:** This method mutates `object`.
+ *
+ * @static
+ * @memberOf _
+ * @since 3.10.0
+ * @category Object
+ * @param {Object} object The destination object.
+ * @param {...Object} [sources] The source objects.
+ * @returns {Object} Returns `object`.
+ * @see _.defaults
+ * @example
+ *
+ * _.defaultsDeep({ 'a': { 'b': 2 } }, { 'a': { 'b': 1, 'c': 3 } });
+ * // => { 'a': { 'b': 2, 'c': 3 } }
+ */
+ var defaultsDeep = baseRest(function(args) {
+ args.push(undefined, customDefaultsMerge);
+ return apply(mergeWith, undefined, args);
+ });
+
+ /**
+ * This method is like `_.find` except that it returns the key of the first
+ * element `predicate` returns truthy for instead of the element itself.
+ *
+ * @static
+ * @memberOf _
+ * @since 1.1.0
+ * @category Object
+ * @param {Object} object The object to inspect.
+ * @param {Function} [predicate=_.identity] The function invoked per iteration.
+ * @returns {string|undefined} Returns the key of the matched element,
+ * else `undefined`.
+ * @example
+ *
+ * var users = {
+ * 'barney': { 'age': 36, 'active': true },
+ * 'fred': { 'age': 40, 'active': false },
+ * 'pebbles': { 'age': 1, 'active': true }
+ * };
+ *
+ * _.findKey(users, function(o) { return o.age < 40; });
+ * // => 'barney' (iteration order is not guaranteed)
+ *
+ * // The `_.matches` iteratee shorthand.
+ * _.findKey(users, { 'age': 1, 'active': true });
+ * // => 'pebbles'
+ *
+ * // The `_.matchesProperty` iteratee shorthand.
+ * _.findKey(users, ['active', false]);
+ * // => 'fred'
+ *
+ * // The `_.property` iteratee shorthand.
+ * _.findKey(users, 'active');
+ * // => 'barney'
+ */
+ function findKey(object, predicate) {
+ return baseFindKey(object, getIteratee(predicate, 3), baseForOwn);
+ }
+
+ /**
+ * This method is like `_.findKey` except that it iterates over elements of
+ * a collection in the opposite order.
+ *
+ * @static
+ * @memberOf _
+ * @since 2.0.0
+ * @category Object
+ * @param {Object} object The object to inspect.
+ * @param {Function} [predicate=_.identity] The function invoked per iteration.
+ * @returns {string|undefined} Returns the key of the matched element,
+ * else `undefined`.
+ * @example
+ *
+ * var users = {
+ * 'barney': { 'age': 36, 'active': true },
+ * 'fred': { 'age': 40, 'active': false },
+ * 'pebbles': { 'age': 1, 'active': true }
+ * };
+ *
+ * _.findLastKey(users, function(o) { return o.age < 40; });
+ * // => returns 'pebbles' assuming `_.findKey` returns 'barney'
+ *
+ * // The `_.matches` iteratee shorthand.
+ * _.findLastKey(users, { 'age': 36, 'active': true });
+ * // => 'barney'
+ *
+ * // The `_.matchesProperty` iteratee shorthand.
+ * _.findLastKey(users, ['active', false]);
+ * // => 'fred'
+ *
+ * // The `_.property` iteratee shorthand.
+ * _.findLastKey(users, 'active');
+ * // => 'pebbles'
+ */
+ function findLastKey(object, predicate) {
+ return baseFindKey(object, getIteratee(predicate, 3), baseForOwnRight);
+ }
+
+ /**
+ * Iterates over own and inherited enumerable string keyed properties of an
+ * object and invokes `iteratee` for each property. The iteratee is invoked
+ * with three arguments: (value, key, object). Iteratee functions may exit
+ * iteration early by explicitly returning `false`.
+ *
+ * @static
+ * @memberOf _
+ * @since 0.3.0
+ * @category Object
+ * @param {Object} object The object to iterate over.
+ * @param {Function} [iteratee=_.identity] The function invoked per iteration.
+ * @returns {Object} Returns `object`.
+ * @see _.forInRight
+ * @example
+ *
+ * function Foo() {
+ * this.a = 1;
+ * this.b = 2;
+ * }
+ *
+ * Foo.prototype.c = 3;
+ *
+ * _.forIn(new Foo, function(value, key) {
+ * console.log(key);
+ * });
+ * // => Logs 'a', 'b', then 'c' (iteration order is not guaranteed).
+ */
+ function forIn(object, iteratee) {
+ return object == null
+ ? object
+ : baseFor(object, getIteratee(iteratee, 3), keysIn);
+ }
+
+ /**
+ * This method is like `_.forIn` except that it iterates over properties of
+ * `object` in the opposite order.
+ *
+ * @static
+ * @memberOf _
+ * @since 2.0.0
+ * @category Object
+ * @param {Object} object The object to iterate over.
+ * @param {Function} [iteratee=_.identity] The function invoked per iteration.
+ * @returns {Object} Returns `object`.
+ * @see _.forIn
+ * @example
+ *
+ * function Foo() {
+ * this.a = 1;
+ * this.b = 2;
+ * }
+ *
+ * Foo.prototype.c = 3;
+ *
+ * _.forInRight(new Foo, function(value, key) {
+ * console.log(key);
+ * });
+ * // => Logs 'c', 'b', then 'a' assuming `_.forIn` logs 'a', 'b', then 'c'.
+ */
+ function forInRight(object, iteratee) {
+ return object == null
+ ? object
+ : baseForRight(object, getIteratee(iteratee, 3), keysIn);
+ }
+
+ /**
+ * Iterates over own enumerable string keyed properties of an object and
+ * invokes `iteratee` for each property. The iteratee is invoked with three
+ * arguments: (value, key, object). Iteratee functions may exit iteration
+ * early by explicitly returning `false`.
+ *
+ * @static
+ * @memberOf _
+ * @since 0.3.0
+ * @category Object
+ * @param {Object} object The object to iterate over.
+ * @param {Function} [iteratee=_.identity] The function invoked per iteration.
+ * @returns {Object} Returns `object`.
+ * @see _.forOwnRight
+ * @example
+ *
+ * function Foo() {
+ * this.a = 1;
+ * this.b = 2;
+ * }
+ *
+ * Foo.prototype.c = 3;
+ *
+ * _.forOwn(new Foo, function(value, key) {
+ * console.log(key);
+ * });
+ * // => Logs 'a' then 'b' (iteration order is not guaranteed).
+ */
+ function forOwn(object, iteratee) {
+ return object && baseForOwn(object, getIteratee(iteratee, 3));
+ }
+
+ /**
+ * This method is like `_.forOwn` except that it iterates over properties of
+ * `object` in the opposite order.
+ *
+ * @static
+ * @memberOf _
+ * @since 2.0.0
+ * @category Object
+ * @param {Object} object The object to iterate over.
+ * @param {Function} [iteratee=_.identity] The function invoked per iteration.
+ * @returns {Object} Returns `object`.
+ * @see _.forOwn
+ * @example
+ *
+ * function Foo() {
+ * this.a = 1;
+ * this.b = 2;
+ * }
+ *
+ * Foo.prototype.c = 3;
+ *
+ * _.forOwnRight(new Foo, function(value, key) {
+ * console.log(key);
+ * });
+ * // => Logs 'b' then 'a' assuming `_.forOwn` logs 'a' then 'b'.
+ */
+ function forOwnRight(object, iteratee) {
+ return object && baseForOwnRight(object, getIteratee(iteratee, 3));
+ }
+
+ /**
+ * Creates an array of function property names from own enumerable properties
+ * of `object`.
+ *
+ * @static
+ * @since 0.1.0
+ * @memberOf _
+ * @category Object
+ * @param {Object} object The object to inspect.
+ * @returns {Array} Returns the function names.
+ * @see _.functionsIn
+ * @example
+ *
+ * function Foo() {
+ * this.a = _.constant('a');
+ * this.b = _.constant('b');
+ * }
+ *
+ * Foo.prototype.c = _.constant('c');
+ *
+ * _.functions(new Foo);
+ * // => ['a', 'b']
+ */
+ function functions(object) {
+ return object == null ? [] : baseFunctions(object, keys(object));
+ }
+
+ /**
+ * Creates an array of function property names from own and inherited
+ * enumerable properties of `object`.
+ *
+ * @static
+ * @memberOf _
+ * @since 4.0.0
+ * @category Object
+ * @param {Object} object The object to inspect.
+ * @returns {Array} Returns the function names.
+ * @see _.functions
+ * @example
+ *
+ * function Foo() {
+ * this.a = _.constant('a');
+ * this.b = _.constant('b');
+ * }
+ *
+ * Foo.prototype.c = _.constant('c');
+ *
+ * _.functionsIn(new Foo);
+ * // => ['a', 'b', 'c']
+ */
+ function functionsIn(object) {
+ return object == null ? [] : baseFunctions(object, keysIn(object));
+ }
+
+ /**
+ * Gets the value at `path` of `object`. If the resolved value is
+ * `undefined`, the `defaultValue` is returned in its place.
+ *
+ * @static
+ * @memberOf _
+ * @since 3.7.0
+ * @category Object
+ * @param {Object} object The object to query.
+ * @param {Array|string} path The path of the property to get.
+ * @param {*} [defaultValue] The value returned for `undefined` resolved values.
+ * @returns {*} Returns the resolved value.
+ * @example
+ *
+ * var object = { 'a': [{ 'b': { 'c': 3 } }] };
+ *
+ * _.get(object, 'a[0].b.c');
+ * // => 3
+ *
+ * _.get(object, ['a', '0', 'b', 'c']);
+ * // => 3
+ *
+ * _.get(object, 'a.b.c', 'default');
+ * // => 'default'
+ */
+ function get(object, path, defaultValue) {
+ var result = object == null ? undefined : baseGet(object, path);
+ return result === undefined ? defaultValue : result;
+ }
+
+ /**
+ * Checks if `path` is a direct property of `object`.
+ *
+ * @static
+ * @since 0.1.0
+ * @memberOf _
+ * @category Object
+ * @param {Object} object The object to query.
+ * @param {Array|string} path The path to check.
+ * @returns {boolean} Returns `true` if `path` exists, else `false`.
+ * @example
+ *
+ * var object = { 'a': { 'b': 2 } };
+ * var other = _.create({ 'a': _.create({ 'b': 2 }) });
+ *
+ * _.has(object, 'a');
+ * // => true
+ *
+ * _.has(object, 'a.b');
+ * // => true
+ *
+ * _.has(object, ['a', 'b']);
+ * // => true
+ *
+ * _.has(other, 'a');
+ * // => false
+ */
+ function has(object, path) {
+ return object != null && hasPath(object, path, baseHas);
+ }
+
+ /**
+ * Checks if `path` is a direct or inherited property of `object`.
+ *
+ * @static
+ * @memberOf _
+ * @since 4.0.0
+ * @category Object
+ * @param {Object} object The object to query.
+ * @param {Array|string} path The path to check.
+ * @returns {boolean} Returns `true` if `path` exists, else `false`.
+ * @example
+ *
+ * var object = _.create({ 'a': _.create({ 'b': 2 }) });
+ *
+ * _.hasIn(object, 'a');
+ * // => true
+ *
+ * _.hasIn(object, 'a.b');
+ * // => true
+ *
+ * _.hasIn(object, ['a', 'b']);
+ * // => true
+ *
+ * _.hasIn(object, 'b');
+ * // => false
+ */
+ function hasIn(object, path) {
+ return object != null && hasPath(object, path, baseHasIn);
+ }
+
+ /**
+ * Creates an object composed of the inverted keys and values of `object`.
+ * If `object` contains duplicate values, subsequent values overwrite
+ * property assignments of previous values.
+ *
+ * @static
+ * @memberOf _
+ * @since 0.7.0
+ * @category Object
+ * @param {Object} object The object to invert.
+ * @returns {Object} Returns the new inverted object.
+ * @example
+ *
+ * var object = { 'a': 1, 'b': 2, 'c': 1 };
+ *
+ * _.invert(object);
+ * // => { '1': 'c', '2': 'b' }
+ */
+ var invert = createInverter(function(result, value, key) {
+ result[value] = key;
+ }, constant(identity));
+
+ /**
+ * This method is like `_.invert` except that the inverted object is generated
+ * from the results of running each element of `object` thru `iteratee`. The
+ * corresponding inverted value of each inverted key is an array of keys
+ * responsible for generating the inverted value. The iteratee is invoked
+ * with one argument: (value).
+ *
+ * @static
+ * @memberOf _
+ * @since 4.1.0
+ * @category Object
+ * @param {Object} object The object to invert.
+ * @param {Function} [iteratee=_.identity] The iteratee invoked per element.
+ * @returns {Object} Returns the new inverted object.
+ * @example
+ *
+ * var object = { 'a': 1, 'b': 2, 'c': 1 };
+ *
+ * _.invertBy(object);
+ * // => { '1': ['a', 'c'], '2': ['b'] }
+ *
+ * _.invertBy(object, function(value) {
+ * return 'group' + value;
+ * });
+ * // => { 'group1': ['a', 'c'], 'group2': ['b'] }
+ */
+ var invertBy = createInverter(function(result, value, key) {
+ if (hasOwnProperty.call(result, value)) {
+ result[value].push(key);
+ } else {
+ result[value] = [key];
+ }
+ }, getIteratee);
+
+ /**
+ * Invokes the method at `path` of `object`.
+ *
+ * @static
+ * @memberOf _
+ * @since 4.0.0
+ * @category Object
+ * @param {Object} object The object to query.
+ * @param {Array|string} path The path of the method to invoke.
+ * @param {...*} [args] The arguments to invoke the method with.
+ * @returns {*} Returns the result of the invoked method.
+ * @example
+ *
+ * var object = { 'a': [{ 'b': { 'c': [1, 2, 3, 4] } }] };
+ *
+ * _.invoke(object, 'a[0].b.c.slice', 1, 3);
+ * // => [2, 3]
+ */
+ var invoke = baseRest(baseInvoke);
+
+ /**
+ * Creates an array of the own enumerable property names of `object`.
+ *
+ * **Note:** Non-object values are coerced to objects. See the
+ * [ES spec](http://ecma-international.org/ecma-262/7.0/#sec-object.keys)
+ * for more details.
+ *
+ * @static
+ * @since 0.1.0
+ * @memberOf _
+ * @category Object
+ * @param {Object} object The object to query.
+ * @returns {Array} Returns the array of property names.
+ * @example
+ *
+ * function Foo() {
+ * this.a = 1;
+ * this.b = 2;
+ * }
+ *
+ * Foo.prototype.c = 3;
+ *
+ * _.keys(new Foo);
+ * // => ['a', 'b'] (iteration order is not guaranteed)
+ *
+ * _.keys('hi');
+ * // => ['0', '1']
+ */
+ function keys(object) {
+ return isArrayLike(object) ? arrayLikeKeys(object) : baseKeys(object);
+ }
+
+ /**
+ * Creates an array of the own and inherited enumerable property names of `object`.
+ *
+ * **Note:** Non-object values are coerced to objects.
+ *
+ * @static
+ * @memberOf _
+ * @since 3.0.0
+ * @category Object
+ * @param {Object} object The object to query.
+ * @returns {Array} Returns the array of property names.
+ * @example
+ *
+ * function Foo() {
+ * this.a = 1;
+ * this.b = 2;
+ * }
+ *
+ * Foo.prototype.c = 3;
+ *
+ * _.keysIn(new Foo);
+ * // => ['a', 'b', 'c'] (iteration order is not guaranteed)
+ */
+ function keysIn(object) {
+ return isArrayLike(object) ? arrayLikeKeys(object, true) : baseKeysIn(object);
+ }
+
+ /**
+ * The opposite of `_.mapValues`; this method creates an object with the
+ * same values as `object` and keys generated by running each own enumerable
+ * string keyed property of `object` thru `iteratee`. The iteratee is invoked
+ * with three arguments: (value, key, object).
+ *
+ * @static
+ * @memberOf _
+ * @since 3.8.0
+ * @category Object
+ * @param {Object} object The object to iterate over.
+ * @param {Function} [iteratee=_.identity] The function invoked per iteration.
+ * @returns {Object} Returns the new mapped object.
+ * @see _.mapValues
+ * @example
+ *
+ * _.mapKeys({ 'a': 1, 'b': 2 }, function(value, key) {
+ * return key + value;
+ * });
+ * // => { 'a1': 1, 'b2': 2 }
+ */
+ function mapKeys(object, iteratee) {
+ var result = {};
+ iteratee = getIteratee(iteratee, 3);
+
+ baseForOwn(object, function(value, key, object) {
+ baseAssignValue(result, iteratee(value, key, object), value);
+ });
+ return result;
+ }
+
+ /**
+ * Creates an object with the same keys as `object` and values generated
+ * by running each own enumerable string keyed property of `object` thru
+ * `iteratee`. The iteratee is invoked with three arguments:
+ * (value, key, object).
+ *
+ * @static
+ * @memberOf _
+ * @since 2.4.0
+ * @category Object
+ * @param {Object} object The object to iterate over.
+ * @param {Function} [iteratee=_.identity] The function invoked per iteration.
+ * @returns {Object} Returns the new mapped object.
+ * @see _.mapKeys
+ * @example
+ *
+ * var users = {
+ * 'fred': { 'user': 'fred', 'age': 40 },
+ * 'pebbles': { 'user': 'pebbles', 'age': 1 }
+ * };
+ *
+ * _.mapValues(users, function(o) { return o.age; });
+ * // => { 'fred': 40, 'pebbles': 1 } (iteration order is not guaranteed)
+ *
+ * // The `_.property` iteratee shorthand.
+ * _.mapValues(users, 'age');
+ * // => { 'fred': 40, 'pebbles': 1 } (iteration order is not guaranteed)
+ */
+ function mapValues(object, iteratee) {
+ var result = {};
+ iteratee = getIteratee(iteratee, 3);
+
+ baseForOwn(object, function(value, key, object) {
+ baseAssignValue(result, key, iteratee(value, key, object));
+ });
+ return result;
+ }
+
+ /**
+ * This method is like `_.assign` except that it recursively merges own and
+ * inherited enumerable string keyed properties of source objects into the
+ * destination object. Source properties that resolve to `undefined` are
+ * skipped if a destination value exists. Array and plain object properties
+ * are merged recursively. Other objects and value types are overridden by
+ * assignment. Source objects are applied from left to right. Subsequent
+ * sources overwrite property assignments of previous sources.
+ *
+ * **Note:** This method mutates `object`.
+ *
+ * @static
+ * @memberOf _
+ * @since 0.5.0
+ * @category Object
+ * @param {Object} object The destination object.
+ * @param {...Object} [sources] The source objects.
+ * @returns {Object} Returns `object`.
+ * @example
+ *
+ * var object = {
+ * 'a': [{ 'b': 2 }, { 'd': 4 }]
+ * };
+ *
+ * var other = {
+ * 'a': [{ 'c': 3 }, { 'e': 5 }]
+ * };
+ *
+ * _.merge(object, other);
+ * // => { 'a': [{ 'b': 2, 'c': 3 }, { 'd': 4, 'e': 5 }] }
+ */
+ var merge = createAssigner(function(object, source, srcIndex) {
+ baseMerge(object, source, srcIndex);
+ });
+
+ /**
+ * This method is like `_.merge` except that it accepts `customizer` which
+ * is invoked to produce the merged values of the destination and source
+ * properties. If `customizer` returns `undefined`, merging is handled by the
+ * method instead. The `customizer` is invoked with six arguments:
+ * (objValue, srcValue, key, object, source, stack).
+ *
+ * **Note:** This method mutates `object`.
+ *
+ * @static
+ * @memberOf _
+ * @since 4.0.0
+ * @category Object
+ * @param {Object} object The destination object.
+ * @param {...Object} sources The source objects.
+ * @param {Function} customizer The function to customize assigned values.
+ * @returns {Object} Returns `object`.
+ * @example
+ *
+ * function customizer(objValue, srcValue) {
+ * if (_.isArray(objValue)) {
+ * return objValue.concat(srcValue);
+ * }
+ * }
+ *
+ * var object = { 'a': [1], 'b': [2] };
+ * var other = { 'a': [3], 'b': [4] };
+ *
+ * _.mergeWith(object, other, customizer);
+ * // => { 'a': [1, 3], 'b': [2, 4] }
+ */
+ var mergeWith = createAssigner(function(object, source, srcIndex, customizer) {
+ baseMerge(object, source, srcIndex, customizer);
+ });
+
+ /**
+ * The opposite of `_.pick`; this method creates an object composed of the
+ * own and inherited enumerable property paths of `object` that are not omitted.
+ *
+ * **Note:** This method is considerably slower than `_.pick`.
+ *
+ * @static
+ * @since 0.1.0
+ * @memberOf _
+ * @category Object
+ * @param {Object} object The source object.
+ * @param {...(string|string[])} [paths] The property paths to omit.
+ * @returns {Object} Returns the new object.
+ * @example
+ *
+ * var object = { 'a': 1, 'b': '2', 'c': 3 };
+ *
+ * _.omit(object, ['a', 'c']);
+ * // => { 'b': '2' }
+ */
+ var omit = flatRest(function(object, paths) {
+ var result = {};
+ if (object == null) {
+ return result;
+ }
+ var isDeep = false;
+ paths = arrayMap(paths, function(path) {
+ path = castPath(path, object);
+ isDeep || (isDeep = path.length > 1);
+ return path;
+ });
+ copyObject(object, getAllKeysIn(object), result);
+ if (isDeep) {
+ result = baseClone(result, CLONE_DEEP_FLAG | CLONE_FLAT_FLAG | CLONE_SYMBOLS_FLAG, customOmitClone);
+ }
+ var length = paths.length;
+ while (length--) {
+ baseUnset(result, paths[length]);
+ }
+ return result;
+ });
+
+ /**
+ * The opposite of `_.pickBy`; this method creates an object composed of
+ * the own and inherited enumerable string keyed properties of `object` that
+ * `predicate` doesn't return truthy for. The predicate is invoked with two
+ * arguments: (value, key).
+ *
+ * @static
+ * @memberOf _
+ * @since 4.0.0
+ * @category Object
+ * @param {Object} object The source object.
+ * @param {Function} [predicate=_.identity] The function invoked per property.
+ * @returns {Object} Returns the new object.
+ * @example
+ *
+ * var object = { 'a': 1, 'b': '2', 'c': 3 };
+ *
+ * _.omitBy(object, _.isNumber);
+ * // => { 'b': '2' }
+ */
+ function omitBy(object, predicate) {
+ return pickBy(object, negate(getIteratee(predicate)));
+ }
+
+ /**
+ * Creates an object composed of the picked `object` properties.
+ *
+ * @static
+ * @since 0.1.0
+ * @memberOf _
+ * @category Object
+ * @param {Object} object The source object.
+ * @param {...(string|string[])} [paths] The property paths to pick.
+ * @returns {Object} Returns the new object.
+ * @example
+ *
+ * var object = { 'a': 1, 'b': '2', 'c': 3 };
+ *
+ * _.pick(object, ['a', 'c']);
+ * // => { 'a': 1, 'c': 3 }
+ */
+ var pick = flatRest(function(object, paths) {
+ return object == null ? {} : basePick(object, paths);
+ });
+
+ /**
+ * Creates an object composed of the `object` properties `predicate` returns
+ * truthy for. The predicate is invoked with two arguments: (value, key).
+ *
+ * @static
+ * @memberOf _
+ * @since 4.0.0
+ * @category Object
+ * @param {Object} object The source object.
+ * @param {Function} [predicate=_.identity] The function invoked per property.
+ * @returns {Object} Returns the new object.
+ * @example
+ *
+ * var object = { 'a': 1, 'b': '2', 'c': 3 };
+ *
+ * _.pickBy(object, _.isNumber);
+ * // => { 'a': 1, 'c': 3 }
+ */
+ function pickBy(object, predicate) {
+ if (object == null) {
+ return {};
+ }
+ var props = arrayMap(getAllKeysIn(object), function(prop) {
+ return [prop];
+ });
+ predicate = getIteratee(predicate);
+ return basePickBy(object, props, function(value, path) {
+ return predicate(value, path[0]);
+ });
+ }
+
+ /**
+ * This method is like `_.get` except that if the resolved value is a
+ * function it's invoked with the `this` binding of its parent object and
+ * its result is returned.
+ *
+ * @static
+ * @since 0.1.0
+ * @memberOf _
+ * @category Object
+ * @param {Object} object The object to query.
+ * @param {Array|string} path The path of the property to resolve.
+ * @param {*} [defaultValue] The value returned for `undefined` resolved values.
+ * @returns {*} Returns the resolved value.
+ * @example
+ *
+ * var object = { 'a': [{ 'b': { 'c1': 3, 'c2': _.constant(4) } }] };
+ *
+ * _.result(object, 'a[0].b.c1');
+ * // => 3
+ *
+ * _.result(object, 'a[0].b.c2');
+ * // => 4
+ *
+ * _.result(object, 'a[0].b.c3', 'default');
+ * // => 'default'
+ *
+ * _.result(object, 'a[0].b.c3', _.constant('default'));
+ * // => 'default'
+ */
+ function result(object, path, defaultValue) {
+ path = castPath(path, object);
+
+ var index = -1,
+ length = path.length;
+
+ // Ensure the loop is entered when path is empty.
+ if (!length) {
+ length = 1;
+ object = undefined;
+ }
+ while (++index < length) {
+ var value = object == null ? undefined : object[toKey(path[index])];
+ if (value === undefined) {
+ index = length;
+ value = defaultValue;
+ }
+ object = isFunction(value) ? value.call(object) : value;
+ }
+ return object;
+ }
+
+ /**
+ * Sets the value at `path` of `object`. If a portion of `path` doesn't exist,
+ * it's created. Arrays are created for missing index properties while objects
+ * are created for all other missing properties. Use `_.setWith` to customize
+ * `path` creation.
+ *
+ * **Note:** This method mutates `object`.
+ *
+ * @static
+ * @memberOf _
+ * @since 3.7.0
+ * @category Object
+ * @param {Object} object The object to modify.
+ * @param {Array|string} path The path of the property to set.
+ * @param {*} value The value to set.
+ * @returns {Object} Returns `object`.
+ * @example
+ *
+ * var object = { 'a': [{ 'b': { 'c': 3 } }] };
+ *
+ * _.set(object, 'a[0].b.c', 4);
+ * console.log(object.a[0].b.c);
+ * // => 4
+ *
+ * _.set(object, ['x', '0', 'y', 'z'], 5);
+ * console.log(object.x[0].y.z);
+ * // => 5
+ */
+ function set(object, path, value) {
+ return object == null ? object : baseSet(object, path, value);
+ }
+
+ /**
+ * This method is like `_.set` except that it accepts `customizer` which is
+ * invoked to produce the objects of `path`. If `customizer` returns `undefined`
+ * path creation is handled by the method instead. The `customizer` is invoked
+ * with three arguments: (nsValue, key, nsObject).
+ *
+ * **Note:** This method mutates `object`.
+ *
+ * @static
+ * @memberOf _
+ * @since 4.0.0
+ * @category Object
+ * @param {Object} object The object to modify.
+ * @param {Array|string} path The path of the property to set.
+ * @param {*} value The value to set.
+ * @param {Function} [customizer] The function to customize assigned values.
+ * @returns {Object} Returns `object`.
+ * @example
+ *
+ * var object = {};
+ *
+ * _.setWith(object, '[0][1]', 'a', Object);
+ * // => { '0': { '1': 'a' } }
+ */
+ function setWith(object, path, value, customizer) {
+ customizer = typeof customizer == 'function' ? customizer : undefined;
+ return object == null ? object : baseSet(object, path, value, customizer);
+ }
+
+ /**
+ * Creates an array of own enumerable string keyed-value pairs for `object`
+ * which can be consumed by `_.fromPairs`. If `object` is a map or set, its
+ * entries are returned.
+ *
+ * @static
+ * @memberOf _
+ * @since 4.0.0
+ * @alias entries
+ * @category Object
+ * @param {Object} object The object to query.
+ * @returns {Array} Returns the key-value pairs.
+ * @example
+ *
+ * function Foo() {
+ * this.a = 1;
+ * this.b = 2;
+ * }
+ *
+ * Foo.prototype.c = 3;
+ *
+ * _.toPairs(new Foo);
+ * // => [['a', 1], ['b', 2]] (iteration order is not guaranteed)
+ */
+ var toPairs = createToPairs(keys);
+
+ /**
+ * Creates an array of own and inherited enumerable string keyed-value pairs
+ * for `object` which can be consumed by `_.fromPairs`. If `object` is a map
+ * or set, its entries are returned.
+ *
+ * @static
+ * @memberOf _
+ * @since 4.0.0
+ * @alias entriesIn
+ * @category Object
+ * @param {Object} object The object to query.
+ * @returns {Array} Returns the key-value pairs.
+ * @example
+ *
+ * function Foo() {
+ * this.a = 1;
+ * this.b = 2;
+ * }
+ *
+ * Foo.prototype.c = 3;
+ *
+ * _.toPairsIn(new Foo);
+ * // => [['a', 1], ['b', 2], ['c', 3]] (iteration order is not guaranteed)
+ */
+ var toPairsIn = createToPairs(keysIn);
+
+ /**
+ * An alternative to `_.reduce`; this method transforms `object` to a new
+ * `accumulator` object which is the result of running each of its own
+ * enumerable string keyed properties thru `iteratee`, with each invocation
+ * potentially mutating the `accumulator` object. If `accumulator` is not
+ * provided, a new object with the same `[[Prototype]]` will be used. The
+ * iteratee is invoked with four arguments: (accumulator, value, key, object).
+ * Iteratee functions may exit iteration early by explicitly returning `false`.
+ *
+ * @static
+ * @memberOf _
+ * @since 1.3.0
+ * @category Object
+ * @param {Object} object The object to iterate over.
+ * @param {Function} [iteratee=_.identity] The function invoked per iteration.
+ * @param {*} [accumulator] The custom accumulator value.
+ * @returns {*} Returns the accumulated value.
+ * @example
+ *
+ * _.transform([2, 3, 4], function(result, n) {
+ * result.push(n *= n);
+ * return n % 2 == 0;
+ * }, []);
+ * // => [4, 9]
+ *
+ * _.transform({ 'a': 1, 'b': 2, 'c': 1 }, function(result, value, key) {
+ * (result[value] || (result[value] = [])).push(key);
+ * }, {});
+ * // => { '1': ['a', 'c'], '2': ['b'] }
+ */
+ function transform(object, iteratee, accumulator) {
+ var isArr = isArray(object),
+ isArrLike = isArr || isBuffer(object) || isTypedArray(object);
+
+ iteratee = getIteratee(iteratee, 4);
+ if (accumulator == null) {
+ var Ctor = object && object.constructor;
+ if (isArrLike) {
+ accumulator = isArr ? new Ctor : [];
+ }
+ else if (isObject(object)) {
+ accumulator = isFunction(Ctor) ? baseCreate(getPrototype(object)) : {};
+ }
+ else {
+ accumulator = {};
+ }
+ }
+ (isArrLike ? arrayEach : baseForOwn)(object, function(value, index, object) {
+ return iteratee(accumulator, value, index, object);
+ });
+ return accumulator;
+ }
+
+ /**
+ * Removes the property at `path` of `object`.
+ *
+ * **Note:** This method mutates `object`.
+ *
+ * @static
+ * @memberOf _
+ * @since 4.0.0
+ * @category Object
+ * @param {Object} object The object to modify.
+ * @param {Array|string} path The path of the property to unset.
+ * @returns {boolean} Returns `true` if the property is deleted, else `false`.
+ * @example
+ *
+ * var object = { 'a': [{ 'b': { 'c': 7 } }] };
+ * _.unset(object, 'a[0].b.c');
+ * // => true
+ *
+ * console.log(object);
+ * // => { 'a': [{ 'b': {} }] };
+ *
+ * _.unset(object, ['a', '0', 'b', 'c']);
+ * // => true
+ *
+ * console.log(object);
+ * // => { 'a': [{ 'b': {} }] };
+ */
+ function unset(object, path) {
+ return object == null ? true : baseUnset(object, path);
+ }
+
+ /**
+ * This method is like `_.set` except that accepts `updater` to produce the
+ * value to set. Use `_.updateWith` to customize `path` creation. The `updater`
+ * is invoked with one argument: (value).
+ *
+ * **Note:** This method mutates `object`.
+ *
+ * @static
+ * @memberOf _
+ * @since 4.6.0
+ * @category Object
+ * @param {Object} object The object to modify.
+ * @param {Array|string} path The path of the property to set.
+ * @param {Function} updater The function to produce the updated value.
+ * @returns {Object} Returns `object`.
+ * @example
+ *
+ * var object = { 'a': [{ 'b': { 'c': 3 } }] };
+ *
+ * _.update(object, 'a[0].b.c', function(n) { return n * n; });
+ * console.log(object.a[0].b.c);
+ * // => 9
+ *
+ * _.update(object, 'x[0].y.z', function(n) { return n ? n + 1 : 0; });
+ * console.log(object.x[0].y.z);
+ * // => 0
+ */
+ function update(object, path, updater) {
+ return object == null ? object : baseUpdate(object, path, castFunction(updater));
+ }
+
+ /**
+ * This method is like `_.update` except that it accepts `customizer` which is
+ * invoked to produce the objects of `path`. If `customizer` returns `undefined`
+ * path creation is handled by the method instead. The `customizer` is invoked
+ * with three arguments: (nsValue, key, nsObject).
+ *
+ * **Note:** This method mutates `object`.
+ *
+ * @static
+ * @memberOf _
+ * @since 4.6.0
+ * @category Object
+ * @param {Object} object The object to modify.
+ * @param {Array|string} path The path of the property to set.
+ * @param {Function} updater The function to produce the updated value.
+ * @param {Function} [customizer] The function to customize assigned values.
+ * @returns {Object} Returns `object`.
+ * @example
+ *
+ * var object = {};
+ *
+ * _.updateWith(object, '[0][1]', _.constant('a'), Object);
+ * // => { '0': { '1': 'a' } }
+ */
+ function updateWith(object, path, updater, customizer) {
+ customizer = typeof customizer == 'function' ? customizer : undefined;
+ return object == null ? object : baseUpdate(object, path, castFunction(updater), customizer);
+ }
+
+ /**
+ * Creates an array of the own enumerable string keyed property values of `object`.
+ *
+ * **Note:** Non-object values are coerced to objects.
+ *
+ * @static
+ * @since 0.1.0
+ * @memberOf _
+ * @category Object
+ * @param {Object} object The object to query.
+ * @returns {Array} Returns the array of property values.
+ * @example
+ *
+ * function Foo() {
+ * this.a = 1;
+ * this.b = 2;
+ * }
+ *
+ * Foo.prototype.c = 3;
+ *
+ * _.values(new Foo);
+ * // => [1, 2] (iteration order is not guaranteed)
+ *
+ * _.values('hi');
+ * // => ['h', 'i']
+ */
+ function values(object) {
+ return object == null ? [] : baseValues(object, keys(object));
+ }
+
+ /**
+ * Creates an array of the own and inherited enumerable string keyed property
+ * values of `object`.
+ *
+ * **Note:** Non-object values are coerced to objects.
+ *
+ * @static
+ * @memberOf _
+ * @since 3.0.0
+ * @category Object
+ * @param {Object} object The object to query.
+ * @returns {Array} Returns the array of property values.
+ * @example
+ *
+ * function Foo() {
+ * this.a = 1;
+ * this.b = 2;
+ * }
+ *
+ * Foo.prototype.c = 3;
+ *
+ * _.valuesIn(new Foo);
+ * // => [1, 2, 3] (iteration order is not guaranteed)
+ */
+ function valuesIn(object) {
+ return object == null ? [] : baseValues(object, keysIn(object));
+ }
+
+ /*------------------------------------------------------------------------*/
+
+ /**
+ * Clamps `number` within the inclusive `lower` and `upper` bounds.
+ *
+ * @static
+ * @memberOf _
+ * @since 4.0.0
+ * @category Number
+ * @param {number} number The number to clamp.
+ * @param {number} [lower] The lower bound.
+ * @param {number} upper The upper bound.
+ * @returns {number} Returns the clamped number.
+ * @example
+ *
+ * _.clamp(-10, -5, 5);
+ * // => -5
+ *
+ * _.clamp(10, -5, 5);
+ * // => 5
+ */
+ function clamp(number, lower, upper) {
+ if (upper === undefined) {
+ upper = lower;
+ lower = undefined;
+ }
+ if (upper !== undefined) {
+ upper = toNumber(upper);
+ upper = upper === upper ? upper : 0;
+ }
+ if (lower !== undefined) {
+ lower = toNumber(lower);
+ lower = lower === lower ? lower : 0;
+ }
+ return baseClamp(toNumber(number), lower, upper);
+ }
+
+ /**
+ * Checks if `n` is between `start` and up to, but not including, `end`. If
+ * `end` is not specified, it's set to `start` with `start` then set to `0`.
+ * If `start` is greater than `end` the params are swapped to support
+ * negative ranges.
+ *
+ * @static
+ * @memberOf _
+ * @since 3.3.0
+ * @category Number
+ * @param {number} number The number to check.
+ * @param {number} [start=0] The start of the range.
+ * @param {number} end The end of the range.
+ * @returns {boolean} Returns `true` if `number` is in the range, else `false`.
+ * @see _.range, _.rangeRight
+ * @example
+ *
+ * _.inRange(3, 2, 4);
+ * // => true
+ *
+ * _.inRange(4, 8);
+ * // => true
+ *
+ * _.inRange(4, 2);
+ * // => false
+ *
+ * _.inRange(2, 2);
+ * // => false
+ *
+ * _.inRange(1.2, 2);
+ * // => true
+ *
+ * _.inRange(5.2, 4);
+ * // => false
+ *
+ * _.inRange(-3, -2, -6);
+ * // => true
+ */
+ function inRange(number, start, end) {
+ start = toFinite(start);
+ if (end === undefined) {
+ end = start;
+ start = 0;
+ } else {
+ end = toFinite(end);
+ }
+ number = toNumber(number);
+ return baseInRange(number, start, end);
+ }
+
+ /**
+ * Produces a random number between the inclusive `lower` and `upper` bounds.
+ * If only one argument is provided a number between `0` and the given number
+ * is returned. If `floating` is `true`, or either `lower` or `upper` are
+ * floats, a floating-point number is returned instead of an integer.
+ *
+ * **Note:** JavaScript follows the IEEE-754 standard for resolving
+ * floating-point values which can produce unexpected results.
+ *
+ * @static
+ * @memberOf _
+ * @since 0.7.0
+ * @category Number
+ * @param {number} [lower=0] The lower bound.
+ * @param {number} [upper=1] The upper bound.
+ * @param {boolean} [floating] Specify returning a floating-point number.
+ * @returns {number} Returns the random number.
+ * @example
+ *
+ * _.random(0, 5);
+ * // => an integer between 0 and 5
+ *
+ * _.random(5);
+ * // => also an integer between 0 and 5
+ *
+ * _.random(5, true);
+ * // => a floating-point number between 0 and 5
+ *
+ * _.random(1.2, 5.2);
+ * // => a floating-point number between 1.2 and 5.2
+ */
+ function random(lower, upper, floating) {
+ if (floating && typeof floating != 'boolean' && isIterateeCall(lower, upper, floating)) {
+ upper = floating = undefined;
+ }
+ if (floating === undefined) {
+ if (typeof upper == 'boolean') {
+ floating = upper;
+ upper = undefined;
+ }
+ else if (typeof lower == 'boolean') {
+ floating = lower;
+ lower = undefined;
+ }
+ }
+ if (lower === undefined && upper === undefined) {
+ lower = 0;
+ upper = 1;
+ }
+ else {
+ lower = toFinite(lower);
+ if (upper === undefined) {
+ upper = lower;
+ lower = 0;
+ } else {
+ upper = toFinite(upper);
+ }
+ }
+ if (lower > upper) {
+ var temp = lower;
+ lower = upper;
+ upper = temp;
+ }
+ if (floating || lower % 1 || upper % 1) {
+ var rand = nativeRandom();
+ return nativeMin(lower + (rand * (upper - lower + freeParseFloat('1e-' + ((rand + '').length - 1)))), upper);
+ }
+ return baseRandom(lower, upper);
+ }
+
+ /*------------------------------------------------------------------------*/
+
+ /**
+ * Converts `string` to [camel case](https://en.wikipedia.org/wiki/CamelCase).
+ *
+ * @static
+ * @memberOf _
+ * @since 3.0.0
+ * @category String
+ * @param {string} [string=''] The string to convert.
+ * @returns {string} Returns the camel cased string.
+ * @example
+ *
+ * _.camelCase('Foo Bar');
+ * // => 'fooBar'
+ *
+ * _.camelCase('--foo-bar--');
+ * // => 'fooBar'
+ *
+ * _.camelCase('__FOO_BAR__');
+ * // => 'fooBar'
+ */
+ var camelCase = createCompounder(function(result, word, index) {
+ word = word.toLowerCase();
+ return result + (index ? capitalize(word) : word);
+ });
+
+ /**
+ * Converts the first character of `string` to upper case and the remaining
+ * to lower case.
+ *
+ * @static
+ * @memberOf _
+ * @since 3.0.0
+ * @category String
+ * @param {string} [string=''] The string to capitalize.
+ * @returns {string} Returns the capitalized string.
+ * @example
+ *
+ * _.capitalize('FRED');
+ * // => 'Fred'
+ */
+ function capitalize(string) {
+ return upperFirst(toString(string).toLowerCase());
+ }
+
+ /**
+ * Deburrs `string` by converting
+ * [Latin-1 Supplement](https://en.wikipedia.org/wiki/Latin-1_Supplement_(Unicode_block)#Character_table)
+ * and [Latin Extended-A](https://en.wikipedia.org/wiki/Latin_Extended-A)
+ * letters to basic Latin letters and removing
+ * [combining diacritical marks](https://en.wikipedia.org/wiki/Combining_Diacritical_Marks).
+ *
+ * @static
+ * @memberOf _
+ * @since 3.0.0
+ * @category String
+ * @param {string} [string=''] The string to deburr.
+ * @returns {string} Returns the deburred string.
+ * @example
+ *
+ * _.deburr('déjà vu');
+ * // => 'deja vu'
+ */
+ function deburr(string) {
+ string = toString(string);
+ return string && string.replace(reLatin, deburrLetter).replace(reComboMark, '');
+ }
+
+ /**
+ * Checks if `string` ends with the given target string.
+ *
+ * @static
+ * @memberOf _
+ * @since 3.0.0
+ * @category String
+ * @param {string} [string=''] The string to inspect.
+ * @param {string} [target] The string to search for.
+ * @param {number} [position=string.length] The position to search up to.
+ * @returns {boolean} Returns `true` if `string` ends with `target`,
+ * else `false`.
+ * @example
+ *
+ * _.endsWith('abc', 'c');
+ * // => true
+ *
+ * _.endsWith('abc', 'b');
+ * // => false
+ *
+ * _.endsWith('abc', 'b', 2);
+ * // => true
+ */
+ function endsWith(string, target, position) {
+ string = toString(string);
+ target = baseToString(target);
+
+ var length = string.length;
+ position = position === undefined
+ ? length
+ : baseClamp(toInteger(position), 0, length);
+
+ var end = position;
+ position -= target.length;
+ return position >= 0 && string.slice(position, end) == target;
+ }
+
+ /**
+ * Converts the characters "&", "<", ">", '"', and "'" in `string` to their
+ * corresponding HTML entities.
+ *
+ * **Note:** No other characters are escaped. To escape additional
+ * characters use a third-party library like [_he_](https://mths.be/he).
+ *
+ * Though the ">" character is escaped for symmetry, characters like
+ * ">" and "/" don't need escaping in HTML and have no special meaning
+ * unless they're part of a tag or unquoted attribute value. See
+ * [Mathias Bynens's article](https://mathiasbynens.be/notes/ambiguous-ampersands)
+ * (under "semi-related fun fact") for more details.
+ *
+ * When working with HTML you should always
+ * [quote attribute values](http://wonko.com/post/html-escaping) to reduce
+ * XSS vectors.
+ *
+ * @static
+ * @since 0.1.0
+ * @memberOf _
+ * @category String
+ * @param {string} [string=''] The string to escape.
+ * @returns {string} Returns the escaped string.
+ * @example
+ *
+ * _.escape('fred, barney, & pebbles');
+ * // => 'fred, barney, & pebbles'
+ */
+ function escape(string) {
+ string = toString(string);
+ return (string && reHasUnescapedHtml.test(string))
+ ? string.replace(reUnescapedHtml, escapeHtmlChar)
+ : string;
+ }
+
+ /**
+ * Escapes the `RegExp` special characters "^", "$", "\", ".", "*", "+",
+ * "?", "(", ")", "[", "]", "{", "}", and "|" in `string`.
+ *
+ * @static
+ * @memberOf _
+ * @since 3.0.0
+ * @category String
+ * @param {string} [string=''] The string to escape.
+ * @returns {string} Returns the escaped string.
+ * @example
+ *
+ * _.escapeRegExp('[lodash](https://lodash.com/)');
+ * // => '\[lodash\]\(https://lodash\.com/\)'
+ */
+ function escapeRegExp(string) {
+ string = toString(string);
+ return (string && reHasRegExpChar.test(string))
+ ? string.replace(reRegExpChar, '\\$&')
+ : string;
+ }
+
+ /**
+ * Converts `string` to
+ * [kebab case](https://en.wikipedia.org/wiki/Letter_case#Special_case_styles).
+ *
+ * @static
+ * @memberOf _
+ * @since 3.0.0
+ * @category String
+ * @param {string} [string=''] The string to convert.
+ * @returns {string} Returns the kebab cased string.
+ * @example
+ *
+ * _.kebabCase('Foo Bar');
+ * // => 'foo-bar'
+ *
+ * _.kebabCase('fooBar');
+ * // => 'foo-bar'
+ *
+ * _.kebabCase('__FOO_BAR__');
+ * // => 'foo-bar'
+ */
+ var kebabCase = createCompounder(function(result, word, index) {
+ return result + (index ? '-' : '') + word.toLowerCase();
+ });
+
+ /**
+ * Converts `string`, as space separated words, to lower case.
+ *
+ * @static
+ * @memberOf _
+ * @since 4.0.0
+ * @category String
+ * @param {string} [string=''] The string to convert.
+ * @returns {string} Returns the lower cased string.
+ * @example
+ *
+ * _.lowerCase('--Foo-Bar--');
+ * // => 'foo bar'
+ *
+ * _.lowerCase('fooBar');
+ * // => 'foo bar'
+ *
+ * _.lowerCase('__FOO_BAR__');
+ * // => 'foo bar'
+ */
+ var lowerCase = createCompounder(function(result, word, index) {
+ return result + (index ? ' ' : '') + word.toLowerCase();
+ });
+
+ /**
+ * Converts the first character of `string` to lower case.
+ *
+ * @static
+ * @memberOf _
+ * @since 4.0.0
+ * @category String
+ * @param {string} [string=''] The string to convert.
+ * @returns {string} Returns the converted string.
+ * @example
+ *
+ * _.lowerFirst('Fred');
+ * // => 'fred'
+ *
+ * _.lowerFirst('FRED');
+ * // => 'fRED'
+ */
+ var lowerFirst = createCaseFirst('toLowerCase');
+
+ /**
+ * Pads `string` on the left and right sides if it's shorter than `length`.
+ * Padding characters are truncated if they can't be evenly divided by `length`.
+ *
+ * @static
+ * @memberOf _
+ * @since 3.0.0
+ * @category String
+ * @param {string} [string=''] The string to pad.
+ * @param {number} [length=0] The padding length.
+ * @param {string} [chars=' '] The string used as padding.
+ * @returns {string} Returns the padded string.
+ * @example
+ *
+ * _.pad('abc', 8);
+ * // => ' abc '
+ *
+ * _.pad('abc', 8, '_-');
+ * // => '_-abc_-_'
+ *
+ * _.pad('abc', 3);
+ * // => 'abc'
+ */
+ function pad(string, length, chars) {
+ string = toString(string);
+ length = toInteger(length);
+
+ var strLength = length ? stringSize(string) : 0;
+ if (!length || strLength >= length) {
+ return string;
+ }
+ var mid = (length - strLength) / 2;
+ return (
+ createPadding(nativeFloor(mid), chars) +
+ string +
+ createPadding(nativeCeil(mid), chars)
+ );
+ }
+
+ /**
+ * Pads `string` on the right side if it's shorter than `length`. Padding
+ * characters are truncated if they exceed `length`.
+ *
+ * @static
+ * @memberOf _
+ * @since 4.0.0
+ * @category String
+ * @param {string} [string=''] The string to pad.
+ * @param {number} [length=0] The padding length.
+ * @param {string} [chars=' '] The string used as padding.
+ * @returns {string} Returns the padded string.
+ * @example
+ *
+ * _.padEnd('abc', 6);
+ * // => 'abc '
+ *
+ * _.padEnd('abc', 6, '_-');
+ * // => 'abc_-_'
+ *
+ * _.padEnd('abc', 3);
+ * // => 'abc'
+ */
+ function padEnd(string, length, chars) {
+ string = toString(string);
+ length = toInteger(length);
+
+ var strLength = length ? stringSize(string) : 0;
+ return (length && strLength < length)
+ ? (string + createPadding(length - strLength, chars))
+ : string;
+ }
+
+ /**
+ * Pads `string` on the left side if it's shorter than `length`. Padding
+ * characters are truncated if they exceed `length`.
+ *
+ * @static
+ * @memberOf _
+ * @since 4.0.0
+ * @category String
+ * @param {string} [string=''] The string to pad.
+ * @param {number} [length=0] The padding length.
+ * @param {string} [chars=' '] The string used as padding.
+ * @returns {string} Returns the padded string.
+ * @example
+ *
+ * _.padStart('abc', 6);
+ * // => ' abc'
+ *
+ * _.padStart('abc', 6, '_-');
+ * // => '_-_abc'
+ *
+ * _.padStart('abc', 3);
+ * // => 'abc'
+ */
+ function padStart(string, length, chars) {
+ string = toString(string);
+ length = toInteger(length);
+
+ var strLength = length ? stringSize(string) : 0;
+ return (length && strLength < length)
+ ? (createPadding(length - strLength, chars) + string)
+ : string;
+ }
+
+ /**
+ * Converts `string` to an integer of the specified radix. If `radix` is
+ * `undefined` or `0`, a `radix` of `10` is used unless `value` is a
+ * hexadecimal, in which case a `radix` of `16` is used.
+ *
+ * **Note:** This method aligns with the
+ * [ES5 implementation](https://es5.github.io/#x15.1.2.2) of `parseInt`.
+ *
+ * @static
+ * @memberOf _
+ * @since 1.1.0
+ * @category String
+ * @param {string} string The string to convert.
+ * @param {number} [radix=10] The radix to interpret `value` by.
+ * @param- {Object} [guard] Enables use as an iteratee for methods like `_.map`.
+ * @returns {number} Returns the converted integer.
+ * @example
+ *
+ * _.parseInt('08');
+ * // => 8
+ *
+ * _.map(['6', '08', '10'], _.parseInt);
+ * // => [6, 8, 10]
+ */
+ function parseInt(string, radix, guard) {
+ if (guard || radix == null) {
+ radix = 0;
+ } else if (radix) {
+ radix = +radix;
+ }
+ return nativeParseInt(toString(string).replace(reTrimStart, ''), radix || 0);
+ }
+
+ /**
+ * Repeats the given string `n` times.
+ *
+ * @static
+ * @memberOf _
+ * @since 3.0.0
+ * @category String
+ * @param {string} [string=''] The string to repeat.
+ * @param {number} [n=1] The number of times to repeat the string.
+ * @param- {Object} [guard] Enables use as an iteratee for methods like `_.map`.
+ * @returns {string} Returns the repeated string.
+ * @example
+ *
+ * _.repeat('*', 3);
+ * // => '***'
+ *
+ * _.repeat('abc', 2);
+ * // => 'abcabc'
+ *
+ * _.repeat('abc', 0);
+ * // => ''
+ */
+ function repeat(string, n, guard) {
+ if ((guard ? isIterateeCall(string, n, guard) : n === undefined)) {
+ n = 1;
+ } else {
+ n = toInteger(n);
+ }
+ return baseRepeat(toString(string), n);
+ }
+
+ /**
+ * Replaces matches for `pattern` in `string` with `replacement`.
+ *
+ * **Note:** This method is based on
+ * [`String#replace`](https://mdn.io/String/replace).
+ *
+ * @static
+ * @memberOf _
+ * @since 4.0.0
+ * @category String
+ * @param {string} [string=''] The string to modify.
+ * @param {RegExp|string} pattern The pattern to replace.
+ * @param {Function|string} replacement The match replacement.
+ * @returns {string} Returns the modified string.
+ * @example
+ *
+ * _.replace('Hi Fred', 'Fred', 'Barney');
+ * // => 'Hi Barney'
+ */
+ function replace() {
+ var args = arguments,
+ string = toString(args[0]);
+
+ return args.length < 3 ? string : string.replace(args[1], args[2]);
+ }
+
+ /**
+ * Converts `string` to
+ * [snake case](https://en.wikipedia.org/wiki/Snake_case).
+ *
+ * @static
+ * @memberOf _
+ * @since 3.0.0
+ * @category String
+ * @param {string} [string=''] The string to convert.
+ * @returns {string} Returns the snake cased string.
+ * @example
+ *
+ * _.snakeCase('Foo Bar');
+ * // => 'foo_bar'
+ *
+ * _.snakeCase('fooBar');
+ * // => 'foo_bar'
+ *
+ * _.snakeCase('--FOO-BAR--');
+ * // => 'foo_bar'
+ */
+ var snakeCase = createCompounder(function(result, word, index) {
+ return result + (index ? '_' : '') + word.toLowerCase();
+ });
+
+ /**
+ * Splits `string` by `separator`.
+ *
+ * **Note:** This method is based on
+ * [`String#split`](https://mdn.io/String/split).
+ *
+ * @static
+ * @memberOf _
+ * @since 4.0.0
+ * @category String
+ * @param {string} [string=''] The string to split.
+ * @param {RegExp|string} separator The separator pattern to split by.
+ * @param {number} [limit] The length to truncate results to.
+ * @returns {Array} Returns the string segments.
+ * @example
+ *
+ * _.split('a-b-c', '-', 2);
+ * // => ['a', 'b']
+ */
+ function split(string, separator, limit) {
+ if (limit && typeof limit != 'number' && isIterateeCall(string, separator, limit)) {
+ separator = limit = undefined;
+ }
+ limit = limit === undefined ? MAX_ARRAY_LENGTH : limit >>> 0;
+ if (!limit) {
+ return [];
+ }
+ string = toString(string);
+ if (string && (
+ typeof separator == 'string' ||
+ (separator != null && !isRegExp(separator))
+ )) {
+ separator = baseToString(separator);
+ if (!separator && hasUnicode(string)) {
+ return castSlice(stringToArray(string), 0, limit);
+ }
+ }
+ return string.split(separator, limit);
+ }
+
+ /**
+ * Converts `string` to
+ * [start case](https://en.wikipedia.org/wiki/Letter_case#Stylistic_or_specialised_usage).
+ *
+ * @static
+ * @memberOf _
+ * @since 3.1.0
+ * @category String
+ * @param {string} [string=''] The string to convert.
+ * @returns {string} Returns the start cased string.
+ * @example
+ *
+ * _.startCase('--foo-bar--');
+ * // => 'Foo Bar'
+ *
+ * _.startCase('fooBar');
+ * // => 'Foo Bar'
+ *
+ * _.startCase('__FOO_BAR__');
+ * // => 'FOO BAR'
+ */
+ var startCase = createCompounder(function(result, word, index) {
+ return result + (index ? ' ' : '') + upperFirst(word);
+ });
+
+ /**
+ * Checks if `string` starts with the given target string.
+ *
+ * @static
+ * @memberOf _
+ * @since 3.0.0
+ * @category String
+ * @param {string} [string=''] The string to inspect.
+ * @param {string} [target] The string to search for.
+ * @param {number} [position=0] The position to search from.
+ * @returns {boolean} Returns `true` if `string` starts with `target`,
+ * else `false`.
+ * @example
+ *
+ * _.startsWith('abc', 'a');
+ * // => true
+ *
+ * _.startsWith('abc', 'b');
+ * // => false
+ *
+ * _.startsWith('abc', 'b', 1);
+ * // => true
+ */
+ function startsWith(string, target, position) {
+ string = toString(string);
+ position = position == null
+ ? 0
+ : baseClamp(toInteger(position), 0, string.length);
+
+ target = baseToString(target);
+ return string.slice(position, position + target.length) == target;
+ }
+
+ /**
+ * Creates a compiled template function that can interpolate data properties
+ * in "interpolate" delimiters, HTML-escape interpolated data properties in
+ * "escape" delimiters, and execute JavaScript in "evaluate" delimiters. Data
+ * properties may be accessed as free variables in the template. If a setting
+ * object is given, it takes precedence over `_.templateSettings` values.
+ *
+ * **Note:** In the development build `_.template` utilizes
+ * [sourceURLs](http://www.html5rocks.com/en/tutorials/developertools/sourcemaps/#toc-sourceurl)
+ * for easier debugging.
+ *
+ * For more information on precompiling templates see
+ * [lodash's custom builds documentation](https://lodash.com/custom-builds).
+ *
+ * For more information on Chrome extension sandboxes see
+ * [Chrome's extensions documentation](https://developer.chrome.com/extensions/sandboxingEval).
+ *
+ * @static
+ * @since 0.1.0
+ * @memberOf _
+ * @category String
+ * @param {string} [string=''] The template string.
+ * @param {Object} [options={}] The options object.
+ * @param {RegExp} [options.escape=_.templateSettings.escape]
+ * The HTML "escape" delimiter.
+ * @param {RegExp} [options.evaluate=_.templateSettings.evaluate]
+ * The "evaluate" delimiter.
+ * @param {Object} [options.imports=_.templateSettings.imports]
+ * An object to import into the template as free variables.
+ * @param {RegExp} [options.interpolate=_.templateSettings.interpolate]
+ * The "interpolate" delimiter.
+ * @param {string} [options.sourceURL='lodash.templateSources[n]']
+ * The sourceURL of the compiled template.
+ * @param {string} [options.variable='obj']
+ * The data object variable name.
+ * @param- {Object} [guard] Enables use as an iteratee for methods like `_.map`.
+ * @returns {Function} Returns the compiled template function.
+ * @example
+ *
+ * // Use the "interpolate" delimiter to create a compiled template.
+ * var compiled = _.template('hello <%= user %>!');
+ * compiled({ 'user': 'fred' });
+ * // => 'hello fred!'
+ *
+ * // Use the HTML "escape" delimiter to escape data property values.
+ * var compiled = _.template('<%- value %>');
+ * compiled({ 'value': '