X-Git-Url: https://git.openstreetmap.org./rails.git/blobdiff_plain/76d8bed5d12fc10a785366bfa1a411aa4e0c39d8..2059c8346c9bc46173568f10058cee6988c9dc03:/vendor/assets/iD/iD.js?ds=inline diff --git a/vendor/assets/iD/iD.js b/vendor/assets/iD/iD.js index d4a8ffdef..84eabfdad 100644 --- a/vendor/assets/iD/iD.js +++ b/vendor/assets/iD/iD.js @@ -174,11 +174,13 @@ } })(this); -d3 = (function(){ - var d3 = {version: "3.2.7"}; // semver -d3.ascending = function(a, b) { +!function(){ + var d3 = {version: "3.5.5"}; // semver +d3.ascending = d3_ascending; + +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; }; @@ -188,10 +190,10 @@ d3.min = function(array, f) { a, b; if (arguments.length === 1) { - while (++i < n && !((a = array[i]) != null && a <= a)) a = undefined; + 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 && !((a = f.call(array, array[i], i)) != null && a <= a)) a = undefined; + 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; @@ -202,10 +204,10 @@ d3.max = function(array, f) { a, b; if (arguments.length === 1) { - while (++i < n && !((a = array[i]) != null && a <= a)) a = undefined; + 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 && !((a = f.call(array, array[i], i)) != null && a <= a)) a = undefined; + 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; @@ -217,13 +219,13 @@ d3.extent = function(array, f) { b, c; if (arguments.length === 1) { - while (++i < n && !((a = c = array[i]) != null && a <= a)) a = c = undefined; + 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 && !((a = c = f.call(array, array[i], i)) != null && a <= a)) a = undefined; + 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; @@ -231,36 +233,39 @@ d3.extent = function(array, f) { } return [a, c]; }; +function d3_number(x) { + return x === null ? NaN : +x; +} + +function d3_numeric(x) { + return !isNaN(x); +} + d3.sum = function(array, f) { var s = 0, n = array.length, a, i = -1; - if (arguments.length === 1) { - while (++i < n) if (!isNaN(a = +array[i])) s += a; + while (++i < n) if (d3_numeric(a = +array[i])) s += a; // zero and null are equivalent } else { - while (++i < n) if (!isNaN(a = +f.call(array, array[i], i))) s += a; + while (++i < n) if (d3_numeric(a = +f.call(array, array[i], i))) s += a; } - return s; }; -function d3_number(x) { - return x != null && !isNaN(x); -} d3.mean = function(array, f) { - var n = array.length, + var s = 0, + n = array.length, a, - m = 0, i = -1, - j = 0; + j = n; if (arguments.length === 1) { - while (++i < n) if (d3_number(a = array[i])) m += (a - m) / ++j; + while (++i < n) if (d3_numeric(a = d3_number(array[i]))) s += a; else --j; } else { - while (++i < n) if (d3_number(a = f.call(array, array[i], i))) m += (a - m) / ++j; + while (++i < n) if (d3_numeric(a = d3_number(f.call(array, array[i], i)))) s += a; else --j; } - return j ? m : undefined; + if (j) return s / j; }; // R-7 per d3.quantile = function(values, p) { @@ -272,18 +277,59 @@ d3.quantile = function(values, p) { }; d3.median = function(array, f) { - if (arguments.length > 1) array = array.map(f); - array = array.filter(d3_number); - return array.length ? d3.quantile(array.sort(d3.ascending), .5) : undefined; + 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); }; -d3.bisector = function(f) { + +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); +}; + +d3.deviation = function() { + var v = d3.variance.apply(this, arguments); + return v ? Math.sqrt(v) : v; +}; + +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 (f.call(a, a[mid], mid) < x) lo = mid + 1; + if (compare(a[mid], x) < 0) lo = mid + 1; else hi = mid; } return lo; @@ -293,32 +339,42 @@ d3.bisector = function(f) { if (arguments.length < 4) hi = a.length; while (lo < hi) { var mid = lo + hi >>> 1; - if (x < f.call(a, a[mid], mid)) hi = mid; + if (compare(a[mid], x) > 0) hi = mid; else lo = mid + 1; } return lo; } }; -}; +} + +var d3_bisect = d3_bisector(d3_ascending); +d3.bisectLeft = d3_bisect.left; +d3.bisect = d3.bisectRight = d3_bisect.right; -var d3_bisector = d3.bisector(function(d) { return d; }); -d3.bisectLeft = d3_bisector.left; -d3.bisect = d3.bisectRight = d3_bisector.right; -d3.shuffle = function(array) { - var m = array.length, t, 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], array[m] = array[i], array[i] = t; + t = array[m + i0], array[m + i0] = array[i + i0], array[i + i0] = t; } return array; }; d3.permute = function(array, indexes) { - var permutes = [], - i = -1, - n = indexes.length; - while (++i < n) permutes[i] = array[indexes[i]]; + 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; +}; d3.zip = function() { if (!(n = arguments.length)) return []; @@ -353,8 +409,28 @@ d3.entries = function(map) { return entries; }; d3.merge = function(arrays) { - return Array.prototype.concat.apply([], arrays); + var n = arrays.length, + m, + i = -1, + j = 0, + merged, + array; + + while (++i < n) j += arrays[i].length; + merged = new Array(j); + + 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; @@ -365,7 +441,7 @@ d3.range = function(start, stop, step) { } if ((stop - start) / step === Infinity) throw new Error("infinite range"); var range = [], - k = d3_range_integerScale(Math.abs(step)), + k = d3_range_integerScale(abs(step)), i = -1, j; start *= k, stop *= k, step *= k; @@ -380,66 +456,96 @@ function d3_range_integerScale(x) { return k; } function d3_class(ctor, properties) { - try { - for (var key in properties) { - Object.defineProperty(ctor.prototype, key, { - value: properties[key], - enumerable: false - }); - } - } catch (e) { - ctor.prototype = properties; + for (var key in properties) { + Object.defineProperty(ctor.prototype, key, { + value: properties[key], + enumerable: false + }); } } -d3.map = function(object) { +d3.map = function(object, f) { var map = new d3_Map; - for (var key in object) map.set(key, object[key]); + 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; }; -function d3_Map() {} +function d3_Map() { + this._ = Object.create(null); +} + +var d3_map_proto = "__proto__", + d3_map_zero = "\0"; d3_class(d3_Map, { - has: function(key) { - return d3_map_prefix + key in this; - }, + has: d3_map_has, get: function(key) { - return this[d3_map_prefix + key]; + return this._[d3_map_escape(key)]; }, set: function(key, value) { - return this[d3_map_prefix + key] = value; - }, - remove: function(key) { - key = d3_map_prefix + key; - return key in this && delete this[key]; - }, - keys: function() { - var keys = []; - this.forEach(function(key) { keys.push(key); }); - return keys; + return this._[d3_map_escape(key)] = value; }, + remove: d3_map_remove, + keys: d3_map_keys, values: function() { var values = []; - this.forEach(function(key, value) { values.push(value); }); + for (var key in this._) values.push(this._[key]); return values; }, entries: function() { var entries = []; - this.forEach(function(key, value) { entries.push({key: key, value: value}); }); + 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) { - if (key.charCodeAt(0) === d3_map_prefixCode) { - f.call(this, key.substring(1), this[key]); - } - } + for (var key in this._) f.call(this, d3_map_unescape(key), this._[key]); } }); -var d3_map_prefix = "\0", // prevent collision with built-ins - d3_map_prefixCode = d3_map_prefix.charCodeAt(0); +function d3_map_escape(key) { + return (key += "") === d3_map_proto || key[0] === d3_map_zero ? d3_map_zero + key : key; +} + +function d3_map_unescape(key) { + return (key += "")[0] === d3_map_zero ? key.slice(1) : key; +} + +function d3_map_has(key) { + return d3_map_escape(key) in this._; +} + +function d3_map_remove(key) { + return (key = d3_map_escape(key)) in this._ && delete this._[key]; +} + +function d3_map_keys() { + var keys = []; + for (var key in this._) keys.push(d3_map_unescape(key)); + return keys; +} + +function d3_map_size() { + var size = 0; + for (var key in this._) ++size; + return size; +} + +function d3_map_empty() { + for (var key in this._) return false; + return true; +} d3.nest = function() { var nest = {}, @@ -538,44 +644,45 @@ d3.nest = function() { }; d3.set = function(array) { - var set = new d3_Set(); - if (array) for (var i = 0; i < array.length; i++) set.add(array[i]); + 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() {} +function d3_Set() { + this._ = Object.create(null); +} d3_class(d3_Set, { - has: function(value) { - return d3_map_prefix + value in this; - }, - add: function(value) { - this[d3_map_prefix + value] = true; - return value; - }, - remove: function(value) { - value = d3_map_prefix + value; - return value in this && delete this[value]; - }, - values: function() { - var values = []; - this.forEach(function(value) { - values.push(value); - }); - return values; + 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 value in this) { - if (value.charCodeAt(0) === d3_map_prefixCode) { - f.call(this, value.substring(1)); - } - } + for (var key in this._) f.call(this, d3_map_unescape(key)); } }); d3.behavior = {}; -var d3_document = document, - d3_documentElement = d3_document.documentElement, - d3_window = window; +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; @@ -592,10 +699,9 @@ function d3_rebind(target, source, method) { return value === source ? target : value; }; } - function d3_vendorSymbol(object, name) { if (name in object) return name; - name = name.charAt(0).toUpperCase() + name.substring(1); + 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; @@ -603,24 +709,8 @@ function d3_vendorSymbol(object, name) { } var d3_vendorPrefixes = ["webkit", "ms", "moz", "Moz", "o", "O"]; - -var d3_array = d3_arraySlice; // conversion for NodeLists - -function d3_arrayCopy(pseudoarray) { - var i = -1, n = pseudoarray.length, array = []; - while (++i < n) array.push(pseudoarray[i]); - return array; -} - -function d3_arraySlice(pseudoarray) { - return Array.prototype.slice.call(pseudoarray); -} - -try { - d3_array(d3_documentElement.childNodes)[0].nodeType; -} catch(e) { - d3_array = d3_arrayCopy; -} +var d3_arraySlice = [].slice, + d3_array = function(list) { return d3_arraySlice.call(list); }; // conversion for NodeLists function d3_noop() {} d3.dispatch = function() { @@ -639,8 +729,8 @@ d3_dispatch.prototype.on = function(type, listener) { // Extract optional namespace, e.g., "click.foo" if (i >= 0) { - name = type.substring(i + 1); - type = type.substring(0, i); + name = type.slice(i + 1); + type = type.slice(0, i); } if (type) return arguments.length < 2 @@ -768,18 +858,23 @@ function d3_selection(groups) { var d3_select = function(s, n) { return n.querySelector(s); }, d3_selectAll = function(s, n) { return n.querySelectorAll(s); }, - d3_selectMatcher = d3_documentElement[d3_vendorSymbol(d3_documentElement, "matchesSelector")], - d3_selectMatches = function(n, s) { return d3_selectMatcher.call(n, 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 = function(s, n) { return Sizzle.uniqueSort(Sizzle(s, n)); }; + d3_selectAll = Sizzle; d3_selectMatches = Sizzle.matchesSelector; } d3.selection = function() { - return d3_selectionRoot; + return d3.select(d3_document.documentElement); }; var d3_selectionPrototype = d3.selection.prototype = []; @@ -854,8 +949,8 @@ d3.ns = { var i = name.indexOf(":"), prefix = name; if (i >= 0) { - prefix = name.substring(0, i); - name = name.substring(i + 1); + prefix = name.slice(0, i); + name = name.slice(i + 1); } return d3_nsPrefix.hasOwnProperty(prefix) ? {space: d3_nsPrefix[prefix], local: name} @@ -934,7 +1029,7 @@ d3_selectionPrototype.classed = function(name, value) { // probably doesn't support it on SVG elements (which can be animated). if (typeof name === "string") { var node = this.node(), - n = (name = name.trim().split(/^|\s+/g)).length, + n = (name = d3_selection_classes(name)).length, i = -1; if (value = node.classList) { while (++i < n) if (!value.contains(name[i])) return false; @@ -959,9 +1054,13 @@ 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 = name.trim().split(/\s+/).map(d3_selection_classedName); + name = d3_selection_classes(name).map(d3_selection_classedName); var n = name.length; function classedConstant() { @@ -1010,7 +1109,10 @@ d3_selectionPrototype.style = function(name, value, priority) { } // For style(string), return the computed style value for the first node. - if (n < 2) return d3_window.getComputedStyle(this.node(), null).getPropertyValue(name); + if (n < 2) { + var node = this.node(); + return d3_window(node).getComputedStyle(node, null).getPropertyValue(name); + } // For style(string, string) or style(string, function), use the default // priority. The priority is ignored for style(string, null). @@ -1117,16 +1219,29 @@ d3_selectionPrototype.append = function(name) { }; function d3_selection_creator(name) { + + function create() { + var document = this.ownerDocument, + namespace = this.namespaceURI; + return namespace + ? document.createElementNS(namespace, name) + : document.createElement(name); + } + + function createNS() { + return this.ownerDocument.createElementNS(name.space, name.local); + } + return typeof name === "function" ? name - : (name = d3.ns.qualify(name)).local ? function() { return d3_document.createElementNS(name.space, name.local); } - : function() { return d3_document.createElementNS(this.namespaceURI, name); }; + : (name = d3.ns.qualify(name)).local ? createNS + : create; } 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)); + return this.insertBefore(name.apply(this, arguments), before.apply(this, arguments) || null); }); }; @@ -1134,12 +1249,14 @@ d3_selectionPrototype.insert = function(name, before) { // TODO remove(node)? // TODO remove(function)? d3_selectionPrototype.remove = function() { - return this.each(function() { - var parent = this.parentNode; - if (parent) parent.removeChild(this); - }); + return this.each(d3_selectionRemove); }; +function d3_selectionRemove() { + var parent = this.parentNode; + if (parent) parent.removeChild(this); +} + d3_selectionPrototype.data = function(value, key) { var i = -1, n = this.length, @@ -1170,34 +1287,30 @@ d3_selectionPrototype.data = function(value, key) { if (key) { var nodeByKeyValue = new d3_Map, - dataByKeyValue = new d3_Map, - keyValues = [], + keyValues = new Array(n), keyValue; for (i = -1; ++i < n;) { - keyValue = key.call(node = group[i], node.__data__, i); - if (nodeByKeyValue.has(keyValue)) { + if (nodeByKeyValue.has(keyValue = key.call(node = group[i], node.__data__, i))) { exitNodes[i] = node; // duplicate selection key } else { nodeByKeyValue.set(keyValue, node); } - keyValues.push(keyValue); + keyValues[i] = keyValue; } for (i = -1; ++i < m;) { - keyValue = key.call(groupData, nodeData = groupData[i], i); - if (node = nodeByKeyValue.get(keyValue)) { + 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; - } else if (!dataByKeyValue.has(keyValue)) { // no duplicate data key - enterNodes[i] = d3_selection_dataNode(nodeData); } - dataByKeyValue.set(keyValue, nodeData); - nodeByKeyValue.remove(keyValue); + nodeByKeyValue.set(keyValue, true); } for (i = -1; ++i < n;) { - if (nodeByKeyValue.has(keyValues[i])) { + if (nodeByKeyValue.get(keyValues[i]) !== true) { exitNodes[i] = group[i]; } } @@ -1274,7 +1387,7 @@ d3_selectionPrototype.filter = function(filter) { 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)) { + if ((node = group[i]) && filter.call(node, node.__data__, i, j)) { subgroup.push(node); } } @@ -1308,9 +1421,9 @@ d3_selectionPrototype.sort = function(comparator) { }; function d3_selection_sortComparator(comparator) { - if (!arguments.length) comparator = d3.ascending; + if (!arguments.length) comparator = d3_ascending; return function(a, b) { - return (!a - !b) || comparator(a.__data__, b.__data__); + return a && b ? comparator(a.__data__, b.__data__) : !a - !b; }; } @@ -1351,7 +1464,7 @@ d3_selectionPrototype.node = function() { d3_selectionPrototype.size = function() { var n = 0; - this.each(function() { ++n; }); + d3_selection_each(this, function() { ++n; }); return n; }; @@ -1415,39 +1528,31 @@ function d3_selection_enterInsertBefore(enter) { }; } -d3_selectionPrototype.transition = function() { - var id = d3_transitionInheritId || ++d3_transitionId, - subgroups = [], - subgroup, - node, - transition = d3_transitionInherit || {time: Date.now(), ease: d3_ease_cubicInOut, delay: 0, duration: 250}; - - 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, id, transition); - subgroup.push(node); - } - } - - return d3_transition(subgroups, id); -}; - // TODO fast singleton implementation? d3.select = function(node) { - var group = [typeof node === "string" ? d3_select(node, d3_document) : node]; - group.parentNode = d3_documentElement; + 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]); }; d3.selectAll = function(nodes) { - var group = d3_array(typeof nodes === "string" ? d3_selectAll(nodes, d3_document) : nodes); - group.parentNode = d3_documentElement; + 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]); }; -var d3_selectionRoot = d3.select(d3_documentElement); - d3_selectionPrototype.on = function(type, listener, capture) { var n = arguments.length; if (n < 3) { @@ -1477,7 +1582,7 @@ function d3_selection_on(type, listener, capture) { i = type.indexOf("."), wrap = d3_selection_onListener; - if (i > 0) type = type.substring(0, i); + if (i > 0) type = type.slice(0, i); var filter = d3_selection_onFilters.get(type); if (filter) type = filter, wrap = d3_selection_onFilter; @@ -1519,9 +1624,11 @@ var d3_selection_onFilters = d3.map({ mouseleave: "mouseout" }); -d3_selection_onFilters.forEach(function(k) { - if ("on" + k in d3_document) d3_selection_onFilters.remove(k); -}); +if (d3_document) { + d3_selection_onFilters.forEach(function(k) { + if ("on" + k in d3_document) d3_selection_onFilters.remove(k); + }); +} function d3_selection_onListener(listener, argumentz) { return function(e) { @@ -1546,24 +1653,33 @@ function d3_selection_onFilter(listener, argumentz) { }; } -var d3_event_dragSelect = d3_vendorSymbol(d3_documentElement.style, "userSelect"), +var d3_event_dragSelect, d3_event_dragId = 0; -function d3_event_dragSuppress() { +function d3_event_dragSuppress(node) { var name = ".dragsuppress-" + ++d3_event_dragId, - touchmove = "touchmove" + name, - selectstart = "selectstart" + name, - dragstart = "dragstart" + name, click = "click" + name, - w = d3.select(d3_window).on(touchmove, d3_eventPreventDefault).on(selectstart, d3_eventPreventDefault).on(dragstart, d3_eventPreventDefault), - style = d3_documentElement.style, - select = style[d3_event_dragSelect]; - style[d3_event_dragSelect] = "none"; + w = d3.select(d3_window(node)) + .on("touchmove" + name, d3_eventPreventDefault) + .on("dragstart" + name, d3_eventPreventDefault) + .on("selectstart" + name, d3_eventPreventDefault); + + if (d3_event_dragSelect == null) { + d3_event_dragSelect = "onselectstart" in node ? false + : d3_vendorSymbol(node.style, "userSelect"); + } + + if (d3_event_dragSelect) { + var style = d3_documentElement(node).style, + select = style[d3_event_dragSelect]; + style[d3_event_dragSelect] = "none"; + } + return function(suppressClick) { w.on(name, null); - style[d3_event_dragSelect] = select; + if (d3_event_dragSelect) style[d3_event_dragSelect] = select; if (suppressClick) { // suppress the next click, but only if it’s immediate - function off() { w.on(click, null); } + var off = function() { w.on(click, null); }; w.on(click, function() { d3_eventCancel(); off(); }, true); setTimeout(off, 0); } @@ -1575,32 +1691,31 @@ d3.mouse = function(container) { }; // https://bugs.webkit.org/show_bug.cgi?id=44083 -var d3_mouse_bug44083 = /WebKit/.test(d3_window.navigator.userAgent) ? -1 : 0; +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 && (d3_window.scrollX || d3_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; + 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]; } @@ -1616,47 +1731,208 @@ d3.touches = function(container, touches) { return point; }) : []; }; +var ε = 1e-6, + ε2 = ε * ε, + π = Math.PI, + τ = 2 * π, + τε = τ - ε, + halfπ = π / 2, + d3_radians = π / 180, + d3_degrees = 180 / π; + +function d3_sgn(x) { + return x > 0 ? 1 : x < 0 ? -1 : 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]); +} + +function d3_acos(x) { + return x > 1 ? 0 : x < -1 ? π : Math.acos(x); +} + +function d3_asin(x) { + return x > 1 ? halfπ : x < -1 ? -halfπ : Math.asin(x); +} + +function d3_sinh(x) { + return ((x = Math.exp(x)) - 1 / x) / 2; +} + +function d3_cosh(x) { + return ((x = Math.exp(x)) + 1 / x) / 2; +} + +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 ρ = Math.SQRT2, + ρ2 = 2, + ρ4 = 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 + ρ4 * d2) / (2 * w0 * ρ2 * d1), + b1 = (w1 * w1 - w0 * w0 - ρ4 * d2) / (2 * w1 * ρ2 * 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)) / ρ; + + function interpolate(t) { + var s = t * S; + if (dr) { + // General case. + var coshr0 = d3_cosh(r0), + u = w0 / (ρ2 * d1) * (coshr0 * d3_tanh(ρ * s + r0) - d3_sinh(r0)); + return [ + ux0 + u * dx, + uy0 + u * dy, + w0 * coshr0 / d3_cosh(ρ * s + r0) + ]; + } + // Special case for u0 ~= u1. + return [ + ux0 + t * dx, + uy0 + t * dy, + w0 * Math.exp(ρ * s) + ]; + } + + interpolate.duration = S * 1000; + + return interpolate; +}; d3.behavior.zoom = function() { - var translate = [0, 0], + var view = {x: 0, y: 0, k: 1}, translate0, // translate when we started zooming (to avoid drift) - scale = 1, + 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", - event = d3_eventDispatch(zoom, "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, - touchtime; // time of last touchstart (to detect double-tap) + y1; + + // Lazily determine the DOM’s 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"); + } - function zoom() { - this.on(mousedown, mousedowned) + function zoom(g) { + g .on(mousedown, mousedowned) .on(d3_behavior_zoomWheel + ".zoom", mousewheeled) - .on(mousemove, mousewheelreset) .on("dblclick.zoom", dblclicked) - .on("touchstart.zoom", touchstarted); + .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); + }); + } else { + this.__chart__ = view; + zoomstarted(dispatch); + zoomed(dispatch); + zoomended(dispatch); + } + }); } - zoom.translate = function(x) { - if (!arguments.length) return translate; - translate = x.map(Number); + 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; }; - zoom.scale = function(x) { - if (!arguments.length) return scale; - scale = +x; + 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(x) { + zoom.scaleExtent = function(_) { if (!arguments.length) return scaleExtent; - scaleExtent = x == null ? d3_behavior_zoomInfinity : x.map(Number); + scaleExtent = _ == null ? d3_behavior_zoomInfinity : [+_[0], +_[1]]; + return zoom; + }; + + zoom.center = function(_) { + if (!arguments.length) return center; + center = _ && [+_[0], +_[1]]; + return zoom; + }; + + zoom.size = function(_) { + if (!arguments.length) return size; + size = _ && [+_[0], +_[1]]; + return zoom; + }; + + zoom.duration = function(_) { + if (!arguments.length) return duration; + duration = +_; // TODO function based on interpolateZoom distance? return zoom; }; @@ -1664,8 +1940,7 @@ d3.behavior.zoom = function() { if (!arguments.length) return x1; x1 = z; x0 = z.copy(); - translate = [0, 0]; - scale = 1; + view = {x: 0, y: 0, k: 1}; // copy-on-write return zoom; }; @@ -1673,104 +1948,163 @@ d3.behavior.zoom = function() { if (!arguments.length) return y1; y1 = z; y0 = z.copy(); - translate = [0, 0]; - scale = 1; + view = {x: 0, y: 0, k: 1}; // copy-on-write return zoom; }; function location(p) { - return [(p[0] - translate[0]) / scale, (p[1] - translate[1]) / scale]; + return [(p[0] - view.x) / view.k, (p[1] - view.y) / view.k]; } function point(l) { - return [l[0] * scale + translate[0], l[1] * scale + translate[1]]; + return [l[0] * view.k + view.x, l[1] * view.k + view.y]; } function scaleTo(s) { - scale = Math.max(scaleExtent[0], Math.min(scaleExtent[1], s)); + view.k = Math.max(scaleExtent[0], Math.min(scaleExtent[1], s)); } function translateTo(p, l) { l = point(l); - translate[0] += p[0] - l[0]; - translate[1] += p[1] - l[1]; + 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}; + + scaleTo(Math.pow(2, k)); + translateTo(center0 = p, l); + + that = d3.select(that); + if (duration > 0) that = that.transition().duration(duration); + that.call(zoom.event); } function rescale() { - if (x1) x1.domain(x0.range().map(function(x) { return (x - translate[0]) / scale; }).map(x0.invert)); - if (y1) y1.domain(y0.range().map(function(y) { return (y - translate[1]) / scale; }).map(y0.invert)); + 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)); + } + + function zoomstarted(dispatch) { + if (!zooming++) dispatch({type: "zoomstart"}); } - function dispatch(event) { + function zoomed(dispatch) { rescale(); - event({type: "zoom", scale: scale, translate: translate}); + dispatch({type: "zoom", scale: view.k, translate: [view.x, view.y]}); + } + + function zoomended(dispatch) { + if (!--zooming) dispatch({type: "zoomend"}); + center0 = null; } function mousedowned() { - var target = this, - event_ = event.of(target, arguments), - eventTarget = d3.event.target, + var that = this, + target = d3.event.target, + dispatch = event.of(that, arguments), dragged = 0, - w = d3.select(d3_window).on(mousemove, moved).on(mouseup, ended), - l = location(d3.mouse(target)), - dragRestore = d3_event_dragSuppress(); + subject = d3.select(d3_window(that)).on(mousemove, moved).on(mouseup, ended), + location0 = location(d3.mouse(that)), + dragRestore = d3_event_dragSuppress(that); + + d3_selection_interrupt.call(that); + zoomstarted(dispatch); function moved() { dragged = 1; - translateTo(d3.mouse(target), l); - dispatch(event_); + translateTo(d3.mouse(that), location0); + zoomed(dispatch); } function ended() { - w.on(mousemove, d3_window === target ? mousewheelreset : null).on(mouseup, null); - dragRestore(dragged && d3.event.target === eventTarget); + subject.on(mousemove, null).on(mouseup, null); + dragRestore(dragged && d3.event.target === target); + zoomended(dispatch); } } + // These closures persist for as long as at least one touch is active. function touchstarted() { - var target = this, - event_ = event.of(target, arguments), - touches = d3.touches(target), - locations = {}, + var that = this, + dispatch = event.of(that, arguments), + locations0 = {}, // touchstart locations distance0 = 0, // distance² between initial touches - scale0 = scale, // scale when we started touching - now = Date.now(), - name = "zoom-" + d3.event.changedTouches[0].identifier, - touchmove = "touchmove." + name, - touchend = "touchend." + name, - w = d3.select(d3_window).on(touchmove, moved).on(touchend, ended), - t = d3.select(target).on(mousedown, null), // prevent duplicate events - dragRestore = d3_event_dragSuppress(); - - touches.forEach(function(t) { locations[t.identifier] = location(t); }); - - if (touches.length === 1) { - if (now - touchtime < 500) { // dbltap - var p = touches[0], l = location(touches[0]); - scaleTo(scale * 2); - translateTo(p, l); - d3_eventPreventDefault(); - dispatch(event_); + 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; + } + + // 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; + } + + var touches = relocate(), + now = Date.now(); + + 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(); + } + 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; } - 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; } function moved() { - var touches = d3.touches(target), - p0 = touches[0], - l0 = locations[p0.identifier]; + var touches = d3.touches(that), + p0, l0, + p1, l1; + + d3_selection_interrupt.call(that); - if (p1 = touches[1]) { - var p1, l1 = locations[p1.identifier], - scale1 = d3.event.scale; - if (scale1 == null) { - var distance1 = (distance1 = p1[0] - p0[0]) * distance1 + (distance1 = p1[1] - p0[1]) * distance1; - scale1 = distance0 && Math.sqrt(distance1 / distance0); + 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; } + } + + 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); @@ -1778,57 +2112,76 @@ d3.behavior.zoom = function() { touchtime = null; translateTo(p0, l0); - dispatch(event_); + zoomed(dispatch); } function ended() { - w.on(touchmove, null).on(touchend, null); - t.on(mousedown, mousedowned); + // 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 + } + } + // Otherwise, remove touchmove and touchend listeners. + d3.selectAll(targets).on(zoomName, null); + subject.on(mousedown, mousedowned).on(touchstart, touchstarted); dragRestore(); + zoomended(dispatch); } } 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(); - if (!translate0) translate0 = location(d3.mouse(this)); - scaleTo(Math.pow(2, d3_behavior_zoomDelta() * .002) * scale); - translateTo(d3.mouse(this), translate0); - dispatch(event.of(this, arguments)); - } - - function mousewheelreset() { - translate0 = null; + scaleTo(Math.pow(2, d3_behavior_zoomDelta() * .002) * view.k); + translateTo(center0, translate0); + zoomed(dispatch); } function dblclicked() { - var p = d3.mouse(this), l = location(p), k = Math.log(scale) / Math.LN2; - scaleTo(Math.pow(2, d3.event.shiftKey ? Math.ceil(k) - 1 : Math.floor(k) + 1)); - translateTo(p, l); - dispatch(event.of(this, arguments)); + var p = d3.mouse(this), + k = Math.log(view.k) / Math.LN2; + + zoomTo(this, p, location(p), d3.event.shiftKey ? Math.ceil(k) - 1 : Math.floor(k) + 1); } return d3.rebind(zoom, event, "on"); }; -var d3_behavior_zoomInfinity = [0, Infinity]; // default scale extent - -// https://developer.mozilla.org/en-US/docs/Mozilla_event_reference/wheel -var d3_behavior_zoomDelta, 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"); +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; }; } d3.functor = d3_functor; +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); + } + } +}; + 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 = d3_window[d3_vendorSymbol(d3_window, "requestAnimationFrame")] || function(callback) { setTimeout(callback, 17); }; + 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) { @@ -1837,8 +2190,8 @@ d3.timer = function(callback, delay, then) { if (n < 3) then = Date.now(); // Add the callback to the tail of the queue. - var time = then + delay, timer = {callback: callback, time: time, next: null}; - if (d3_timer_queueTail) d3_timer_queueTail.next = timer; + 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; @@ -1870,20 +2223,12 @@ d3.timer.flush = function() { d3_timer_sweep(); }; -function d3_timer_replace(callback, delay, then) { - var n = arguments.length; - if (n < 2) delay = 0; - if (n < 3) then = Date.now(); - d3_timer_active.callback = callback; - d3_timer_active.time = then + delay; -} - function d3_timer_mark() { var now = Date.now(); d3_timer_active = d3_timer_queueHead; while (d3_timer_active) { - if (now >= d3_timer_active.time) d3_timer_active.flush = d3_timer_active.callback(now - d3_timer_active.time); - d3_timer_active = d3_timer_active.next; + 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; } @@ -1895,46 +2240,126 @@ function d3_timer_sweep() { t1 = d3_timer_queueHead, time = Infinity; while (t1) { - if (t1.flush) { - t1 = t0 ? t0.next = t1.next : d3_timer_queueHead = t1.next; + if (t1.f) { + t1 = t0 ? t0.n = t1.n : d3_timer_queueHead = t1.n; } else { - if (t1.time < time) time = t1.time; - t1 = (t0 = t1).next; + if (t1.t < time) time = t1.t; + t1 = (t0 = t1).n; } } d3_timer_queueTail = t0; return time; } -var π = Math.PI, - ε = 1e-6, - ε2 = ε * ε, - d3_radians = π / 180, - d3_degrees = 180 / π; +d3.geo = {}; -function d3_sgn(x) { - return x > 0 ? 1 : x < 0 ? -1 : 0; -} +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_acos(x) { - return x > 1 ? 0 : x < -1 ? π : Math.acos(x); +function d3_geo_streamGeometry(geometry, listener) { + if (geometry && d3_geo_streamGeometryType.hasOwnProperty(geometry.type)) { + d3_geo_streamGeometryType[geometry.type](geometry, listener); + } } -function d3_asin(x) { - return x > 1 ? π / 2 : x < -1 ? -π / 2 : Math.asin(x); -} +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); + } +}; -function d3_sinh(x) { - return (Math.exp(x) - Math.exp(-x)) / 2; +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); + } +}; + +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(); } -function d3_cosh(x) { - return (Math.exp(x) + Math.exp(-x)) / 2; +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(); } -function d3_haversin(x) { - return (x = Math.sin(x / 2)) * x; +d3.geo.length = function(object) { + d3_geo_lengthSum = 0; + d3.geo.stream(object, d3_geo_length); + return d3_geo_lengthSum; +}; + +var d3_geo_lengthSum; + +var d3_geo_length = { + sphere: d3_noop, + point: d3_noop, + lineStart: d3_geo_lengthLineStart, + lineEnd: d3_noop, + polygonStart: d3_noop, + polygonEnd: d3_noop +}; + +function d3_geo_lengthLineStart() { + var λ0, sinφ0, cosφ0; + + d3_geo_length.point = function(λ, φ) { + λ0 = λ * d3_radians, sinφ0 = Math.sin(φ *= d3_radians), cosφ0 = Math.cos(φ); + d3_geo_length.point = nextPoint; + }; + + d3_geo_length.lineEnd = function() { + d3_geo_length.point = d3_geo_length.lineEnd = d3_noop; + }; + + function nextPoint(λ, φ) { + var sinφ = Math.sin(φ *= d3_radians), + cosφ = Math.cos(φ), + t = abs((λ *= d3_radians) - λ0), + cosΔλ = Math.cos(t); + d3_geo_lengthSum += Math.atan2(Math.sqrt((t = cosφ * Math.sin(t)) * t + (t = cosφ0 * sinφ - sinφ0 * cosφ * cosΔλ) * t), sinφ0 * sinφ + cosφ0 * cosφ * cosΔλ); + λ0 = λ, sinφ0 = sinφ, cosφ0 = cosφ; + } } -d3.geo = {}; function d3_identity(d) { return d; } @@ -1950,13 +2375,13 @@ function d3_geo_spherical(cartesian) { } function d3_geo_sphericalEqual(a, b) { - return Math.abs(a[0] - b[0]) < ε && Math.abs(a[1] - b[1]) < ε; + return abs(a[0] - b[0]) < ε && abs(a[1] - b[1]) < ε; } // 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, inside, interpolate, listener) { +function d3_geo_clipPolygon(segments, compare, clipStartInside, interpolate, listener) { var subject = [], clip = []; @@ -1975,14 +2400,14 @@ function d3_geo_clipPolygon(segments, compare, inside, interpolate, listener) { return; } - var a = {point: p0, points: segment, other: null, visited: false, entry: true, subject: true}, - b = {point: p0, points: [p0], other: a, visited: false, entry: false, subject: false}; - a.other = b; + 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 = {point: p1, points: [p1], other: null, visited: false, entry: false, subject: true}; - b = {point: p1, points: [p1], other: a, visited: false, entry: true, subject: false}; - a.other = 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); }); @@ -1991,41 +2416,42 @@ function d3_geo_clipPolygon(segments, compare, inside, interpolate, listener) { d3_geo_clipPolygonLinkCircular(clip); if (!subject.length) return; - if (inside) for (var i = 1, e = !inside(clip[0].point), n = clip.length; i < n; ++i) { - clip[i].entry = (e = !e); + for (var i = 0, entry = clipStartInside, n = clip.length; i < n; ++i) { + clip[i].e = entry = !entry; } var start = subject[0], - current, points, point; while (1) { // Find first unvisited intersection. - current = start; - while (current.visited) if ((current = current.next) === start) return; - points = current.points; + var current = start, + isSubject = true; + while (current.v) if ((current = current.n) === start) return; + points = current.z; listener.lineStart(); do { - current.visited = current.other.visited = true; - if (current.entry) { - if (current.subject) { - for (var i = 0; i < points.length; i++) listener.point((point = points[i])[0], point[1]); + 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.point, current.next.point, 1, listener); + interpolate(current.x, current.n.x, 1, listener); } - current = current.next; + current = current.n; } else { - if (current.subject) { - points = current.prev.points; - for (var i = points.length; --i >= 0;) listener.point((point = points[i])[0], point[1]); + 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.point, current.prev.point, -1, listener); + interpolate(current.x, current.p.x, -1, listener); } - current = current.prev; + current = current.p; } - current = current.other; - points = current.points; - } while (!current.visited); + current = current.o; + points = current.z; + isSubject = !isSubject; + } while (!current.v); listener.lineEnd(); } } @@ -2037,17 +2463,27 @@ function d3_geo_clipPolygonLinkCircular(array) { a = array[0], b; while (++i < n) { - a.next = b = array[i]; - b.prev = a; + a.n = b = array[i]; + b.p = a; a = b; } - a.next = b = array[0]; - b.prev = a; + a.n = b = array[0]; + b.p = a; } -function d3_geo_clip(pointVisible, clipLine, interpolate, polygonContains) { - return function(listener) { - var line = clipLine(listener); +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 +} + +function d3_geo_clip(pointVisible, clipLine, interpolate, clipStart) { + return function(rotate, listener) { + var line = clipLine(listener), + rotatedClipStart = rotate.invert(clipStart[0], clipStart[1]); var clip = { point: point, @@ -2059,7 +2495,6 @@ function d3_geo_clip(pointVisible, clipLine, interpolate, polygonContains) { clip.lineEnd = ringEnd; segments = []; polygon = []; - listener.polygonStart(); }, polygonEnd: function() { clip.point = point; @@ -2067,14 +2502,17 @@ function d3_geo_clip(pointVisible, clipLine, interpolate, polygonContains) { clip.lineEnd = lineEnd; segments = d3.merge(segments); + var clipStartInside = d3_geo_pointInPolygon(rotatedClipStart, polygon); if (segments.length) { - d3_geo_clipPolygon(segments, d3_geo_clipSort, null, interpolate, listener); - } else if (polygonContains(polygon)) { + 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(); } - listener.polygonEnd(); + if (polygonStarted) listener.polygonEnd(), polygonStarted = false; segments = polygon = null; }, sphere: function() { @@ -2086,8 +2524,14 @@ function d3_geo_clip(pointVisible, clipLine, interpolate, polygonContains) { } }; - function point(λ, φ) { if (pointVisible(λ, φ)) listener.point(λ, φ); } - function pointLine(λ, φ) { line.point(λ, φ); } + function point(λ, φ) { + var point = rotate(λ, φ); + if (pointVisible(λ = point[0], φ = point[1])) listener.point(λ, φ); + } + function pointLine(λ, φ) { + var point = rotate(λ, φ); + line.point(point[0], point[1]); + } function lineStart() { clip.point = pointLine; line.lineStart(); } function lineEnd() { clip.point = point; line.lineEnd(); } @@ -2095,12 +2539,14 @@ function d3_geo_clip(pointVisible, clipLine, interpolate, polygonContains) { var buffer = d3_geo_clipBufferListener(), ringListener = clipLine(buffer), + polygonStarted = false, polygon, ring; function pointRing(λ, φ) { - ringListener.point(λ, φ); ring.push([λ, φ]); + var point = rotate(λ, φ); + ringListener.point(point[0], point[1]); } function ringStart() { @@ -2129,9 +2575,12 @@ function d3_geo_clip(pointVisible, clipLine, interpolate, polygonContains) { var n = segment.length - 1, i = -1, point; - listener.lineStart(); - while (++i < n) listener.point((point = segment[i])[0], point[1]); - listener.lineEnd(); + if (n > 0) { + if (!polygonStarted) listener.polygonStart(), polygonStarted = true; + listener.lineStart(); + while (++i < n) listener.point((point = segment[i])[0], point[1]); + listener.lineEnd(); + } return; } @@ -2172,193 +2621,118 @@ function d3_geo_clipBufferListener() { // 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.point)[0] < 0 ? a[1] - π / 2 - ε : π / 2 - a[1]) - - ((b = b.point)[0] < 0 ? b[1] - π / 2 - ε : π / 2 - b[1]); + return ((a = a.x)[0] < 0 ? a[1] - halfπ - ε : halfπ - a[1]) + - ((b = b.x)[0] < 0 ? b[1] - halfπ - ε : halfπ - b[1]); } -// 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) -// 305–363 (1997). -// Code adapted from GeographicLib by Charles F. F. Karney, -// http://geographiclib.sourceforge.net/ -// See lib/geographiclib/LICENSE for details. -function d3_adder() {} +var d3_geo_clipAntimeridian = d3_geo_clip( + d3_true, + d3_geo_clipAntimeridianLine, + d3_geo_clipAntimeridianInterpolate, + [-π, -π / 2]); -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; - } -}; +// 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, + φ0 = NaN, + sλ0 = NaN, + clean; // no intersections -var d3_adderTemp = new d3_adder; + return { + lineStart: function() { + listener.lineStart(); + clean = 1; + }, + point: function(λ1, φ1) { + var sλ1 = λ1 > 0 ? π : -π, + dλ = abs(λ1 - λ0); + if (abs(dλ - π) < ε) { // line crosses a pole + listener.point(λ0, φ0 = (φ0 + φ1) / 2 > 0 ? halfπ : -halfπ); + listener.point(sλ0, φ0); + listener.lineEnd(); + listener.lineStart(); + listener.point(sλ1, φ0); + listener.point(λ1, φ0); + clean = 0; + } else if (sλ0 !== sλ1 && dλ >= π) { // line crosses antimeridian + // handle degeneracies + if (abs(λ0 - sλ0) < ε) λ0 -= sλ0 * ε; + if (abs(λ1 - sλ1) < ε) λ1 -= sλ1 * ε; + φ0 = d3_geo_clipAntimeridianIntersect(λ0, φ0, λ1, φ1); + listener.point(sλ0, φ0); + listener.lineEnd(); + listener.lineStart(); + listener.point(sλ1, φ0); + clean = 0; + } + listener.point(λ0 = λ1, φ0 = φ1); + sλ0 = sλ1; + }, + lineEnd: function() { + listener.lineEnd(); + λ0 = φ0 = NaN; + }, + // if there are intersections, we always rejoin the first and last segments. + clean: function() { return 2 - clean; } + }; +} -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 +function d3_geo_clipAntimeridianIntersect(λ0, φ0, λ1, φ1) { + var cosφ0, + cosφ1, + sinλ0_λ1 = Math.sin(λ0 - λ1); + return abs(sinλ0_λ1) > ε + ? Math.atan((Math.sin(φ0) * (cosφ1 = Math.cos(φ1)) * Math.sin(λ1) + - Math.sin(φ1) * (cosφ0 = Math.cos(φ0)) * Math.sin(λ0)) + / (cosφ0 * cosφ1 * sinλ0_λ1)) + : (φ0 + φ1) / 2; } -d3.geo.stream = function(object, listener) { - if (object && d3_geo_streamObjectType.hasOwnProperty(object.type)) { - d3_geo_streamObjectType[object.type](object, listener); +function d3_geo_clipAntimeridianInterpolate(from, to, direction, listener) { + var φ; + if (from == null) { + φ = direction * halfπ; + listener.point(-π, φ); + listener.point( 0, φ); + listener.point( π, φ); + listener.point( π, 0); + listener.point( π, -φ); + listener.point( 0, -φ); + listener.point(-π, -φ); + listener.point(-π, 0); + listener.point(-π, φ); + } else if (abs(from[0] - to[0]) > ε) { + var s = from[0] < to[0] ? π : -π; + φ = direction * s / 2; + listener.point(-s, φ); + listener.point( 0, φ); + listener.point( s, φ); } else { - d3_geo_streamGeometry(object, listener); + listener.point(to[0], to[1]); } -}; +} +// TODO +// cross and scale return new vectors, +// whereas add and normalize operate in-place -function d3_geo_streamGeometry(geometry, listener) { - if (geometry && d3_geo_streamGeometryType.hasOwnProperty(geometry.type)) { - d3_geo_streamGeometryType[geometry.type](geometry, listener); - } +function d3_geo_cartesian(spherical) { + var λ = spherical[0], + φ = spherical[1], + cosφ = Math.cos(φ); + return [ + cosφ * Math.cos(λ), + cosφ * Math.sin(λ), + Math.sin(φ) + ]; } -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) { - var coordinate = object.coordinates; - listener.point(coordinate[0], coordinate[1]); - }, - MultiPoint: function(object, listener) { - var coordinates = object.coordinates, i = -1, n = coordinates.length, coordinate; - while (++i < n) coordinate = coordinates[i], listener.point(coordinate[0], coordinate[1]); - }, - 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); - } -}; - -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]); - listener.lineEnd(); -} - -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(); -} - -d3.geo.area = function(object) { - d3_geo_areaSum = 0; - d3.geo.stream(object, d3_geo_area); - return d3_geo_areaSum; -}; - -var d3_geo_areaSum, - d3_geo_areaRingSum = new d3_adder; - -var d3_geo_area = { - sphere: function() { d3_geo_areaSum += 4 * π; }, - point: d3_noop, - lineStart: d3_noop, - lineEnd: d3_noop, - - // 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 * π + area : area; - d3_geo_area.lineStart = d3_geo_area.lineEnd = d3_geo_area.point = d3_noop; - } -}; - -function d3_geo_areaRingStart() { - var λ00, φ00, λ0, cosφ0, sinφ0; // start point and previous point - - // For the first point, … - d3_geo_area.point = function(λ, φ) { - d3_geo_area.point = nextPoint; - λ0 = (λ00 = λ) * d3_radians, cosφ0 = Math.cos(φ = (φ00 = φ) * d3_radians / 2 + π / 4), sinφ0 = Math.sin(φ); - }; - - // For subsequent points, … - function nextPoint(λ, φ) { - λ *= d3_radians; - φ = φ * d3_radians / 2 + π / 4; // half the angular distance from south pole - - // Spherical excess E for a spherical triangle with vertices: south pole, - // previous point, current point. Uses a formula derived from Cagnoli’s - // theorem. See Todhunter, Spherical Trig. (1871), Sec. 103, Eq. (2). - var dλ = λ - λ0, - cosφ = Math.cos(φ), - sinφ = Math.sin(φ), - k = sinφ0 * sinφ, - u = cosφ0 * cosφ + k * Math.cos(dλ), - v = k * Math.sin(dλ); - d3_geo_areaRingSum.add(Math.atan2(v, u)); - - // Advance the previous points. - λ0 = λ, cosφ0 = cosφ, sinφ0 = sinφ; - } - - // For the last point, return to the start. - d3_geo_area.lineEnd = function() { - nextPoint(λ00, φ00); - }; -} -// TODO -// cross and scale return new vectors, -// whereas add and normalize operate in-place - -function d3_geo_cartesian(spherical) { - var λ = spherical[0], - φ = spherical[1], - cosφ = Math.cos(φ); - return [ - cosφ * Math.cos(λ), - cosφ * Math.sin(λ), - Math.sin(φ) - ]; -} - -function d3_geo_cartesianDot(a, b) { - return a[0] * b[0] + a[1] * b[1] + a[2] * b[2]; -} +function d3_geo_cartesianDot(a, b) { + return a[0] * b[0] + a[1] * b[1] + a[2] * b[2]; +} function d3_geo_cartesianCross(a, b) { return [ @@ -2388,169 +2762,17 @@ function d3_geo_cartesianNormalize(d) { d[1] /= l; d[2] /= l; } +function d3_geo_compose(a, b) { -function d3_geo_pointInPolygon(point, polygon) { - var meridian = point[0], - parallel = point[1], - meridianNormal = [Math.sin(meridian), -Math.cos(meridian), 0], - polarAngle = 0, - polar = false, - southPole = false, - winding = 0; - d3_geo_areaRingSum.reset(); - - 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], - φ0 = point0[1] / 2 + π / 4, - sinφ0 = Math.sin(φ0), - cosφ0 = Math.cos(φ0), - j = 1; - - while (true) { - if (j === m) j = 0; - point = ring[j]; - var λ = point[0], - φ = point[1] / 2 + π / 4, - sinφ = Math.sin(φ), - cosφ = Math.cos(φ), - dλ = λ - λ0, - antimeridian = Math.abs(dλ) > π, - k = sinφ0 * sinφ; - d3_geo_areaRingSum.add(Math.atan2(k * Math.sin(dλ), cosφ0 * cosφ + k * Math.cos(dλ))); - - if (Math.abs(φ) < ε) southPole = true; - polarAngle += antimeridian ? dλ + (dλ >= 0 ? 2 : -2) * π : 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 φarc = (antimeridian ^ dλ >= 0 ? -1 : 1) * d3_asin(intersection[2]); - if (parallel > φarc) { - winding += antimeridian ^ dλ >= 0 ? 1 : -1; - } - } - if (!j++) break; - λ0 = λ, sinφ0 = sinφ, cosφ0 = cosφ, point0 = point; - } - if (Math.abs(polarAngle) > ε) polar = true; + function compose(x, y) { + return x = a(x, y), b(x[0], x[1]); } - // First, determine whether the South pole is inside or outside: - // - // It is inside if: - // * the polygon doesn't wind around it, and its area is negative (counter-clockwise). - // * otherwise, if the polygon winds around it in a clockwise direction. - // - // 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. - - return (!southPole && !polar && d3_geo_areaRingSum < 0 || polarAngle < -ε) ^ (winding & 1); -} - -var d3_geo_clipAntimeridian = d3_geo_clip( - d3_true, - d3_geo_clipAntimeridianLine, - d3_geo_clipAntimeridianInterpolate, - d3_geo_clipAntimeridianPolygonContains); - -// 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, - φ0 = NaN, - sλ0 = NaN, - clean; // no intersections - - return { - lineStart: function() { - listener.lineStart(); - clean = 1; - }, - point: function(λ1, φ1) { - var sλ1 = λ1 > 0 ? π : -π, - dλ = Math.abs(λ1 - λ0); - if (Math.abs(dλ - π) < ε) { // line crosses a pole - listener.point(λ0, φ0 = (φ0 + φ1) / 2 > 0 ? π / 2 : -π / 2); - listener.point(sλ0, φ0); - listener.lineEnd(); - listener.lineStart(); - listener.point(sλ1, φ0); - listener.point( λ1, φ0); - clean = 0; - } else if (sλ0 !== sλ1 && dλ >= π) { // line crosses antimeridian - // handle degeneracies - if (Math.abs(λ0 - sλ0) < ε) λ0 -= sλ0 * ε; - if (Math.abs(λ1 - sλ1) < ε) λ1 -= sλ1 * ε; - φ0 = d3_geo_clipAntimeridianIntersect(λ0, φ0, λ1, φ1); - listener.point(sλ0, φ0); - listener.lineEnd(); - listener.lineStart(); - listener.point(sλ1, φ0); - clean = 0; - } - listener.point(λ0 = λ1, φ0 = φ1); - sλ0 = sλ1; - }, - lineEnd: function() { - listener.lineEnd(); - λ0 = φ0 = NaN; - }, - // if there are intersections, we always rejoin the first and last segments. - clean: function() { return 2 - clean; } + if (a.invert && b.invert) compose.invert = function(x, y) { + return x = b.invert(x, y), x && a.invert(x[0], x[1]); }; -} - -function d3_geo_clipAntimeridianIntersect(λ0, φ0, λ1, φ1) { - var cosφ0, - cosφ1, - sinλ0_λ1 = Math.sin(λ0 - λ1); - return Math.abs(sinλ0_λ1) > ε - ? Math.atan((Math.sin(φ0) * (cosφ1 = Math.cos(φ1)) * Math.sin(λ1) - - Math.sin(φ1) * (cosφ0 = Math.cos(φ0)) * Math.sin(λ0)) - / (cosφ0 * cosφ1 * sinλ0_λ1)) - : (φ0 + φ1) / 2; -} - -function d3_geo_clipAntimeridianInterpolate(from, to, direction, listener) { - var φ; - if (from == null) { - φ = direction * π / 2; - listener.point(-π, φ); - listener.point( 0, φ); - listener.point( π, φ); - listener.point( π, 0); - listener.point( π, -φ); - listener.point( 0, -φ); - listener.point(-π, -φ); - listener.point(-π, 0); - listener.point(-π, φ); - } else if (Math.abs(from[0] - to[0]) > ε) { - var s = (from[0] < to[0] ? 1 : -1) * π; - φ = direction * s / 2; - listener.point(-s, φ); - listener.point( 0, φ); - listener.point( s, φ); - } else { - listener.point(to[0], to[1]); - } -} - -var d3_geo_clipAntimeridianPoint = [-π, 0]; -function d3_geo_clipAntimeridianPolygonContains(polygon) { - return d3_geo_pointInPolygon(d3_geo_clipAntimeridianPoint, polygon); + return compose; } function d3_geo_equirectangular(λ, φ) { @@ -2577,17 +2799,23 @@ d3.geo.rotation = function(rotate) { return forward; }; +function d3_geo_identityRotation(λ, φ) { + return [λ > π ? λ - τ : λ < -π ? λ + τ : λ, φ]; +} + +d3_geo_identityRotation.invert = d3_geo_equirectangular; + // Note: |δλ| must be < 2π function d3_geo_rotation(δλ, δφ, δγ) { return δλ ? (δφ || δγ ? d3_geo_compose(d3_geo_rotationλ(δλ), d3_geo_rotationφγ(δφ, δγ)) : d3_geo_rotationλ(δλ)) : (δφ || δγ ? d3_geo_rotationφγ(δφ, δγ) - : d3_geo_equirectangular); + : d3_geo_identityRotation); } function d3_geo_forwardRotationλ(δλ) { return function(λ, φ) { - return λ += δλ, [λ > π ? λ - 2 * π : λ < -π ? λ + 2 * π : λ, φ]; + return λ += δλ, [λ > π ? λ - τ : λ < -π ? λ + τ : λ, φ]; }; } @@ -2678,16 +2906,16 @@ 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 * 2 * π; + if (direction > 0 ? from < to: from > to) from += direction * τ; } else { - from = radius + direction * 2 * π; - to = radius; + from = radius + direction * τ; + to = radius - .5 * step; } - var point; - for (var step = direction * precision, t = from; direction > 0 ? t > to : t < to; t -= step) { + for (var point, t = from; direction > 0 ? t > to : t < to; t -= step) { listener.point((point = d3_geo_spherical([ cr, -sr * Math.cos(t), @@ -2705,20 +2933,183 @@ function d3_geo_circleAngle(cr, point) { 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) +// 305–363 (1997). +// Code adapted from GeographicLib by Charles F. F. Karney, +// http://geographiclib.sourceforge.net/ +// See lib/geographiclib/LICENSE for details. -// Clip features against a small circle centered at [0°, 0°]. -function d3_geo_clipCircle(radius) { - var cr = Math.cos(radius), - smallRadius = cr > 0, - point = [radius, 0], - notHemisphere = Math.abs(cr) > ε, // TODO optimise for this common case - interpolate = d3_geo_circleInterpolate(radius, 6 * d3_radians); - - return d3_geo_clip(visible, clipLine, interpolate, polygonContains); - - function visible(λ, φ) { - return Math.cos(λ) * Math.cos(φ) > cr; - } +function d3_adder() {} + +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; + } +}; + +var d3_adderTemp = new d3_adder; + +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 +} + +d3.geo.area = function(object) { + d3_geo_areaSum = 0; + d3.geo.stream(object, d3_geo_area); + return d3_geo_areaSum; +}; + +var d3_geo_areaSum, + d3_geo_areaRingSum = new d3_adder; + +var d3_geo_area = { + sphere: function() { d3_geo_areaSum += 4 * π; }, + point: d3_noop, + lineStart: d3_noop, + lineEnd: d3_noop, + + // 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 * π + area : area; + d3_geo_area.lineStart = d3_geo_area.lineEnd = d3_geo_area.point = d3_noop; + } +}; + +function d3_geo_areaRingStart() { + var λ00, φ00, λ0, cosφ0, sinφ0; // start point and previous point + + // For the first point, … + d3_geo_area.point = function(λ, φ) { + d3_geo_area.point = nextPoint; + λ0 = (λ00 = λ) * d3_radians, cosφ0 = Math.cos(φ = (φ00 = φ) * d3_radians / 2 + π / 4), sinφ0 = Math.sin(φ); + }; + + // For subsequent points, … + function nextPoint(λ, φ) { + λ *= d3_radians; + φ = φ * d3_radians / 2 + π / 4; // half the angular distance from south pole + + // Spherical excess E for a spherical triangle with vertices: south pole, + // previous point, current point. Uses a formula derived from Cagnoli’s + // theorem. See Todhunter, Spherical Trig. (1871), Sec. 103, Eq. (2). + var dλ = λ - λ0, + sdλ = dλ >= 0 ? 1 : -1, + adλ = sdλ * dλ, + cosφ = Math.cos(φ), + sinφ = Math.sin(φ), + k = sinφ0 * sinφ, + u = cosφ0 * cosφ + k * Math.cos(adλ), + v = k * sdλ * Math.sin(adλ); + d3_geo_areaRingSum.add(Math.atan2(v, u)); + + // Advance the previous points. + λ0 = λ, cosφ0 = cosφ, sinφ0 = sinφ; + } + + // For the last point, return to the start. + d3_geo_area.lineEnd = function() { + nextPoint(λ00, φ00); + }; +} + +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(); + + 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], + φ0 = point0[1] / 2 + π / 4, + sinφ0 = Math.sin(φ0), + cosφ0 = Math.cos(φ0), + j = 1; + + while (true) { + if (j === m) j = 0; + point = ring[j]; + var λ = point[0], + φ = point[1] / 2 + π / 4, + sinφ = Math.sin(φ), + cosφ = Math.cos(φ), + dλ = λ - λ0, + sdλ = dλ >= 0 ? 1 : -1, + adλ = sdλ * dλ, + antimeridian = adλ > π, + k = sinφ0 * sinφ; + d3_geo_areaRingSum.add(Math.atan2(k * sdλ * Math.sin(adλ), cosφ0 * cosφ + k * Math.cos(adλ))); + + polarAngle += antimeridian ? dλ + sdλ * τ : 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 φarc = (antimeridian ^ dλ >= 0 ? -1 : 1) * d3_asin(intersection[2]); + if (parallel > φarc || parallel === φarc && (arc[0] || arc[1])) { + winding += antimeridian ^ dλ >= 0 ? 1 : -1; + } + } + if (!j++) break; + λ0 = λ, sinφ0 = sinφ, cosφ0 = cosφ, point0 = point; + } + } + + // 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. + + return (polarAngle < -ε || polarAngle < ε && d3_geo_areaRingSum < 0) ^ (winding & 1); +} + +// 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); + + return d3_geo_clip(visible, clipLine, interpolate, smallRadius ? [0, -radius] : [-π, radius - π]); + + function visible(λ, φ) { + return Math.cos(λ) * Math.cos(φ) > cr; + } // Takes a line and cuts into visible segments. Return values used for // polygon clipping: @@ -2848,7 +3239,7 @@ function d3_geo_clipCircle(radius) { z; if (λ1 < λ0) z = λ0, λ0 = λ1, λ1 = z; var δλ = λ1 - λ0, - polar = Math.abs(δλ - π) < ε, + polar = abs(δλ - π) < ε, meridian = polar || δλ < ε; if (!polar && φ1 < φ0) z = φ0, φ0 = φ1, φ1 = z; @@ -2856,7 +3247,7 @@ function d3_geo_clipCircle(radius) { // Check that the first point is between a and b. if (meridian ? polar - ? φ0 + φ1 > 0 ^ q[1] < (Math.abs(q[0] - λ0) < ε ? φ0 : φ1) + ? φ0 + φ1 > 0 ^ q[1] < (abs(q[0] - λ0) < ε ? φ0 : φ1) : φ0 <= q[1] && q[1] <= φ1 : δλ > π ^ (λ0 <= q[0] && q[0] <= λ1)) { var q1 = d3_geo_cartesianScale(u, (-w + t) / uu); @@ -2876,18 +3267,101 @@ function d3_geo_clipCircle(radius) { else if (φ > r) code |= 8; // above return code; } +} - function polygonContains(polygon) { - return d3_geo_pointInPolygon(point, polygon); - } +// Liang–Barsky 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; + + 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_clipViewMAX = 1e9; +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; + } + }; + return clipExtent.extent([[0, 0], [960, 500]]); +}; -function d3_geo_clipView(x0, y0, x1, y1) { +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; @@ -2900,28 +3374,30 @@ function d3_geo_clipView(x0, y0, x1, y1) { listener = bufferListener; segments = []; polygon = []; + clean = true; }, polygonEnd: function() { listener = listener_; - if ((segments = d3.merge(segments)).length) { + segments = d3.merge(segments); + var clipStartInside = insidePolygon([x0, y1]), + inside = clean && clipStartInside, + visible = segments.length; + if (inside || visible) { listener.polygonStart(); - d3_geo_clipPolygon(segments, compare, inside, interpolate, listener); + if (inside) { + listener.lineStart(); + interpolate(null, null, 1, listener); + listener.lineEnd(); + } + if (visible) { + d3_geo_clipPolygon(segments, compare, clipStartInside, interpolate, listener); + } listener.polygonEnd(); - } else if (insidePolygon([x0, y0])) { - listener.polygonStart(), listener.lineStart(); - interpolate(null, null, 1, listener); - listener.lineEnd(), listener.polygonEnd(); } segments = polygon = ring = null; } }; - function inside(point) { - var a = corner(point, -1), - i = insidePolygon([a === 0 || a === 3 ? x0 : x1, a > 1 ? y1 : y0]); - return i; - } - function insidePolygon(p) { var wn = 0, // the winding number counter n = polygon.length, @@ -2931,9 +3407,9 @@ function d3_geo_clipView(x0, y0, x1, y1) { 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 && isLeft(a, b, p) > 0) ++wn; + if (b[1] > y && d3_cross2d(a, b, p) > 0) ++wn; } else { - if (b[1] <= y && isLeft(a, b, p) < 0) --wn; + if (b[1] <= y && d3_cross2d(a, b, p) < 0) --wn; } a = b; } @@ -2941,10 +3417,6 @@ function d3_geo_clipView(x0, y0, x1, y1) { return wn !== 0; } - function isLeft(a, b, c) { - return (b[0] - a[0]) * (c[1] - a[1]) - (c[0] - a[0]) * (b[1] - a[1]); - } - function interpolate(from, to, direction, listener) { var a = 0, a1 = 0; if (from == null || @@ -2958,17 +3430,18 @@ function d3_geo_clipView(x0, y0, x1, y1) { } } - function visible(x, y) { + function pointVisible(x, y) { return x0 <= x && x <= x1 && y0 <= y && y <= y1; } function point(x, y) { - if (visible(x, y)) listener.point(x, y); + if (pointVisible(x, y)) listener.point(x, y); } var x__, y__, v__, // first point x_, y_, v_, // previous point - first; + first, + clean; function lineStart() { clip.point = linePoint; @@ -2992,9 +3465,9 @@ function d3_geo_clipView(x0, y0, x1, y1) { } function linePoint(x, y) { - x = Math.max(-d3_geo_clipViewMAX, Math.min(d3_geo_clipViewMAX, x)); - y = Math.max(-d3_geo_clipViewMAX, Math.min(d3_geo_clipViewMAX, y)); - var v = visible(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; @@ -3006,18 +3479,19 @@ function d3_geo_clipView(x0, y0, x1, y1) { } else { if (v && v_) listener.point(x, y); else { - var a = [x_, y_], - b = [x, y]; - if (clipLine(a, b)) { + var l = {a: {x: x_, y: y_}, b: {x: x, y: y}}; + if (clipLine(l)) { if (!v_) { listener.lineStart(); - listener.point(a[0], a[1]); + listener.point(l.a.x, l.a.y); } - listener.point(b[0], b[1]); + 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; } } } @@ -3028,14 +3502,14 @@ function d3_geo_clipView(x0, y0, x1, y1) { }; function corner(p, direction) { - return Math.abs(p[0] - x0) < ε ? direction > 0 ? 0 : 3 - : Math.abs(p[0] - x1) < ε ? direction > 0 ? 2 : 1 - : Math.abs(p[1] - y0) < ε ? direction > 0 ? 1 : 0 - : direction > 0 ? 3 : 2; // Math.abs(p[1] - y1) < ε + 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 } function compare(a, b) { - return comparePoints(a.point, b.point); + return comparePoints(a.x, b.x); } function comparePoints(a, b) { @@ -3047,59 +3521,6 @@ function d3_geo_clipView(x0, y0, x1, y1) { : ca === 2 ? a[1] - b[1] : b[0] - a[0]; } - - // Liang–Barsky line clipping. - function clipLine(a, b) { - var dx = b[0] - a[0], - dy = b[1] - a[1], - t = [0, 1]; - - if (Math.abs(dx) < ε && Math.abs(dy) < ε) return x0 <= a[0] && a[0] <= x1 && y0 <= a[1] && a[1] <= y1; - - if (d3_geo_clipViewT(x0 - a[0], dx, t) && - d3_geo_clipViewT(a[0] - x1, -dx, t) && - d3_geo_clipViewT(y0 - a[1], dy, t) && - d3_geo_clipViewT(a[1] - y1, -dy, t)) { - if (t[1] < 1) { - b[0] = a[0] + t[1] * dx; - b[1] = a[1] + t[1] * dy; - } - if (t[0] > 0) { - a[0] += t[0] * dx; - a[1] += t[0] * dy; - } - return true; - } - - return false; - } -} - -function d3_geo_clipViewT(num, denominator, t) { - if (Math.abs(denominator) < ε) return num <= 0; - - var u = num / denominator; - - if (denominator > 0) { - if (u > t[1]) return false; - if (u > t[0]) t[0] = u; - } else { - if (u < t[0]) return false; - if (u < t[1]) t[1] = u; - } - return true; -} -function d3_geo_compose(a, b) { - - function compose(x, y) { - return x = a(x, y), b(x[0], x[1]); - } - - if (a.invert && b.invert) compose.invert = function(x, y) { - return x = b.invert(x, y), x && a.invert(x[0], x[1]); - }; - - return compose; } function d3_geo_conic(projectAt) { @@ -3330,7 +3751,7 @@ d3.geo.bounds = (function() { var dλ = λ - λ_, s = dλ > 0 ? 1 : -1, λi = inflection[0] * d3_degrees * s, - antimeridian = Math.abs(dλ) > 180; + antimeridian = abs(dλ) > 180; if (antimeridian ^ (s * λ_ < λi && λi < s * λ)) { var φi = inflection[1] * d3_degrees; if (φi > φ1) φ1 = φi; @@ -3375,7 +3796,7 @@ d3.geo.bounds = (function() { function ringPoint(λ, φ) { if (p0) { var dλ = λ - λ_; - dλSum += Math.abs(dλ) > 180 ? dλ + (dλ > 0 ? 360 : -360) : dλ; + dλSum += abs(dλ) > 180 ? dλ + (dλ > 0 ? 360 : -360) : dλ; } else λ__ = λ, φ__ = φ; d3_geo_area.point(λ, φ); linePoint(λ, φ); @@ -3388,7 +3809,7 @@ d3.geo.bounds = (function() { function ringEnd() { ringPoint(λ__, φ__); d3_geo_area.lineEnd(); - if (Math.abs(dλSum) > ε) λ0 = -(λ1 = 180); + if (abs(dλSum) > ε) λ0 = -(λ1 = 180); range[0] = λ0, range[1] = λ1; p0 = null; } @@ -3601,7 +4022,7 @@ var d3_geo_pathAreaSum, d3_geo_pathAreaPolygon, d3_geo_pathArea = { }, polygonEnd: function() { d3_geo_pathArea.lineStart = d3_geo_pathArea.lineEnd = d3_geo_pathArea.point = d3_noop; - d3_geo_pathAreaSum += Math.abs(d3_geo_pathAreaPolygon / 2); + d3_geo_pathAreaSum += abs(d3_geo_pathAreaPolygon / 2); } }; @@ -3805,8 +4226,8 @@ function d3_geo_pathContext(context) { }; function point(x, y) { - context.moveTo(x, y); - context.arc(x, y, pointRadius, 0, 2 * π); + context.moveTo(x + pointRadius, y); + context.arc(x, y, pointRadius, 0, τ); } function pointLineStart(x, y) { @@ -3835,6 +4256,17 @@ function d3_geo_resample(project) { maxDepth = 16; function resample(stream) { + return (maxDepth ? resampleRecursive : resampleNone)(stream); + } + + function resampleNone(stream) { + return d3_geo_transformPoint(stream, function(x, y) { + x = project(x, y); + stream.point(x[0], x[1]); + }); + } + + function resampleRecursive(stream) { var λ00, φ00, x00, y00, a00, b00, c00, // first point λ0, x0, y0, a0, b0, c0; // previous point @@ -3898,7 +4330,7 @@ function d3_geo_resample(project) { c = c0 + c1, m = Math.sqrt(a * a + b * b + c * c), φ2 = Math.asin(c /= m), - λ2 = Math.abs(Math.abs(c) - 1) < ε ? (λ0 + λ1) / 2 : Math.atan2(b, a), + λ2 = abs(abs(c) - 1) < ε || abs(λ0 - λ1) < ε ? (λ0 + λ1) / 2 : Math.atan2(b, a), p = project(λ2, φ2), x2 = p[0], y2 = p[1], @@ -3906,7 +4338,7 @@ function d3_geo_resample(project) { dy2 = y2 - y0, dz = dy * dx2 - dx * dy2; if (dz * dz / d2 > δ2 // perpendicular projected distance - || Math.abs((dx * dx2 + dy * dy2) / d2 - .5) > .3 // midpoint close to an end + || 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); @@ -3992,17 +4424,41 @@ d3.geo.path = function() { }; function d3_geo_pathProjectStream(project) { - var resample = d3_geo_resample(function(λ, φ) { return project([λ * d3_degrees, φ * d3_degrees]); }); - return function(stream) { - stream = resample(stream); - return { - point: function(λ, φ) { stream.point(λ * d3_radians, φ * d3_radians); }, - sphere: function() { stream.sphere(); }, - lineStart: function() { stream.lineStart(); }, - lineEnd: function() { stream.lineEnd(); }, - polygonStart: function() { stream.polygonStart(); }, - polygonEnd: function() { stream.polygonEnd(); } - }; + 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)); }; +} + +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; + } + }; +}; + +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(); }, }; } @@ -4041,7 +4497,7 @@ function d3_geo_projectionMutator(projectAt) { projection.stream = function(output) { if (stream) stream.valid = false; - stream = d3_geo_projectionRadiansRotate(rotate, preclip(projectResample(postclip(output)))); + stream = d3_geo_projectionRadians(preclip(rotate, projectResample(postclip(output)))); stream.valid = true; // allow caching by d3.geo.path return stream; }; @@ -4055,7 +4511,7 @@ function d3_geo_projectionMutator(projectAt) { projection.clipExtent = function(_) { if (!arguments.length) return clipExtent; clipExtent = _; - postclip = _ == null ? d3_identity : d3_geo_clipView(_[0][0], _[0][1], _[1][0], _[1][1]); + postclip = _ ? d3_geo_clipExtent(_[0][0], _[0][1], _[1][0], _[1][1]) : d3_identity; return invalidate(); }; @@ -4098,10 +4554,7 @@ function d3_geo_projectionMutator(projectAt) { } function invalidate() { - if (stream) { - stream.valid = false; - stream = null; - } + if (stream) stream.valid = false, stream = null; return projection; } @@ -4112,18 +4565,10 @@ function d3_geo_projectionMutator(projectAt) { }; } -function d3_geo_projectionRadiansRotate(rotate, stream) { - return { - point: function(x, y) { - y = rotate(x * d3_radians, y * d3_radians), x = y[0]; - stream.point(x > π ? x - 2 * π : x < -π ? x + 2 * π : x, y[1]); - }, - sphere: function() { stream.sphere(); }, - lineStart: function() { stream.lineStart(); }, - lineEnd: function() { stream.lineEnd(); }, - polygonStart: function() { stream.polygonStart(); }, - polygonEnd: function() { stream.polygonEnd(); } - }; +function d3_geo_projectionRadians(stream) { + return d3_geo_transformPoint(stream, function(x, y) { + stream.point(x * d3_radians, y * d3_radians); + }); } function d3_geo_mercator(λ, φ) { @@ -4131,7 +4576,7 @@ function d3_geo_mercator(λ, φ) { } d3_geo_mercator.invert = function(x, y) { - return [x, 2 * Math.atan(Math.exp(y)) - π / 2]; + return [x, 2 * Math.atan(Math.exp(y)) - halfπ]; }; function d3_geo_mercatorProjection(project) { @@ -4274,118 +4719,149 @@ function d3_geom_polygonClosed(coordinates) { b = coordinates[coordinates.length - 1]; return !(a[0] - b[0] || a[1] - b[1]); } +function d3_geom_pointX(d) { + return d[0]; +} -var d3_ease_default = function() { return d3_identity; }; +function d3_geom_pointY(d) { + return d[1]; +} -var d3_ease = d3.map({ - linear: d3_ease_default, - poly: d3_ease_poly, - quad: function() { return d3_ease_quad; }, - cubic: function() { return d3_ease_cubic; }, - sin: function() { return d3_ease_sin; }, - exp: function() { return d3_ease_exp; }, - circle: function() { return d3_ease_circle; }, - elastic: d3_ease_elastic, - back: d3_ease_back, - bounce: function() { return d3_ease_bounce; } -}); +/** + * 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; -var d3_ease_mode = d3.map({ - "in": d3_identity, - "out": d3_ease_reverse, - "in-out": d3_ease_reflect, - "out-in": function(f) { return d3_ease_reflect(d3_ease_reverse(f)); } -}); + if (arguments.length) return hull(vertices); -d3.ease = function(name) { - var i = name.indexOf("-"), - t = i >= 0 ? name.substring(0, i) : name, - m = i >= 0 ? name.substring(i + 1) : "in"; - t = d3_ease.get(t) || d3_ease_default; - m = d3_ease_mode.get(m) || d3_identity; - return d3_ease_clamp(m(t.apply(null, Array.prototype.slice.call(arguments, 1)))); -}; + function hull(data) { + // Hull of < 3 points is not well-defined + if (data.length < 3) return []; -function d3_ease_clamp(f) { - return function(t) { - return t <= 0 ? 0 : t >= 1 ? 1 : f(t); - }; -} + var fx = d3_functor(x), + fy = d3_functor(y), + i, + n = data.length, + points = [], // of the form [[x0, y0, 0], ..., [xn, yn, n]] + flippedPoints = []; -function d3_ease_reverse(f) { - return function(t) { - return 1 - f(1 - t); + for (i = 0 ; i < n; i++) { + points.push([+fx.call(this, data[i], i), +fy.call(this, data[i], i), i]); + } + + // 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 = []; + + // 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]]); + + return polygon; + } + + hull.x = function(_) { + return arguments.length ? (x = _, hull) : x; }; -} -function d3_ease_reflect(f) { - return function(t) { - return .5 * (t < .5 ? f(2 * t) : (2 - f(2 - 2 * t))); + hull.y = function(_) { + return arguments.length ? (y = _, hull) : y; }; -} -function d3_ease_quad(t) { - return t * t; -} + return hull; +}; -function d3_ease_cubic(t) { - return t * t * t; -} +// 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 -// Optimized clamp(reflect(poly(3))). -function d3_ease_cubicInOut(t) { - if (t <= 0) return 0; - if (t >= 1) return 1; - var t2 = t * t, t3 = t2 * t; - return 4 * (t < .5 ? t3 : 3 * (t - t2) + t3 - .75); -} + 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; + } -function d3_ease_poly(e) { - return function(t) { - return Math.pow(t, e); - }; + // we slice to make sure that the points we 'popped' from hull don't stay behind + return hull.slice(0, hs); } -function d3_ease_sin(t) { - return 1 - Math.cos(t * π / 2); +// 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"; -function d3_ease_exp(t) { - return Math.pow(2, 10 * (t - 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}; -function d3_ease_circle(t) { - return 1 - Math.sqrt(1 - t * t); -} + 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); + } + } -function d3_ease_elastic(a, p) { - var s; - if (arguments.length < 2) p = 0.45; - if (arguments.length) s = p / (2 * π) * Math.asin(1 / a); - else a = 1, s = p / 4; - return function(t) { - return 1 + a * Math.pow(2, 10 * -t) * Math.sin((t - s) * 2 * π / p); - }; -} + return d3_transition(subgroups, ns, id); +}; +// import "../transition/transition"; -function d3_ease_back(s) { - if (!s) s = 1.70158; - return function(t) { - return t * t * ((s + 1) * t - s); - }; -} +// 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))); +}; -function d3_ease_bounce(t) { - return t < 1 / 2.75 ? 7.5625 * t * t - : t < 2 / 2.75 ? 7.5625 * (t -= 1.5 / 2.75) * t + .75 - : t < 2.5 / 2.75 ? 7.5625 * (t -= 2.25 / 2.75) * t + .9375 - : 7.5625 * (t -= 2.625 / 2.75) * t + .984375; +var d3_selection_interrupt = d3_selection_interruptNS(d3_transitionNamespace()); + +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); + } + }; } -function d3_transition(groups, id) { +function d3_transition(groups, ns, id) { d3_subclass(groups, d3_transitionPrototype); - groups.id = id; // Note: read-only! + // Note: read-only! + groups.namespace = ns; + groups.id = id; return groups; } @@ -4400,10 +4876,10 @@ d3_transitionPrototype.empty = d3_selectionPrototype.empty; d3_transitionPrototype.node = d3_selectionPrototype.node; d3_transitionPrototype.size = d3_selectionPrototype.size; -d3.transition = function(selection) { - return arguments.length - ? (d3_transitionInheritId ? selection.transition() : selection) - : d3_selectionRoot.transition(); +d3.transition = function(selection, name) { + return selection && selection.transition + ? (d3_transitionInheritId ? selection.transition(name) : selection) + : d3.selection().transition(selection); }; d3.transition.prototype = d3_transitionPrototype; @@ -4411,6 +4887,7 @@ d3.transition.prototype = d3_transitionPrototype; d3_transitionPrototype.select = function(selector) { var id = this.id, + ns = this.namespace, subgroups = [], subgroup, subnode, @@ -4423,7 +4900,7 @@ d3_transitionPrototype.select = function(selector) { 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, id, node.__transition__[id]); + d3_transitionNode(subnode, i, ns, id, node[ns][id]); subgroup.push(subnode); } else { subgroup.push(null); @@ -4431,11 +4908,12 @@ d3_transitionPrototype.select = function(selector) { } } - return d3_transition(subgroups, id); + return d3_transition(subgroups, ns, id); }; d3_transitionPrototype.selectAll = function(selector) { var id = this.id, + ns = this.namespace, subgroups = [], subgroup, subnodes, @@ -4448,18 +4926,18 @@ d3_transitionPrototype.selectAll = function(selector) { 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.__transition__[id]; + 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, id, transition); + if (subnode = subnodes[k]) d3_transitionNode(subnode, k, ns, id, transition); subgroup.push(subnode); } } } } - return d3_transition(subgroups, id); + return d3_transition(subgroups, ns, id); }; d3_transitionPrototype.filter = function(filter) { @@ -4473,47 +4951,41 @@ d3_transitionPrototype.filter = function(filter) { 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)) { + if ((node = group[i]) && filter.call(node, node.__data__, i, j)) { subgroup.push(node); } } } - return d3_transition(subgroups, this.id); + return d3_transition(subgroups, this.namespace, this.id); }; -function d3_Color() {} +d3.color = d3_color; -d3_Color.prototype.toString = function() { +function d3_color() {} + +d3_color.prototype.toString = function() { return this.rgb() + ""; }; -d3.hsl = function(h, s, l) { - return arguments.length === 1 - ? (h instanceof d3_Hsl ? d3_hsl(h.h, h.s, h.l) - : d3_rgb_parse("" + h, d3_rgb_hsl, d3_hsl)) - : d3_hsl(+h, +s, +l); -}; +d3.hsl = d3_hsl; function d3_hsl(h, s, l) { - return new d3_Hsl(h, s, l); -} - -function d3_Hsl(h, s, l) { - this.h = h; - this.s = s; - this.l = 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); } -var d3_hslPrototype = d3_Hsl.prototype = new d3_Color; +var d3_hslPrototype = d3_hsl.prototype = new d3_color; d3_hslPrototype.brighter = function(k) { k = Math.pow(0.7, arguments.length ? k : 1); - return d3_hsl(this.h, this.s, this.l / k); + return new d3_hsl(this.h, this.s, this.l / k); }; d3_hslPrototype.darker = function(k) { k = Math.pow(0.7, arguments.length ? k : 1); - return d3_hsl(this.h, this.s, k * this.l); + return new d3_hsl(this.h, this.s, k * this.l); }; d3_hslPrototype.rgb = function() { @@ -4546,35 +5018,27 @@ function d3_hsl_rgb(h, s, l) { return Math.round(v(h) * 255); } - return d3_rgb(vv(h + 120), vv(h), vv(h - 120)); + return new d3_rgb(vv(h + 120), vv(h), vv(h - 120)); } -d3.hcl = function(h, c, l) { - return arguments.length === 1 - ? (h instanceof d3_Hcl ? 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))) - : d3_hcl(+h, +c, +l); -}; +d3.hcl = d3_hcl; function d3_hcl(h, c, l) { - return new d3_Hcl(h, c, l); -} - -function d3_Hcl(h, c, l) { - this.h = h; - this.c = c; - this.l = 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); } -var d3_hclPrototype = d3_Hcl.prototype = new d3_Color; +var d3_hclPrototype = d3_hcl.prototype = new d3_color; d3_hclPrototype.brighter = function(k) { - return d3_hcl(this.h, this.c, Math.min(100, this.l + d3_lab_K * (arguments.length ? k : 1))); + return new d3_hcl(this.h, this.c, Math.min(100, this.l + d3_lab_K * (arguments.length ? k : 1))); }; d3_hclPrototype.darker = function(k) { - return d3_hcl(this.h, this.c, Math.max(0, this.l - d3_lab_K * (arguments.length ? k : 1))); + return new d3_hcl(this.h, this.c, Math.max(0, this.l - d3_lab_K * (arguments.length ? k : 1))); }; d3_hclPrototype.rgb = function() { @@ -4584,25 +5048,17 @@ d3_hclPrototype.rgb = function() { function d3_hcl_lab(h, c, l) { if (isNaN(h)) h = 0; if (isNaN(c)) c = 0; - return d3_lab(l, Math.cos(h *= d3_radians) * c, Math.sin(h) * c); + return new d3_lab(l, Math.cos(h *= d3_radians) * c, Math.sin(h) * c); } -d3.lab = function(l, a, b) { - return arguments.length === 1 - ? (l instanceof d3_Lab ? d3_lab(l.l, l.a, l.b) - : (l instanceof d3_Hcl ? d3_hcl_lab(l.l, l.c, l.h) - : d3_rgb_lab((l = d3.rgb(l)).r, l.g, l.b))) - : d3_lab(+l, +a, +b); -}; +d3.lab = d3_lab; function d3_lab(l, a, b) { - return new d3_Lab(l, a, b); -} - -function d3_Lab(l, a, b) { - this.l = l; - this.a = a; - this.b = 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); } // Corresponds roughly to RGB brighter/darker @@ -4613,14 +5069,14 @@ var d3_lab_X = 0.950470, d3_lab_Y = 1, d3_lab_Z = 1.088830; -var d3_labPrototype = d3_Lab.prototype = new d3_Color; +var d3_labPrototype = d3_lab.prototype = new d3_color; d3_labPrototype.brighter = function(k) { - return d3_lab(Math.min(100, this.l + d3_lab_K * (arguments.length ? k : 1)), this.a, this.b); + return new d3_lab(Math.min(100, this.l + d3_lab_K * (arguments.length ? k : 1)), this.a, this.b); }; d3_labPrototype.darker = function(k) { - return d3_lab(Math.max(0, this.l - d3_lab_K * (arguments.length ? k : 1)), this.a, this.b); + return new d3_lab(Math.max(0, this.l - d3_lab_K * (arguments.length ? k : 1)), this.a, this.b); }; d3_labPrototype.rgb = function() { @@ -4634,7 +5090,7 @@ function d3_lab_rgb(l, a, b) { 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 d3_rgb( + 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) @@ -4643,8 +5099,8 @@ function d3_lab_rgb(l, a, b) { function d3_lab_hcl(l, a, b) { return l > 0 - ? d3_hcl(Math.atan2(b, a) * d3_degrees, Math.sqrt(a * a + b * b), l) - : d3_hcl(NaN, NaN, l); + ? new d3_hcl(Math.atan2(b, a) * d3_degrees, Math.sqrt(a * a + b * b), l) + : new d3_hcl(NaN, NaN, l); } function d3_lab_xyz(x) { @@ -4658,32 +5114,24 @@ 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)); } -d3.rgb = function(r, g, b) { - return arguments.length === 1 - ? (r instanceof d3_Rgb ? d3_rgb(r.r, r.g, r.b) +d3.rgb = d3_rgb; + +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)) - : d3_rgb(~~r, ~~g, ~~b); -}; + : new d3_rgb(r, g, b); +} function d3_rgbNumber(value) { - return d3_rgb(value >> 16, value >> 8 & 0xff, value & 0xff); + return new d3_rgb(value >> 16, value >> 8 & 0xff, value & 0xff); } function d3_rgbString(value) { return d3_rgbNumber(value) + ""; } -function d3_rgb(r, g, b) { - return new d3_Rgb(r, g, b); -} - -function d3_Rgb(r, g, b) { - this.r = r; - this.g = g; - this.b = b; -} - -var d3_rgbPrototype = d3_Rgb.prototype = new d3_Color; +var d3_rgbPrototype = d3_rgb.prototype = new d3_color; d3_rgbPrototype.brighter = function(k) { k = Math.pow(0.7, arguments.length ? k : 1); @@ -4691,16 +5139,16 @@ d3_rgbPrototype.brighter = function(k) { g = this.g, b = this.b, i = 30; - if (!r && !g && !b) return d3_rgb(i, i, i); + 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 d3_rgb(Math.min(255, ~~(r / k)), Math.min(255, ~~(g / k)), Math.min(255, ~~(b / k))); + return new d3_rgb(Math.min(255, r / k), Math.min(255, g / k), Math.min(255, b / k)); }; d3_rgbPrototype.darker = function(k) { k = Math.pow(0.7, arguments.length ? k : 1); - return d3_rgb(~~(k * this.r), ~~(k * this.g), ~~(k * this.b)); + return new d3_rgb(k * this.r, k * this.g, k * this.b); }; d3_rgbPrototype.hsl = function() { @@ -4723,7 +5171,7 @@ function d3_rgb_parse(format, rgb, hsl) { b = 0, // blue channel; int in [0, 255] m1, // CSS color specification match m2, // CSS color specification type (e.g., rgb) - name; + color; /* Handle hsl, rgb. */ m1 = /([a-z]+)\((.*)\)/i.exec(format); @@ -4748,22 +5196,21 @@ function d3_rgb_parse(format, rgb, hsl) { } /* Named colors. */ - if (name = d3_rgb_names.get(format)) return rgb(name.r, name.g, name.b); + if (color = d3_rgb_names.get(format.toLowerCase())) { + return rgb(color.r, color.g, color.b); + } /* Hexadecimal colors: #rgb and #rrggbb. */ - if (format != null && format.charAt(0) === "#") { + if (format != null && format.charAt(0) === "#" && !isNaN(color = parseInt(format.slice(1), 16))) { if (format.length === 4) { - r = format.charAt(1); r += r; - g = format.charAt(2); g += g; - b = format.charAt(3); b += b; + r = (color & 0xf00) >> 4; r = (r >> 4) | r; + g = (color & 0xf0); g = (g >> 4) | g; + b = (color & 0xf); b = (b << 4) | b; } else if (format.length === 7) { - r = format.substring(1, 3); - g = format.substring(3, 5); - b = format.substring(5, 7); + r = (color & 0xff0000) >> 16; + g = (color & 0xff00) >> 8; + b = (color & 0xff); } - r = parseInt(r, 16); - g = parseInt(g, 16); - b = parseInt(b, 16); } return rgb(r, g, b); @@ -4786,7 +5233,7 @@ function d3_rgb_hsl(r, g, b) { h = NaN; s = l > 0 && l < 1 ? 0 : h; } - return d3_hsl(h, s, l); + return new d3_hsl(h, s, l); } function d3_rgb_lab(r, g, b) { @@ -4928,6 +5375,7 @@ var d3_rgb_names = d3.map({ plum: 0xdda0dd, powderblue: 0xb0e0e6, purple: 0x800080, + rebeccapurple: 0x663399, red: 0xff0000, rosybrown: 0xbc8f8f, royalblue: 0x4169e1, @@ -5025,96 +5473,62 @@ function d3_interpolateArray(a, b) { d3.interpolateNumber = d3_interpolateNumber; function d3_interpolateNumber(a, b) { - b -= a = +a; - return function(t) { return a + b * t; }; + a = +a, b = +b; + return function(t) { return a * (1 - t) + b * t; }; } d3.interpolateString = d3_interpolateString; function d3_interpolateString(a, b) { - var m, // current match - i, // current index - j, // current index (for coalescing) - s0 = 0, // start index of current string prefix - s1 = 0, // end index of current string prefix + var bi = d3_interpolate_numberA.lastIndex = d3_interpolate_numberB.lastIndex = 0, // scan index for next number in b + am, // current match in a + bm, // current match in b + bs, // string preceding current number in b, if any + i = -1, // index in s s = [], // string constants and placeholders - q = [], // number interpolators - n, // q.length - o; + q = []; // number interpolators // Coerce inputs to strings. a = a + "", b = b + ""; - // Reset our regular expression! - d3_interpolate_number.lastIndex = 0; - - // Find all numbers in b. - for (i = 0; m = d3_interpolate_number.exec(b); ++i) { - if (m.index) s.push(b.substring(s0, s1 = m.index)); - q.push({i: s.length, x: m[0]}); - s.push(null); - s0 = d3_interpolate_number.lastIndex; - } - if (s0 < b.length) s.push(b.substring(s0)); - - // Find all numbers in a. - for (i = 0, n = q.length; (m = d3_interpolate_number.exec(a)) && i < n; ++i) { - o = q[i]; - if (o.x == m[0]) { // The numbers match, so coalesce. - if (o.i) { - if (s[o.i + 1] == null) { // This match is followed by another number. - s[o.i - 1] += o.x; - s.splice(o.i, 1); - for (j = i + 1; j < n; ++j) q[j].i--; - } else { // This match is followed by a string, so coalesce twice. - s[o.i - 1] += o.x + s[o.i + 1]; - s.splice(o.i, 2); - for (j = i + 1; j < n; ++j) q[j].i -= 2; - } - } else { - if (s[o.i + 1] == null) { // This match is followed by another number. - s[o.i] = o.x; - } else { // This match is followed by a string, so coalesce twice. - s[o.i] = o.x + s[o.i + 1]; - s.splice(o.i + 1, 1); - for (j = i + 1; j < n; ++j) q[j].i--; - } - } - q.splice(i, 1); - n--; - i--; - } else { - o.x = d3_interpolateNumber(parseFloat(m[0]), parseFloat(o.x)); + // Interpolate pairs of numbers in a & b. + while ((am = d3_interpolate_numberA.exec(a)) + && (bm = d3_interpolate_numberB.exec(b))) { + if ((bs = bm.index) > bi) { // a string precedes the next number in b + bs = b.slice(bi, bs); + if (s[i]) s[i] += bs; // coalesce with previous string + else s[++i] = bs; } - } - - // Remove any numbers in b not found in a. - while (i < n) { - o = q.pop(); - if (s[o.i + 1] == null) { // This match is followed by another number. - s[o.i] = o.x; - } else { // This match is followed by a string, so coalesce twice. - s[o.i] = o.x + s[o.i + 1]; - s.splice(o.i + 1, 1); + if ((am = am[0]) === (bm = bm[0])) { // numbers in a & b match + if (s[i]) s[i] += bm; // coalesce with previous string + else s[++i] = bm; + } else { // interpolate non-matching numbers + s[++i] = null; + q.push({i: i, x: d3_interpolateNumber(am, bm)}); } - n--; + bi = d3_interpolate_numberB.lastIndex; } - // Special optimization for only a single match. - if (s.length === 1) { - return s[0] == null - ? (o = q[0].x, function(t) { return o(t) + ""; }) - : function() { return b; }; + // Add remains of b. + if (bi < b.length) { + bs = b.slice(bi); + if (s[i]) s[i] += bs; // coalesce with previous string + else s[++i] = bs; } + // Special optimization for only a single match. // Otherwise, interpolate each of the numbers and rejoin the string. - return function(t) { - for (i = 0; i < n; ++i) s[(o = q[i]).i] = o.x(t); - return s.join(""); - }; + return s.length < 2 + ? (q[0] ? (b = q[0].x, function(t) { return b(t) + ""; }) + : function() { return b; }) + : (b = q.length, function(t) { + for (var i = 0, o; i < b; ++i) s[(o = q[i]).i] = o.x(t); + return s.join(""); + }); } -var d3_interpolate_number = /[-+]?(?:\d+\.?\d*|\.?\d+)(?:[eE][-+]?\d+)?/g; +var d3_interpolate_numberA = /[-+]?(?:\d+\.?\d*|\.?\d+)(?:[eE][-+]?\d+)?/g, + d3_interpolate_numberB = new RegExp(d3_interpolate_numberA.source, "g"); d3.interpolate = d3_interpolate; @@ -5128,8 +5542,9 @@ d3.interpolators = [ function(a, b) { var t = typeof b; return (t === "string" ? (d3_rgb_names.has(b) || /^(#|rgb\(|hsl\()/.test(b) ? d3_interpolateRgb : d3_interpolateString) - : b instanceof d3_Color ? d3_interpolateRgb - : t === "object" ? (Array.isArray(b) ? d3_interpolateArray : d3_interpolateObject) + : b instanceof d3_color ? d3_interpolateRgb + : Array.isArray(b) ? d3_interpolateArray + : t === "object" && isNaN(b) ? d3_interpolateObject : d3_interpolateNumber)(a, b); } ]; @@ -5251,18 +5666,18 @@ function d3_interpolateTransform(a, b) { } d3_transitionPrototype.tween = function(name, tween) { - var id = this.id; - if (arguments.length < 2) return this.node().__transition__[id].tween.get(name); + var id = this.id, ns = this.namespace; + if (arguments.length < 2) return this.node()[ns][id].tween.get(name); return d3_selection_each(this, tween == null - ? function(node) { node.__transition__[id].tween.remove(name); } - : function(node) { node.__transition__[id].tween.set(name, tween); }); + ? function(node) { node[ns][id].tween.remove(name); } + : function(node) { node[ns][id].tween.set(name, tween); }); }; function d3_transition_tween(groups, name, value, tween) { - var id = groups.id; + var id = groups.id, ns = groups.namespace; return d3_selection_each(groups, typeof value === "function" - ? function(node, i, j) { node.__transition__[id].tween.set(name, tween(value.call(node, node.__data__, i, j))); } - : (value = tween(value), function(node) { node.__transition__[id].tween.set(name, value); })); + ? function(node, i, j) { node[ns][id].tween.set(name, tween(value.call(node, node.__data__, i, j))); } + : (value = tween(value), function(node) { node[ns][id].tween.set(name, value); })); } d3_transitionPrototype.attr = function(nameNS, value) { @@ -5348,7 +5763,7 @@ d3_transitionPrototype.style = function(name, value, priority) { // Otherwise, a name, value and priority are specified, and handled as below. function styleString(b) { return b == null ? styleNull : (b += "", function() { - var a = d3_window.getComputedStyle(this, null).getPropertyValue(name), i; + var a = d3_window(this).getComputedStyle(this, null).getPropertyValue(name), i; return a !== b && (i = d3_interpolate(a, b), function(t) { this.style.setProperty(name, i(t), priority); }); }); } @@ -5360,7 +5775,7 @@ d3_transitionPrototype.styleTween = function(name, tween, priority) { if (arguments.length < 3) priority = ""; function styleTween(d, i) { - var f = tween.call(this, d, i, d3_window.getComputedStyle(this, null).getPropertyValue(name)); + var f = tween.call(this, d, i, d3_window(this).getComputedStyle(this, null).getPropertyValue(name)); return f && function(t) { this.style.setProperty(name, f(t), priority); }; } @@ -5377,49 +5792,162 @@ function d3_transition_text(b) { } d3_transitionPrototype.remove = function() { + var ns = this.namespace; return this.each("end.transition", function() { var p; - if (!this.__transition__ && (p = this.parentNode)) p.removeChild(this); + if (this[ns].count < 2 && (p = this.parentNode)) p.removeChild(this); }); }; +var d3_ease_default = function() { return d3_identity; }; + +var d3_ease = d3.map({ + linear: d3_ease_default, + poly: d3_ease_poly, + quad: function() { return d3_ease_quad; }, + cubic: function() { return d3_ease_cubic; }, + sin: function() { return d3_ease_sin; }, + exp: function() { return d3_ease_exp; }, + circle: function() { return d3_ease_circle; }, + elastic: d3_ease_elastic, + back: d3_ease_back, + bounce: function() { return d3_ease_bounce; } +}); + +var d3_ease_mode = d3.map({ + "in": d3_identity, + "out": d3_ease_reverse, + "in-out": d3_ease_reflect, + "out-in": function(f) { return d3_ease_reflect(d3_ease_reverse(f)); } +}); + +d3.ease = function(name) { + var i = name.indexOf("-"), + t = i >= 0 ? name.slice(0, i) : name, + m = i >= 0 ? name.slice(i + 1) : "in"; + t = d3_ease.get(t) || d3_ease_default; + m = d3_ease_mode.get(m) || d3_identity; + return d3_ease_clamp(m(t.apply(null, d3_arraySlice.call(arguments, 1)))); +}; + +function d3_ease_clamp(f) { + return function(t) { + return t <= 0 ? 0 : t >= 1 ? 1 : f(t); + }; +} + +function d3_ease_reverse(f) { + return function(t) { + return 1 - f(1 - t); + }; +} + +function d3_ease_reflect(f) { + return function(t) { + return .5 * (t < .5 ? f(2 * t) : (2 - f(2 - 2 * t))); + }; +} + +function d3_ease_quad(t) { + return t * t; +} + +function d3_ease_cubic(t) { + return t * t * t; +} + +// Optimized clamp(reflect(poly(3))). +function d3_ease_cubicInOut(t) { + if (t <= 0) return 0; + if (t >= 1) return 1; + var t2 = t * t, t3 = t2 * t; + return 4 * (t < .5 ? t3 : 3 * (t - t2) + t3 - .75); +} + +function d3_ease_poly(e) { + return function(t) { + return Math.pow(t, e); + }; +} + +function d3_ease_sin(t) { + return 1 - Math.cos(t * halfπ); +} + +function d3_ease_exp(t) { + return Math.pow(2, 10 * (t - 1)); +} + +function d3_ease_circle(t) { + return 1 - Math.sqrt(1 - t * t); +} + +function d3_ease_elastic(a, p) { + var s; + if (arguments.length < 2) p = 0.45; + if (arguments.length) s = p / τ * Math.asin(1 / a); + else a = 1, s = p / 4; + return function(t) { + return 1 + a * Math.pow(2, -10 * t) * Math.sin((t - s) * τ / p); + }; +} + +function d3_ease_back(s) { + if (!s) s = 1.70158; + return function(t) { + return t * t * ((s + 1) * t - s); + }; +} + +function d3_ease_bounce(t) { + return t < 1 / 2.75 ? 7.5625 * t * t + : t < 2 / 2.75 ? 7.5625 * (t -= 1.5 / 2.75) * t + .75 + : t < 2.5 / 2.75 ? 7.5625 * (t -= 2.25 / 2.75) * t + .9375 + : 7.5625 * (t -= 2.625 / 2.75) * t + .984375; +} + d3_transitionPrototype.ease = function(value) { - var id = this.id; - if (arguments.length < 1) return this.node().__transition__[id].ease; + var id = this.id, ns = this.namespace; + if (arguments.length < 1) return this.node()[ns][id].ease; if (typeof value !== "function") value = d3.ease.apply(d3, arguments); - return d3_selection_each(this, function(node) { node.__transition__[id].ease = value; }); + return d3_selection_each(this, function(node) { node[ns][id].ease = value; }); }; d3_transitionPrototype.delay = function(value) { - var id = this.id; + var id = this.id, ns = this.namespace; + if (arguments.length < 1) return this.node()[ns][id].delay; return d3_selection_each(this, typeof value === "function" - ? function(node, i, j) { node.__transition__[id].delay = value.call(node, node.__data__, i, j) | 0; } - : (value |= 0, function(node) { node.__transition__[id].delay = value; })); + ? function(node, i, j) { node[ns][id].delay = +value.call(node, node.__data__, i, j); } + : (value = +value, function(node) { node[ns][id].delay = value; })); }; d3_transitionPrototype.duration = function(value) { - var id = this.id; + var id = this.id, ns = this.namespace; + if (arguments.length < 1) return this.node()[ns][id].duration; return d3_selection_each(this, typeof value === "function" - ? function(node, i, j) { node.__transition__[id].duration = Math.max(1, value.call(node, node.__data__, i, j) | 0); } - : (value = Math.max(1, value | 0), function(node) { node.__transition__[id].duration = value; })); + ? function(node, i, j) { node[ns][id].duration = Math.max(1, value.call(node, node.__data__, i, j)); } + : (value = Math.max(1, value), function(node) { node[ns][id].duration = value; })); }; d3_transitionPrototype.each = function(type, listener) { - var id = this.id; + var id = this.id, ns = this.namespace; if (arguments.length < 2) { var inherit = d3_transitionInherit, inheritId = d3_transitionInheritId; - d3_transitionInheritId = id; - d3_selection_each(this, function(node, i, j) { - d3_transitionInherit = node.__transition__[id]; - type.call(node, node.__data__, i, j); - }); - d3_transitionInherit = inherit; - d3_transitionInheritId = inheritId; + try { + d3_transitionInheritId = id; + d3_selection_each(this, function(node, i, j) { + d3_transitionInherit = node[ns][id]; + type.call(node, node.__data__, i, j); + }); + } finally { + d3_transitionInherit = inherit; + d3_transitionInheritId = inheritId; + } } else { d3_selection_each(this, function(node) { - var transition = node.__transition__[id]; - (transition.event || (transition.event = d3.dispatch("start", "end"))).on(type, listener); + var transition = node[ns][id]; + (transition.event || (transition.event = d3.dispatch("start", "end", "interrupt"))).on(type, listener); }); } return this; @@ -5428,6 +5956,7 @@ d3_transitionPrototype.each = function(type, listener) { d3_transitionPrototype.transition = function() { var id0 = this.id, id1 = ++d3_transitionId, + ns = this.namespace, subgroups = [], subgroup, group, @@ -5438,19 +5967,22 @@ d3_transitionPrototype.transition = function() { subgroups.push(subgroup = []); for (var group = this[j], i = 0, n = group.length; i < n; i++) { if (node = group[i]) { - transition = Object.create(node.__transition__[id0]); - transition.delay += transition.duration; - d3_transitionNode(node, i, id1, transition); + transition = node[ns][id0]; + d3_transitionNode(node, i, ns, id1, {time: transition.time, ease: transition.ease, delay: transition.delay + transition.duration, duration: transition.duration}); } subgroup.push(node); } } - return d3_transition(subgroups, id1); + return d3_transition(subgroups, ns, id1); }; -function d3_transitionNode(node, i, id, inherit) { - var lock = node.__transition__ || (node.__transition__ = {active: 0, count: 0}), +function d3_transitionNamespace(name) { + return name == null ? "__transition__" : "__transition_" + name + "__"; +} + +function d3_transitionNode(node, i, ns, id, inherit) { + var lock = node[ns] || (node[ns] = {active: 0, count: 0}), transition = lock[id]; if (!transition) { @@ -5459,42 +5991,61 @@ function d3_transitionNode(node, i, id, inherit) { transition = lock[id] = { tween: new d3_Map, time: time, - ease: inherit.ease, delay: inherit.delay, - duration: inherit.duration + duration: inherit.duration, + ease: inherit.ease, + index: i }; + inherit = null; // allow gc + ++lock.count; d3.timer(function(elapsed) { - var d = node.__data__, - ease = transition.ease, - delay = transition.delay, - duration = transition.duration, + var delay = transition.delay, + duration, + ease, + timer = d3_timer_active, tweened = []; - if (delay <= elapsed) return start(elapsed); - d3_timer_replace(start, delay, time); + timer.t = delay + time; + if (delay <= elapsed) return start(elapsed - delay); + timer.c = start; function start(elapsed) { if (lock.active > id) return stop(); + + var active = lock[lock.active]; + if (active) { + --lock.count; + delete lock[lock.active]; + active.event && active.event.interrupt.call(node, node.__data__, active.index); + } + lock.active = id; - transition.event && transition.event.start.call(node, d, i); + + transition.event && transition.event.start.call(node, node.__data__, i); transition.tween.forEach(function(key, value) { - if (value = value.call(node, d, i)) { + if (value = value.call(node, node.__data__, i)) { tweened.push(value); } }); - if (tick(elapsed)) return 1; - d3_timer_replace(tick, 0, time); + // Deferred capture to allow tweens to initialize ease & duration. + ease = transition.ease; + duration = transition.duration; + + d3.timer(function() { // defer to end of current frame + timer.c = tick(elapsed || 1) ? d3_true : tick; + return 1; + }, 0, time); } function tick(elapsed) { - if (lock.active !== id) return stop(); + if (lock.active !== id) return 1; - var t = (elapsed - delay) / duration, + var t = elapsed / duration, e = ease(t), n = tweened.length; @@ -5503,15 +6054,14 @@ function d3_transitionNode(node, i, id, inherit) { } if (t >= 1) { - stop(); - transition.event && transition.event.end.call(node, d, i); - return 1; + transition.event && transition.event.end.call(node, node.__data__, i); + return stop(); } } function stop() { if (--lock.count) delete lock[id]; - else delete node.__transition__; + else delete node[ns]; return 1; } }, 0, time); @@ -5529,13 +6079,13 @@ function d3_xhrType(response) { function d3_xhr(url, mimeType, response, callback) { var xhr = {}, - dispatch = d3.dispatch("progress", "load", "error"), + dispatch = d3.dispatch("beforesend", "progress", "load", "error"), headers = {}, request = new XMLHttpRequest, responseType = null; // If IE does not support CORS, use XDomainRequest. - if (d3_window.XDomainRequest + if (this.XDomainRequest && !("withCredentials" in request) && /^(http(s)?:)?\/\//.test(url)) request = new XDomainRequest; @@ -5545,7 +6095,7 @@ function d3_xhr(url, mimeType, response, callback) { function respond() { var status = request.status, result; - if (!status && request.responseText || status >= 200 && status < 300 || status === 304) { + if (!status && d3_xhrHasResponse(request) || status >= 200 && status < 300 || status === 304) { try { result = response.call(xhr, request); } catch (e) { @@ -5611,6 +6161,7 @@ function d3_xhr(url, mimeType, response, callback) { if (mimeType != null && request.overrideMimeType) request.overrideMimeType(mimeType); if (responseType != null) request.responseType = responseType; if (callback != null) xhr.on("error", callback).on("load", function(request) { callback(null, request); }); + dispatch.beforesend.call(xhr, request); request.send(data == null ? null : data); return xhr; }; @@ -5631,6 +6182,13 @@ function d3_xhr_fixCallback(callback) { : callback; } +function d3_xhrHasResponse(request) { + var type = request.responseType; + return type && type !== "text" + ? request.response // null on error + : request.responseText; // "" on error +} + d3.text = d3_xhrType(function(request) { return request.responseText; }); @@ -5656,16 +6214,19 @@ function d3_html(request) { d3.xml = d3_xhrType(function(request) { return request.responseXML; }); - return d3; -})(); + if (typeof define === "function" && define.amd) define(d3); + else if (typeof module === "object" && module.exports) module.exports = d3; + this.d3 = d3; +}(); d3.combobox = function() { var event = d3.dispatch('accept'), data = [], - suggestions = []; + suggestions = [], + minItems = 2; var fetcher = function(val, cb) { cb(data.filter(function(d) { - return d.title + return d.value .toString() .toLowerCase() .indexOf(val.toLowerCase()) !== -1; @@ -5690,25 +6251,30 @@ d3.combobox = function() { var parent = this.parentNode, sibling = this.nextSibling; - var carat = d3.select(parent).selectAll('.combobox-carat') + var caret = d3.select(parent).selectAll('.combobox-caret') .filter(function(d) { return d === input.node(); }) .data([input.node()]); - carat.enter().insert('div', function() { return sibling; }) - .attr('class', 'combobox-carat'); + caret.enter().insert('div', function() { return sibling; }) + .attr('class', 'combobox-caret'); - carat + caret .on('mousedown', function () { // prevent the form element from blurring. it blurs // on mousedown d3.event.stopPropagation(); d3.event.preventDefault(); - input.node().focus(); + if (!shown) { + input.node().focus(); + fetch('', render); + } else { + hide(); + } }); }); function focus() { - fetch(render); + fetch(value(), render); } function blur() { @@ -5758,6 +6324,8 @@ d3.combobox = function() { input.on('input.typeahead', function() { idx = -1; render(); + var start = input.property('selectionStart'); + input.node().setSelectionRange(start, start); input.on('input.typeahead', change); }); break; @@ -5798,7 +6366,7 @@ d3.combobox = function() { } function change() { - fetch(function() { + fetch(value(), function() { autocomplete(); render(); }); @@ -5823,8 +6391,8 @@ d3.combobox = function() { return value; } - function fetch(cb) { - fetcher.call(input, value(), function(_) { + function fetch(v, cb) { + fetcher.call(input, v, function(_) { suggestions = _; cb(); }); @@ -5839,7 +6407,7 @@ d3.combobox = function() { for (var i = 0; i < suggestions.length; i++) { if (suggestions[i].value.toLowerCase().indexOf(v.toLowerCase()) === 0) { - var completion = v + suggestions[i].value.substr(v.length); + var completion = suggestions[i].value; idx = i; input.property('value', completion); input.node().setSelectionRange(v.length, completion.length); @@ -5849,7 +6417,7 @@ d3.combobox = function() { } function render() { - if (suggestions.length && document.activeElement === input.node()) { + if (suggestions.length >= minItems && document.activeElement === input.node()) { show(); } else { hide(); @@ -5915,9 +6483,35 @@ d3.combobox = function() { return combobox; }; + combobox.minItems = function(_) { + if (!arguments.length) return minItems; + minItems = _; + return combobox; + }; + return d3.rebind(combobox, event, 'on'); }; -d3.geo.tile = function() { + +d3.combobox.off = function(input) { + data = null; + fetcher = null; + + input + .on('focus.typeahead', null) + .on('blur.typeahead', null) + .on('keydown.typeahead', null) + .on('keyup.typeahead', null) + .on('input.typeahead', null) + .each(function() { + d3.select(this.parentNode).selectAll('.combobox-caret') + .filter(function(d) { return d === input.node(); }) + .on('mousedown', null); + }); + + d3.select(document.body) + .on('scroll.combobox', null); +}; +d3.geo.tile = function() { var size = [960, 500], scale = 256, scaleExtent = [0, 20], @@ -6147,14 +6741,20 @@ d3.keybinding = function(namespace) { // Up Arrow Key, or ↓ '↓': 40, down: 40, 'arrow-down': 40, // odities, printing characters that come out wrong: + // Firefox Equals + 'ffequals': 61, // Num-Multiply, or * '*': 106, star: 106, asterisk: 106, multiply: 106, // Num-Plus or + '+': 107, 'plus': 107, // Num-Subtract, or - '-': 109, subtract: 109, + // Firefox Minus + 'ffplus': 171, + // Firefox Minus + 'ffminus': 173, // Semicolon - ';': 186, semicolon:186, + ';': 186, semicolon: 186, // = or equals '=': 187, 'equals': 187, // Comma, or , @@ -6213,12 +6813,27 @@ d3.selection.prototype.one = function (type, listener, capture) { return this; }; d3.selection.prototype.dimensions = function (dimensions) { + var refresh = (function(node) { + var cr = node.getBoundingClientRect(); + prop = [cr.width, cr.height]; + this.property('__dimensions__', prop); + return prop; + }).bind(this); + + var node = this.node(); + if (!arguments.length) { - var node = this.node(); - return [node.offsetWidth, - node.offsetHeight]; + if (!node) return [0,0]; + return this.property('__dimensions__') || refresh(node); + } + if (dimensions === null) { + if (!node) return [0,0]; + return refresh(node); } - return this.attr({width: dimensions[0], height: dimensions[1]}); + + return this + .property('__dimensions__', [dimensions[0], dimensions[1]]) + .attr({width: dimensions[0], height: dimensions[1]}); }; d3.selection.prototype.trigger = function (type) { this.each(function() { @@ -6227,122 +6842,6 @@ d3.selection.prototype.trigger = function (type) { this.dispatchEvent(evt); }); }; -d3.typeahead = function() { - var event = d3.dispatch('accept'), - autohighlight = false, - data; - - var typeahead = function(selection) { - var container, - hidden, - idx = autohighlight ? 0 : -1; - - function setup() { - var rect = selection.node().getBoundingClientRect(); - container = d3.select(document.body) - .append('div').attr('class', 'typeahead') - .style({ - position: 'absolute', - left: rect.left + 'px', - top: rect.bottom + 'px' - }); - selection - .on('keyup.typeahead', key); - hidden = false; - } - - function hide() { - container.remove(); - idx = autohighlight ? 0 : -1; - hidden = true; - } - - function slowHide() { - if (autohighlight) { - if (container.select('a.selected').node()) { - select(container.select('a.selected').datum()); - event.accept(); - } - } - window.setTimeout(hide, 150); - } - - selection - .on('focus.typeahead', setup) - .on('blur.typeahead', slowHide); - - function key() { - var len = container.selectAll('a').data().length; - if (d3.event.keyCode === 40) { - idx = Math.min(idx + 1, len - 1); - return highlight(); - } else if (d3.event.keyCode === 38) { - idx = Math.max(idx - 1, 0); - return highlight(); - } else if (d3.event.keyCode === 13) { - if (container.select('a.selected').node()) { - select(container.select('a.selected').datum()); - } - event.accept(); - hide(); - } else { - update(); - } - } - - function highlight() { - container - .selectAll('a') - .classed('selected', function(d, i) { return i == idx; }); - } - - function update() { - if (hidden) setup(); - - data(selection, function(data) { - container.style('display', function() { - return data.length ? 'block' : 'none'; - }); - - var options = container - .selectAll('a') - .data(data, function(d) { return d.value; }); - - options.enter() - .append('a') - .text(function(d) { return d.value; }) - .attr('title', function(d) { return d.title; }) - .on('click', select); - - options.exit().remove(); - - options - .classed('selected', function(d, i) { return i == idx; }); - }); - } - - function select(d) { - selection - .property('value', d.value) - .trigger('change'); - } - - }; - - typeahead.data = function(_) { - if (!arguments.length) return data; - data = _; - return typeahead; - }; - - typeahead.autohighlight = function(_) { - if (!arguments.length) return autohighlight; - autohighlight = _; - return typeahead; - }; - - return d3.rebind(typeahead, event, 'on'); -}; // Tooltips and svg mask used to highlight certain features d3.curtain = function() { @@ -6500,6 +6999,437 @@ d3.selection.prototype.value = function(value) { if (!arguments.length) return this.property('value'); return this.each(d3_selection_value(value)); }; +// Copyright (c) 2006, 2008 Tony Garnock-Jones +// Copyright (c) 2006, 2008 LShift Ltd. +// +// Permission is hereby granted, free of charge, to any person +// obtaining a copy of this software and associated documentation files +// (the "Software"), to deal in the Software without restriction, +// including without limitation the rights to use, copy, modify, merge, +// publish, distribute, sublicense, and/or sell copies of the Software, +// and to permit persons to whom the Software is furnished to do so, +// subject to the following conditions: +// +// The above copyright notice and this permission notice shall be +// included in all copies or substantial portions of the Software. +// +// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, +// EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF +// MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND +// NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS +// BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN +// ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN +// CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE +// SOFTWARE. + +// source: https://bitbucket.org/lshift/synchrotron/src + +Diff3 = (function() { + 'use strict'; + + var diff3 = { + longest_common_subsequence: function(file1, file2) { + /* Text diff algorithm following Hunt and McIlroy 1976. + * J. W. Hunt and M. D. McIlroy, An algorithm for differential file + * comparison, Bell Telephone Laboratories CSTR #41 (1976) + * http://www.cs.dartmouth.edu/~doug/ + * + * Expects two arrays of strings. + */ + var equivalenceClasses; + var file2indices; + var newCandidate; + var candidates; + var line; + var c, i, j, jX, r, s; + + equivalenceClasses = {}; + for (j = 0; j < file2.length; j++) { + line = file2[j]; + if (equivalenceClasses[line]) { + equivalenceClasses[line].push(j); + } else { + equivalenceClasses[line] = [j]; + } + } + + candidates = [{file1index: -1, + file2index: -1, + chain: null}]; + + for (i = 0; i < file1.length; i++) { + line = file1[i]; + file2indices = equivalenceClasses[line] || []; + + r = 0; + c = candidates[0]; + + for (jX = 0; jX < file2indices.length; jX++) { + j = file2indices[jX]; + + for (s = 0; s < candidates.length; s++) { + if ((candidates[s].file2index < j) && + ((s == candidates.length - 1) || + (candidates[s + 1].file2index > j))) + break; + } + + if (s < candidates.length) { + newCandidate = {file1index: i, + file2index: j, + chain: candidates[s]}; + if (r == candidates.length) { + candidates.push(c); + } else { + candidates[r] = c; + } + r = s + 1; + c = newCandidate; + if (r == candidates.length) { + break; // no point in examining further (j)s + } + } + } + + candidates[r] = c; + } + + // At this point, we know the LCS: it's in the reverse of the + // linked-list through .chain of + // candidates[candidates.length - 1]. + + return candidates[candidates.length - 1]; + }, + + diff_comm: function(file1, file2) { + // We apply the LCS to build a "comm"-style picture of the + // differences between file1 and file2. + + var result = []; + var tail1 = file1.length; + var tail2 = file2.length; + var common = {common: []}; + + function processCommon() { + if (common.common.length) { + common.common.reverse(); + result.push(common); + common = {common: []}; + } + } + + for (var candidate = Diff3.longest_common_subsequence(file1, file2); + candidate !== null; + candidate = candidate.chain) + { + var different = {file1: [], file2: []}; + + while (--tail1 > candidate.file1index) { + different.file1.push(file1[tail1]); + } + + while (--tail2 > candidate.file2index) { + different.file2.push(file2[tail2]); + } + + if (different.file1.length || different.file2.length) { + processCommon(); + different.file1.reverse(); + different.file2.reverse(); + result.push(different); + } + + if (tail1 >= 0) { + common.common.push(file1[tail1]); + } + } + + processCommon(); + + result.reverse(); + return result; + }, + + diff_patch: function(file1, file2) { + // We apply the LCD to build a JSON representation of a + // diff(1)-style patch. + + var result = []; + var tail1 = file1.length; + var tail2 = file2.length; + + function chunkDescription(file, offset, length) { + var chunk = []; + for (var i = 0; i < length; i++) { + chunk.push(file[offset + i]); + } + return {offset: offset, + length: length, + chunk: chunk}; + } + + for (var candidate = Diff3.longest_common_subsequence(file1, file2); + candidate !== null; + candidate = candidate.chain) + { + var mismatchLength1 = tail1 - candidate.file1index - 1; + var mismatchLength2 = tail2 - candidate.file2index - 1; + tail1 = candidate.file1index; + tail2 = candidate.file2index; + + if (mismatchLength1 || mismatchLength2) { + result.push({file1: chunkDescription(file1, + candidate.file1index + 1, + mismatchLength1), + file2: chunkDescription(file2, + candidate.file2index + 1, + mismatchLength2)}); + } + } + + result.reverse(); + return result; + }, + + strip_patch: function(patch) { + // Takes the output of Diff3.diff_patch(), and removes + // information from it. It can still be used by patch(), + // below, but can no longer be inverted. + var newpatch = []; + for (var i = 0; i < patch.length; i++) { + var chunk = patch[i]; + newpatch.push({file1: {offset: chunk.file1.offset, + length: chunk.file1.length}, + file2: {chunk: chunk.file2.chunk}}); + } + return newpatch; + }, + + invert_patch: function(patch) { + // Takes the output of Diff3.diff_patch(), and inverts the + // sense of it, so that it can be applied to file2 to give + // file1 rather than the other way around. + + for (var i = 0; i < patch.length; i++) { + var chunk = patch[i]; + var tmp = chunk.file1; + chunk.file1 = chunk.file2; + chunk.file2 = tmp; + } + }, + + patch: function (file, patch) { + // Applies a patch to a file. + // + // Given file1 and file2, Diff3.patch(file1, + // Diff3.diff_patch(file1, file2)) should give file2. + + var result = []; + var commonOffset = 0; + + function copyCommon(targetOffset) { + while (commonOffset < targetOffset) { + result.push(file[commonOffset]); + commonOffset++; + } + } + + for (var chunkIndex = 0; chunkIndex < patch.length; chunkIndex++) { + var chunk = patch[chunkIndex]; + copyCommon(chunk.file1.offset); + for (var lineIndex = 0; lineIndex < chunk.file2.chunk.length; lineIndex++) { + result.push(chunk.file2.chunk[lineIndex]); + } + commonOffset += chunk.file1.length; + } + + copyCommon(file.length); + return result; + }, + + diff_indices: function(file1, file2) { + // We apply the LCS to give a simple representation of the + // offsets and lengths of mismatched chunks in the input + // files. This is used by diff3_merge_indices below. + + var result = []; + var tail1 = file1.length; + var tail2 = file2.length; + + for (var candidate = Diff3.longest_common_subsequence(file1, file2); + candidate !== null; + candidate = candidate.chain) + { + var mismatchLength1 = tail1 - candidate.file1index - 1; + var mismatchLength2 = tail2 - candidate.file2index - 1; + tail1 = candidate.file1index; + tail2 = candidate.file2index; + + if (mismatchLength1 || mismatchLength2) { + result.push({file1: [tail1 + 1, mismatchLength1], + file2: [tail2 + 1, mismatchLength2]}); + } + } + + result.reverse(); + return result; + }, + + diff3_merge_indices: function (a, o, b) { + // Given three files, A, O, and B, where both A and B are + // independently derived from O, returns a fairly complicated + // internal representation of merge decisions it's taken. The + // interested reader may wish to consult + // + // Sanjeev Khanna, Keshav Kunal, and Benjamin C. Pierce. "A + // Formal Investigation of Diff3." In Arvind and Prasad, + // editors, Foundations of Software Technology and Theoretical + // Computer Science (FSTTCS), December 2007. + // + // (http://www.cis.upenn.edu/~bcpierce/papers/diff3-short.pdf) + var i; + + var m1 = Diff3.diff_indices(o, a); + var m2 = Diff3.diff_indices(o, b); + + var hunks = []; + function addHunk(h, side) { + hunks.push([h.file1[0], side, h.file1[1], h.file2[0], h.file2[1]]); + } + for (i = 0; i < m1.length; i++) { addHunk(m1[i], 0); } + for (i = 0; i < m2.length; i++) { addHunk(m2[i], 2); } + hunks.sort(); + + var result = []; + var commonOffset = 0; + function copyCommon(targetOffset) { + if (targetOffset > commonOffset) { + result.push([1, commonOffset, targetOffset - commonOffset]); + commonOffset = targetOffset; + } + } + + for (var hunkIndex = 0; hunkIndex < hunks.length; hunkIndex++) { + var firstHunkIndex = hunkIndex; + var hunk = hunks[hunkIndex]; + var regionLhs = hunk[0]; + var regionRhs = regionLhs + hunk[2]; + while (hunkIndex < hunks.length - 1) { + var maybeOverlapping = hunks[hunkIndex + 1]; + var maybeLhs = maybeOverlapping[0]; + if (maybeLhs > regionRhs) break; + regionRhs = maybeLhs + maybeOverlapping[2]; + hunkIndex++; + } + + copyCommon(regionLhs); + if (firstHunkIndex == hunkIndex) { + // The "overlap" was only one hunk long, meaning that + // there's no conflict here. Either a and o were the + // same, or b and o were the same. + if (hunk[4] > 0) { + result.push([hunk[1], hunk[3], hunk[4]]); + } + } else { + // A proper conflict. Determine the extents of the + // regions involved from a, o and b. Effectively merge + // all the hunks on the left into one giant hunk, and + // do the same for the right; then, correct for skew + // in the regions of o that each side changed, and + // report appropriate spans for the three sides. + var regions = { + 0: [a.length, -1, o.length, -1], + 2: [b.length, -1, o.length, -1] + }; + for (i = firstHunkIndex; i <= hunkIndex; i++) { + hunk = hunks[i]; + var side = hunk[1]; + var r = regions[side]; + var oLhs = hunk[0]; + var oRhs = oLhs + hunk[2]; + var abLhs = hunk[3]; + var abRhs = abLhs + hunk[4]; + r[0] = Math.min(abLhs, r[0]); + r[1] = Math.max(abRhs, r[1]); + r[2] = Math.min(oLhs, r[2]); + r[3] = Math.max(oRhs, r[3]); + } + var aLhs = regions[0][0] + (regionLhs - regions[0][2]); + var aRhs = regions[0][1] + (regionRhs - regions[0][3]); + var bLhs = regions[2][0] + (regionLhs - regions[2][2]); + var bRhs = regions[2][1] + (regionRhs - regions[2][3]); + result.push([-1, + aLhs, aRhs - aLhs, + regionLhs, regionRhs - regionLhs, + bLhs, bRhs - bLhs]); + } + commonOffset = regionRhs; + } + + copyCommon(o.length); + return result; + }, + + diff3_merge: function (a, o, b, excludeFalseConflicts) { + // Applies the output of Diff3.diff3_merge_indices to actually + // construct the merged file; the returned result alternates + // between "ok" and "conflict" blocks. + + var result = []; + var files = [a, o, b]; + var indices = Diff3.diff3_merge_indices(a, o, b); + + var okLines = []; + function flushOk() { + if (okLines.length) { + result.push({ok: okLines}); + } + okLines = []; + } + function pushOk(xs) { + for (var j = 0; j < xs.length; j++) { + okLines.push(xs[j]); + } + } + + function isTrueConflict(rec) { + if (rec[2] != rec[6]) return true; + var aoff = rec[1]; + var boff = rec[5]; + for (var j = 0; j < rec[2]; j++) { + if (a[j + aoff] != b[j + boff]) return true; + } + return false; + } + + for (var i = 0; i < indices.length; i++) { + var x = indices[i]; + var side = x[0]; + if (side == -1) { + if (excludeFalseConflicts && !isTrueConflict(x)) { + pushOk(files[0].slice(x[1], x[1] + x[2])); + } else { + flushOk(); + result.push({conflict: {a: a.slice(x[1], x[1] + x[2]), + aIndex: x[1], + o: o.slice(x[3], x[3] + x[4]), + oIndex: x[3], + b: b.slice(x[5], x[5] + x[6]), + bIndex: x[5]}}); + } + } else { + pushOk(files[side].slice(x[1], x[1] + x[2])); + } + } + + flushOk(); + return result; + } + }; + return diff3; +})(); + +if (typeof module !== 'undefined') module.exports = Diff3; var JXON = new (function () { var sValueProp = "keyValue", sAttributesProp = "keyAttributes", sAttrPref = "@", /* you can customize these values */ @@ -6641,1044 +7571,1173 @@ var JXON = new (function () { // var newDoc = JXON.unbuild(myObject); // we got our Document instance! try: alert((new XMLSerializer()).serializeToString(newDoc)); -/*! - * Lo-Dash 1.0.0-rc.3 - * (c) 2012 John-David Dalton - * Based on Underscore.js 1.4.3 - * (c) 2009-2012 Jeremy Ashkenas, DocumentCloud Inc. - * Available under MIT license +/** + * @license + * lodash 3.9.3 (Custom Build) + * Build: `lodash --development --output js/lib/lodash.js include="any,assign,bind,chunk,clone,compact,contains,debounce,difference,each,every,extend,filter,find,first,forEach,forOwn,groupBy,indexOf,intersection,isEmpty,isEqual,isFunction,keys,last,map,omit,pairs,pluck,reject,some,throttle,union,uniq,unique,values,without,flatten,value,chain,cloneDeep,merge,pick,reduce" exports="global,node"` + * Copyright 2012-2015 The Dojo Foundation + * Based on Underscore.js 1.8.3 + * Copyright 2009-2015 Jeremy Ashkenas, DocumentCloud and Investigative Reporters & Editors + * Available under MIT license */ -;(function(window, undefined) { - - /** Detect free variable `exports` */ - var freeExports = typeof exports == 'object' && exports; - - /** Detect free variable `global` and use it as `window` */ - var freeGlobal = typeof global == 'object' && global; - if (freeGlobal.global === freeGlobal) { - window = freeGlobal; - } - - /** Used for array and object method references */ - var arrayRef = [], - // avoid a Closure Compiler bug by creatively creating an object - objectRef = new function(){}; - - /** Used to generate unique IDs */ - var idCounter = 0; - - /** Used internally to indicate various things */ - var indicatorObject = objectRef; - - /** Used by `cachedContains` as the default size when optimizations are enabled for large arrays */ - var largeArraySize = 30; - - /** Used to restore the original `_` reference in `noConflict` */ - var oldDash = window._; - - /** Used to detect template delimiter values that require a with-statement */ - var reComplexDelimiter = /[-?+=!~*%&^<>|{(\/]|\[\D|\b(?:delete|in|instanceof|new|typeof|void)\b/; - - /** Used to match HTML entities */ - var reEscapedHtml = /&(?:amp|lt|gt|quot|#x27);/g; - - /** 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; - - /** Used to match regexp flags from their coerced string values */ - var reFlags = /\w*$/; - - /** Used to insert the data object variable into compiled template source */ - var reInsertVariable = /(?:__e|__t = )\(\s*(?![\d\s"']|this\.)/g; +;(function() { - /** Used to detect if a method is native */ - var reNative = RegExp('^' + - (objectRef.valueOf + '') - .replace(/[.*+?^=!:${}()|[\]\/\\]/g, '\\$&') - .replace(/valueOf|for [^\]]+/g, '.+?') + '$' - ); + /** Used as a safe reference for `undefined` in pre-ES5 environments. */ + var undefined; + + /** Used as the semantic version number. */ + var VERSION = '3.9.3'; + + /** Used to compose bitmasks for wrapper metadata. */ + var BIND_FLAG = 1, + BIND_KEY_FLAG = 2, + CURRY_BOUND_FLAG = 4, + CURRY_FLAG = 8, + CURRY_RIGHT_FLAG = 16, + PARTIAL_FLAG = 32, + PARTIAL_RIGHT_FLAG = 64, + ARY_FLAG = 128, + REARG_FLAG = 256; + + /** Used to detect when a function becomes hot. */ + var HOT_COUNT = 150, + HOT_SPAN = 16; + + /** Used to indicate the type of lazy iteratees. */ + var LAZY_DROP_WHILE_FLAG = 0, + LAZY_FILTER_FLAG = 1, + LAZY_MAP_FLAG = 2; + + /** Used as the `TypeError` message for "Functions" methods. */ + var FUNC_ERROR_TEXT = 'Expected a function'; + + /** Used as the internal argument placeholder. */ + var PLACEHOLDER = '__lodash_placeholder__'; + + /** `Object#toString` result references. */ + var argsTag = '[object Arguments]', + arrayTag = '[object Array]', + boolTag = '[object Boolean]', + dateTag = '[object Date]', + errorTag = '[object Error]', + funcTag = '[object Function]', + mapTag = '[object Map]', + numberTag = '[object Number]', + objectTag = '[object Object]', + regexpTag = '[object RegExp]', + setTag = '[object Set]', + stringTag = '[object String]', + weakMapTag = '[object WeakMap]'; + + var arrayBufferTag = '[object ArrayBuffer]', + 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]'; + + /** Used to match property names within property paths. */ + var reIsDeepProp = /\.|\[(?:[^[\]]*|(["'])(?:(?!\1)[^\n\\]|\\.)*?\1)\]/, + reIsPlainProp = /^\w*$/, + rePropName = /[^.[\]]+|\[(?:(-?\d+(?:\.\d+)?)|(["'])((?:(?!\2)[^\n\\]|\\.)*?)\2)\]/g; /** - * Used to match ES6 template delimiters - * http://people.mozilla.org/~jorendorff/es6-draft.html#sec-7.8.6 + * Used to match `RegExp` [special characters](http://www.regular-expressions.info/characters.html#special). + * In addition to special characters the forward slash is escaped to allow for + * easier `eval` use and `Function` compilation. */ - var reEsTemplate = /\$\{((?:(?=\\?)\\?[\s\S])*?)}/g; + var reRegExpChars = /[.*+?^${}()|[\]\/\\]/g, + reHasRegExpChars = RegExp(reRegExpChars.source); - /** Used to match "interpolate" template delimiters */ - var reInterpolate = /<%=([\s\S]+?)%>/g; + /** Used to match backslashes in property paths. */ + var reEscapeChar = /\\(\\)?/g; - /** Used to ensure capturing order of template delimiters */ - var reNoMatch = /($^)/; + /** Used to match `RegExp` flags from their coerced string values. */ + var reFlags = /\w*$/; - /** Used to match HTML characters */ - var reUnescapedHtml = /[&<>"']/g; + /** Used to detect host constructors (Safari > 5). */ + var reIsHostCtor = /^\[object .+?Constructor\]$/; - /** Used to match unescaped characters in compiled string literals */ - var reUnescapedString = /['\n\r\t\u2028\u2029\\]/g; + /** Used to detect unsigned integer values. */ + var reIsUint = /^\d+$/; - /** Used to fix the JScript [[DontEnum]] bug */ - var shadowed = [ + /** Used to fix the JScript `[[DontEnum]]` bug. */ + var shadowProps = [ 'constructor', 'hasOwnProperty', 'isPrototypeOf', 'propertyIsEnumerable', 'toLocaleString', 'toString', 'valueOf' ]; - /** Used to make template sourceURLs easier to identify */ - var templateCounter = 0; + /** 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[dateTag] = typedArrayTags[errorTag] = + typedArrayTags[funcTag] = typedArrayTags[mapTag] = + typedArrayTags[numberTag] = typedArrayTags[objectTag] = + typedArrayTags[regexpTag] = typedArrayTags[setTag] = + typedArrayTags[stringTag] = typedArrayTags[weakMapTag] = false; + + /** Used to identify `toStringTag` values supported by `_.clone`. */ + var cloneableTags = {}; + cloneableTags[argsTag] = cloneableTags[arrayTag] = + cloneableTags[arrayBufferTag] = cloneableTags[boolTag] = + cloneableTags[dateTag] = cloneableTags[float32Tag] = + cloneableTags[float64Tag] = cloneableTags[int8Tag] = + cloneableTags[int16Tag] = cloneableTags[int32Tag] = + cloneableTags[numberTag] = cloneableTags[objectTag] = + cloneableTags[regexpTag] = cloneableTags[stringTag] = + cloneableTags[uint8Tag] = cloneableTags[uint8ClampedTag] = + cloneableTags[uint16Tag] = cloneableTags[uint32Tag] = true; + cloneableTags[errorTag] = cloneableTags[funcTag] = + cloneableTags[mapTag] = cloneableTags[setTag] = + cloneableTags[weakMapTag] = false; + + /** Used as an internal `_.debounce` options object by `_.throttle`. */ + var debounceOptions = { + 'leading': false, + 'maxWait': 0, + 'trailing': false + }; - /** Native method shortcuts */ - var ceil = Math.ceil, - concat = arrayRef.concat, - floor = Math.floor, - getPrototypeOf = reNative.test(getPrototypeOf = Object.getPrototypeOf) && getPrototypeOf, - hasOwnProperty = objectRef.hasOwnProperty, - push = arrayRef.push, - propertyIsEnumerable = objectRef.propertyIsEnumerable, - toString = objectRef.toString; - - /* Native method shortcuts for methods with the same name as other `lodash` methods */ - var nativeBind = reNative.test(nativeBind = slice.bind) && nativeBind, - nativeIsArray = reNative.test(nativeIsArray = Array.isArray) && nativeIsArray, - nativeIsFinite = window.isFinite, - nativeIsNaN = window.isNaN, - nativeKeys = reNative.test(nativeKeys = Object.keys) && nativeKeys, - nativeMax = Math.max, - nativeMin = Math.min, - nativeRandom = Math.random; + /** Used to determine if values are of the language type `Object`. */ + var objectTypes = { + 'function': true, + 'object': true + }; + + /** Detect free variable `exports`. */ + var freeExports = objectTypes[typeof exports] && exports && !exports.nodeType && exports; + + /** Detect free variable `module`. */ + var freeModule = objectTypes[typeof module] && module && !module.nodeType && module; - /** `Object#toString` result shortcuts */ - var argsClass = '[object Arguments]', - arrayClass = '[object Array]', - boolClass = '[object Boolean]', - dateClass = '[object Date]', - funcClass = '[object Function]', - numberClass = '[object Number]', - objectClass = '[object Object]', - regexpClass = '[object RegExp]', - stringClass = '[object String]'; + /** Detect free variable `global` from Node.js. */ + var freeGlobal = freeExports && freeModule && typeof global == 'object' && global && global.Object && global; - /** Detect various environments */ - var isIeOpera = !!window.attachEvent, - isV8 = nativeBind && !/\n|true/.test(nativeBind + isIeOpera); + /** Detect free variable `self`. */ + var freeSelf = objectTypes[typeof self] && self && self.Object && self; - /* Detect if `Function#bind` exists and is inferred to be fast (all but V8) */ - var isBindFast = nativeBind && !isV8; + /** Detect free variable `window`. */ + var freeWindow = objectTypes[typeof window] && window && window.Object && window; - /* Detect if `Object.keys` exists and is inferred to be fast (IE, Opera, V8) */ - var isKeysFast = nativeKeys && (isIeOpera || isV8); + /** Detect the popular CommonJS extension `module.exports`. */ + var moduleExports = freeModule && freeModule.exports === freeExports && freeExports; /** - * Detect the JScript [[DontEnum]] bug: + * Used as a reference to the global object. * - * In IE < 9 an objects own properties, shadowing non-enumerable ones, are - * made non-enumerable as well. + * The `this` value is used if it's the global object to avoid Greasemonkey's + * restricted `window` object, otherwise the `window` object is used. */ - var hasDontEnumBug; + var root = freeGlobal || ((freeWindow !== (this && this.window)) && freeWindow) || freeSelf || this; - /** Detect if own properties are iterated after inherited properties (IE < 9) */ - var iteratesOwnLast; + /*--------------------------------------------------------------------------*/ /** - * Detect if `Array#shift` and `Array#splice` augment array-like objects - * incorrectly: + * The base implementation of `_.findIndex` and `_.findLastIndex` without + * support for callback shorthands and `this` binding. * - * Firefox < 10, IE compatibility mode, and IE < 9 have buggy Array `shift()` - * and `splice()` functions that fail to remove the last element, `value[0]`, - * of array-like objects even though the `length` property is set to `0`. - * The `shift()` method is buggy in IE 8 compatibility mode, while `splice()` - * is buggy regardless of mode in IE < 9 and buggy in compatibility mode in IE 9. + * @private + * @param {Array} array The array to search. + * @param {Function} predicate The function invoked per iteration. + * @param {boolean} [fromRight] Specify iterating from right to left. + * @returns {number} Returns the index of the matched value, else `-1`. */ - var hasObjectSpliceBug = (hasObjectSpliceBug = { '0': 1, 'length': 1 }, - arrayRef.splice.call(hasObjectSpliceBug, 0, 1), hasObjectSpliceBug[0]); - - /** Detect if an `arguments` object's indexes are non-enumerable (IE < 9) */ - var nonEnumArgs = true; - - (function() { - var props = []; - function ctor() { this.x = 1; } - ctor.prototype = { 'valueOf': 1, 'y': 1 }; - for (var prop in new ctor) { props.push(prop); } - for (prop in arguments) { nonEnumArgs = !prop; } - - hasDontEnumBug = !/valueOf/.test(props); - iteratesOwnLast = props[0] != 'x'; - }(1)); - - /** Detect if `arguments` objects are `Object` objects (all but Opera < 10.5) */ - var argsAreObjects = arguments.constructor == Object; + function baseFindIndex(array, predicate, fromRight) { + var length = array.length, + index = fromRight ? length : -1; - /** Detect if `arguments` objects [[Class]] is unresolvable (Firefox < 4, IE < 9) */ - var noArgsClass = !isArguments(arguments); + while ((fromRight ? index-- : ++index < length)) { + if (predicate(array[index], index, array)) { + return index; + } + } + return -1; + } /** - * Detect lack of support for accessing string characters by index: + * The base implementation of `_.indexOf` without support for binary searches. * - * IE < 8 can't access characters by index and IE 8 can only access - * characters by index on string literals. + * @private + * @param {Array} array The array to search. + * @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`. */ - var noCharByIndex = ('x'[0] + Object('x')[0]) != 'xx'; + function baseIndexOf(array, value, fromIndex) { + if (value !== value) { + return indexOfNaN(array, fromIndex); + } + var index = fromIndex - 1, + length = array.length; + + while (++index < length) { + if (array[index] === value) { + return index; + } + } + return -1; + } /** - * Detect if a node's [[Class]] is unresolvable (IE < 9) - * and that the JS engine won't error when attempting to coerce an object to - * a string without a `toString` property value of `typeof` "function". + * The base implementation of `_.isFunction` without support for environments + * with incorrect `typeof` results. + * + * @private + * @param {*} value The value to check. + * @returns {boolean} Returns `true` if `value` is correctly classified, else `false`. */ - try { - var noNodeClass = ({ 'toString': 0 } + '', toString.call(document) == objectClass); - } catch(e) { } + function baseIsFunction(value) { + // Avoid a Chakra JIT bug in compatibility modes of IE 11. + // See https://github.com/jashkenas/underscore/issues/1621 for more details. + return typeof value == 'function' || false; + } /** - * Detect if sourceURL syntax is usable without erroring: + * Converts `value` to a string if it's not one. An empty string is returned + * for `null` or `undefined` values. * - * The JS engine embedded in Adobe products will throw a syntax error when - * it encounters a single line comment beginning with the `@` symbol. - * - * The JS engine in Narwhal will generate the function `function anonymous(){//}` - * and throw a syntax error. - * - * Avoid comments beginning `@` symbols in IE because they are part of its - * non-standard conditional compilation support. - * http://msdn.microsoft.com/en-us/library/121hztk3(v=vs.94).aspx + * @private + * @param {*} value The value to process. + * @returns {string} Returns the string. */ - try { - var useSourceURL = (Function('//@')(), !isIeOpera); - } catch(e) { } - - /** Used to identify object classifications that `_.clone` supports */ - var cloneableClasses = {}; - cloneableClasses[funcClass] = false; - cloneableClasses[argsClass] = cloneableClasses[arrayClass] = - cloneableClasses[boolClass] = cloneableClasses[dateClass] = - cloneableClasses[numberClass] = cloneableClasses[objectClass] = - cloneableClasses[regexpClass] = cloneableClasses[stringClass] = true; - - /** Used to lookup a built-in constructor by [[Class]] */ - var ctorByClass = {}; - ctorByClass[arrayClass] = Array; - ctorByClass[boolClass] = Boolean; - ctorByClass[dateClass] = Date; - ctorByClass[objectClass] = Object; - ctorByClass[numberClass] = Number; - ctorByClass[regexpClass] = RegExp; - ctorByClass[stringClass] = String; - - /** Used to determine if values are of the language type Object */ - var objectTypes = { - 'boolean': false, - 'function': true, - 'object': true, - 'number': false, - 'string': false, - 'undefined': false - }; - - /** Used to escape characters for inclusion in compiled string literals */ - var stringEscapes = { - '\\': '\\', - "'": "'", - '\n': 'n', - '\r': 'r', - '\t': 't', - '\u2028': 'u2028', - '\u2029': 'u2029' - }; - - /*--------------------------------------------------------------------------*/ + function baseToString(value) { + if (typeof value == 'string') { + return value; + } + return value == null ? '' : (value + ''); + } /** - * Creates a `lodash` object, that wraps the given `value`, to enable - * method chaining. - * - * The chainable wrapper functions are: - * `after`, `assign`, `bind`, `bindAll`, `bindKey`, `chain`, `compact`, `compose`, - * `concat`, `countBy`, `debounce`, `defaults`, `defer`, `delay`, `difference`, - * `filter`, `flatten`, `forEach`, `forIn`, `forOwn`, `functions`, `groupBy`, - * `initial`, `intersection`, `invert`, `invoke`, `keys`, `map`, `max`, `memoize`, - * `merge`, `min`, `object`, `omit`, `once`, `pairs`, `partial`, `pick`, `pluck`, - * `push`, `range`, `reject`, `rest`, `reverse`, `shuffle`, `slice`, `sort`, - * `sortBy`, `splice`, `tap`, `throttle`, `times`, `toArray`, `union`, `uniq`, - * `unshift`, `values`, `where`, `without`, `wrap`, and `zip` - * - * The non-chainable wrapper functions are: - * `clone`, `cloneDeep`, `contains`, `escape`, `every`, `find`, `has`, `identity`, - * `indexOf`, `isArguments`, `isArray`, `isBoolean`, `isDate`, `isElement`, `isEmpty`, - * `isEqual`, `isFinite`, `isFunction`, `isNaN`, `isNull`, `isNumber`, `isObject`, - * `isPlainObject`, `isRegExp`, `isString`, `isUndefined`, `join`, `lastIndexOf`, - * `mixin`, `noConflict`, `pop`, `random`, `reduce`, `reduceRight`, `result`, - * `shift`, `size`, `some`, `sortedIndex`, `template`, `unescape`, and `uniqueId` + * Gets the index at which the first occurrence of `NaN` is found in `array`. * - * The wrapper functions `first` and `last` return wrapped values when `n` is - * passed, otherwise they return unwrapped values. + * @private + * @param {Array} array The array to search. + * @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 `NaN`, else `-1`. + */ + function indexOfNaN(array, fromIndex, fromRight) { + var length = array.length, + index = fromIndex + (fromRight ? 0 : -1); + + while ((fromRight ? index-- : ++index < length)) { + var other = array[index]; + if (other !== other) { + return index; + } + } + return -1; + } + + /** + * Checks if `value` is a host object in IE < 9. + * + * @private + * @param {*} value The value to check. + * @returns {boolean} Returns `true` if `value` is a host object, else `false`. + */ + var isHostObject = (function() { + try { + Object({ 'toString': 0 } + ''); + } catch(e) { + return function() { return false; }; + } + return function(value) { + // IE < 9 presents many host objects as `Object` objects that can coerce + // to strings despite having improperly defined `toString` methods. + return typeof value.toString != 'function' && typeof (value + '') == 'string'; + }; + }()); + + /** + * Checks if `value` is object-like. + * + * @private + * @param {*} value The value to check. + * @returns {boolean} Returns `true` if `value` is object-like, else `false`. + */ + function isObjectLike(value) { + return !!value && typeof value == 'object'; + } + + /** + * 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 = -1, + result = []; + + while (++index < length) { + if (array[index] === placeholder) { + array[index] = PLACEHOLDER; + result[++resIndex] = index; + } + } + return result; + } + + /** + * An implementation of `_.uniq` optimized for sorted arrays without support + * for callback shorthands and `this` binding. + * + * @private + * @param {Array} array The array to inspect. + * @param {Function} [iteratee] The function invoked per iteration. + * @returns {Array} Returns the new duplicate-value-free array. + */ + function sortedUniq(array, iteratee) { + var seen, + index = -1, + length = array.length, + resIndex = -1, + result = []; + + while (++index < length) { + var value = array[index], + computed = iteratee ? iteratee(value, index, array) : value; + + if (!index || seen !== computed) { + seen = computed; + result[++resIndex] = value; + } + } + return result; + } + + /*--------------------------------------------------------------------------*/ + + /** Used for native method references. */ + var arrayProto = Array.prototype, + errorProto = Error.prototype, + objectProto = Object.prototype, + stringProto = String.prototype; + + /** Used to resolve the decompiled source of functions. */ + var fnToString = Function.prototype.toString; + + /** Used to check objects for own properties. */ + var hasOwnProperty = objectProto.hasOwnProperty; + + /** + * Used to resolve the [`toStringTag`](https://people.mozilla.org/~jorendorff/es6-draft.html#sec-object.prototype.tostring) + * of values. + */ + var objToString = objectProto.toString; + + /** Used to detect if a method is native. */ + var reIsNative = RegExp('^' + + escapeRegExp(fnToString.call(hasOwnProperty)) + .replace(/hasOwnProperty|(function).*?(?=\\\()| for .+?(?=\\\])/g, '$1.*?') + '$' + ); + + /** Native method references. */ + var ArrayBuffer = getNative(root, 'ArrayBuffer'), + bufferSlice = getNative(ArrayBuffer && new ArrayBuffer(0), 'slice'), + ceil = Math.ceil, + floor = Math.floor, + getPrototypeOf = getNative(Object, 'getPrototypeOf'), + push = arrayProto.push, + propertyIsEnumerable = objectProto.propertyIsEnumerable, + Set = getNative(root, 'Set'), + splice = arrayProto.splice, + Uint8Array = getNative(root, 'Uint8Array'), + WeakMap = getNative(root, 'WeakMap'); + + /** Used to clone array buffers. */ + var Float64Array = (function() { + // Safari 5 errors when using an array buffer to initialize a typed array + // where the array buffer's `byteLength` is not a multiple of the typed + // array's `BYTES_PER_ELEMENT`. + try { + var func = getNative(root, 'Float64Array'), + result = new func(new ArrayBuffer(10), 0, 1) && func; + } catch(e) {} + return result || null; + }()); + + /* Native method references for those with the same name as other `lodash` methods. */ + var nativeCreate = getNative(Object, 'create'), + nativeIsArray = getNative(Array, 'isArray'), + nativeKeys = getNative(Object, 'keys'), + nativeMax = Math.max, + nativeMin = Math.min, + nativeNow = getNative(Date, 'now'); + + /** Used as references for `-Infinity` and `Infinity`. */ + var POSITIVE_INFINITY = Number.POSITIVE_INFINITY; + + /** 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; + + /** Used as the size, in bytes, of each `Float64Array` element. */ + var FLOAT64_BYTES_PER_ELEMENT = Float64Array ? Float64Array.BYTES_PER_ELEMENT : 0; + + /** + * Used as the [maximum length](https://people.mozilla.org/~jorendorff/es6-draft.html#sec-number.max_safe_integer) + * of an array-like value. + */ + var MAX_SAFE_INTEGER = 9007199254740991; + + /** Used to store function metadata. */ + var metaMap = WeakMap && new WeakMap; + + /** Used to lookup unminified function names. */ + var realNames = {}; + + /** Used to lookup a type array constructors by `toStringTag`. */ + var ctorByTag = {}; + ctorByTag[float32Tag] = root.Float32Array; + ctorByTag[float64Tag] = root.Float64Array; + ctorByTag[int8Tag] = root.Int8Array; + ctorByTag[int16Tag] = root.Int16Array; + ctorByTag[int32Tag] = root.Int32Array; + ctorByTag[uint8Tag] = root.Uint8Array; + ctorByTag[uint8ClampedTag] = root.Uint8ClampedArray; + ctorByTag[uint16Tag] = root.Uint16Array; + ctorByTag[uint32Tag] = root.Uint32Array; + + /** Used to avoid iterating over non-enumerable properties in IE < 9. */ + var nonEnumProps = {}; + nonEnumProps[arrayTag] = nonEnumProps[dateTag] = nonEnumProps[numberTag] = { 'constructor': true, 'toLocaleString': true, 'toString': true, 'valueOf': true }; + nonEnumProps[boolTag] = nonEnumProps[stringTag] = { 'constructor': true, 'toString': true, 'valueOf': true }; + nonEnumProps[errorTag] = nonEnumProps[funcTag] = nonEnumProps[regexpTag] = { 'constructor': true, 'toString': true }; + nonEnumProps[objectTag] = { 'constructor': true }; + + arrayEach(shadowProps, function(key) { + for (var tag in nonEnumProps) { + if (hasOwnProperty.call(nonEnumProps, tag)) { + var props = nonEnumProps[tag]; + props[key] = hasOwnProperty.call(props, key); + } + } + }); + + /*------------------------------------------------------------------------*/ + + /** + * Creates a `lodash` object which wraps `value` to enable implicit chaining. + * Methods that operate on and return arrays, collections, and functions can + * be chained together. Methods that return a boolean or single value will + * automatically end the chain returning the unwrapped value. Explicit chaining + * may be enabled using `_.chain`. The execution of chained methods is lazy, + * that is, execution is deferred until `_#value` is implicitly or explicitly + * called. + * + * Lazy evaluation allows several methods to support shortcut fusion. Shortcut + * fusion is an optimization that merges iteratees to avoid creating intermediate + * arrays and reduce the number of iteratee executions. + * + * 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`, `reverse`, `shift`, `slice`, `sort`, + * `splice`, and `unshift` + * + * The wrapper `String` methods are: + * `replace` and `split` + * + * The wrapper methods that support shortcut fusion are: + * `compact`, `drop`, `dropRight`, `dropRightWhile`, `dropWhile`, `filter`, + * `first`, `initial`, `last`, `map`, `pluck`, `reject`, `rest`, `reverse`, + * `slice`, `take`, `takeRight`, `takeRightWhile`, `takeWhile`, `toArray`, + * and `where` + * + * The chainable wrapper methods are: + * `after`, `ary`, `assign`, `at`, `before`, `bind`, `bindAll`, `bindKey`, + * `callback`, `chain`, `chunk`, `commit`, `compact`, `concat`, `constant`, + * `countBy`, `create`, `curry`, `debounce`, `defaults`, `defer`, `delay`, + * `difference`, `drop`, `dropRight`, `dropRightWhile`, `dropWhile`, `fill`, + * `filter`, `flatten`, `flattenDeep`, `flow`, `flowRight`, `forEach`, + * `forEachRight`, `forIn`, `forInRight`, `forOwn`, `forOwnRight`, `functions`, + * `groupBy`, `indexBy`, `initial`, `intersection`, `invert`, `invoke`, `keys`, + * `keysIn`, `map`, `mapKeys`, `mapValues`, `matches`, `matchesProperty`, + * `memoize`, `merge`, `method`, `methodOf`, `mixin`, `negate`, `omit`, `once`, + * `pairs`, `partial`, `partialRight`, `partition`, `pick`, `plant`, `pluck`, + * `property`, `propertyOf`, `pull`, `pullAt`, `push`, `range`, `rearg`, + * `reject`, `remove`, `rest`, `restParam`, `reverse`, `set`, `shuffle`, + * `slice`, `sort`, `sortBy`, `sortByAll`, `sortByOrder`, `splice`, `spread`, + * `take`, `takeRight`, `takeRightWhile`, `takeWhile`, `tap`, `throttle`, + * `thru`, `times`, `toArray`, `toPlainObject`, `transform`, `union`, `uniq`, + * `unshift`, `unzip`, `unzipWith`, `values`, `valuesIn`, `where`, `without`, + * `wrap`, `xor`, `zip`, `zipObject`, `zipWith` + * + * The wrapper methods that are **not** chainable by default are: + * `add`, `attempt`, `camelCase`, `capitalize`, `clone`, `cloneDeep`, `deburr`, + * `endsWith`, `escape`, `escapeRegExp`, `every`, `find`, `findIndex`, `findKey`, + * `findLast`, `findLastIndex`, `findLastKey`, `findWhere`, `first`, `get`, + * `gt`, `gte`, `has`, `identity`, `includes`, `indexOf`, `inRange`, `isArguments`, + * `isArray`, `isBoolean`, `isDate`, `isElement`, `isEmpty`, `isEqual`, `isError`, + * `isFinite` `isFunction`, `isMatch`, `isNative`, `isNaN`, `isNull`, `isNumber`, + * `isObject`, `isPlainObject`, `isRegExp`, `isString`, `isUndefined`, + * `isTypedArray`, `join`, `kebabCase`, `last`, `lastIndexOf`, `lt`, `lte`, + * `max`, `min`, `noConflict`, `noop`, `now`, `pad`, `padLeft`, `padRight`, + * `parseInt`, `pop`, `random`, `reduce`, `reduceRight`, `repeat`, `result`, + * `runInContext`, `shift`, `size`, `snakeCase`, `some`, `sortedIndex`, + * `sortedLastIndex`, `startCase`, `startsWith`, `sum`, `template`, `trim`, + * `trimLeft`, `trimRight`, `trunc`, `unescape`, `uniqueId`, `value`, and `words` + * + * The wrapper method `sample` will return a wrapped value when `n` is provided, + * otherwise an unwrapped value is returned. * * @name _ * @constructor - * @category Chaining - * @param {Mixed} value The value to wrap in a `lodash` instance. - * @returns {Object} Returns a `lodash` instance. + * @category Chain + * @param {*} value The value to wrap in a `lodash` instance. + * @returns {Object} Returns the new `lodash` wrapper instance. + * @example + * + * var wrapped = _([1, 2, 3]); + * + * // returns an unwrapped value + * wrapped.reduce(function(total, n) { + * return total + n; + * }); + * // => 6 + * + * // returns a wrapped value + * var squares = wrapped.map(function(n) { + * return n * n; + * }); + * + * _.isArray(squares); + * // => false + * + * _.isArray(squares.value()); + * // => true */ function lodash(value) { - // exit early if already wrapped, even if wrapped by a different `lodash` constructor - if (value && typeof value == 'object' && value.__wrapped__) { - return value; - } - // allow invoking `lodash` without the `new` operator - if (!(this instanceof lodash)) { - return new lodash(value); + if (isObjectLike(value) && !isArray(value) && !(value instanceof LazyWrapper)) { + if (value instanceof LodashWrapper) { + return value; + } + if (hasOwnProperty.call(value, '__chain__') && hasOwnProperty.call(value, '__wrapped__')) { + return wrapperClone(value); + } } + return new LodashWrapper(value); + } + + /** + * The function whose prototype all chaining wrappers inherit from. + * + * @private + */ + function baseLodash() { + // No operation performed. + } + + /** + * The base constructor for creating `lodash` wrapper objects. + * + * @private + * @param {*} value The value to wrap. + * @param {boolean} [chainAll] Enable chaining for all wrapper methods. + * @param {Array} [actions=[]] Actions to peform to resolve the unwrapped value. + */ + function LodashWrapper(value, chainAll, actions) { this.__wrapped__ = value; + this.__actions__ = actions || []; + this.__chain__ = !!chainAll; } /** - * By default, the template delimiters used by Lo-Dash are similar to those in - * embedded Ruby (ERB). Change the following template settings to use alternative - * delimiters. + * An object environment feature flags. * * @static * @memberOf _ * @type Object */ - lodash.templateSettings = { + var support = lodash.support = {}; + + (function(x) { + var Ctor = function() { this.x = x; }, + object = { '0': x, 'length': x }, + props = []; + + Ctor.prototype = { 'valueOf': x, 'y': x }; + for (var key in new Ctor) { props.push(key); } /** - * Used to detect `data` property values to be HTML-escaped. + * Detect if the `toStringTag` of `arguments` objects is resolvable + * (all but Firefox < 4, IE < 9). * - * @static - * @memberOf _.templateSettings - * @type RegExp + * @memberOf _.support + * @type boolean */ - 'escape': /<%-([\s\S]+?)%>/g, + support.argsTag = objToString.call(arguments) == argsTag; /** - * Used to detect code to be evaluated. + * Detect if `name` or `message` properties of `Error.prototype` are + * enumerable by default (IE < 9, Safari < 5.1). * - * @static - * @memberOf _.templateSettings - * @type RegExp + * @memberOf _.support + * @type boolean */ - 'evaluate': /<%([\s\S]+?)%>/g, + support.enumErrorProps = propertyIsEnumerable.call(errorProto, 'message') || + propertyIsEnumerable.call(errorProto, 'name'); /** - * Used to detect `data` property values to inject. + * Detect if `prototype` properties are enumerable by default. + * + * Firefox < 3.6, Opera > 9.50 - Opera < 11.60, and Safari < 5.1 + * (if the prototype or a property on the prototype has been set) + * incorrectly set the `[[Enumerable]]` value of a function's `prototype` + * property to `true`. * - * @static - * @memberOf _.templateSettings - * @type RegExp + * @memberOf _.support + * @type boolean */ - 'interpolate': reInterpolate, + support.enumPrototypes = propertyIsEnumerable.call(Ctor, 'prototype'); /** - * Used to reference the data object in the template text. + * Detect if properties shadowing those on `Object.prototype` are non-enumerable. * - * @static - * @memberOf _.templateSettings - * @type String + * In IE < 9 an object's own properties, shadowing non-enumerable ones, + * are made non-enumerable as well (a.k.a the JScript `[[DontEnum]]` bug). + * + * @memberOf _.support + * @type boolean */ - 'variable': '' - }; - - /*--------------------------------------------------------------------------*/ - - /** - * The template used to create iterator functions. - * - * @private - * @param {Obect} data The data object used to populate the text. - * @returns {String} Returns the interpolated text. - */ - var iteratorTemplate = template( - // conditional strict mode - "<% if (obj.useStrict) { %>'use strict';\n<% } %>" + - - // the `iteratee` may be reassigned by the `top` snippet - 'var index, iteratee = <%= firstArg %>, ' + - // assign the `result` variable an initial value - 'result = <%= firstArg %>;\n' + - // exit early if the first argument is falsey - 'if (!<%= firstArg %>) return result;\n' + - // add code before the iteration branches - '<%= top %>;\n' + - - // array-like iteration: - '<% if (arrayLoop) { %>' + - 'var length = iteratee.length; index = -1;\n' + - "if (typeof length == 'number') {" + - - // add support for accessing string characters by index if needed - ' <% if (noCharByIndex) { %>\n' + - ' if (isString(iteratee)) {\n' + - " iteratee = iteratee.split('')\n" + - ' }' + - ' <% } %>\n' + - - // iterate over the array-like value - ' while (++index < length) {\n' + - ' <%= arrayLoop %>\n' + - ' }\n' + - '}\n' + - 'else {' + - - // object iteration: - // add support for iterating over `arguments` objects if needed - ' <% } else if (nonEnumArgs) { %>\n' + - ' var length = iteratee.length; index = -1;\n' + - ' if (length && isArguments(iteratee)) {\n' + - ' while (++index < length) {\n' + - " index += '';\n" + - ' <%= objectLoop %>\n' + - ' }\n' + - ' } else {' + - ' <% } %>' + - - // Firefox < 3.6, Opera > 9.50 - Opera < 11.60, and Safari < 5.1 - // (if the prototype or a property on the prototype has been set) - // incorrectly sets a function's `prototype` property [[Enumerable]] - // value to `true`. Because of this Lo-Dash standardizes on skipping - // the the `prototype` property of functions regardless of its - // [[Enumerable]] value. - ' <% if (!hasDontEnumBug) { %>\n' + - " var skipProto = typeof iteratee == 'function' && \n" + - " propertyIsEnumerable.call(iteratee, 'prototype');\n" + - ' <% } %>' + - - // iterate own properties using `Object.keys` if it's fast - ' <% if (isKeysFast && useHas) { %>\n' + - ' var ownIndex = -1,\n' + - ' ownProps = objectTypes[typeof iteratee] ? nativeKeys(iteratee) : [],\n' + - ' length = ownProps.length;\n\n' + - ' while (++ownIndex < length) {\n' + - ' index = ownProps[ownIndex];\n' + - " <% if (!hasDontEnumBug) { %>if (!(skipProto && index == 'prototype')) {\n <% } %>" + - ' <%= objectLoop %>\n' + - ' <% if (!hasDontEnumBug) { %>}\n<% } %>' + - ' }' + - - // else using a for-in loop - ' <% } else { %>\n' + - ' for (index in iteratee) {<%' + - ' if (!hasDontEnumBug || useHas) { %>\n if (<%' + - " if (!hasDontEnumBug) { %>!(skipProto && index == 'prototype')<% }" + - ' if (!hasDontEnumBug && useHas) { %> && <% }' + - ' if (useHas) { %>hasOwnProperty.call(iteratee, index)<% }' + - ' %>) {' + - ' <% } %>\n' + - ' <%= objectLoop %>;' + - ' <% if (!hasDontEnumBug || useHas) { %>\n }<% } %>\n' + - ' }' + - ' <% } %>' + - - // Because IE < 9 can't set the `[[Enumerable]]` attribute of an - // existing property and the `constructor` property of a prototype - // defaults to non-enumerable, Lo-Dash skips the `constructor` - // property when it infers it's iterating over a `prototype` object. - ' <% if (hasDontEnumBug) { %>\n\n' + - ' var ctor = iteratee.constructor;\n' + - ' <% for (var k = 0; k < 7; k++) { %>\n' + - " index = '<%= shadowed[k] %>';\n" + - ' if (<%' + - " if (shadowed[k] == 'constructor') {" + - ' %>!(ctor && ctor.prototype === iteratee) && <%' + - ' } %>hasOwnProperty.call(iteratee, index)) {\n' + - ' <%= objectLoop %>\n' + - ' }' + - ' <% } %>' + - ' <% } %>' + - ' <% if (arrayLoop || nonEnumArgs) { %>\n}<% } %>\n' + - - // add code to the bottom of the iteration function - '<%= bottom %>;\n' + - // finally, return the `result` - 'return result' - ); + support.nonEnumShadows = !/valueOf/.test(props); - /** Reusable iterator options for `assign` and `defaults` */ - var assignIteratorOptions = { - 'args': 'object, source, guard', - 'top': - "for (var argsIndex = 1, argsLength = typeof guard == 'number' ? 2 : arguments.length; argsIndex < argsLength; argsIndex++) {\n" + - ' if ((iteratee = arguments[argsIndex])) {', - 'objectLoop': 'result[index] = iteratee[index]', - 'bottom': ' }\n}' - }; + /** + * Detect if own properties are iterated after inherited properties (IE < 9). + * + * @memberOf _.support + * @type boolean + */ + support.ownLast = props[0] != 'x'; - /** - * Reusable iterator options shared by `each`, `forIn`, and `forOwn`. - */ - var eachIteratorOptions = { - 'args': 'collection, callback, thisArg', - 'top': "callback = callback && typeof thisArg == 'undefined' ? callback : createCallback(callback, thisArg)", - 'arrayLoop': 'if (callback(iteratee[index], index, collection) === false) return result', - 'objectLoop': 'if (callback(iteratee[index], index, collection) === false) return result' - }; + /** + * Detect if `Array#shift` and `Array#splice` augment array-like objects + * correctly. + * + * Firefox < 10, compatibility modes of IE 8, and IE < 9 have buggy Array + * `shift()` and `splice()` functions that fail to remove the last element, + * `value[0]`, of array-like objects even though the "length" property is + * set to `0`. The `shift()` method is buggy in compatibility modes of IE 8, + * while `splice()` is buggy regardless of mode in IE < 9. + * + * @memberOf _.support + * @type boolean + */ + support.spliceObjects = (splice.call(object, 0, 1), !object[0]); - /** Reusable iterator options for `forIn` and `forOwn` */ - var forOwnIteratorOptions = { - 'arrayLoop': null - }; + /** + * Detect lack of support for accessing string characters by index. + * + * IE < 8 can't access characters by index. IE 8 can only access characters + * by index on string literals, not string objects. + * + * @memberOf _.support + * @type boolean + */ + support.unindexedChars = ('x'[0] + Object('x')[0]) != 'xx'; + }(1, 0)); - /*--------------------------------------------------------------------------*/ + /*------------------------------------------------------------------------*/ /** - * Creates a function optimized to search large arrays for a given `value`, - * starting at `fromIndex`, using strict equality for comparisons, i.e. `===`. + * Creates a lazy wrapper object which wraps `value` to enable lazy evaluation. * * @private - * @param {Array} array The array to search. - * @param {Mixed} value The value to search for. - * @param {Number} [fromIndex=0] The index to search from. - * @param {Number} [largeSize=30] The length at which an array is considered large. - * @returns {Boolean} Returns `true` if `value` is found, else `false`. + * @param {*} value The value to wrap. */ - function cachedContains(array, fromIndex, largeSize) { - fromIndex || (fromIndex = 0); - - var length = array.length, - isLarge = (length - fromIndex) >= (largeSize || largeArraySize); - - if (isLarge) { - var cache = {}, - index = fromIndex - 1; - - while (++index < length) { - // manually coerce `value` to a string because `hasOwnProperty`, in some - // older versions of Firefox, coerces objects incorrectly - var key = array[index] + ''; - (hasOwnProperty.call(cache, key) ? cache[key] : (cache[key] = [])).push(array[index]); - } - } - return function(value) { - if (isLarge) { - var key = value + ''; - return hasOwnProperty.call(cache, key) && indexOf(cache[key], value) > -1; - } - return indexOf(array, value, fromIndex) > -1; - } + function LazyWrapper(value) { + this.__wrapped__ = value; + this.__actions__ = null; + this.__dir__ = 1; + this.__dropCount__ = 0; + this.__filtered__ = false; + this.__iteratees__ = null; + this.__takeCount__ = POSITIVE_INFINITY; + this.__views__ = null; } /** - * Used by `_.max` and `_.min` as the default `callback` when a given - * `collection` is a string value. + * Creates a clone of the lazy wrapper object. * * @private - * @param {String} value The character to inspect. - * @returns {Number} Returns the code unit of given character. + * @name clone + * @memberOf LazyWrapper + * @returns {Object} Returns the cloned `LazyWrapper` object. */ - function charAtCallback(value) { - return value.charCodeAt(0); + function lazyClone() { + var actions = this.__actions__, + iteratees = this.__iteratees__, + views = this.__views__, + result = new LazyWrapper(this.__wrapped__); + + result.__actions__ = actions ? arrayCopy(actions) : null; + result.__dir__ = this.__dir__; + result.__filtered__ = this.__filtered__; + result.__iteratees__ = iteratees ? arrayCopy(iteratees) : null; + result.__takeCount__ = this.__takeCount__; + result.__views__ = views ? arrayCopy(views) : null; + return result; } /** - * Used by `sortBy` to compare transformed `collection` values, stable sorting - * them in ascending order. + * Reverses the direction of lazy iteration. * * @private - * @param {Object} a The object to compare to `b`. - * @param {Object} b The object to compare to `a`. - * @returns {Number} Returns the sort order indicator of `1` or `-1`. + * @name reverse + * @memberOf LazyWrapper + * @returns {Object} Returns the new reversed `LazyWrapper` object. */ - function compareAscending(a, b) { - var ai = a.index, - bi = b.index; - - a = a.criteria; - b = b.criteria; - - // ensure a stable sort in V8 and other engines - // http://code.google.com/p/v8/issues/detail?id=90 - if (a !== b) { - if (a > b || typeof a == 'undefined') { - return 1; - } - if (a < b || typeof b == 'undefined') { - return -1; - } + function lazyReverse() { + if (this.__filtered__) { + var result = new LazyWrapper(this); + result.__dir__ = -1; + result.__filtered__ = true; + } else { + result = this.clone(); + result.__dir__ *= -1; } - return ai < bi ? -1 : 1; + return result; } /** - * Creates a function that, when called, invokes `func` with the `this` - * binding of `thisArg` and prepends any `partailArgs` to the arguments passed - * to the bound function. + * Extracts the unwrapped value from its lazy wrapper. * * @private - * @param {Function|String} func The function to bind or the method name. - * @param {Mixed} [thisArg] The `this` binding of `func`. - * @param {Array} partialArgs An array of arguments to be partially applied. - * @returns {Function} Returns the new bound function. + * @name value + * @memberOf LazyWrapper + * @returns {*} Returns the unwrapped value. */ - function createBound(func, thisArg, partialArgs) { - var isFunc = isFunction(func), - isPartial = !partialArgs, - key = thisArg; + function lazyValue() { + var array = this.__wrapped__.value(); + if (!isArray(array)) { + return baseWrapperValue(array, this.__actions__); + } + var dir = this.__dir__, + isRight = dir < 0, + view = getView(0, array.length, this.__views__), + start = view.start, + end = view.end, + length = end - start, + index = isRight ? end : (start - 1), + takeCount = nativeMin(length, this.__takeCount__), + iteratees = this.__iteratees__, + iterLength = iteratees ? iteratees.length : 0, + resIndex = 0, + result = []; - // juggle arguments - if (isPartial) { - partialArgs = thisArg; - } - if (!isFunc) { - thisArg = func; - } + outer: + while (length-- && resIndex < takeCount) { + index += dir; - function bound() { - // `Function#bind` spec - // http://es5.github.com/#x15.3.4.5 - var args = arguments, - thisBinding = isPartial ? this : thisArg; + var iterIndex = -1, + value = array[index]; - if (!isFunc) { - func = thisArg[key]; - } - if (partialArgs.length) { - args = args.length - ? partialArgs.concat(slice(args)) - : partialArgs; - } - if (this instanceof bound) { - // ensure `new bound` is an instance of `bound` and `func` - noop.prototype = func.prototype; - thisBinding = new noop; - noop.prototype = null; - - // mimic the constructor's `return` behavior - // http://es5.github.com/#x13.2.2 - var result = func.apply(thisBinding, args); - return isObject(result) ? result : thisBinding; + while (++iterIndex < iterLength) { + var data = iteratees[iterIndex], + iteratee = data.iteratee, + type = data.type; + + if (type == LAZY_DROP_WHILE_FLAG) { + if (data.done && (isRight ? (index > data.index) : (index < data.index))) { + data.count = 0; + data.done = false; + } + data.index = index; + if (!data.done) { + var limit = data.limit; + if (!(data.done = limit > -1 ? (data.count++ >= limit) : !iteratee(value))) { + continue outer; + } + } + } else { + var computed = iteratee(value); + if (type == LAZY_MAP_FLAG) { + value = computed; + } else if (!computed) { + if (type == LAZY_FILTER_FLAG) { + continue outer; + } else { + break outer; + } + } + } } - return func.apply(thisBinding, args); + result[resIndex++] = value; } - return bound; + return result; } + /*------------------------------------------------------------------------*/ + /** - * Produces an iteration callback bound to an optional `thisArg`. If `func` is - * a property name, the callback will return the property value for a given element. + * + * Creates a cache object to store unique values. * * @private - * @param {Function|String} [func=identity|property] The function called per - * iteration or property name to query. - * @param {Mixed} [thisArg] The `this` binding of `callback`. - * @param {Object} [accumulating] Used to indicate that the callback should - * accept an `accumulator` argument. - * @returns {Function} Returns a callback function. + * @param {Array} [values] The values to cache. */ - function createCallback(func, thisArg, accumulating) { - if (!func) { - return identity; - } - if (typeof func != 'function') { - return function(object) { - return object[func]; - }; - } - if (typeof thisArg != 'undefined') { - if (accumulating) { - return function(accumulator, value, index, object) { - return func.call(thisArg, accumulator, value, index, object); - }; - } - return function(value, index, object) { - return func.call(thisArg, value, index, object); - }; + function SetCache(values) { + var length = values ? values.length : 0; + + this.data = { 'hash': nativeCreate(null), 'set': new Set }; + while (length--) { + this.push(values[length]); } - return func; } /** - * Creates compiled iteration functions. + * Checks if `value` is in `cache` mimicking the return signature of + * `_.indexOf` by returning `0` if the value is found, else `-1`. * * @private - * @param {Object} [options1, options2, ...] The compile options object(s). - * useHas - A boolean to specify using `hasOwnProperty` checks in the object loop. - * args - A string of comma separated arguments the iteration function will accept. - * top - A string of code to execute before the iteration branches. - * arrayLoop - A string of code to execute in the array loop. - * objectLoop - A string of code to execute in the object loop. - * bottom - A string of code to execute after the iteration branches. - * - * @returns {Function} Returns the compiled function. + * @param {Object} cache The cache to search. + * @param {*} value The value to search for. + * @returns {number} Returns `0` if `value` is found, else `-1`. */ - function createIterator() { - var data = { - 'arrayLoop': '', - 'bottom': '', - 'hasDontEnumBug': hasDontEnumBug, - 'isKeysFast': isKeysFast, - 'objectLoop': '', - 'nonEnumArgs': nonEnumArgs, - 'noCharByIndex': noCharByIndex, - 'shadowed': shadowed, - 'top': '', - 'useHas': true - }; - - // merge options into a template data object - for (var object, index = 0; object = arguments[index]; index++) { - for (var key in object) { - data[key] = object[key]; - } - } - var args = data.args; - data.firstArg = /^[^,]+/.exec(args)[0]; - - // create the function factory - var factory = Function( - 'createCallback, hasOwnProperty, isArguments, isString, objectTypes, ' + - 'nativeKeys, propertyIsEnumerable', - 'return function(' + args + ') {\n' + iteratorTemplate(data) + '\n}' - ); - // return the compiled function - return factory( - createCallback, hasOwnProperty, isArguments, isString, objectTypes, - nativeKeys, propertyIsEnumerable - ); + function cacheIndexOf(cache, value) { + var data = cache.data, + result = (typeof value == 'string' || isObject(value)) ? data.set.has(value) : data.hash[value]; + + return result ? 0 : -1; } /** - * A function compiled to iterate `arguments` objects, arrays, objects, and - * strings consistenly across environments, executing the `callback` for each - * element in the `collection`. The `callback` is bound to `thisArg` and invoked - * with three arguments; (value, index|key, collection). Callbacks may exit - * iteration early by explicitly returning `false`. + * Adds `value` to the cache. * * @private - * @param {Array|Object|String} collection The collection to iterate over. - * @param {Function} [callback=identity] The function called per iteration. - * @param {Mixed} [thisArg] The `this` binding of `callback`. - * @returns {Array|Object|String} Returns `collection`. + * @name push + * @memberOf SetCache + * @param {*} value The value to cache. */ - var each = createIterator(eachIteratorOptions); + function cachePush(value) { + var data = this.data; + if (typeof value == 'string' || isObject(value)) { + data.set.add(value); + } else { + data.hash[value] = true; + } + } + + /*------------------------------------------------------------------------*/ /** - * Used by `template` to escape characters for inclusion in compiled - * string literals. + * Copies the values of `source` to `array`. * * @private - * @param {String} match The matched character to escape. - * @returns {String} Returns the escaped character. + * @param {Array} source The array to copy values from. + * @param {Array} [array=[]] The array to copy values to. + * @returns {Array} Returns `array`. */ - function escapeStringChar(match) { - return '\\' + stringEscapes[match]; + function arrayCopy(source, array) { + var index = -1, + length = source.length; + + array || (array = Array(length)); + while (++index < length) { + array[index] = source[index]; + } + return array; } /** - * Used by `escape` to convert characters to HTML entities. + * A specialized version of `_.forEach` for arrays without support for callback + * shorthands and `this` binding. * * @private - * @param {String} match The matched character to escape. - * @returns {String} Returns the escaped character. + * @param {Array} array The array to iterate over. + * @param {Function} iteratee The function invoked per iteration. + * @returns {Array} Returns `array`. */ - function escapeHtmlChar(match) { - return htmlEscapes[match]; + function arrayEach(array, iteratee) { + var index = -1, + length = array.length; + + while (++index < length) { + if (iteratee(array[index], index, array) === false) { + break; + } + } + return array; } /** - * Checks if `value` is a DOM node in IE < 9. + * A specialized version of `_.every` for arrays without support for callback + * shorthands and `this` binding. * * @private - * @param {Mixed} value The value to check. - * @returns {Boolean} Returns `true` if the `value` is a DOM node, else `false`. + * @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 isNode(value) { - // IE < 9 presents DOM nodes as `Object` objects except they have `toString` - // methods that are `typeof` "string" and still can coerce nodes to strings - return typeof value.toString != 'function' && typeof (value + '') == 'string'; + function arrayEvery(array, predicate) { + var index = -1, + length = array.length; + + while (++index < length) { + if (!predicate(array[index], index, array)) { + return false; + } + } + return true; } /** - * A no-operation function. + * A specialized version of `_.filter` for arrays without support for callback + * shorthands and `this` binding. * * @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 noop() { - // no operation performed + function arrayFilter(array, predicate) { + var index = -1, + length = array.length, + resIndex = -1, + result = []; + + while (++index < length) { + var value = array[index]; + if (predicate(value, index, array)) { + result[++resIndex] = value; + } + } + return result; } /** - * Slices the `collection` from the `start` index up to, but not including, - * the `end` index. - * - * Note: This function is used, instead of `Array#slice`, to support node lists - * in IE < 9 and to ensure dense arrays are returned. + * A specialized version of `_.map` for arrays without support for callback + * shorthands and `this` binding. * * @private - * @param {Array|Object|String} collection The collection to slice. - * @param {Number} start The start index. - * @param {Number} end The end index. - * @returns {Array} Returns the new array. + * @param {Array} array The array to iterate over. + * @param {Function} iteratee The function invoked per iteration. + * @returns {Array} Returns the new mapped array. */ - function slice(array, start, end) { - start || (start = 0); - if (typeof end == 'undefined') { - end = array ? array.length : 0; - } + function arrayMap(array, iteratee) { var index = -1, - length = end - start || 0, - result = Array(length < 0 ? 0 : length); + length = array.length, + result = Array(length); while (++index < length) { - result[index] = array[start + index]; + result[index] = iteratee(array[index], index, array); } return result; } /** - * Used by `unescape` to convert HTML entities to characters. + * A specialized version of `_.reduce` for arrays without support for callback + * shorthands and `this` binding. * * @private - * @param {String} match The matched character to unescape. - * @returns {String} Returns the unescaped character. + * @param {Array} array The array to iterate over. + * @param {Function} iteratee The function invoked per iteration. + * @param {*} [accumulator] The initial value. + * @param {boolean} [initFromArray] Specify using the first element of `array` + * as the initial value. + * @returns {*} Returns the accumulated value. */ - function unescapeHtmlChar(match) { - return htmlUnescapes[match]; - } + function arrayReduce(array, iteratee, accumulator, initFromArray) { + var index = -1, + length = array.length; - /*--------------------------------------------------------------------------*/ + if (initFromArray && length) { + accumulator = array[++index]; + } + while (++index < length) { + accumulator = iteratee(accumulator, array[index], index, array); + } + return accumulator; + } /** - * Assigns own enumerable properties of source object(s) to the `destination` - * object. Subsequent sources will overwrite propery assignments of previous - * sources. + * A specialized version of `_.some` for arrays without support for callback + * shorthands and `this` binding. * - * @static - * @memberOf _ - * @alias extend - * @category Objects - * @param {Object} object The destination object. - * @param {Object} [source1, source2, ...] The source objects. - * @returns {Object} Returns the destination object. - * @example - * - * _.assign({ 'name': 'moe' }, { 'age': 40 }); - * // => { 'name': 'moe', 'age': 40 } + * @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`. */ - var assign = createIterator(assignIteratorOptions); + function arraySome(array, predicate) { + var index = -1, + length = array.length; - /** - * Checks if `value` is an `arguments` object. - * - * @static - * @memberOf _ - * @category Objects - * @param {Mixed} value The value to check. - * @returns {Boolean} Returns `true` if the `value` is an `arguments` object, else `false`. - * @example - * - * (function() { return _.isArguments(arguments); })(1, 2, 3); - * // => true - * - * _.isArguments([1, 2, 3]); - * // => false - */ - function isArguments(value) { - return toString.call(value) == argsClass; - } - // fallback for browsers that can't detect `arguments` objects by [[Class]] - if (noArgsClass) { - isArguments = function(value) { - return value ? hasOwnProperty.call(value, 'callee') : false; - }; + while (++index < length) { + if (predicate(array[index], index, array)) { + return true; + } + } + return false; } /** - * Iterates over `object`'s own and inherited enumerable properties, executing - * the `callback` for each property. The `callback` is bound to `thisArg` and - * invoked with three arguments; (value, key, object). Callbacks may exit iteration - * early by explicitly returning `false`. + * A specialized version of `_.assign` for customizing assigned values without + * support for argument juggling, multiple sources, and `this` binding `customizer` + * functions. * - * @static - * @memberOf _ - * @category Objects - * @param {Object} object The object to iterate over. - * @param {Function} [callback=identity] The function called per iteration. - * @param {Mixed} [thisArg] The `this` binding of `callback`. + * @private + * @param {Object} object The destination object. + * @param {Object} source The source object. + * @param {Function} customizer The function to customize assigned values. * @returns {Object} Returns `object`. - * @example - * - * function Dog(name) { - * this.name = name; - * } - * - * Dog.prototype.bark = function() { - * alert('Woof, woof!'); - * }; - * - * _.forIn(new Dog('Dagny'), function(value, key) { - * alert(key); - * }); - * // => alerts 'name' and 'bark' (order is not guaranteed) */ - var forIn = createIterator(eachIteratorOptions, forOwnIteratorOptions, { - 'useHas': false - }); + function assignWith(object, source, customizer) { + var index = -1, + props = keys(source), + length = props.length; - /** - * Iterates over an object's own enumerable properties, executing the `callback` - * for each property. The `callback` is bound to `thisArg` and invoked with three - * arguments; (value, key, object). Callbacks may exit iteration early by explicitly - * returning `false`. - * - * @static - * @memberOf _ - * @category Objects - * @param {Object} object The object to iterate over. - * @param {Function} [callback=identity] The function called per iteration. - * @param {Mixed} [thisArg] The `this` binding of `callback`. - * @returns {Object} Returns `object`. - * @example - * - * _.forOwn({ '0': 'zero', '1': 'one', 'length': 2 }, function(num, key) { - * alert(key); - * }); - * // => alerts '0', '1', and 'length' (order is not guaranteed) - */ - var forOwn = createIterator(eachIteratorOptions, forOwnIteratorOptions); + while (++index < length) { + var key = props[index], + value = object[key], + result = customizer(value, source[key], key, object, source); - /** - * A fallback implementation of `isPlainObject` that checks if a given `value` - * is an object created by the `Object` constructor, assuming objects created - * by the `Object` constructor have no inherited enumerable properties and that - * there are no `Object.prototype` extensions. - * - * @private - * @param {Mixed} value The value to check. - * @returns {Boolean} Returns `true` if `value` is a plain object, else `false`. - */ - function shimIsPlainObject(value) { - // avoid non-objects and false positives for `arguments` objects - var result = false; - if (!(value && typeof value == 'object') || isArguments(value)) { - return result; - } - // check that the constructor is `Object` (i.e. `Object instanceof Object`) - var ctor = value.constructor; - if ((!isFunction(ctor) && (!noNodeClass || !isNode(value))) || ctor instanceof ctor) { - // IE < 9 iterates inherited properties before own properties. If the first - // iterated property is an object's own property then there are no inherited - // enumerable properties. - if (iteratesOwnLast) { - forIn(value, function(value, key, object) { - result = !hasOwnProperty.call(object, key); - return false; - }); - return result === false; + if ((result === result ? (result !== value) : (value === value)) || + (value === undefined && !(key in object))) { + object[key] = result; } - // In most environments an object's own properties are iterated before - // its inherited properties. If the last iterated property is an object's - // own property then there are no inherited enumerable properties. - forIn(value, function(value, key) { - result = key; - }); - return result === false || hasOwnProperty.call(value, result); } - return result; + return object; } /** - * A fallback implementation of `Object.keys` that produces an array of the - * given object's own enumerable property names. + * The base implementation of `_.assign` without support for argument juggling, + * multiple sources, and `customizer` functions. * * @private - * @param {Object} object The object to inspect. - * @returns {Array} Returns a new array of property names. + * @param {Object} object The destination object. + * @param {Object} source The source object. + * @returns {Object} Returns `object`. */ - function shimKeys(object) { - var result = []; - forOwn(object, function(value, key) { - result.push(key); - }); - return result; + function baseAssign(object, source) { + return source == null + ? object + : baseCopy(source, keys(source), object); } /** - * Used to convert characters to HTML entities: + * Copies properties of `source` to `object`. * - * Though the `>` character is escaped for symmetry, characters like `>` and `/` - * don't require escaping in HTML and have no special meaning unless they're part - * of a tag or an unquoted attribute value. - * http://mathiasbynens.be/notes/ambiguous-ampersands (under "semi-related fun fact") + * @private + * @param {Object} source The object to copy properties from. + * @param {Array} props The property names to copy. + * @param {Object} [object={}] The object to copy properties to. + * @returns {Object} Returns `object`. */ - var htmlEscapes = { - '&': '&', - '<': '<', - '>': '>', - '"': '"', - "'": ''' - }; + function baseCopy(source, props, object) { + object || (object = {}); - /** Used to convert HTML entities to characters */ - var htmlUnescapes = invert(htmlEscapes); + var index = -1, + length = props.length; - /*--------------------------------------------------------------------------*/ + while (++index < length) { + var key = props[index]; + object[key] = source[key]; + } + return object; + } /** - * Creates a clone of `value`. If `deep` is `true`, nested objects will also - * be cloned, otherwise they will be assigned by reference. - * - * @static - * @memberOf _ - * @category Objects - * @param {Mixed} value The value to clone. - * @param {Boolean} deep A flag to indicate a deep clone. - * @param- {Object} [guard] Internally used to allow this method to work with - * others like `_.map` without using their callback `index` argument for `deep`. - * @param- {Array} [stackA=[]] Internally used to track traversed source objects. - * @param- {Array} [stackB=[]] Internally used to associate clones with their - * source counterparts. - * @returns {Mixed} Returns the cloned `value`. - * @example - * - * var stooges = [ - * { 'name': 'moe', 'age': 40 }, - * { 'name': 'larry', 'age': 50 }, - * { 'name': 'curly', 'age': 60 } - * ]; - * - * var shallow = _.clone(stooges); - * shallow[0] === stooges[0]; - * // => true + * The base implementation of `_.callback` which supports specifying the + * number of arguments to provide to `func`. * - * var deep = _.clone(stooges, true); - * deep[0] === stooges[0]; - * // => false + * @private + * @param {*} [func=_.identity] The value to convert to a callback. + * @param {*} [thisArg] The `this` binding of `func`. + * @param {number} [argCount] The number of arguments to provide to `func`. + * @returns {Function} Returns the callback. */ - function clone(value, deep, guard, stackA, stackB) { - if (value == null) { - return value; + function baseCallback(func, thisArg, argCount) { + var type = typeof func; + if (type == 'function') { + return thisArg === undefined + ? func + : bindCallback(func, thisArg, argCount); + } + if (func == null) { + return identity; } - if (guard) { - deep = false; + if (type == 'object') { + return baseMatches(func); } - // inspect [[Class]] - var isObj = isObject(value); - if (isObj) { - var className = toString.call(value); - if (!cloneableClasses[className] || (noNodeClass && isNode(value))) { - return value; - } - var isArr = isArray(value); + return thisArg === undefined + ? property(func) + : baseMatchesProperty(func, thisArg); + } + + /** + * The base implementation of `_.clone` without support for argument juggling + * and `this` binding `customizer` functions. + * + * @private + * @param {*} value The value to clone. + * @param {boolean} [isDeep] Specify a deep clone. + * @param {Function} [customizer] The function to customize cloning values. + * @param {string} [key] The key of `value`. + * @param {Object} [object] The object `value` belongs to. + * @param {Array} [stackA=[]] Tracks traversed source objects. + * @param {Array} [stackB=[]] Associates clones with source counterparts. + * @returns {*} Returns the cloned value. + */ + function baseClone(value, isDeep, customizer, key, object, stackA, stackB) { + var result; + if (customizer) { + result = object ? customizer(value, key, object) : customizer(value); + } + if (result !== undefined) { + return result; } - // shallow clone - if (!isObj || !deep) { - return isObj - ? (isArr ? slice(value) : assign({}, value)) - : value; + if (!isObject(value)) { + return value; } - var ctor = ctorByClass[className]; - switch (className) { - case boolClass: - case dateClass: - return new ctor(+value); - - case numberClass: - case stringClass: - return new ctor(value); + var isArr = isArray(value); + if (isArr) { + result = initCloneArray(value); + if (!isDeep) { + return arrayCopy(value, result); + } + } else { + var tag = objToString.call(value), + isFunc = tag == funcTag; - case regexpClass: - return ctor(value.source, reFlags.exec(value)); + if (tag == objectTag || tag == argsTag || (isFunc && !object)) { + if (isHostObject(value)) { + return object ? value : {}; + } + result = initCloneObject(isFunc ? {} : value); + if (!isDeep) { + return baseAssign(result, value); + } + } else { + return cloneableTags[tag] + ? initCloneByTag(value, tag, isDeep) + : (object ? value : {}); + } } - // check for circular references and return corresponding clone + // Check for circular references and return corresponding clone. stackA || (stackA = []); stackB || (stackB = []); @@ -7688,67108 +8747,31816 @@ var JXON = new (function () { return stackB[length]; } } - // init cloned object - var result = isArr ? ctor(value.length) : {}; - - // add the source value to the stack of traversed objects - // and associate it with its clone + // Add the source value to the stack of traversed objects and associate it with its clone. stackA.push(value); stackB.push(result); - // recursively populate clone (susceptible to call stack limits) - (isArr ? forEach : forOwn)(value, function(objValue, key) { - result[key] = clone(objValue, deep, null, stackA, stackB); + // Recursively populate clone (susceptible to call stack limits). + (isArr ? arrayEach : baseForOwn)(value, function(subValue, key) { + result[key] = baseClone(subValue, isDeep, customizer, key, value, stackA, stackB); }); + return result; + } - // add array properties assigned by `RegExp#exec` - if (isArr) { - if (hasOwnProperty.call(value, 'index')) { - result.index = value.index; + /** + * The base implementation of `_.create` without support for assigning + * properties to the created object. + * + * @private + * @param {Object} prototype The object to inherit from. + * @returns {Object} Returns the new object. + */ + var baseCreate = (function() { + function object() {} + return function(prototype) { + if (isObject(prototype)) { + object.prototype = prototype; + var result = new object; + object.prototype = null; + } + return result || {}; + }; + }()); + + /** + * The base implementation of `_.difference` which accepts a single array + * of values to exclude. + * + * @private + * @param {Array} array The array to inspect. + * @param {Array} values The values to exclude. + * @returns {Array} Returns the new array of filtered values. + */ + function baseDifference(array, values) { + var length = array ? array.length : 0, + result = []; + + if (!length) { + return result; + } + var index = -1, + indexOf = getIndexOf(), + isCommon = indexOf == baseIndexOf, + cache = (isCommon && values.length >= 200) ? createCache(values) : null, + valuesLength = values.length; + + if (cache) { + indexOf = cacheIndexOf; + isCommon = false; + values = cache; + } + outer: + while (++index < length) { + var value = array[index]; + + if (isCommon && value === value) { + var valuesIndex = valuesLength; + while (valuesIndex--) { + if (values[valuesIndex] === value) { + continue outer; + } + } + result.push(value); } - if (hasOwnProperty.call(value, 'input')) { - result.input = value.input; + else if (indexOf(values, value, 0) < 0) { + result.push(value); } } return result; } /** - * Creates a deep clone of `value`. Functions and DOM nodes are **not** cloned. - * The enumerable properties of `arguments` objects and objects created by - * constructors other than `Object` are cloned to plain `Object` objects. - * - * Note: This function is loosely based on the structured clone algorithm. - * See http://www.w3.org/TR/html5/common-dom-interfaces.html#internal-structured-cloning-algorithm. - * - * @static - * @memberOf _ - * @category Objects - * @param {Mixed} value The value to deep clone. - * @returns {Mixed} Returns the deep cloned `value`. - * @example - * - * var stooges = [ - * { 'name': 'moe', 'age': 40 }, - * { 'name': 'larry', 'age': 50 }, - * { 'name': 'curly', 'age': 60 } - * ]; + * The base implementation of `_.forEach` without support for callback + * shorthands and `this` binding. * - * var deep = _.cloneDeep(stooges); - * deep[0] === stooges[0]; - * // => false + * @private + * @param {Array|Object|string} collection The collection to iterate over. + * @param {Function} iteratee The function invoked per iteration. + * @returns {Array|Object|string} Returns `collection`. */ - function cloneDeep(value) { - return clone(value, true); - } + var baseEach = createBaseEach(baseForOwn); /** - * Assigns own enumerable properties of source object(s) to the `destination` - * object for all `destination` properties that resolve to `null`/`undefined`. - * Once a property is set, additional defaults of the same property will be - * ignored. + * The base implementation of `_.every` without support for callback + * shorthands and `this` binding. * - * @static - * @memberOf _ - * @category Objects - * @param {Object} object The destination object. - * @param {Object} [default1, default2, ...] The default objects. - * @returns {Object} Returns the destination object. - * @example - * - * var iceCream = { 'flavor': 'chocolate' }; - * _.defaults(iceCream, { 'flavor': 'vanilla', 'sprinkles': 'rainbow' }); - * // => { 'flavor': 'chocolate', 'sprinkles': 'rainbow' } + * @private + * @param {Array|Object|string} 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` */ - var defaults = createIterator(assignIteratorOptions, { - 'objectLoop': 'if (result[index] == null) ' + assignIteratorOptions.objectLoop - }); + function baseEvery(collection, predicate) { + var result = true; + baseEach(collection, function(value, index, collection) { + result = !!predicate(value, index, collection); + return result; + }); + return result; + } /** - * Creates a sorted array of all enumerable properties, own and inherited, - * of `object` that have function values. - * - * @static - * @memberOf _ - * @alias methods - * @category Objects - * @param {Object} object The object to inspect. - * @returns {Array} Returns a new array of property names that have function values. - * @example + * The base implementation of `_.filter` without support for callback + * shorthands and `this` binding. * - * _.functions(_); - * // => ['all', 'any', 'bind', 'bindAll', 'clone', 'compact', 'compose', ...] + * @private + * @param {Array|Object|string} collection The collection to iterate over. + * @param {Function} predicate The function invoked per iteration. + * @returns {Array} Returns the new filtered array. */ - function functions(object) { + function baseFilter(collection, predicate) { var result = []; - forIn(object, function(value, key) { - if (isFunction(value)) { - result.push(key); + baseEach(collection, function(value, index, collection) { + if (predicate(value, index, collection)) { + result.push(value); } }); - return result.sort(); + return result; } /** - * Checks if the specified object `property` exists and is a direct property, - * instead of an inherited property. - * - * @static - * @memberOf _ - * @category Objects - * @param {Object} object The object to check. - * @param {String} property The property to check for. - * @returns {Boolean} Returns `true` if key is a direct property, else `false`. - * @example + * The base implementation of `_.find`, `_.findLast`, `_.findKey`, and `_.findLastKey`, + * without support for callback shorthands and `this` binding, which iterates + * over `collection` using the provided `eachFunc`. * - * _.has({ 'a': 1, 'b': 2, 'c': 3 }, 'b'); - * // => true + * @private + * @param {Array|Object|string} collection The collection to search. + * @param {Function} predicate The function invoked per iteration. + * @param {Function} eachFunc The function to iterate over `collection`. + * @param {boolean} [retKey] Specify returning the key of the found element + * instead of the element itself. + * @returns {*} Returns the found element or its key, else `undefined`. */ - function has(object, property) { - return object ? hasOwnProperty.call(object, property) : false; + function baseFind(collection, predicate, eachFunc, retKey) { + var result; + eachFunc(collection, function(value, key, collection) { + if (predicate(value, key, collection)) { + result = retKey ? key : value; + return false; + } + }); + return result; } /** - * Creates an object composed of the inverted keys and values of the given `object`. + * The base implementation of `_.flatten` with added support for restricting + * flattening and specifying the start index. * - * @static - * @memberOf _ - * @category Objects - * @param {Object} object The object to invert. - * @returns {Object} Returns the created inverted object. - * @example - * - * _.invert({ 'first': 'Moe', 'second': 'Larry', 'third': 'Curly' }); - * // => { 'Moe': 'first', 'Larry': 'second', 'Curly': 'third' } (order is not guaranteed) + * @private + * @param {Array} array The array to flatten. + * @param {boolean} [isDeep] Specify a deep flatten. + * @param {boolean} [isStrict] Restrict flattening to arrays-like objects. + * @returns {Array} Returns the new flattened array. */ - function invert(object) { - var result = {}; - forOwn(object, function(value, key) { - result[value] = key; - }); + function baseFlatten(array, isDeep, isStrict) { + var index = -1, + length = array.length, + resIndex = -1, + result = []; + + while (++index < length) { + var value = array[index]; + if (isObjectLike(value) && isArrayLike(value) && + (isStrict || isArray(value) || isArguments(value))) { + if (isDeep) { + // Recursively flatten arrays (susceptible to call stack limits). + value = baseFlatten(value, isDeep, isStrict); + } + var valIndex = -1, + valLength = value.length; + + while (++valIndex < valLength) { + result[++resIndex] = value[valIndex]; + } + } else if (!isStrict) { + result[++resIndex] = value; + } + } return result; } /** - * Checks if `value` is an array. - * - * @static - * @memberOf _ - * @category Objects - * @param {Mixed} value The value to check. - * @returns {Boolean} Returns `true` if the `value` is an array, else `false`. - * @example - * - * (function() { return _.isArray(arguments); })(); - * // => false + * The base implementation of `baseForIn` and `baseForOwn` which iterates + * over `object` properties returned by `keysFunc` invoking `iteratee` for + * each property. Iteratee functions may exit iteration early by explicitly + * returning `false`. * - * _.isArray([1, 2, 3]); - * // => true + * @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 isArray = nativeIsArray || function(value) { - // `instanceof` may cause a memory leak in IE 7 if `value` is a host object - // http://ajaxian.com/archives/working-aroung-the-instanceof-memory-leak - return (argsAreObjects && value instanceof Array) || toString.call(value) == arrayClass; - }; + var baseFor = createBaseFor(); /** - * Checks if `value` is a boolean (`true` or `false`) value. - * - * @static - * @memberOf _ - * @category Objects - * @param {Mixed} value The value to check. - * @returns {Boolean} Returns `true` if the `value` is a boolean value, else `false`. - * @example + * The base implementation of `_.forIn` without support for callback + * shorthands and `this` binding. * - * _.isBoolean(null); - * // => false + * @private + * @param {Object} object The object to iterate over. + * @param {Function} iteratee The function invoked per iteration. + * @returns {Object} Returns `object`. */ - function isBoolean(value) { - return value === true || value === false || toString.call(value) == boolClass; + function baseForIn(object, iteratee) { + return baseFor(object, iteratee, keysIn); } /** - * Checks if `value` is a date. - * - * @static - * @memberOf _ - * @category Objects - * @param {Mixed} value The value to check. - * @returns {Boolean} Returns `true` if the `value` is a date, else `false`. - * @example + * The base implementation of `_.forOwn` without support for callback + * shorthands and `this` binding. * - * _.isDate(new Date); - * // => true + * @private + * @param {Object} object The object to iterate over. + * @param {Function} iteratee The function invoked per iteration. + * @returns {Object} Returns `object`. */ - function isDate(value) { - return value instanceof Date || toString.call(value) == dateClass; + function baseForOwn(object, iteratee) { + return baseFor(object, iteratee, keys); } /** - * Checks if `value` is a DOM element. - * - * @static - * @memberOf _ - * @category Objects - * @param {Mixed} value The value to check. - * @returns {Boolean} Returns `true` if the `value` is a DOM element, else `false`. - * @example + * The base implementation of `_.functions` which creates an array of + * `object` function property names filtered from those provided. * - * _.isElement(document.body); - * // => true + * @private + * @param {Object} object The object to inspect. + * @param {Array} props The property names to filter. + * @returns {Array} Returns the new array of filtered property names. */ - function isElement(value) { - return value ? value.nodeType === 1 : false; + function baseFunctions(object, props) { + var index = -1, + length = props.length, + resIndex = -1, + result = []; + + while (++index < length) { + var key = props[index]; + if (isFunction(object[key])) { + result[++resIndex] = key; + } + } + return result; } /** - * Checks if `value` is empty. Arrays, strings, or `arguments` objects with a - * length of `0` and objects with no own enumerable properties are considered - * "empty". - * - * @static - * @memberOf _ - * @category Objects - * @param {Array|Object|String} value The value to inspect. - * @returns {Boolean} Returns `true` if the `value` is empty, else `false`. - * @example - * - * _.isEmpty([1, 2, 3]); - * // => false + * The base implementation of `get` without support for string paths + * and default values. * - * _.isEmpty({}); - * // => true - * - * _.isEmpty(''); - * // => true + * @private + * @param {Object} object The object to query. + * @param {Array} path The path of the property to get. + * @param {string} [pathKey] The key representation of path. + * @returns {*} Returns the resolved value. */ - function isEmpty(value) { - var result = true; - if (!value) { - return result; + function baseGet(object, path, pathKey) { + if (object == null) { + return; } - var className = toString.call(value), - length = value.length; + object = toObject(object); + if (pathKey !== undefined && pathKey in object) { + path = [pathKey]; + } + var index = 0, + length = path.length; - if ((className == arrayClass || className == stringClass || - className == argsClass || (noArgsClass && isArguments(value))) || - (className == objectClass && typeof length == 'number' && isFunction(value.splice))) { - return !length; + while (object != null && index < length) { + object = toObject(object)[path[index++]]; } - forOwn(value, function() { - return (result = false); - }); - return result; + return (index && index == length) ? object : undefined; } /** - * Performs a deep comparison between two values to determine if they are - * equivalent to each other. - * - * @static - * @memberOf _ - * @category Objects - * @param {Mixed} a The value to compare. - * @param {Mixed} b The other value to compare. - * @param- {Object} [stackA=[]] Internally used track traversed `a` objects. - * @param- {Object} [stackB=[]] Internally used track traversed `b` objects. - * @returns {Boolean} Returns `true` if the values are equvalent, else `false`. - * @example - * - * var moe = { 'name': 'moe', 'luckyNumbers': [13, 27, 34] }; - * var clone = { 'name': 'moe', 'luckyNumbers': [13, 27, 34] }; - * - * moe == clone; - * // => false + * The base implementation of `_.isEqual` without support for `this` binding + * `customizer` functions. * - * _.isEqual(moe, clone); - * // => true + * @private + * @param {*} value The value to compare. + * @param {*} other The other value to compare. + * @param {Function} [customizer] The function to customize comparing values. + * @param {boolean} [isLoose] Specify performing partial comparisons. + * @param {Array} [stackA] Tracks traversed `value` objects. + * @param {Array} [stackB] Tracks traversed `other` objects. + * @returns {boolean} Returns `true` if the values are equivalent, else `false`. */ - function isEqual(a, b, stackA, stackB) { - // exit early for identical values - if (a === b) { - // treat `+0` vs. `-0` as not equal - return a !== 0 || (1 / a == 1 / b); + function baseIsEqual(value, other, customizer, isLoose, stackA, stackB) { + if (value === other) { + return true; } - // a strict comparison is necessary because `null == undefined` - if (a == null || b == null) { - return a === b; + if (value == null || other == null || (!isObject(value) && !isObjectLike(other))) { + return value !== value && other !== other; } - // compare [[Class]] names - var className = toString.call(a), - otherName = toString.call(b); + return baseIsEqualDeep(value, other, baseIsEqual, customizer, isLoose, stackA, stackB); + } - if (className == argsClass) { - className = objectClass; + /** + * 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 {Function} equalFunc The function to determine equivalents of values. + * @param {Function} [customizer] The function to customize comparing objects. + * @param {boolean} [isLoose] Specify performing partial comparisons. + * @param {Array} [stackA=[]] Tracks traversed `value` objects. + * @param {Array} [stackB=[]] Tracks traversed `other` objects. + * @returns {boolean} Returns `true` if the objects are equivalent, else `false`. + */ + function baseIsEqualDeep(object, other, equalFunc, customizer, isLoose, stackA, stackB) { + var objIsArr = isArray(object), + othIsArr = isArray(other), + objTag = arrayTag, + othTag = arrayTag; + + if (!objIsArr) { + objTag = objToString.call(object); + if (objTag == argsTag) { + objTag = objectTag; + } else if (objTag != objectTag) { + objIsArr = isTypedArray(object); + } } - if (otherName == argsClass) { - otherName = objectClass; + if (!othIsArr) { + othTag = objToString.call(other); + if (othTag == argsTag) { + othTag = objectTag; + } else if (othTag != objectTag) { + othIsArr = isTypedArray(other); + } } - if (className != otherName) { - return false; + var objIsObj = objTag == objectTag && !isHostObject(object), + othIsObj = othTag == objectTag && !isHostObject(other), + isSameTag = objTag == othTag; + + if (isSameTag && !(objIsArr || objIsObj)) { + return equalByTag(object, other, objTag); } - switch (className) { - case boolClass: - case dateClass: - // coerce dates and booleans to numbers, dates to milliseconds and booleans - // to `1` or `0`, treating invalid dates coerced to `NaN` as not equal - return +a == +b; - - case numberClass: - // treat `NaN` vs. `NaN` as equal - return a != +a - ? b != +b - // but treat `+0` vs. `-0` as not equal - : (a == 0 ? (1 / a == 1 / b) : a == +b); - - case regexpClass: - case stringClass: - // coerce regexes to strings (http://es5.github.com/#x15.10.6.4) - // treat string primitives and their corresponding object instances as equal - return a == b + ''; - } - var isArr = className == arrayClass; - if (!isArr) { - // unwrap any `lodash` wrapped values - if (a.__wrapped__ || b.__wrapped__) { - return isEqual(a.__wrapped__ || a, b.__wrapped__ || b); - } - // exit for functions and DOM nodes - if (className != objectClass || (noNodeClass && (isNode(a) || isNode(b)))) { - return false; - } - // in older versions of Opera, `arguments` objects have `Array` constructors - var ctorA = !argsAreObjects && isArguments(a) ? Object : a.constructor, - ctorB = !argsAreObjects && isArguments(b) ? Object : b.constructor; - - // non `Object` object instances with different constructors are not equal - if (ctorA != ctorB && !( - isFunction(ctorA) && ctorA instanceof ctorA && - isFunction(ctorB) && ctorB instanceof ctorB - )) { - return false; + if (!isLoose) { + var objIsWrapped = objIsObj && hasOwnProperty.call(object, '__wrapped__'), + othIsWrapped = othIsObj && hasOwnProperty.call(other, '__wrapped__'); + + if (objIsWrapped || othIsWrapped) { + return equalFunc(objIsWrapped ? object.value() : object, othIsWrapped ? other.value() : other, customizer, isLoose, stackA, stackB); } } - // assume cyclic structures are equal - // the algorithm for detecting cyclic structures is adapted from ES 5.1 - // section 15.12.3, abstract operation `JO` (http://es5.github.com/#x15.12.3) + if (!isSameTag) { + return false; + } + // Assume cyclic values are equal. + // For more information on detecting circular references see https://es5.github.io/#JO. stackA || (stackA = []); stackB || (stackB = []); var length = stackA.length; while (length--) { - if (stackA[length] == a) { - return stackB[length] == b; + if (stackA[length] == object) { + return stackB[length] == other; } } - var index = -1, - result = true, - size = 0; + // Add `object` and `other` to the stack of traversed objects. + stackA.push(object); + stackB.push(other); - // add `a` and `b` to the stack of traversed objects - stackA.push(a); - stackB.push(b); + var result = (objIsArr ? equalArrays : equalObjects)(object, other, equalFunc, customizer, isLoose, stackA, stackB); - // recursively compare objects and arrays (susceptible to call stack limits) - if (isArr) { - // compare lengths to determine if a deep comparison is necessary - size = a.length; - result = size == b.length; + stackA.pop(); + stackB.pop(); - if (result) { - // deep compare the contents, ignoring non-numeric properties - while (size--) { - if (!(result = isEqual(a[size], b[size], stackA, stackB))) { - break; - } - } - } - return result; + return result; + } + + /** + * The base implementation of `_.isMatch` without support for callback + * shorthands and `this` binding. + * + * @private + * @param {Object} object The object to inspect. + * @param {Array} matchData The propery names, values, and compare flags to match. + * @param {Function} [customizer] The function to customize comparing objects. + * @returns {boolean} Returns `true` if `object` is a match, else `false`. + */ + function baseIsMatch(object, matchData, customizer) { + var index = matchData.length, + length = index, + noCustomizer = !customizer; + + if (object == null) { + return !length; } - // deep compare objects using `forIn`, instead of `forOwn`, to avoid `Object.keys` - // which, in this case, is more costly - forIn(a, function(value, key, a) { - if (hasOwnProperty.call(a, key)) { - // count the number of properties. - size++; - // deep compare each property value. - return (result = hasOwnProperty.call(b, key) && isEqual(value, b[key], stackA, stackB)); + object = toObject(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]; - if (result) { - // ensure both objects have the same number of properties - forIn(b, function(value, key, b) { - if (hasOwnProperty.call(b, key)) { - // `size` will be `-1` if `b` has more properties than `a` - return (result = --size > -1); + if (noCustomizer && data[2]) { + if (objValue === undefined && !(key in object)) { + return false; } - }); + } else { + var result = customizer ? customizer(objValue, srcValue, key) : undefined; + if (!(result === undefined ? baseIsEqual(srcValue, objValue, customizer, true) : result)) { + return false; + } + } } - return result; + return true; } /** - * Checks if `value` is, or can be coerced to, a finite number. - * - * Note: This is not the same as native `isFinite`, which will return true for - * booleans and empty strings. See http://es5.github.com/#x15.1.2.5. - * - * @static - * @memberOf _ - * @category Objects - * @param {Mixed} value The value to check. - * @returns {Boolean} Returns `true` if the `value` is a finite number, else `false`. - * @example - * - * _.isFinite(-101); - * // => true + * The base implementation of `_.map` without support for callback shorthands + * and `this` binding. * - * _.isFinite('10'); - * // => true - * - * _.isFinite(true); - * // => false - * - * _.isFinite(''); - * // => false - * - * _.isFinite(Infinity); - * // => false + * @private + * @param {Array|Object|string} collection The collection to iterate over. + * @param {Function} iteratee The function invoked per iteration. + * @returns {Array} Returns the new mapped array. */ - function isFinite(value) { - return nativeIsFinite(value) && !nativeIsNaN(parseFloat(value)); + function baseMap(collection, iteratee) { + var index = -1, + result = isArrayLike(collection) ? Array(collection.length) : []; + + baseEach(collection, function(value, key, collection) { + result[++index] = iteratee(value, key, collection); + }); + return result; } /** - * Checks if `value` is a function. - * - * @static - * @memberOf _ - * @category Objects - * @param {Mixed} value The value to check. - * @returns {Boolean} Returns `true` if the `value` is a function, else `false`. - * @example + * The base implementation of `_.matches` which does not clone `source`. * - * _.isFunction(_); - * // => true + * @private + * @param {Object} source The object of property values to match. + * @returns {Function} Returns the new function. */ - function isFunction(value) { - return typeof value == 'function'; - } - // fallback for older versions of Chrome and Safari - if (isFunction(/x/)) { - isFunction = function(value) { - return value instanceof Function || toString.call(value) == funcClass; + function baseMatches(source) { + var matchData = getMatchData(source); + if (matchData.length == 1 && matchData[0][2]) { + var key = matchData[0][0], + value = matchData[0][1]; + + return function(object) { + if (object == null) { + return false; + } + object = toObject(object); + return object[key] === value && (value !== undefined || (key in object)); + }; + } + return function(object) { + return baseIsMatch(object, matchData); }; } /** - * Checks if `value` is the language type of Object. - * (e.g. arrays, functions, objects, regexes, `new Number(0)`, and `new String('')`) - * - * @static - * @memberOf _ - * @category Objects - * @param {Mixed} value The value to check. - * @returns {Boolean} Returns `true` if the `value` is an object, else `false`. - * @example + * The base implementation of `_.matchesProperty` which does not clone `srcValue`. * - * _.isObject({}); - * // => true - * - * _.isObject([1, 2, 3]); - * // => true - * - * _.isObject(1); - * // => false + * @private + * @param {string} path The path of the property to get. + * @param {*} srcValue The value to compare. + * @returns {Function} Returns the new function. */ - function isObject(value) { - // check if the value is the ECMAScript language type of Object - // http://es5.github.com/#x8 - // and avoid a V8 bug - // http://code.google.com/p/v8/issues/detail?id=2291 - return value ? objectTypes[typeof value] : false; + function baseMatchesProperty(path, srcValue) { + var isArr = isArray(path), + isCommon = isKey(path) && isStrictComparable(srcValue), + pathKey = (path + ''); + + path = toPath(path); + return function(object) { + if (object == null) { + return false; + } + var key = pathKey; + object = toObject(object); + if ((isArr || !isCommon) && !(key in object)) { + object = path.length == 1 ? object : baseGet(object, baseSlice(path, 0, -1)); + if (object == null) { + return false; + } + key = last(path); + object = toObject(object); + } + return object[key] === srcValue + ? (srcValue !== undefined || (key in object)) + : baseIsEqual(srcValue, object[key], undefined, true); + }; } /** - * Checks if `value` is `NaN`. - * - * Note: This is not the same as native `isNaN`, which will return `true` for - * `undefined` and other values. See http://es5.github.com/#x15.1.2.4. - * - * @static - * @memberOf _ - * @category Objects - * @param {Mixed} value The value to check. - * @returns {Boolean} Returns `true` if the `value` is `NaN`, else `false`. - * @example - * - * _.isNaN(NaN); - * // => true + * The base implementation of `_.merge` without support for argument juggling, + * multiple sources, and `this` binding `customizer` functions. * - * _.isNaN(new Number(NaN)); - * // => true - * - * isNaN(undefined); - * // => true - * - * _.isNaN(undefined); - * // => false + * @private + * @param {Object} object The destination object. + * @param {Object} source The source object. + * @param {Function} [customizer] The function to customize merging properties. + * @param {Array} [stackA=[]] Tracks traversed source objects. + * @param {Array} [stackB=[]] Associates values with source counterparts. + * @returns {Object} Returns `object`. */ - function isNaN(value) { - // `NaN` as a primitive is the only value that is not equal to itself - // (perform the [[Class]] check first to avoid errors with some host objects in IE) - return isNumber(value) && value != +value - } + function baseMerge(object, source, customizer, stackA, stackB) { + if (!isObject(object)) { + return object; + } + var isSrcArr = isArrayLike(source) && (isArray(source) || isTypedArray(source)), + props = isSrcArr ? null : keys(source); - /** - * Checks if `value` is `null`. - * - * @static - * @memberOf _ - * @category Objects - * @param {Mixed} value The value to check. - * @returns {Boolean} Returns `true` if the `value` is `null`, else `false`. - * @example - * - * _.isNull(null); - * // => true - * - * _.isNull(undefined); - * // => false - */ - function isNull(value) { - return value === null; - } + arrayEach(props || source, function(srcValue, key) { + if (props) { + key = srcValue; + srcValue = source[key]; + } + if (isObjectLike(srcValue)) { + stackA || (stackA = []); + stackB || (stackB = []); + baseMergeDeep(object, source, key, baseMerge, customizer, stackA, stackB); + } + else { + var value = object[key], + result = customizer ? customizer(value, srcValue, key, object, source) : undefined, + isCommon = result === undefined; - /** - * Checks if `value` is a number. - * - * @static - * @memberOf _ - * @category Objects - * @param {Mixed} value The value to check. - * @returns {Boolean} Returns `true` if the `value` is a number, else `false`. - * @example - * - * _.isNumber(8.4 * 5); - * // => true - */ - function isNumber(value) { - return typeof value == 'number' || toString.call(value) == numberClass; + if (isCommon) { + result = srcValue; + } + if ((result !== undefined || (isSrcArr && !(key in object))) && + (isCommon || (result === result ? (result !== value) : (value === value)))) { + object[key] = result; + } + } + }); + return object; } /** - * Checks if a given `value` is an object created by the `Object` constructor. - * - * @static - * @memberOf _ - * @category Objects - * @param {Mixed} value The value to check. - * @returns {Boolean} Returns `true` if `value` is a plain object, else `false`. - * @example - * - * function Stooge(name, age) { - * this.name = name; - * this.age = age; - * } - * - * _.isPlainObject(new Stooge('moe', 40)); - * // => false - * - * _.isPlainObject([1, 2, 3]); - * // => false + * 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. * - * _.isPlainObject({ 'name': 'moe', 'age': 40 }); - * // => true + * @private + * @param {Object} object The destination object. + * @param {Object} source The source object. + * @param {string} key The key of the value to merge. + * @param {Function} mergeFunc The function to merge values. + * @param {Function} [customizer] The function to customize merging properties. + * @param {Array} [stackA=[]] Tracks traversed source objects. + * @param {Array} [stackB=[]] Associates values with source counterparts. + * @returns {boolean} Returns `true` if the objects are equivalent, else `false`. */ - var isPlainObject = !getPrototypeOf ? shimIsPlainObject : function(value) { - if (!(value && typeof value == 'object')) { - return false; + function baseMergeDeep(object, source, key, mergeFunc, customizer, stackA, stackB) { + var length = stackA.length, + srcValue = source[key]; + + while (length--) { + if (stackA[length] == srcValue) { + object[key] = stackB[length]; + return; + } } - var valueOf = value.valueOf, - objProto = typeof valueOf == 'function' && (objProto = getPrototypeOf(valueOf)) && getPrototypeOf(objProto); + var value = object[key], + result = customizer ? customizer(value, srcValue, key, object, source) : undefined, + isCommon = result === undefined; - return objProto - ? value == objProto || (getPrototypeOf(value) == objProto && !isArguments(value)) - : shimIsPlainObject(value); - }; + if (isCommon) { + result = srcValue; + if (isArrayLike(srcValue) && (isArray(srcValue) || isTypedArray(srcValue))) { + result = isArray(value) + ? value + : (isArrayLike(value) ? arrayCopy(value) : []); + } + else if (isPlainObject(srcValue) || isArguments(srcValue)) { + result = isArguments(value) + ? toPlainObject(value) + : (isPlainObject(value) ? value : {}); + } + else { + isCommon = false; + } + } + // Add the source value to the stack of traversed objects and associate + // it with its merged value. + stackA.push(srcValue); + stackB.push(result); + + if (isCommon) { + // Recursively merge objects and arrays (susceptible to call stack limits). + object[key] = mergeFunc(result, srcValue, customizer, stackA, stackB); + } else if (result === result ? (result !== value) : (value === value)) { + object[key] = result; + } + } /** - * Checks if `value` is a regular expression. - * - * @static - * @memberOf _ - * @category Objects - * @param {Mixed} value The value to check. - * @returns {Boolean} Returns `true` if the `value` is a regular expression, else `false`. - * @example + * The base implementation of `_.property` without support for deep paths. * - * _.isRegExp(/moe/); - * // => true + * @private + * @param {string} key The key of the property to get. + * @returns {Function} Returns the new function. */ - function isRegExp(value) { - return value instanceof RegExp || toString.call(value) == regexpClass; + function baseProperty(key) { + return function(object) { + return object == null ? undefined : toObject(object)[key]; + }; } /** - * Checks if `value` is a string. - * - * @static - * @memberOf _ - * @category Objects - * @param {Mixed} value The value to check. - * @returns {Boolean} Returns `true` if the `value` is a string, else `false`. - * @example + * A specialized version of `baseProperty` which supports deep paths. * - * _.isString('moe'); - * // => true + * @private + * @param {Array|string} path The path of the property to get. + * @returns {Function} Returns the new function. */ - function isString(value) { - return typeof value == 'string' || toString.call(value) == stringClass; + function basePropertyDeep(path) { + var pathKey = (path + ''); + path = toPath(path); + return function(object) { + return baseGet(object, path, pathKey); + }; } /** - * Checks if `value` is `undefined`. - * - * @static - * @memberOf _ - * @category Objects - * @param {Mixed} value The value to check. - * @returns {Boolean} Returns `true` if the `value` is `undefined`, else `false`. - * @example + * The base implementation of `_.reduce` and `_.reduceRight` without support + * for callback shorthands and `this` binding, which iterates over `collection` + * using the provided `eachFunc`. * - * _.isUndefined(void 0); - * // => true + * @private + * @param {Array|Object|string} collection The collection to iterate over. + * @param {Function} iteratee The function invoked per iteration. + * @param {*} accumulator The initial value. + * @param {boolean} initFromCollection 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 isUndefined(value) { - return typeof value == 'undefined'; + function baseReduce(collection, iteratee, accumulator, initFromCollection, eachFunc) { + eachFunc(collection, function(value, index, collection) { + accumulator = initFromCollection + ? (initFromCollection = false, value) + : iteratee(accumulator, value, index, collection); + }); + return accumulator; } /** - * Creates an array composed of the own enumerable property names of `object`. - * - * @static - * @memberOf _ - * @category Objects - * @param {Object} object The object to inspect. - * @returns {Array} Returns a new array of property names. - * @example + * The base implementation of `setData` without support for hot loop detection. * - * _.keys({ 'one': 1, 'two': 2, 'three': 3 }); - * // => ['one', 'two', 'three'] (order is not guaranteed) + * @private + * @param {Function} func The function to associate metadata with. + * @param {*} data The metadata. + * @returns {Function} Returns `func`. */ - var keys = !nativeKeys ? shimKeys : function(object) { - // avoid iterating over the `prototype` property - return typeof object == 'function' && propertyIsEnumerable.call(object, 'prototype') - ? shimKeys(object) - : (isObject(object) ? nativeKeys(object) : []); + var baseSetData = !metaMap ? identity : function(func, data) { + metaMap.set(func, data); + return func; }; /** - * Merges enumerable properties of the source object(s) into the `destination` - * object. Subsequent sources will overwrite propery assignments of previous - * sources. - * - * @static - * @memberOf _ - * @category Objects - * @param {Object} object The destination object. - * @param {Object} [source1, source2, ...] The source objects. - * @param- {Object} [indicator] Internally used to indicate that the `stack` - * argument is an array of traversed objects instead of another source object. - * @param- {Array} [stackA=[]] Internally used to track traversed source objects. - * @param- {Array} [stackB=[]] Internally used to associate values with their - * source counterparts. - * @returns {Object} Returns the destination object. - * @example - * - * var stooges = [ - * { 'name': 'moe' }, - * { 'name': 'larry' } - * ]; - * - * var ages = [ - * { 'age': 40 }, - * { 'age': 50 } - * ]; + * The base implementation of `_.slice` without an iteratee call guard. * - * _.merge(stooges, ages); - * // => [{ 'name': 'moe', 'age': 40 }, { 'name': 'larry', 'age': 50 }] + * @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 merge(object, source, indicator) { - var args = arguments, - index = 0, - length = 2, - stackA = args[3], - stackB = args[4]; - - if (indicator !== indicatorObject) { - stackA = []; - stackB = []; - - // work with `_.reduce` by only using its callback `accumulator` and `value` arguments - if (typeof indicator != 'number') { - length = args.length; - } + function baseSlice(array, start, end) { + var index = -1, + length = array.length; + + start = start == null ? 0 : (+start || 0); + if (start < 0) { + start = -start > length ? 0 : (length + start); + } + end = (end === undefined || end > length) ? length : (+end || 0); + if (end < 0) { + end += length; } + length = start > end ? 0 : ((end - start) >>> 0); + start >>>= 0; + + var result = Array(length); while (++index < length) { - forOwn(args[index], function(source, key) { - var found, isArr, value; - if (source && ((isArr = isArray(source)) || isPlainObject(source))) { - // avoid merging previously merged cyclic sources - var stackLength = stackA.length; - while (stackLength--) { - found = stackA[stackLength] == source; - if (found) { - break; - } - } - if (found) { - object[key] = stackB[stackLength]; - } - else { - // add `source` and associated `value` to the stack of traversed objects - stackA.push(source); - stackB.push(value = (value = object[key], isArr) - ? (isArray(value) ? value : []) - : (isPlainObject(value) ? value : {}) - ); - // recursively merge objects and arrays (susceptible to call stack limits) - object[key] = merge(value, source, indicatorObject, stackA, stackB); - } - } else if (source != null) { - object[key] = source; - } - }); + result[index] = array[index + start]; } - return object; + return result; } /** - * Creates a shallow clone of `object` excluding the specified properties. - * Property names may be specified as individual arguments or as arrays of - * property names. If `callback` is passed, it will be executed for each property - * in the `object`, omitting the properties `callback` returns truthy for. The - * `callback` is bound to `thisArg` and invoked with three arguments; (value, key, object). - * - * @static - * @memberOf _ - * @category Objects - * @param {Object} object The source object. - * @param {Function|String} callback|[prop1, prop2, ...] The properties to omit - * or the function called per iteration. - * @param {Mixed} [thisArg] The `this` binding of `callback`. - * @returns {Object} Returns an object without the omitted properties. - * @example - * - * _.omit({ 'name': 'moe', 'age': 40, 'userid': 'moe1' }, 'userid'); - * // => { 'name': 'moe', 'age': 40 } + * The base implementation of `_.some` without support for callback shorthands + * and `this` binding. * - * _.omit({ 'name': 'moe', '_hint': 'knucklehead', '_seed': '96c4eb' }, function(value, key) { - * return key.charAt(0) == '_'; - * }); - * // => { 'name': 'moe' } + * @private + * @param {Array|Object|string} 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 omit(object, callback, thisArg) { - var isFunc = typeof callback == 'function', - result = {}; + function baseSome(collection, predicate) { + var result; - if (isFunc) { - callback = createCallback(callback, thisArg); - } else { - var props = concat.apply(arrayRef, arguments); - } - forIn(object, function(value, key, object) { - if (isFunc - ? !callback(value, key, object) - : indexOf(props, key, 1) < 0 - ) { - result[key] = value; - } + baseEach(collection, function(value, index, collection) { + result = predicate(value, index, collection); + return !result; }); - return result; + return !!result; } /** - * Creates a two dimensional array of the given object's key-value pairs, - * i.e. `[[key1, value1], [key2, value2]]`. + * The base implementation of `_.uniq` without support for callback shorthands + * and `this` binding. * - * @static - * @memberOf _ - * @category Objects - * @param {Object} object The object to inspect. - * @returns {Array} Returns new array of key-value pairs. - * @example - * - * _.pairs({ 'moe': 30, 'larry': 40, 'curly': 50 }); - * // => [['moe', 30], ['larry', 40], ['curly', 50]] (order is not guaranteed) + * @private + * @param {Array} array The array to inspect. + * @param {Function} [iteratee] The function invoked per iteration. + * @returns {Array} Returns the new duplicate-value-free array. */ - function pairs(object) { - var result = []; - forOwn(object, function(value, key) { - result.push([key, value]); - }); - return result; - } + function baseUniq(array, iteratee) { + var index = -1, + indexOf = getIndexOf(), + length = array.length, + isCommon = indexOf == baseIndexOf, + isLarge = isCommon && length >= 200, + seen = isLarge ? createCache() : null, + result = []; - /** - * Creates a shallow clone of `object` composed of the specified properties. - * Property names may be specified as individual arguments or as arrays of - * property names. If `callback` is passed, it will be executed for each property - * in the `object`, picking the properties `callback` returns truthy for. The - * `callback` is bound to `thisArg` and invoked with three arguments; (value, key, object). - * - * @static - * @memberOf _ - * @category Objects - * @param {Object} object The source object. - * @param {Function|String} callback|[prop1, prop2, ...] The properties to pick - * or the function called per iteration. - * @param {Mixed} [thisArg] The `this` binding of `callback`. - * @returns {Object} Returns an object composed of the picked properties. - * @example - * - * _.pick({ 'name': 'moe', 'age': 40, 'userid': 'moe1' }, 'name', 'age'); - * // => { 'name': 'moe', 'age': 40 } - * - * _.pick({ 'name': 'moe', '_hint': 'knucklehead', '_seed': '96c4eb' }, function(value, key) { - * return key.charAt(0) != '_'; - * }); - * // => { 'name': 'moe' } - */ - function pick(object, callback, thisArg) { - var result = {}; - if (typeof callback != 'function') { - var index = 0, - props = concat.apply(arrayRef, arguments), - length = props.length; + if (seen) { + indexOf = cacheIndexOf; + isCommon = false; + } else { + isLarge = false; + seen = iteratee ? [] : result; + } + outer: + while (++index < length) { + var value = array[index], + computed = iteratee ? iteratee(value, index, array) : value; - while (++index < length) { - var key = props[index]; - if (key in object) { - result[key] = object[key]; + if (isCommon && value === value) { + var seenIndex = seen.length; + while (seenIndex--) { + if (seen[seenIndex] === computed) { + continue outer; + } + } + if (iteratee) { + seen.push(computed); } + result.push(value); } - } else { - callback = createCallback(callback, thisArg); - forIn(object, function(value, key, object) { - if (callback(value, key, object)) { - result[key] = value; + else if (indexOf(seen, computed, 0) < 0) { + if (iteratee || isLarge) { + seen.push(computed); } - }); + result.push(value); + } } return result; } /** - * Creates an array composed of the own enumerable property values of `object`. - * - * @static - * @memberOf _ - * @category Objects - * @param {Object} object The object to inspect. - * @returns {Array} Returns a new array of property values. - * @example - * - * _.values({ 'one': 1, 'two': 2, 'three': 3 }); - * // => [1, 2, 3] - */ - function values(object) { - var result = []; - forOwn(object, function(value) { - result.push(value); - }); - return result; - } - - /*--------------------------------------------------------------------------*/ - - /** - * Checks if a given `target` element is present in a `collection` using strict - * equality for comparisons, i.e. `===`. If `fromIndex` is negative, it is used - * as the offset from the end of the collection. - * - * @static - * @memberOf _ - * @alias include - * @category Collections - * @param {Array|Object|String} collection The collection to iterate over. - * @param {Mixed} target The value to check for. - * @param {Number} [fromIndex=0] The index to search from. - * @returns {Boolean} Returns `true` if the `target` element is found, else `false`. - * @example - * - * _.contains([1, 2, 3], 1); - * // => true + * The base implementation of `_.values` and `_.valuesIn` which creates an + * array of `object` property values corresponding to the property names + * of `props`. * - * _.contains([1, 2, 3], 1, 2); - * // => false - * - * _.contains({ 'name': 'moe', 'age': 40 }, 'moe'); - * // => true - * - * _.contains('curly', 'ur'); - * // => true + * @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 contains(collection, target, fromIndex) { + function baseValues(object, props) { var index = -1, - length = collection ? collection.length : 0, - result = false; - - fromIndex = (fromIndex < 0 ? nativeMax(0, length + fromIndex) : fromIndex) || 0; - if (typeof length == 'number') { - result = (isString(collection) - ? collection.indexOf(target, fromIndex) - : indexOf(collection, target, fromIndex) - ) > -1; - } else { - each(collection, function(value) { - if (++index >= fromIndex) { - return !(result = value === target); - } - }); + length = props.length, + result = Array(length); + + while (++index < length) { + result[index] = object[props[index]]; } return result; } /** - * Creates an object composed of keys returned from running each element of - * `collection` through a `callback`. The corresponding value of each key is - * the number of times the key was returned by `callback`. The `callback` is - * bound to `thisArg` and invoked with three arguments; (value, index|key, collection). - * The `callback` argument may also be the name of a property to count by (e.g. 'length'). - * - * @static - * @memberOf _ - * @category Collections - * @param {Array|Object|String} collection The collection to iterate over. - * @param {Function|String} callback|property The function called per iteration - * or property name to count by. - * @param {Mixed} [thisArg] The `this` binding of `callback`. - * @returns {Object} Returns the composed aggregate object. - * @example - * - * _.countBy([4.3, 6.1, 6.4], function(num) { return Math.floor(num); }); - * // => { '4': 1, '6': 2 } + * 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. * - * _.countBy([4.3, 6.1, 6.4], function(num) { return this.floor(num); }, Math); - * // => { '4': 1, '6': 2 } - * - * _.countBy(['one', 'two', 'three'], 'length'); - * // => { '3': 2, '5': 1 } + * @private + * @param {*} value The unwrapped value. + * @param {Array} actions Actions to peform to resolve the unwrapped value. + * @returns {*} Returns the resolved value. */ - function countBy(collection, callback, thisArg) { - var result = {}; - callback = createCallback(callback, thisArg); + function baseWrapperValue(value, actions) { + var result = value; + if (result instanceof LazyWrapper) { + result = result.value(); + } + var index = -1, + length = actions.length; - forEach(collection, function(value, key, collection) { - key = callback(value, key, collection); - (hasOwnProperty.call(result, key) ? result[key]++ : result[key] = 1); - }); + while (++index < length) { + var args = [result], + action = actions[index]; + + push.apply(args, action.args); + result = action.func.apply(action.thisArg, args); + } return result; } /** - * Checks if the `callback` returns a truthy value for **all** elements of a - * `collection`. The `callback` is bound to `thisArg` and invoked with three - * arguments; (value, index|key, collection). - * - * @static - * @memberOf _ - * @alias all - * @category Collections - * @param {Array|Object|String} collection The collection to iterate over. - * @param {Function} [callback=identity] The function called per iteration. - * @param {Mixed} [thisArg] The `this` binding of `callback`. - * @returns {Boolean} Returns `true` if all elements pass the callback check, - * else `false`. - * @example + * 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. * - * _.every([true, 1, null, 'yes'], Boolean); - * // => false + * @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 every(collection, callback, thisArg) { - var result = true; - callback = createCallback(callback, thisArg); + function binaryIndex(array, value, retHighest) { + var low = 0, + high = array ? array.length : low; - if (isArray(collection)) { - var index = -1, - length = collection.length; + if (typeof value == 'number' && value === value && high <= HALF_MAX_ARRAY_LENGTH) { + while (low < high) { + var mid = (low + high) >>> 1, + computed = array[mid]; - while (++index < length) { - if (!(result = !!callback(collection[index], index, collection))) { - break; + if ((retHighest ? (computed <= value) : (computed < value)) && computed !== null) { + low = mid + 1; + } else { + high = mid; } } - } else { - each(collection, function(value, index, collection) { - return (result = !!callback(value, index, collection)); - }); + return high; } - return result; + return binaryIndexBy(array, value, identity, retHighest); } /** - * Examines each element in a `collection`, returning an array of all elements - * the `callback` returns truthy for. The `callback` is bound to `thisArg` and - * invoked with three arguments; (value, index|key, collection). - * - * @static - * @memberOf _ - * @alias select - * @category Collections - * @param {Array|Object|String} collection The collection to iterate over. - * @param {Function} [callback=identity] The function called per iteration. - * @param {Mixed} [thisArg] The `this` binding of `callback`. - * @returns {Array} Returns a new array of elements that passed the callback check. - * @example + * This function is like `binaryIndex` except that it invokes `iteratee` for + * `value` and each element of `array` to compute their sort ranking. The + * iteratee is invoked with one argument; (value). * - * var evens = _.filter([1, 2, 3, 4, 5, 6], function(num) { return num % 2 == 0; }); - * // => [2, 4, 6] + * @private + * @param {Array} array The sorted array to inspect. + * @param {*} value The value to evaluate. + * @param {Function} iteratee The function invoked per iteration. + * @param {boolean} [retHighest] Specify returning the highest qualified index. + * @returns {number} Returns the index at which `value` should be inserted + * into `array`. */ - function filter(collection, callback, thisArg) { - var result = []; - callback = createCallback(callback, thisArg); + function binaryIndexBy(array, value, iteratee, retHighest) { + value = iteratee(value); - if (isArray(collection)) { - var index = -1, - length = collection.length; + var low = 0, + high = array ? array.length : 0, + valIsNaN = value !== value, + valIsNull = value === null, + valIsUndef = value === undefined; - while (++index < length) { - var value = collection[index]; - if (callback(value, index, collection)) { - result.push(value); - } + while (low < high) { + var mid = floor((low + high) / 2), + computed = iteratee(array[mid]), + isDef = computed !== undefined, + isReflexive = computed === computed; + + if (valIsNaN) { + var setLow = isReflexive || retHighest; + } else if (valIsNull) { + setLow = isReflexive && isDef && (retHighest || computed != null); + } else if (valIsUndef) { + setLow = isReflexive && (retHighest || isDef); + } else if (computed == null) { + setLow = false; + } else { + setLow = retHighest ? (computed <= value) : (computed < value); + } + if (setLow) { + low = mid + 1; + } else { + high = mid; } - } else { - each(collection, function(value, index, collection) { - if (callback(value, index, collection)) { - result.push(value); - } - }); } - return result; + return nativeMin(high, MAX_ARRAY_INDEX); } /** - * Examines each element in a `collection`, returning the first one the `callback` - * returns truthy for. The function returns as soon as it finds an acceptable - * element, and does not iterate over the entire `collection`. The `callback` is - * bound to `thisArg` and invoked with three arguments; (value, index|key, collection). - * - * @static - * @memberOf _ - * @alias detect - * @category Collections - * @param {Array|Object|String} collection The collection to iterate over. - * @param {Function} [callback=identity] The function called per iteration. - * @param {Mixed} [thisArg] The `this` binding of `callback`. - * @returns {Mixed} Returns the element that passed the callback check, - * else `undefined`. - * @example + * A specialized version of `baseCallback` which only supports `this` binding + * and specifying the number of arguments to provide to `func`. * - * var even = _.find([1, 2, 3, 4, 5, 6], function(num) { return num % 2 == 0; }); - * // => 2 + * @private + * @param {Function} func The function to bind. + * @param {*} thisArg The `this` binding of `func`. + * @param {number} [argCount] The number of arguments to provide to `func`. + * @returns {Function} Returns the callback. */ - function find(collection, callback, thisArg) { - var result; - callback = createCallback(callback, thisArg); - - forEach(collection, function(value, index, collection) { - if (callback(value, index, collection)) { - result = value; - return false; - } - }); - return result; + function bindCallback(func, thisArg, argCount) { + if (typeof func != 'function') { + return identity; + } + if (thisArg === undefined) { + return func; + } + switch (argCount) { + case 1: return function(value) { + return func.call(thisArg, value); + }; + case 3: return function(value, index, collection) { + return func.call(thisArg, value, index, collection); + }; + case 4: return function(accumulator, value, index, collection) { + return func.call(thisArg, accumulator, value, index, collection); + }; + case 5: return function(value, other, key, object, source) { + return func.call(thisArg, value, other, key, object, source); + }; + } + return function() { + return func.apply(thisArg, arguments); + }; } /** - * Iterates over a `collection`, executing the `callback` for each element in - * the `collection`. The `callback` is bound to `thisArg` and invoked with three - * arguments; (value, index|key, collection). Callbacks may exit iteration early - * by explicitly returning `false`. - * - * @static - * @memberOf _ - * @alias each - * @category Collections - * @param {Array|Object|String} collection The collection to iterate over. - * @param {Function} [callback=identity] The function called per iteration. - * @param {Mixed} [thisArg] The `this` binding of `callback`. - * @returns {Array|Object|String} Returns `collection`. - * @example + * Creates a clone of the given array buffer. * - * _([1, 2, 3]).forEach(alert).join(','); - * // => alerts each number and returns '1,2,3' - * - * _.forEach({ 'one': 1, 'two': 2, 'three': 3 }, alert); - * // => alerts each number value (order is not guaranteed) + * @private + * @param {ArrayBuffer} buffer The array buffer to clone. + * @returns {ArrayBuffer} Returns the cloned array buffer. */ - function forEach(collection, callback, thisArg) { - if (callback && typeof thisArg == 'undefined' && isArray(collection)) { - var index = -1, - length = collection.length; - - while (++index < length) { - if (callback(collection[index], index, collection) === false) { - break; - } + function bufferClone(buffer) { + return bufferSlice.call(buffer, 0); + } + if (!bufferSlice) { + // PhantomJS has `ArrayBuffer` and `Uint8Array` but not `Float64Array`. + bufferClone = !(ArrayBuffer && Uint8Array) ? constant(null) : function(buffer) { + var byteLength = buffer.byteLength, + floatLength = Float64Array ? floor(byteLength / FLOAT64_BYTES_PER_ELEMENT) : 0, + offset = floatLength * FLOAT64_BYTES_PER_ELEMENT, + result = new ArrayBuffer(byteLength); + + if (floatLength) { + var view = new Float64Array(result, 0, floatLength); + view.set(new Float64Array(buffer, 0, floatLength)); } - } else { - each(collection, callback, thisArg); - } - return collection; + if (byteLength != offset) { + view = new Uint8Array(result, offset); + view.set(new Uint8Array(buffer, offset)); + } + return result; + }; } /** - * Creates an object composed of keys returned from running each element of - * `collection` through a `callback`. The corresponding value of each key is an - * array of elements passed to `callback` that returned the key. The `callback` - * is bound to `thisArg` and invoked with three arguments; (value, index|key, collection). - * The `callback` argument may also be the name of a property to group by (e.g. 'length'). - * - * @static - * @memberOf _ - * @category Collections - * @param {Array|Object|String} collection The collection to iterate over. - * @param {Function|String} callback|property The function called per iteration - * or property name to group by. - * @param {Mixed} [thisArg] The `this` binding of `callback`. - * @returns {Object} Returns the composed aggregate object. - * @example - * - * _.groupBy([4.2, 6.1, 6.4], function(num) { return Math.floor(num); }); - * // => { '4': [4.2], '6': [6.1, 6.4] } - * - * _.groupBy([4.2, 6.1, 6.4], function(num) { return this.floor(num); }, Math); - * // => { '4': [4.2], '6': [6.1, 6.4] } + * Creates an array that is the composition of partially applied arguments, + * placeholders, and provided arguments into a single array of arguments. * - * _.groupBy(['one', 'two', 'three'], 'length'); - * // => { '3': ['one', 'two'], '5': ['three'] } + * @private + * @param {Array|Object} args The provided arguments. + * @param {Array} partials The arguments to prepend to those provided. + * @param {Array} holders The `partials` placeholder indexes. + * @returns {Array} Returns the new array of composed arguments. */ - function groupBy(collection, callback, thisArg) { - var result = {}; - callback = createCallback(callback, thisArg); + function composeArgs(args, partials, holders) { + var holdersLength = holders.length, + argsIndex = -1, + argsLength = nativeMax(args.length - holdersLength, 0), + leftIndex = -1, + leftLength = partials.length, + result = Array(argsLength + leftLength); - forEach(collection, function(value, key, collection) { - key = callback(value, key, collection); - (hasOwnProperty.call(result, key) ? result[key] : result[key] = []).push(value); - }); + while (++leftIndex < leftLength) { + result[leftIndex] = partials[leftIndex]; + } + while (++argsIndex < holdersLength) { + result[holders[argsIndex]] = args[argsIndex]; + } + while (argsLength--) { + result[leftIndex++] = args[argsIndex++]; + } return result; } /** - * Invokes the method named by `methodName` on each element in the `collection`, - * returning an array of the results of each invoked method. Additional arguments - * will be passed to each invoked method. If `methodName` is a function it will - * be invoked for, and `this` bound to, each element in the `collection`. - * - * @static - * @memberOf _ - * @category Collections - * @param {Array|Object|String} collection The collection to iterate over. - * @param {Function|String} methodName The name of the method to invoke or - * the function invoked per iteration. - * @param {Mixed} [arg1, arg2, ...] Arguments to invoke the method with. - * @returns {Array} Returns a new array of the results of each invoked method. - * @example - * - * _.invoke([[5, 1, 7], [3, 2, 1]], 'sort'); - * // => [[1, 5, 7], [1, 2, 3]] + * This function is like `composeArgs` except that the arguments composition + * is tailored for `_.partialRight`. * - * _.invoke([123, 456], String.prototype.split, ''); - * // => [['1', '2', '3'], ['4', '5', '6']] + * @private + * @param {Array|Object} args The provided arguments. + * @param {Array} partials The arguments to append to those provided. + * @param {Array} holders The `partials` placeholder indexes. + * @returns {Array} Returns the new array of composed arguments. */ - function invoke(collection, methodName) { - var args = slice(arguments, 2), - isFunc = typeof methodName == 'function', - result = []; + function composeArgsRight(args, partials, holders) { + var holdersIndex = -1, + holdersLength = holders.length, + argsIndex = -1, + argsLength = nativeMax(args.length - holdersLength, 0), + rightIndex = -1, + rightLength = partials.length, + result = Array(argsLength + rightLength); - forEach(collection, function(value) { - result.push((isFunc ? methodName : value[methodName]).apply(value, args)); - }); + while (++argsIndex < argsLength) { + result[argsIndex] = args[argsIndex]; + } + var offset = argsIndex; + while (++rightIndex < rightLength) { + result[offset + rightIndex] = partials[rightIndex]; + } + while (++holdersIndex < holdersLength) { + result[offset + holders[holdersIndex]] = args[argsIndex++]; + } return result; } /** - * Creates an array of values by running each element in the `collection` - * through a `callback`. The `callback` is bound to `thisArg` and invoked with - * three arguments; (value, index|key, collection). - * - * @static - * @memberOf _ - * @alias collect - * @category Collections - * @param {Array|Object|String} collection The collection to iterate over. - * @param {Function} [callback=identity] The function called per iteration. - * @param {Mixed} [thisArg] The `this` binding of `callback`. - * @returns {Array} Returns a new array of the results of each `callback` execution. - * @example + * Creates a function that aggregates a collection, creating an accumulator + * object composed from the results of running each element in the collection + * through an iteratee. * - * _.map([1, 2, 3], function(num) { return num * 3; }); - * // => [3, 6, 9] + * **Note:** This function is used to create `_.countBy`, `_.groupBy`, `_.indexBy`, + * and `_.partition`. * - * _.map({ 'one': 1, 'two': 2, 'three': 3 }, function(num) { return num * 3; }); - * // => [3, 6, 9] (order is not guaranteed) + * @private + * @param {Function} setter The function to set keys and values of the accumulator object. + * @param {Function} [initializer] The function to initialize the accumulator object. + * @returns {Function} Returns the new aggregator function. */ - function map(collection, callback, thisArg) { - var index = -1, - length = collection ? collection.length : 0, - result = Array(typeof length == 'number' ? length : 0); + function createAggregator(setter, initializer) { + return function(collection, iteratee, thisArg) { + var result = initializer ? initializer() : {}; + iteratee = getCallback(iteratee, thisArg, 3); - callback = createCallback(callback, thisArg); - if (isArray(collection)) { - while (++index < length) { - result[index] = callback(collection[index], index, collection); + if (isArray(collection)) { + var index = -1, + length = collection.length; + + while (++index < length) { + var value = collection[index]; + setter(result, value, iteratee(value, index, collection), collection); + } + } else { + baseEach(collection, function(value, key, collection) { + setter(result, value, iteratee(value, key, collection), collection); + }); } - } else { - each(collection, function(value, key, collection) { - result[++index] = callback(value, key, collection); - }); - } - return result; + return result; + }; } /** - * Retrieves the maximum value of an `array`. If `callback` is passed, - * it will be executed for each value in the `array` to generate the - * criterion by which the value is ranked. The `callback` is bound to - * `thisArg` and invoked with three arguments; (value, index, collection). - * - * @static - * @memberOf _ - * @category Collections - * @param {Array|Object|String} collection The collection to iterate over. - * @param {Function} [callback] The function called per iteration. - * @param {Mixed} [thisArg] The `this` binding of `callback`. - * @returns {Mixed} Returns the maximum value. - * @example + * Creates a function that assigns properties of source object(s) to a given + * destination object. * - * var stooges = [ - * { 'name': 'moe', 'age': 40 }, - * { 'name': 'larry', 'age': 50 }, - * { 'name': 'curly', 'age': 60 } - * ]; + * **Note:** This function is used to create `_.assign`, `_.defaults`, and `_.merge`. * - * _.max(stooges, function(stooge) { return stooge.age; }); - * // => { 'name': 'curly', 'age': 60 }; + * @private + * @param {Function} assigner The function to assign values. + * @returns {Function} Returns the new assigner function. */ - function max(collection, callback, thisArg) { - var computed = -Infinity, - index = -1, - length = collection ? collection.length : 0, - result = computed; - - if (callback || !isArray(collection)) { - callback = !callback && isString(collection) - ? charAtCallback - : createCallback(callback, thisArg); - - each(collection, function(value, index, collection) { - var current = callback(value, index, collection); - if (current > computed) { - computed = current; - result = value; - } - }); - } else { + function createAssigner(assigner) { + return restParam(function(object, sources) { + var index = -1, + length = object == null ? 0 : sources.length, + customizer = length > 2 ? sources[length - 2] : undefined, + guard = length > 2 ? sources[2] : undefined, + thisArg = length > 1 ? sources[length - 1] : undefined; + + if (typeof customizer == 'function') { + customizer = bindCallback(customizer, thisArg, 5); + length -= 2; + } else { + customizer = typeof thisArg == 'function' ? thisArg : undefined; + length -= (customizer ? 1 : 0); + } + if (guard && isIterateeCall(sources[0], sources[1], guard)) { + customizer = length < 3 ? undefined : customizer; + length = 1; + } while (++index < length) { - if (collection[index] > result) { - result = collection[index]; + var source = sources[index]; + if (source) { + assigner(object, source, customizer); } } - } - return result; + return object; + }); } /** - * Retrieves the minimum value of an `array`. If `callback` is passed, - * it will be executed for each value in the `array` to generate the - * criterion by which the value is ranked. The `callback` is bound to `thisArg` - * and invoked with three arguments; (value, index, collection). - * - * @static - * @memberOf _ - * @category Collections - * @param {Array|Object|String} collection The collection to iterate over. - * @param {Function} [callback] The function called per iteration. - * @param {Mixed} [thisArg] The `this` binding of `callback`. - * @returns {Mixed} Returns the minimum value. - * @example + * Creates a `baseEach` or `baseEachRight` function. * - * _.min([10, 5, 100, 2, 1000]); - * // => 2 + * @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 min(collection, callback, thisArg) { - var computed = Infinity, - index = -1, - length = collection ? collection.length : 0, - result = computed; - - if (callback || !isArray(collection)) { - callback = !callback && isString(collection) - ? charAtCallback - : createCallback(callback, thisArg); + function createBaseEach(eachFunc, fromRight) { + return function(collection, iteratee) { + var length = collection ? getLength(collection) : 0; + if (!isLength(length)) { + return eachFunc(collection, iteratee); + } + var index = fromRight ? length : -1, + iterable = toObject(collection); - each(collection, function(value, index, collection) { - var current = callback(value, index, collection); - if (current < computed) { - computed = current; - result = value; + while ((fromRight ? index-- : ++index < length)) { + if (iteratee(iterable[index], index, iterable) === false) { + break; } - }); - } else { - while (++index < length) { - if (collection[index] < result) { - result = collection[index]; + } + return collection; + }; + } + + /** + * Creates a base function for `_.forIn` or `_.forInRight`. + * + * @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 iterable = toObject(object), + props = keysFunc(object), + length = props.length, + index = fromRight ? length : -1; + + while ((fromRight ? index-- : ++index < length)) { + var key = props[index]; + if (iteratee(iterable[key], key, iterable) === false) { + break; } } + return object; + }; + } + + /** + * Creates a function that wraps `func` and invokes it with the `this` + * binding of `thisArg`. + * + * @private + * @param {Function} func The function to bind. + * @param {*} [thisArg] The `this` binding of `func`. + * @returns {Function} Returns the new bound function. + */ + function createBindWrapper(func, thisArg) { + var Ctor = createCtorWrapper(func); + + function wrapper() { + var fn = (this && this !== root && this instanceof wrapper) ? Ctor : func; + return fn.apply(thisArg, arguments); } - return result; + return wrapper; } /** - * Retrieves the value of a specified property from all elements in - * the `collection`. + * Creates a `Set` cache object to optimize linear searches of large arrays. * - * @static - * @memberOf _ - * @category Collections - * @param {Array|Object|String} collection The collection to iterate over. - * @param {String} property The property to pluck. - * @returns {Array} Returns a new array of property values. - * @example + * @private + * @param {Array} [values] The values to cache. + * @returns {null|Object} Returns the new cache object if `Set` is supported, else `null`. + */ + var createCache = !(nativeCreate && Set) ? constant(null) : function(values) { + return new SetCache(values); + }; + + /** + * 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`. * - * var stooges = [ - * { 'name': 'moe', 'age': 40 }, - * { 'name': 'larry', 'age': 50 }, - * { 'name': 'curly', 'age': 60 } - * ]; + * @private + * @param {Function} Ctor The constructor to wrap. + * @returns {Function} Returns the new wrapped function. + */ + function createCtorWrapper(Ctor) { + return function() { + // Use a `switch` statement to work with class constructors. + // See https://people.mozilla.org/~jorendorff/es6-draft.html#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]); + } + 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; + }; + } + + /** + * Creates a `_.find` or `_.findLast` function. * - * _.pluck(stooges, 'name'); - * // => ['moe', 'larry', 'curly'] + * @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 find function. */ - function pluck(collection, property) { - return map(collection, property + ''); + function createFind(eachFunc, fromRight) { + return function(collection, predicate, thisArg) { + predicate = getCallback(predicate, thisArg, 3); + if (isArray(collection)) { + var index = baseFindIndex(collection, predicate, fromRight); + return index > -1 ? collection[index] : undefined; + } + return baseFind(collection, predicate, eachFunc); + }; } /** - * Boils down a `collection` to a single value. The initial state of the - * reduction is `accumulator` and each successive step of it should be returned - * by the `callback`. The `callback` is bound to `thisArg` and invoked with 4 - * arguments; for arrays they are (accumulator, value, index|key, collection). + * Creates a function for `_.forEach` or `_.forEachRight`. * - * @static - * @memberOf _ - * @alias foldl, inject - * @category Collections - * @param {Array|Object|String} collection The collection to iterate over. - * @param {Function} [callback=identity] The function called per iteration. - * @param {Mixed} [accumulator] Initial value of the accumulator. - * @param {Mixed} [thisArg] The `this` binding of `callback`. - * @returns {Mixed} Returns the accumulated value. - * @example + * @private + * @param {Function} arrayFunc The function to iterate over an array. + * @param {Function} eachFunc The function to iterate over a collection. + * @returns {Function} Returns the new each function. + */ + function createForEach(arrayFunc, eachFunc) { + return function(collection, iteratee, thisArg) { + return (typeof iteratee == 'function' && thisArg === undefined && isArray(collection)) + ? arrayFunc(collection, iteratee) + : eachFunc(collection, bindCallback(iteratee, thisArg, 3)); + }; + } + + /** + * Creates a function for `_.forOwn` or `_.forOwnRight`. * - * var sum = _.reduce([1, 2, 3], function(memo, num) { return memo + num; }); - * // => 6 + * @private + * @param {Function} objectFunc The function to iterate over an object. + * @returns {Function} Returns the new each function. */ - function reduce(collection, callback, accumulator, thisArg) { - var noaccum = arguments.length < 3; - callback = createCallback(callback, thisArg, indicatorObject); + function createForOwn(objectFunc) { + return function(object, iteratee, thisArg) { + if (typeof iteratee != 'function' || thisArg !== undefined) { + iteratee = bindCallback(iteratee, thisArg, 3); + } + return objectFunc(object, iteratee); + }; + } - if (isArray(collection)) { - var index = -1, - length = collection.length; + /** + * Creates a function for `_.reduce` or `_.reduceRight`. + * + * @private + * @param {Function} arrayFunc The function to iterate over an array. + * @param {Function} eachFunc The function to iterate over a collection. + * @returns {Function} Returns the new each function. + */ + function createReduce(arrayFunc, eachFunc) { + return function(collection, iteratee, accumulator, thisArg) { + var initFromArray = arguments.length < 3; + return (typeof iteratee == 'function' && thisArg === undefined && isArray(collection)) + ? arrayFunc(collection, iteratee, accumulator, initFromArray) + : baseReduce(collection, getCallback(iteratee, thisArg, 4), accumulator, initFromArray, eachFunc); + }; + } - if (noaccum) { - accumulator = collection[++index]; + /** + * Creates a function that wraps `func` and invokes it with optional `this` + * binding of, partial application, and currying. + * + * @private + * @param {Function|string} func The function or method name to reference. + * @param {number} bitmask The bitmask of flags. See `createWrapper` 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 createHybridWrapper(func, bitmask, thisArg, partials, holders, partialsRight, holdersRight, argPos, ary, arity) { + var isAry = bitmask & ARY_FLAG, + isBind = bitmask & BIND_FLAG, + isBindKey = bitmask & BIND_KEY_FLAG, + isCurry = bitmask & CURRY_FLAG, + isCurryBound = bitmask & CURRY_BOUND_FLAG, + isCurryRight = bitmask & CURRY_RIGHT_FLAG, + Ctor = isBindKey ? null : createCtorWrapper(func); + + function wrapper() { + // Avoid `arguments` object use disqualifying optimizations by + // converting it to an array before providing it to other functions. + var length = arguments.length, + index = length, + args = Array(length); + + while (index--) { + args[index] = arguments[index]; } - while (++index < length) { - accumulator = callback(accumulator, collection[index], index, collection); + if (partials) { + args = composeArgs(args, partials, holders); } - } else { - each(collection, function(value, index, collection) { - accumulator = noaccum - ? (noaccum = false, value) - : callback(accumulator, value, index, collection) - }); + if (partialsRight) { + args = composeArgsRight(args, partialsRight, holdersRight); + } + if (isCurry || isCurryRight) { + var placeholder = wrapper.placeholder, + argsHolders = replaceHolders(args, placeholder); + + length -= argsHolders.length; + if (length < arity) { + var newArgPos = argPos ? arrayCopy(argPos) : null, + newArity = nativeMax(arity - length, 0), + newsHolders = isCurry ? argsHolders : null, + newHoldersRight = isCurry ? null : argsHolders, + newPartials = isCurry ? args : null, + newPartialsRight = isCurry ? null : args; + + bitmask |= (isCurry ? PARTIAL_FLAG : PARTIAL_RIGHT_FLAG); + bitmask &= ~(isCurry ? PARTIAL_RIGHT_FLAG : PARTIAL_FLAG); + + if (!isCurryBound) { + bitmask &= ~(BIND_FLAG | BIND_KEY_FLAG); + } + var newData = [func, bitmask, thisArg, newPartials, newsHolders, newPartialsRight, newHoldersRight, newArgPos, ary, newArity], + result = createHybridWrapper.apply(undefined, newData); + + if (isLaziable(func)) { + setData(result, newData); + } + result.placeholder = placeholder; + return result; + } + } + var thisBinding = isBind ? thisArg : this, + fn = isBindKey ? thisBinding[func] : func; + + if (argPos) { + args = reorder(args, argPos); + } + if (isAry && ary < args.length) { + args.length = ary; + } + if (this && this !== root && this instanceof wrapper) { + fn = Ctor || createCtorWrapper(func); + } + return fn.apply(thisBinding, args); } - return accumulator; + return wrapper; } /** - * The right-associative version of `_.reduce`. - * - * @static - * @memberOf _ - * @alias foldr - * @category Collections - * @param {Array|Object|String} collection The collection to iterate over. - * @param {Function} [callback=identity] The function called per iteration. - * @param {Mixed} [accumulator] Initial value of the accumulator. - * @param {Mixed} [thisArg] The `this` binding of `callback`. - * @returns {Mixed} Returns the accumulated value. - * @example + * Creates a function that wraps `func` and invokes it with the optional `this` + * binding of `thisArg` and the `partials` prepended to those provided to + * the wrapper. * - * var list = [[0, 1], [2, 3], [4, 5]]; - * var flat = _.reduceRight(list, function(a, b) { return a.concat(b); }, []); - * // => [4, 5, 2, 3, 0, 1] + * @private + * @param {Function} func The function to partially apply arguments to. + * @param {number} bitmask The bitmask of flags. See `createWrapper` 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 bound function. */ - function reduceRight(collection, callback, accumulator, thisArg) { - var iteratee = collection, - length = collection ? collection.length : 0, - noaccum = arguments.length < 3; - - if (typeof length != 'number') { - var props = keys(collection); - length = props.length; - } else if (noCharByIndex && isString(collection)) { - iteratee = collection.split(''); - } - callback = createCallback(callback, thisArg, indicatorObject); - forEach(collection, function(value, index, collection) { - index = props ? props[--length] : --length; - accumulator = noaccum - ? (noaccum = false, iteratee[index]) - : callback(accumulator, iteratee[index], index, collection); - }); - return accumulator; + function createPartialWrapper(func, bitmask, thisArg, partials) { + var isBind = bitmask & BIND_FLAG, + Ctor = createCtorWrapper(func); + + function wrapper() { + // Avoid `arguments` object use disqualifying optimizations by + // converting it to an array before providing it `func`. + var argsIndex = -1, + argsLength = arguments.length, + leftIndex = -1, + leftLength = partials.length, + args = Array(argsLength + leftLength); + + while (++leftIndex < leftLength) { + args[leftIndex] = partials[leftIndex]; + } + while (argsLength--) { + args[leftIndex++] = arguments[++argsIndex]; + } + var fn = (this && this !== root && this instanceof wrapper) ? Ctor : func; + return fn.apply(isBind ? thisArg : this, args); + } + return wrapper; } /** - * The opposite of `_.filter`, this method returns the values of a - * `collection` that `callback` does **not** return truthy for. - * - * @static - * @memberOf _ - * @category Collections - * @param {Array|Object|String} collection The collection to iterate over. - * @param {Function} [callback=identity] The function called per iteration. - * @param {Mixed} [thisArg] The `this` binding of `callback`. - * @returns {Array} Returns a new array of elements that did **not** pass the - * callback check. - * @example + * Creates a function that either curries or invokes `func` with optional + * `this` binding and partially applied arguments. * - * var odds = _.reject([1, 2, 3, 4, 5, 6], function(num) { return num % 2 == 0; }); - * // => [1, 3, 5] + * @private + * @param {Function|string} func The function or method name to reference. + * @param {number} bitmask The bitmask of flags. + * The bitmask may be composed of the following 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` + * @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 reject(collection, callback, thisArg) { - callback = createCallback(callback, thisArg); - return filter(collection, function(value, index, collection) { - return !callback(value, index, collection); - }); + function createWrapper(func, bitmask, thisArg, partials, holders, argPos, ary, arity) { + var isBindKey = bitmask & BIND_KEY_FLAG; + if (!isBindKey && typeof func != 'function') { + throw new TypeError(FUNC_ERROR_TEXT); + } + var length = partials ? partials.length : 0; + if (!length) { + bitmask &= ~(PARTIAL_FLAG | PARTIAL_RIGHT_FLAG); + partials = holders = null; + } + length -= (holders ? holders.length : 0); + if (bitmask & PARTIAL_RIGHT_FLAG) { + var partialsRight = partials, + holdersRight = holders; + + partials = holders = null; + } + var data = isBindKey ? null : getData(func), + newData = [func, bitmask, thisArg, partials, holders, partialsRight, holdersRight, argPos, ary, arity]; + + if (data) { + mergeData(newData, data); + bitmask = newData[1]; + arity = newData[9]; + } + newData[9] = arity == null + ? (isBindKey ? 0 : func.length) + : (nativeMax(arity - length, 0) || 0); + + if (bitmask == BIND_FLAG) { + var result = createBindWrapper(newData[0], newData[2]); + } else if ((bitmask == PARTIAL_FLAG || bitmask == (BIND_FLAG | PARTIAL_FLAG)) && !newData[4].length) { + result = createPartialWrapper.apply(undefined, newData); + } else { + result = createHybridWrapper.apply(undefined, newData); + } + var setter = data ? baseSetData : setData; + return setter(result, newData); } /** - * Creates an array of shuffled `array` values, using a version of the - * Fisher-Yates shuffle. See http://en.wikipedia.org/wiki/Fisher-Yates_shuffle. + * A specialized version of `baseIsEqualDeep` for arrays with support for + * partial deep comparisons. * - * @static - * @memberOf _ - * @category Collections - * @param {Array|Object|String} collection The collection to shuffle. - * @returns {Array} Returns a new shuffled collection. - * @example - * - * _.shuffle([1, 2, 3, 4, 5, 6]); - * // => [4, 1, 6, 3, 5, 2] + * @private + * @param {Array} array The array to compare. + * @param {Array} other The other array to compare. + * @param {Function} equalFunc The function to determine equivalents of values. + * @param {Function} [customizer] The function to customize comparing arrays. + * @param {boolean} [isLoose] Specify performing partial comparisons. + * @param {Array} [stackA] Tracks traversed `value` objects. + * @param {Array} [stackB] Tracks traversed `other` objects. + * @returns {boolean} Returns `true` if the arrays are equivalent, else `false`. */ - function shuffle(collection) { + function equalArrays(array, other, equalFunc, customizer, isLoose, stackA, stackB) { var index = -1, - result = Array(collection ? collection.length : 0); + arrLength = array.length, + othLength = other.length; - forEach(collection, function(value) { - var rand = floor(nativeRandom() * (++index + 1)); - result[index] = result[rand]; - result[rand] = value; - }); - return result; + if (arrLength != othLength && !(isLoose && othLength > arrLength)) { + return false; + } + // Ignore non-index properties. + while (++index < arrLength) { + var arrValue = array[index], + othValue = other[index], + result = customizer ? customizer(isLoose ? othValue : arrValue, isLoose ? arrValue : othValue, index) : undefined; + + if (result !== undefined) { + if (result) { + continue; + } + return false; + } + // Recursively compare arrays (susceptible to call stack limits). + if (isLoose) { + if (!arraySome(other, function(othValue) { + return arrValue === othValue || equalFunc(arrValue, othValue, customizer, isLoose, stackA, stackB); + })) { + return false; + } + } else if (!(arrValue === othValue || equalFunc(arrValue, othValue, customizer, isLoose, stackA, stackB))) { + return false; + } + } + return true; } /** - * Gets the size of the `collection` by returning `collection.length` for arrays - * and array-like objects or the number of own enumerable properties for objects. - * - * @static - * @memberOf _ - * @category Collections - * @param {Array|Object|String} collection The collection to inspect. - * @returns {Number} Returns `collection.length` or number of own enumerable properties. - * @example - * - * _.size([1, 2]); - * // => 2 + * A specialized version of `baseIsEqualDeep` for comparing objects of + * the same `toStringTag`. * - * _.size({ 'one': 1, 'two': 2, 'three': 3 }); - * // => 3 + * **Note:** This function only supports comparing values with tags of + * `Boolean`, `Date`, `Error`, `Number`, `RegExp`, or `String`. * - * _.size('curly'); - * // => 5 + * @private + * @param {Object} value The object to compare. + * @param {Object} other The other object to compare. + * @param {string} tag The `toStringTag` of the objects to compare. + * @returns {boolean} Returns `true` if the objects are equivalent, else `false`. */ - function size(collection) { - var length = collection ? collection.length : 0; - return typeof length == 'number' ? length : keys(collection).length; + function equalByTag(object, other, tag) { + switch (tag) { + case boolTag: + case dateTag: + // Coerce dates and booleans to numbers, dates to milliseconds and booleans + // to `1` or `0` treating invalid dates coerced to `NaN` as not equal. + return +object == +other; + + case errorTag: + return object.name == other.name && object.message == other.message; + + case numberTag: + // Treat `NaN` vs. `NaN` as equal. + return (object != +object) + ? other != +other + : object == +other; + + case regexpTag: + case stringTag: + // Coerce regexes to strings and treat strings primitives and string + // objects as equal. See https://es5.github.io/#x15.10.6.4 for more details. + return object == (other + ''); + } + return false; } /** - * Checks if the `callback` returns a truthy value for **any** element of a - * `collection`. The function returns as soon as it finds passing value, and - * does not iterate over the entire `collection`. The `callback` is bound to - * `thisArg` and invoked with three arguments; (value, index|key, collection). - * - * @static - * @memberOf _ - * @alias any - * @category Collections - * @param {Array|Object|String} collection The collection to iterate over. - * @param {Function} [callback=identity] The function called per iteration. - * @param {Mixed} [thisArg] The `this` binding of `callback`. - * @returns {Boolean} Returns `true` if any element passes the callback check, - * else `false`. - * @example + * A specialized version of `baseIsEqualDeep` for objects with support for + * partial deep comparisons. * - * _.some([null, 0, 'yes', false], Boolean); - * // => true + * @private + * @param {Object} object The object to compare. + * @param {Object} other The other object to compare. + * @param {Function} equalFunc The function to determine equivalents of values. + * @param {Function} [customizer] The function to customize comparing values. + * @param {boolean} [isLoose] Specify performing partial comparisons. + * @param {Array} [stackA] Tracks traversed `value` objects. + * @param {Array} [stackB] Tracks traversed `other` objects. + * @returns {boolean} Returns `true` if the objects are equivalent, else `false`. */ - function some(collection, callback, thisArg) { - var result; - callback = createCallback(callback, thisArg); + function equalObjects(object, other, equalFunc, customizer, isLoose, stackA, stackB) { + var objProps = keys(object), + objLength = objProps.length, + othProps = keys(other), + othLength = othProps.length; - if (isArray(collection)) { - var index = -1, - length = collection.length; + if (objLength != othLength && !isLoose) { + return false; + } + var index = objLength; + while (index--) { + var key = objProps[index]; + if (!(isLoose ? key in other : hasOwnProperty.call(other, key))) { + return false; + } + } + var skipCtor = isLoose; + while (++index < objLength) { + key = objProps[index]; + var objValue = object[key], + othValue = other[key], + result = customizer ? customizer(isLoose ? othValue : objValue, isLoose? objValue : othValue, key) : undefined; - while (++index < length) { - if ((result = callback(collection[index], index, collection))) { - break; - } + // Recursively compare objects (susceptible to call stack limits). + if (!(result === undefined ? equalFunc(objValue, othValue, customizer, isLoose, stackA, stackB) : result)) { + return false; } - } else { - each(collection, function(value, index, collection) { - return !(result = callback(value, index, collection)); - }); + skipCtor || (skipCtor = key == 'constructor'); } - return !!result; + if (!skipCtor) { + var objCtor = object.constructor, + othCtor = other.constructor; + + // 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)) { + return false; + } + } + return true; } /** - * Creates an array, stable sorted in ascending order by the results of - * running each element of `collection` through a `callback`. The `callback` - * is bound to `thisArg` and invoked with three arguments; (value, index|key, collection). - * The `callback` argument may also be the name of a property to sort by (e.g. 'length'). - * - * @static - * @memberOf _ - * @category Collections - * @param {Array|Object|String} collection The collection to iterate over. - * @param {Function|String} callback|property The function called per iteration - * or property name to sort by. - * @param {Mixed} [thisArg] The `this` binding of `callback`. - * @returns {Array} Returns a new array of sorted elements. - * @example - * - * _.sortBy([1, 2, 3], function(num) { return Math.sin(num); }); - * // => [3, 1, 2] + * Gets the appropriate "callback" function. If the `_.callback` method is + * customized this function returns the custom method, otherwise it returns + * the `baseCallback` function. If arguments are provided the chosen function + * is invoked with them and its result is returned. * - * _.sortBy([1, 2, 3], function(num) { return this.sin(num); }, Math); - * // => [3, 1, 2] + * @private + * @returns {Function} Returns the chosen function or its result. + */ + function getCallback(func, thisArg, argCount) { + var result = lodash.callback || callback; + result = result === callback ? baseCallback : result; + return argCount ? result(func, thisArg, argCount) : result; + } + + /** + * Gets metadata for `func`. * - * _.sortBy(['larry', 'brendan', 'moe'], 'length'); - * // => ['moe', 'larry', 'brendan'] + * @private + * @param {Function} func The function to query. + * @returns {*} Returns the metadata for `func`. */ - function sortBy(collection, callback, thisArg) { - var result = []; - callback = createCallback(callback, thisArg); + var getData = !metaMap ? noop : function(func) { + return metaMap.get(func); + }; - forEach(collection, function(value, index, collection) { - result.push({ - 'criteria': callback(value, index, collection), - 'index': index, - 'value': value - }); - }); + /** + * 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 = array ? array.length : 0; - var length = result.length; - result.sort(compareAscending); while (length--) { - result[length] = result[length].value; + var data = array[length], + otherFunc = data.func; + if (otherFunc == null || otherFunc == func) { + return data.name; + } } return result; } /** - * Converts the `collection` to an array. - * - * @static - * @memberOf _ - * @category Collections - * @param {Array|Object|String} collection The collection to convert. - * @returns {Array} Returns the new converted array. - * @example + * Gets the appropriate "indexOf" function. If the `_.indexOf` method is + * customized this function returns the custom method, otherwise it returns + * the `baseIndexOf` function. If arguments are provided the chosen function + * is invoked with them and its result is returned. * - * (function() { return _.toArray(arguments).slice(1); })(1, 2, 3, 4); - * // => [2, 3, 4] + * @private + * @returns {Function|number} Returns the chosen function or its result. */ - function toArray(collection) { - var length = collection ? collection.length : 0; - if (typeof length == 'number') { - return noCharByIndex && isString(collection) - ? collection.split('') - : slice(collection); - } - return values(collection); + function getIndexOf(collection, target, fromIndex) { + var result = lodash.indexOf || indexOf; + result = result === indexOf ? baseIndexOf : result; + return collection ? result(collection, target, fromIndex) : result; } /** - * Examines each element in a `collection`, returning an array of all elements - * that contain the given `properties`. + * Gets the "length" property value of `object`. * - * @static - * @memberOf _ - * @category Collections - * @param {Array|Object|String} collection The collection to iterate over. - * @param {Object} properties The object of property values to filter by. - * @returns {Array} Returns a new array of elements that contain the given `properties`. - * @example + * **Note:** This function is used to avoid a [JIT bug](https://bugs.webkit.org/show_bug.cgi?id=142792) + * that affects Safari on at least iOS 8.1-8.3 ARM64. * - * var stooges = [ - * { 'name': 'moe', 'age': 40 }, - * { 'name': 'larry', 'age': 50 }, - * { 'name': 'curly', 'age': 60 } - * ]; + * @private + * @param {Object} object The object to query. + * @returns {*} Returns the "length" value. + */ + var getLength = baseProperty('length'); + + /** + * Gets the propery names, values, and compare flags of `object`. * - * _.where(stooges, { 'age': 40 }); - * // => [{ 'name': 'moe', 'age': 40 }] + * @private + * @param {Object} object The object to query. + * @returns {Array} Returns the match data of `object`. */ - function where(collection, properties) { - var props = keys(properties); - return filter(collection, function(object) { - var length = props.length; - while (length--) { - var result = object[props[length]] === properties[props[length]]; - if (!result) { - break; - } - } - return !!result; - }); - } + function getMatchData(object) { + var result = pairs(object), + length = result.length; - /*--------------------------------------------------------------------------*/ + while (length--) { + result[length][2] = isStrictComparable(result[length][1]); + } + return result; + } /** - * Creates an array with all falsey values of `array` removed. The values - * `false`, `null`, `0`, `""`, `undefined` and `NaN` are all falsey. + * Gets the native function at `key` of `object`. * - * @static - * @memberOf _ - * @category Arrays - * @param {Array} array The array to compact. - * @returns {Array} Returns a new filtered array. - * @example + * @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 = object == null ? undefined : object[key]; + return isNative(value) ? value : undefined; + } + + /** + * Gets the view, applying any `transforms` to the `start` and `end` positions. * - * _.compact([0, 1, false, 2, '', 3]); - * // => [1, 2, 3] + * @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 compact(array) { + function getView(start, end, transforms) { var index = -1, - length = array ? array.length : 0, - result = []; + length = transforms ? transforms.length : 0; while (++index < length) { - var value = array[index]; - if (value) { - result.push(value); + var data = transforms[index], + size = data.size; + + 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 result; + return { 'start': start, 'end': end }; } /** - * Creates an array of `array` elements not present in the other arrays - * using strict equality for comparisons, i.e. `===`. - * - * @static - * @memberOf _ - * @category Arrays - * @param {Array} array The array to process. - * @param {Array} [array1, array2, ...] Arrays to check. - * @returns {Array} Returns a new array of `array` elements not present in the - * other arrays. - * @example + * Initializes an array clone. * - * _.difference([1, 2, 3, 4, 5], [5, 2, 10]); - * // => [1, 3, 4] + * @private + * @param {Array} array The array to clone. + * @returns {Array} Returns the initialized clone. */ - function difference(array) { - var index = -1, - length = array ? array.length : 0, - flattened = concat.apply(arrayRef, arguments), - contains = cachedContains(flattened, length), - result = []; + function initCloneArray(array) { + var length = array.length, + result = new array.constructor(length); - while (++index < length) { - var value = array[index]; - if (!contains(value)) { - result.push(value); - } + // Add array 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; } /** - * Gets the first element of the `array`. Pass `n` to return the first `n` - * elements of the `array`. + * Initializes an object clone. * - * @static - * @memberOf _ - * @alias head, take - * @category Arrays - * @param {Array} array The array to query. - * @param {Number} [n] The number of elements to return. - * @param- {Object} [guard] Internally used to allow this method to work with - * others like `_.map` without using their callback `index` argument for `n`. - * @returns {Mixed} Returns the first element, or an array of the first `n` - * elements, of `array`. - * @example - * - * _.first([5, 4, 3, 2, 1]); - * // => 5 + * @private + * @param {Object} object The object to clone. + * @returns {Object} Returns the initialized clone. */ - function first(array, n, guard) { - if (array) { - var length = array.length; - return (n == null || guard) - ? array[0] - : slice(array, 0, nativeMin(nativeMax(0, n), length)); + function initCloneObject(object) { + var Ctor = object.constructor; + if (!(typeof Ctor == 'function' && Ctor instanceof Ctor)) { + Ctor = Object; } + return new Ctor; } /** - * Flattens a nested array (the nesting can be to any depth). If `shallow` is - * truthy, `array` will only be flattened a single level. + * Initializes an object clone based on its `toStringTag`. * - * @static - * @memberOf _ - * @category Arrays - * @param {Array} array The array to compact. - * @param {Boolean} shallow A flag to indicate only flattening a single level. - * @returns {Array} Returns a new flattened array. - * @example + * **Note:** This function only supports cloning values with tags of + * `Boolean`, `Date`, `Error`, `Number`, `RegExp`, or `String`. * - * _.flatten([1, [2], [3, [[4]]]]); - * // => [1, 2, 3, 4]; - * - * _.flatten([1, [2], [3, [[4]]]], true); - * // => [1, 2, 3, [[4]]]; + * @private + * @param {Object} object The object to clone. + * @param {string} tag The `toStringTag` of the object to clone. + * @param {boolean} [isDeep] Specify a deep clone. + * @returns {Object} Returns the initialized clone. */ - function flatten(array, shallow) { - var index = -1, - length = array ? array.length : 0, - result = []; - - while (++index < length) { - var value = array[index]; - - // recursively flatten arrays (susceptible to call stack limits) - if (isArray(value)) { - push.apply(result, shallow ? value : flatten(value)); - } else { - result.push(value); - } + function initCloneByTag(object, tag, isDeep) { + var Ctor = object.constructor; + switch (tag) { + case arrayBufferTag: + return bufferClone(object); + + case boolTag: + case dateTag: + return new Ctor(+object); + + case float32Tag: case float64Tag: + case int8Tag: case int16Tag: case int32Tag: + case uint8Tag: case uint8ClampedTag: case uint16Tag: case uint32Tag: + // Safari 5 mobile incorrectly has `Object` as the constructor of typed arrays. + if (Ctor instanceof Ctor) { + Ctor = ctorByTag[tag]; + } + var buffer = object.buffer; + return new Ctor(isDeep ? bufferClone(buffer) : buffer, object.byteOffset, object.length); + + case numberTag: + case stringTag: + return new Ctor(object); + + case regexpTag: + var result = new Ctor(object.source, reFlags.exec(object)); + result.lastIndex = object.lastIndex; } return result; } /** - * Gets the index at which the first occurrence of `value` is found using - * strict equality for comparisons, i.e. `===`. If the `array` is already - * sorted, passing `true` for `fromIndex` will run a faster binary search. - * - * @static - * @memberOf _ - * @category Arrays - * @param {Array} array The array to search. - * @param {Mixed} value The value to search for. - * @param {Boolean|Number} [fromIndex=0] The index to search from or `true` to - * perform a binary search on a sorted `array`. - * @returns {Number} Returns the index of the matched value or `-1`. - * @example - * - * _.indexOf([1, 2, 3, 1, 2, 3], 2); - * // => 1 + * Checks if `value` is array-like. * - * _.indexOf([1, 2, 3, 1, 2, 3], 2, 3); - * // => 4 + * @private + * @param {*} value The value to check. + * @returns {boolean} Returns `true` if `value` is array-like, else `false`. + */ + function isArrayLike(value) { + return value != null && isLength(getLength(value)); + } + + /** + * Checks if `value` is a valid array-like index. * - * _.indexOf([1, 1, 2, 2, 3, 3], 2, true); - * // => 2 + * @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 indexOf(array, value, fromIndex) { - var index = -1, - length = array ? array.length : 0; + function isIndex(value, length) { + value = (typeof value == 'number' || reIsUint.test(value)) ? +value : -1; + length = length == null ? MAX_SAFE_INTEGER : length; + return value > -1 && value % 1 == 0 && value < length; + } - if (typeof fromIndex == 'number') { - index = (fromIndex < 0 ? nativeMax(0, length + fromIndex) : fromIndex || 0) - 1; - } else if (fromIndex) { - index = sortedIndex(array, value); - return array[index] === value ? index : -1; + /** + * Checks if the provided 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; } - while (++index < length) { - if (array[index] === value) { - return index; - } + var type = typeof index; + if (type == 'number' + ? (isArrayLike(object) && isIndex(index, object.length)) + : (type == 'string' && index in object)) { + var other = object[index]; + return value === value ? (value === other) : (other !== other); } - return -1; + return false; } /** - * Gets all but the last element of `array`. Pass `n` to exclude the last `n` - * elements from the result. - * - * @static - * @memberOf _ - * @category Arrays - * @param {Array} array The array to query. - * @param {Number} [n=1] The number of elements to exclude. - * @param- {Object} [guard] Internally used to allow this method to work with - * others like `_.map` without using their callback `index` argument for `n`. - * @returns {Array} Returns all but the last element, or `n` elements, of `array`. - * @example + * Checks if `value` is a property name and not a property path. * - * _.initial([3, 2, 1]); - * // => [3, 2] + * @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 initial(array, n, guard) { - if (!array) { - return []; + function isKey(value, object) { + var type = typeof value; + if ((type == 'string' && reIsPlainProp.test(value)) || type == 'number') { + return true; + } + if (isArray(value)) { + return false; } - var length = array.length; - n = n == null || guard ? 1 : n || 0; - return slice(array, 0, nativeMin(nativeMax(0, length - n), length)); + var result = !reIsDeepProp.test(value); + return result || (object != null && value in toObject(object)); } /** - * Computes the intersection of all the passed-in arrays using strict equality - * for comparisons, i.e. `===`. - * - * @static - * @memberOf _ - * @category Arrays - * @param {Array} [array1, array2, ...] Arrays to process. - * @returns {Array} Returns a new array of unique elements that are present - * in **all** of the arrays. - * @example + * Checks if `func` has a lazy counterpart. * - * _.intersection([1, 2, 3], [101, 2, 1, 10], [2, 1]); - * // => [1, 2] + * @private + * @param {Function} func The function to check. + * @returns {boolean} Returns `true` if `func` has a lazy counterpart, else `false`. */ - function intersection(array) { - var args = arguments, - argsLength = args.length, - cache = { '0': {} }, - index = -1, - length = array ? array.length : 0, - isLarge = length >= 100, - result = [], - seen = result; - - outer: - while (++index < length) { - var value = array[index]; - if (isLarge) { - var key = value + ''; - var inited = hasOwnProperty.call(cache[0], key) - ? !(seen = cache[0][key]) - : (seen = cache[0][key] = []); - } - if (inited || indexOf(seen, value) < 0) { - if (isLarge) { - seen.push(value); - } - var argsIndex = argsLength; - while (--argsIndex) { - if (!(cache[argsIndex] || (cache[argsIndex] = cachedContains(args[argsIndex], 0, 100)))(value)) { - continue outer; - } - } - result.push(value); - } + function isLaziable(func) { + var funcName = getFuncName(func); + if (!(funcName in LazyWrapper.prototype)) { + return false; } - return result; + var other = lodash[funcName]; + if (func === other) { + return true; + } + var data = getData(other); + return !!data && func === data[0]; } /** - * Gets the last element of the `array`. Pass `n` to return the last `n` - * elements of the `array`. + * Checks if `value` is a valid array-like length. * - * @static - * @memberOf _ - * @category Arrays - * @param {Array} array The array to query. - * @param {Number} [n] The number of elements to return. - * @param- {Object} [guard] Internally used to allow this method to work with - * others like `_.map` without using their callback `index` argument for `n`. - * @returns {Mixed} Returns the last element, or an array of the last `n` - * elements, of `array`. - * @example + * **Note:** This function is based on [`ToLength`](https://people.mozilla.org/~jorendorff/es6-draft.html#sec-tolength). * - * _.last([3, 2, 1]); - * // => 1 + * @private + * @param {*} value The value to check. + * @returns {boolean} Returns `true` if `value` is a valid length, else `false`. */ - function last(array, n, guard) { - if (array) { - var length = array.length; - return (n == null || guard) ? array[length - 1] : slice(array, nativeMax(0, length - n)); - } + function isLength(value) { + return typeof value == 'number' && value > -1 && value % 1 == 0 && value <= MAX_SAFE_INTEGER; } /** - * Gets the index at which the last occurrence of `value` is found using strict - * equality for comparisons, i.e. `===`. If `fromIndex` is negative, it is used - * as the offset from the end of the collection. + * Checks if `value` is suitable for strict equality comparisons, i.e. `===`. * - * @static - * @memberOf _ - * @category Arrays - * @param {Array} array The array to search. - * @param {Mixed} 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 or `-1`. - * @example + * @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); + } + + /** + * Merges the function metadata of `source` into `data`. * - * _.lastIndexOf([1, 2, 3, 1, 2, 3], 2); - * // => 4 + * Merging metadata reduces the number of wrappers required 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` + * augment function arguments, making the order in which they are executed important, + * preventing the merging of metadata. However, we make an exception for a safe + * common case where curried functions have `_.ary` and or `_.rearg` applied. * - * _.lastIndexOf([1, 2, 3, 1, 2, 3], 2, 3); - * // => 1 + * @private + * @param {Array} data The destination metadata. + * @param {Array} source The source metadata. + * @returns {Array} Returns `data`. */ - function lastIndexOf(array, value, fromIndex) { - var index = array ? array.length : 0; - if (typeof fromIndex == 'number') { - index = (fromIndex < 0 ? nativeMax(0, index + fromIndex) : nativeMin(fromIndex, index - 1)) + 1; + function mergeData(data, source) { + var bitmask = data[1], + srcBitmask = source[1], + newBitmask = bitmask | srcBitmask, + isCommon = newBitmask < ARY_FLAG; + + var isCombo = + (srcBitmask == ARY_FLAG && bitmask == CURRY_FLAG) || + (srcBitmask == ARY_FLAG && bitmask == REARG_FLAG && data[7].length <= source[8]) || + (srcBitmask == (ARY_FLAG | REARG_FLAG) && bitmask == CURRY_FLAG); + + // Exit early if metadata can't be merged. + if (!(isCommon || isCombo)) { + return data; + } + // Use source `thisArg` if available. + if (srcBitmask & BIND_FLAG) { + data[2] = source[2]; + // Set when currying a bound function. + newBitmask |= (bitmask & BIND_FLAG) ? 0 : CURRY_BOUND_FLAG; + } + // Compose partial arguments. + var value = source[3]; + if (value) { + var partials = data[3]; + data[3] = partials ? composeArgs(partials, value, source[4]) : arrayCopy(value); + data[4] = partials ? replaceHolders(data[3], PLACEHOLDER) : arrayCopy(source[4]); } - while (index--) { - if (array[index] === value) { - return index; - } + // Compose partial right arguments. + value = source[5]; + if (value) { + partials = data[5]; + data[5] = partials ? composeArgsRight(partials, value, source[6]) : arrayCopy(value); + data[6] = partials ? replaceHolders(data[5], PLACEHOLDER) : arrayCopy(source[6]); } - return -1; + // Use source `argPos` if available. + value = source[7]; + if (value) { + data[7] = arrayCopy(value); + } + // Use source `ary` if it's smaller. + if (srcBitmask & 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; + + return data; } /** - * Creates an object composed from arrays of `keys` and `values`. Pass either - * a single two dimensional array, i.e. `[[key1, value1], [key2, value2]]`, or - * two arrays, one of `keys` and one of corresponding `values`. - * - * @static - * @memberOf _ - * @category Arrays - * @param {Array} keys The array of keys. - * @param {Array} [values=[]] The array of values. - * @returns {Object} Returns an object composed of the given keys and - * corresponding values. - * @example + * A specialized version of `_.pick` which picks `object` properties specified + * by `props`. * - * _.object(['moe', 'larry', 'curly'], [30, 40, 50]); - * // => { 'moe': 30, 'larry': 40, 'curly': 50 } + * @private + * @param {Object} object The source object. + * @param {string[]} props The property names to pick. + * @returns {Object} Returns the new object. */ - function object(keys, values) { + function pickByArray(object, props) { + object = toObject(object); + var index = -1, - length = keys ? keys.length : 0, + length = props.length, result = {}; while (++index < length) { - var key = keys[index]; - if (values) { - result[key] = values[index]; - } else { - result[key[0]] = key[1]; + var key = props[index]; + if (key in object) { + result[key] = object[key]; } } return result; } /** - * Creates an array of numbers (positive and/or negative) progressing from - * `start` up to but not including `stop`. This method is a port of Python's - * `range()` function. See http://docs.python.org/library/functions.html#range. + * A specialized version of `_.pick` which picks `object` properties `predicate` + * returns truthy for. * - * @static - * @memberOf _ - * @category Arrays - * @param {Number} [start=0] The start of the range. - * @param {Number} end The end of the range. - * @param {Number} [step=1] The value to increment or descrement by. - * @returns {Array} Returns a new range array. - * @example + * @private + * @param {Object} object The source object. + * @param {Function} predicate The function invoked per iteration. + * @returns {Object} Returns the new object. + */ + function pickByCallback(object, predicate) { + var result = {}; + baseForIn(object, function(value, key, object) { + if (predicate(value, key, object)) { + result[key] = value; + } + }); + return result; + } + + /** + * 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. * - * _.range(10); - * // => [0, 1, 2, 3, 4, 5, 6, 7, 8, 9] + * @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 = arrayCopy(array); + + while (length--) { + var index = indexes[length]; + array[length] = isIndex(index, arrLength) ? oldArray[index] : undefined; + } + return array; + } + + /** + * Sets metadata for `func`. * - * _.range(1, 11); - * // => [1, 2, 3, 4, 5, 6, 7, 8, 9, 10] + * **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://code.google.com/p/v8/issues/detail?id=2070) + * for more details. * - * _.range(0, 30, 5); - * // => [0, 5, 10, 15, 20, 25] + * @private + * @param {Function} func The function to associate metadata with. + * @param {*} data The metadata. + * @returns {Function} Returns `func`. + */ + var setData = (function() { + var count = 0, + lastCalled = 0; + + return function(key, value) { + var stamp = now(), + remaining = HOT_SPAN - (stamp - lastCalled); + + lastCalled = stamp; + if (remaining > 0) { + if (++count >= HOT_COUNT) { + return key; + } + } else { + count = 0; + } + return baseSetData(key, value); + }; + }()); + + /** + * A fallback implementation of `_.isPlainObject` which checks if `value` + * is an object created by the `Object` constructor or has a `[[Prototype]]` + * of `null`. * - * _.range(0, -10, -1); - * // => [0, -1, -2, -3, -4, -5, -6, -7, -8, -9] + * @private + * @param {*} value The value to check. + * @returns {boolean} Returns `true` if `value` is a plain object, else `false`. + */ + function shimIsPlainObject(value) { + var Ctor, + support = lodash.support; + + // Exit early for non `Object` objects. + if (!(isObjectLike(value) && objToString.call(value) == objectTag && !isHostObject(value)) || + (!hasOwnProperty.call(value, 'constructor') && + (Ctor = value.constructor, typeof Ctor == 'function' && !(Ctor instanceof Ctor))) || + (!support.argsTag && isArguments(value))) { + return false; + } + // IE < 9 iterates inherited properties before own properties. If the first + // iterated property is an object's own property then there are no inherited + // enumerable properties. + var result; + if (support.ownLast) { + baseForIn(value, function(subValue, key, object) { + result = hasOwnProperty.call(object, key); + return false; + }); + return result !== false; + } + // In most environments an object's own properties are iterated before + // its inherited properties. If the last iterated property is an object's + // own property then there are no inherited enumerable properties. + baseForIn(value, function(subValue, key) { + result = key; + }); + return result === undefined || hasOwnProperty.call(value, result); + } + + /** + * A fallback implementation of `Object.keys` which creates an array of the + * own enumerable property names of `object`. * - * _.range(0); - * // => [] + * @private + * @param {Object} object The object to query. + * @returns {Array} Returns the array of property names. */ - function range(start, end, step) { - start = +start || 0; - step = +step || 1; + function shimKeys(object) { + var props = keysIn(object), + propsLength = props.length, + length = propsLength && object.length; + + var allowIndexes = !!length && isLength(length) && + (isArray(object) || isArguments(object) || isString(object)); - if (end == null) { - end = start; - start = 0; - } - // use `Array(length)` so V8 will avoid the slower "dictionary" mode - // http://youtu.be/XAqIpGU8ZZk#t=17m25s var index = -1, - length = nativeMax(0, ceil((end - start) / step)), - result = Array(length); + result = []; - while (++index < length) { - result[index] = start; - start += step; + while (++index < propsLength) { + var key = props[index]; + if ((allowIndexes && isIndex(key, length)) || hasOwnProperty.call(object, key)) { + result.push(key); + } } return result; } /** - * The opposite of `_.initial`, this method gets all but the first value of - * `array`. Pass `n` to exclude the first `n` values from the result. - * - * @static - * @memberOf _ - * @alias drop, tail - * @category Arrays - * @param {Array} array The array to query. - * @param {Number} [n=1] The number of elements to exclude. - * @param- {Object} [guard] Internally used to allow this method to work with - * others like `_.map` without using their callback `index` argument for `n`. - * @returns {Array} Returns all but the first element, or `n` elements, of `array`. - * @example + * Converts `value` to an object if it's not one. * - * _.rest([3, 2, 1]); - * // => [2, 1] + * @private + * @param {*} value The value to process. + * @returns {Object} Returns the object. */ - function rest(array, n, guard) { - return slice(array, (n == null || guard) ? 1 : nativeMax(0, n)); + function toObject(value) { + if (lodash.support.unindexedChars && isString(value)) { + var index = -1, + length = value.length, + result = Object(value); + + while (++index < length) { + result[index] = value.charAt(index); + } + return result; + } + return isObject(value) ? value : Object(value); } /** - * Uses a binary search to determine the smallest index at which the `value` - * should be inserted into `array` in order to maintain the sort order of the - * sorted `array`. If `callback` is passed, it will be executed for `value` and - * each element in `array` to compute their sort ranking. The `callback` is - * bound to `thisArg` and invoked with one argument; (value). The `callback` - * argument may also be the name of a property to order by. - * - * @static - * @memberOf _ - * @category Arrays - * @param {Array} array The array to iterate over. - * @param {Mixed} value The value to evaluate. - * @param {Function|String} [callback=identity|property] The function called - * per iteration or property name to order by. - * @param {Mixed} [thisArg] The `this` binding of `callback`. - * @returns {Number} Returns the index at which the value should be inserted - * into `array`. - * @example - * - * _.sortedIndex([20, 30, 50], 40); - * // => 2 - * - * _.sortedIndex([{ 'x': 20 }, { 'x': 30 }, { 'x': 50 }], { 'x': 40 }, 'x'); - * // => 2 - * - * var dict = { - * 'wordToNumber': { 'twenty': 20, 'thirty': 30, 'fourty': 40, 'fifty': 50 } - * }; - * - * _.sortedIndex(['twenty', 'thirty', 'fifty'], 'fourty', function(word) { - * return dict.wordToNumber[word]; - * }); - * // => 2 + * Converts `value` to property path array if it's not one. * - * _.sortedIndex(['twenty', 'thirty', 'fifty'], 'fourty', function(word) { - * return this.wordToNumber[word]; - * }, dict); - * // => 2 + * @private + * @param {*} value The value to process. + * @returns {Array} Returns the property path array. */ - function sortedIndex(array, value, callback, thisArg) { - var low = 0, - high = array ? array.length : low; - - // explicitly reference `identity` for better inlining in Firefox - callback = callback ? createCallback(callback, thisArg) : identity; - value = callback(value); - - while (low < high) { - var mid = (low + high) >>> 1; - callback(array[mid]) < value - ? low = mid + 1 - : high = mid; + function toPath(value) { + if (isArray(value)) { + return value; } - return low; + var result = []; + baseToString(value).replace(rePropName, function(match, number, quote, string) { + result.push(quote ? string.replace(reEscapeChar, '$1') : (number || match)); + }); + return result; } /** - * Computes the union of the passed-in arrays using strict equality for - * comparisons, i.e. `===`. - * - * @static - * @memberOf _ - * @category Arrays - * @param {Array} [array1, array2, ...] Arrays to process. - * @returns {Array} Returns a new array of unique values, in order, that are - * present in one or more of the arrays. - * @example + * Creates a clone of `wrapper`. * - * _.union([1, 2, 3], [101, 2, 1, 10], [2, 1]); - * // => [1, 2, 3, 101, 10] + * @private + * @param {Object} wrapper The wrapper to clone. + * @returns {Object} Returns the cloned wrapper. */ - function union() { - return uniq(concat.apply(arrayRef, arguments)); + function wrapperClone(wrapper) { + return wrapper instanceof LazyWrapper + ? wrapper.clone() + : new LodashWrapper(wrapper.__wrapped__, wrapper.__chain__, arrayCopy(wrapper.__actions__)); } + /*------------------------------------------------------------------------*/ + /** - * Creates a duplicate-value-free version of the `array` using strict equality - * for comparisons, i.e. `===`. If the `array` is already sorted, passing `true` - * for `isSorted` will run a faster algorithm. If `callback` is passed, each - * element of `array` is passed through a callback` before uniqueness is computed. - * The `callback` is bound to `thisArg` and invoked with three arguments; (value, index, array). + * Creates an array of elements split into groups the length of `size`. + * If `collection` can't be split evenly, the final chunk will be the remaining + * elements. * * @static * @memberOf _ - * @alias unique - * @category Arrays + * @category Array * @param {Array} array The array to process. - * @param {Boolean} [isSorted=false] A flag to indicate that the `array` is already sorted. - * @param {Function} [callback=identity] The function called per iteration. - * @param {Mixed} [thisArg] The `this` binding of `callback`. - * @returns {Array} Returns a duplicate-value-free array. + * @param {number} [size=1] The length of each chunk. + * @param- {Object} [guard] Enables use as a callback for functions like `_.map`. + * @returns {Array} Returns the new array containing chunks. * @example * - * _.uniq([1, 2, 1, 3, 1]); - * // => [1, 2, 3] - * - * _.uniq([1, 1, 2, 2, 3], true); - * // => [1, 2, 3] - * - * _.uniq([1, 2, 1.5, 3, 2.5], function(num) { return Math.floor(num); }); - * // => [1, 2, 3] + * _.chunk(['a', 'b', 'c', 'd'], 2); + * // => [['a', 'b'], ['c', 'd']] * - * _.uniq([1, 2, 1.5, 3, 2.5], function(num) { return this.floor(num); }, Math); - * // => [1, 2, 3] + * _.chunk(['a', 'b', 'c', 'd'], 3); + * // => [['a', 'b', 'c'], ['d']] */ - function uniq(array, isSorted, callback, thisArg) { - var index = -1, - length = array ? array.length : 0, - result = [], - seen = result; - - // juggle arguments - if (typeof isSorted == 'function') { - thisArg = callback; - callback = isSorted; - isSorted = false; - } - // init value cache for large arrays - var isLarge = !isSorted && length >= 75; - if (isLarge) { - var cache = {}; - } - if (callback) { - seen = []; - callback = createCallback(callback, thisArg); + function chunk(array, size, guard) { + if (guard ? isIterateeCall(array, size, guard) : size == null) { + size = 1; + } else { + size = nativeMax(+size || 1, 1); } - while (++index < length) { - var value = array[index], - computed = callback ? callback(value, index, array) : value; + var index = 0, + length = array ? array.length : 0, + resIndex = -1, + result = Array(ceil(length / size)); - if (isLarge) { - var key = computed + ''; - var inited = hasOwnProperty.call(cache, key) - ? !(seen = cache[key]) - : (seen = cache[key] = []); - } - if (isSorted - ? !index || seen[seen.length - 1] !== computed - : inited || indexOf(seen, computed) < 0 - ) { - if (callback || isLarge) { - seen.push(computed); - } - result.push(value); - } + while (index < length) { + result[++resIndex] = baseSlice(array, index, (index += size)); } return result; } /** - * Creates an array with all occurrences of the passed values removed using - * strict equality for comparisons, i.e. `===`. + * Creates an array with all falsey values removed. The values `false`, `null`, + * `0`, `""`, `undefined`, and `NaN` are falsey. * * @static * @memberOf _ - * @category Arrays - * @param {Array} array The array to filter. - * @param {Mixed} [value1, value2, ...] Values to remove. - * @returns {Array} Returns a new filtered array. + * @category Array + * @param {Array} array The array to compact. + * @returns {Array} Returns the new array of filtered values. * @example * - * _.without([1, 2, 1, 0, 3, 1, 4], 0, 1); - * // => [2, 3, 4] + * _.compact([0, 1, false, 2, '', 3]); + * // => [1, 2, 3] */ - function without(array) { + function compact(array) { var index = -1, length = array ? array.length : 0, - contains = cachedContains(arguments, 1, 20), + resIndex = -1, result = []; while (++index < length) { var value = array[index]; - if (!contains(value)) { - result.push(value); + if (value) { + result[++resIndex] = value; } } return result; } /** - * Groups the elements of each array at their corresponding indexes. Useful for - * separate data sources that are coordinated through matching array indexes. - * For a matrix of nested arrays, `_.zip.apply(...)` can transpose the matrix - * in a similar fashion. + * Creates an array of unique `array` values not included in the other + * provided arrays using [`SameValueZero`](https://people.mozilla.org/~jorendorff/es6-draft.html#sec-samevaluezero) + * for equality comparisons. * * @static * @memberOf _ - * @category Arrays - * @param {Array} [array1, array2, ...] Arrays to process. - * @returns {Array} Returns a new array of grouped elements. + * @category Array + * @param {Array} array The array to inspect. + * @param {...Array} [values] The arrays of values to exclude. + * @returns {Array} Returns the new array of filtered values. * @example * - * _.zip(['moe', 'larry', 'curly'], [30, 40, 50], [true, false, false]); - * // => [['moe', 30, true], ['larry', 40, false], ['curly', 50, false]] + * _.difference([1, 2, 3], [4, 2]); + * // => [1, 3] */ - function zip(array) { - var index = -1, - length = array ? max(pluck(arguments, 'length')) : 0, - result = Array(length); - - while (++index < length) { - result[index] = pluck(arguments, index); - } - return result; - } - - /*--------------------------------------------------------------------------*/ - - /** - * Creates a function that is restricted to executing `func` only after it is - * called `n` times. The `func` is executed with the `this` binding of the - * created function. - * - * @static - * @memberOf _ - * @category Functions - * @param {Number} n The number of times the function must be called before - * it is executed. - * @param {Function} func The function to restrict. - * @returns {Function} Returns the new restricted function. - * @example - * - * var renderNotes = _.after(notes.length, render); - * _.forEach(notes, function(note) { - * note.asyncSave({ 'success': renderNotes }); - * }); - * // `renderNotes` is run once, after all notes have saved - */ - function after(n, func) { - if (n < 1) { - return func(); - } - return function() { - if (--n < 1) { - return func.apply(this, arguments); - } - }; - } + var difference = restParam(function(array, values) { + return isArrayLike(array) + ? baseDifference(array, baseFlatten(values, false, true)) + : []; + }); /** - * Creates a function that, when called, invokes `func` with the `this` - * binding of `thisArg` and prepends any additional `bind` arguments to those - * passed to the bound function. + * Gets the first element of `array`. * * @static * @memberOf _ - * @category Functions - * @param {Function} func The function to bind. - * @param {Mixed} [thisArg] The `this` binding of `func`. - * @param {Mixed} [arg1, arg2, ...] Arguments to be partially applied. - * @returns {Function} Returns the new bound function. + * @alias head + * @category Array + * @param {Array} array The array to query. + * @returns {*} Returns the first element of `array`. * @example * - * var func = function(greeting) { - * return greeting + ' ' + this.name; - * }; + * _.first([1, 2, 3]); + * // => 1 * - * func = _.bind(func, { 'name': 'moe' }, 'hi'); - * func(); - * // => 'hi moe' + * _.first([]); + * // => undefined */ - function bind(func, thisArg) { - // use `Function#bind` if it exists and is fast - // (in V8 `Function#bind` is slower except when partially applied) - return isBindFast || (nativeBind && arguments.length > 2) - ? nativeBind.call.apply(nativeBind, arguments) - : createBound(func, thisArg, slice(arguments, 2)); + function first(array) { + return array ? array[0] : undefined; } /** - * Binds methods on `object` to `object`, overwriting the existing method. - * If no method names are provided, all the function properties of `object` - * will be bound. + * Flattens a nested array. If `isDeep` is `true` the array is recursively + * flattened, otherwise it is only flattened a single level. * * @static * @memberOf _ - * @category Functions - * @param {Object} object The object to bind and assign the bound methods to. - * @param {String} [methodName1, methodName2, ...] Method names on the object to bind. - * @returns {Object} Returns `object`. + * @category Array + * @param {Array} array The array to flatten. + * @param {boolean} [isDeep] Specify a deep flatten. + * @param- {Object} [guard] Enables use as a callback for functions like `_.map`. + * @returns {Array} Returns the new flattened array. * @example * - * var buttonView = { - * 'label': 'lodash', - * 'onClick': function() { alert('clicked: ' + this.label); } - * }; + * _.flatten([1, [2, 3, [4]]]); + * // => [1, 2, 3, [4]] * - * _.bindAll(buttonView); - * jQuery('#lodash_button').on('click', buttonView.onClick); - * // => When the button is clicked, `this.label` will have the correct value + * // using `isDeep` + * _.flatten([1, [2, 3, [4]]], true); + * // => [1, 2, 3, 4] */ - function bindAll(object) { - var funcs = arguments, - index = funcs.length > 1 ? 0 : (funcs = functions(object), -1), - length = funcs.length; - - while (++index < length) { - var key = funcs[index]; - object[key] = bind(object[key], object); + function flatten(array, isDeep, guard) { + var length = array ? array.length : 0; + if (guard && isIterateeCall(array, isDeep, guard)) { + isDeep = false; } - return object; + return length ? baseFlatten(array, isDeep) : []; } /** - * Creates a function that, when called, invokes the method at `object[key]` - * and prepends any additional `bindKey` arguments to those passed to the bound - * function. This method differs from `_.bind` by allowing bound functions to - * reference methods that will be redefined or don't yet exist. - * See http://michaux.ca/articles/lazy-function-definition-pattern. + * Gets the index at which the first occurrence of `value` is found in `array` + * using [`SameValueZero`](https://people.mozilla.org/~jorendorff/es6-draft.html#sec-samevaluezero) + * for equality comparisons. If `fromIndex` is negative, it is used as the offset + * from the end of `array`. If `array` is sorted providing `true` for `fromIndex` + * performs a faster binary search. * * @static * @memberOf _ - * @category Functions - * @param {Object} object The object the method belongs to. - * @param {String} key The key of the method. - * @param {Mixed} [arg1, arg2, ...] Arguments to be partially applied. - * @returns {Function} Returns the new bound function. + * @category Array + * @param {Array} array The array to search. + * @param {*} value The value to search for. + * @param {boolean|number} [fromIndex=0] The index to search from or `true` + * to perform a binary search on a sorted array. + * @returns {number} Returns the index of the matched value, else `-1`. * @example * - * var object = { - * 'name': 'moe', - * 'greet': function(greeting) { - * return greeting + ' ' + this.name; - * } - * }; - * - * var func = _.bindKey(object, 'greet', 'hi'); - * func(); - * // => 'hi moe' - * - * object.greet = function(greeting) { - * return greeting + ', ' + this.name + '!'; - * }; - * - * func(); - * // => 'hi, moe!' - */ - function bindKey(object, key) { - return createBound(object, key, slice(arguments, 2)); - } - - /** - * Creates a function that is the composition of the passed functions, - * where each function consumes the return value of the function that follows. - * In math terms, composing the functions `f()`, `g()`, and `h()` produces `f(g(h()))`. - * Each function is executed with the `this` binding of the composed function. + * _.indexOf([1, 2, 1, 2], 2); + * // => 1 * - * @static - * @memberOf _ - * @category Functions - * @param {Function} [func1, func2, ...] Functions to compose. - * @returns {Function} Returns the new composed function. - * @example + * // using `fromIndex` + * _.indexOf([1, 2, 1, 2], 2, 2); + * // => 3 * - * var greet = function(name) { return 'hi: ' + name; }; - * var exclaim = function(statement) { return statement + '!'; }; - * var welcome = _.compose(exclaim, greet); - * welcome('moe'); - * // => 'hi: moe!' + * // performing a binary search + * _.indexOf([1, 1, 2, 2], 2, true); + * // => 2 */ - function compose() { - var funcs = arguments; - return function() { - var args = arguments, - length = funcs.length; + function indexOf(array, value, fromIndex) { + var length = array ? array.length : 0; + if (!length) { + return -1; + } + if (typeof fromIndex == 'number') { + fromIndex = fromIndex < 0 ? nativeMax(length + fromIndex, 0) : fromIndex; + } else if (fromIndex) { + var index = binaryIndex(array, value), + other = array[index]; - while (length--) { - args = [funcs[length].apply(this, args)]; + if (value === value ? (value === other) : (other !== other)) { + return index; } - return args[0]; - }; + return -1; + } + return baseIndexOf(array, value, fromIndex || 0); } /** - * Creates a function that will delay the execution of `func` until after - * `wait` milliseconds have elapsed since the last time it was invoked. Pass - * `true` for `immediate` to cause debounce to invoke `func` on the leading, - * instead of the trailing, edge of the `wait` timeout. Subsequent calls to - * the debounced function will return the result of the last `func` call. + * Creates an array of unique values that are included in all of the provided + * arrays using [`SameValueZero`](https://people.mozilla.org/~jorendorff/es6-draft.html#sec-samevaluezero) + * for equality comparisons. * * @static * @memberOf _ - * @category Functions - * @param {Function} func The function to debounce. - * @param {Number} wait The number of milliseconds to delay. - * @param {Boolean} immediate A flag to indicate execution is on the leading - * edge of the timeout. - * @returns {Function} Returns the new debounced function. + * @category Array + * @param {...Array} [arrays] The arrays to inspect. + * @returns {Array} Returns the new array of shared values. * @example - * - * var lazyLayout = _.debounce(calculateLayout, 300); - * jQuery(window).on('resize', lazyLayout); + * _.intersection([1, 2], [4, 2], [2, 1]); + * // => [2] */ - function debounce(func, wait, immediate) { - var args, - result, - thisArg, - timeoutId; + var intersection = restParam(function(arrays) { + var othLength = arrays.length, + othIndex = othLength, + caches = Array(length), + indexOf = getIndexOf(), + isCommon = indexOf == baseIndexOf, + result = []; - function delayed() { - timeoutId = null; - if (!immediate) { - result = func.apply(thisArg, args); - } + while (othIndex--) { + var value = arrays[othIndex] = isArrayLike(value = arrays[othIndex]) ? value : []; + caches[othIndex] = (isCommon && value.length >= 120) ? createCache(othIndex && value) : null; } - return function() { - var isImmediate = immediate && !timeoutId; - args = arguments; - thisArg = this; - - clearTimeout(timeoutId); - timeoutId = setTimeout(delayed, wait); + var array = arrays[0], + index = -1, + length = array ? array.length : 0, + seen = caches[0]; - if (isImmediate) { - result = func.apply(thisArg, args); + outer: + while (++index < length) { + value = array[index]; + if ((seen ? cacheIndexOf(seen, value) : indexOf(result, value, 0)) < 0) { + var othIndex = othLength; + while (--othIndex) { + var cache = caches[othIndex]; + if ((cache ? cacheIndexOf(cache, value) : indexOf(arrays[othIndex], value, 0)) < 0) { + continue outer; + } + } + if (seen) { + seen.push(value); + } + result.push(value); } - return result; - }; - } + } + return result; + }); /** - * Executes the `func` function after `wait` milliseconds. Additional arguments - * will be passed to `func` when it is invoked. + * Gets the last element of `array`. * * @static * @memberOf _ - * @category Functions - * @param {Function} func The function to delay. - * @param {Number} wait The number of milliseconds to delay execution. - * @param {Mixed} [arg1, arg2, ...] Arguments to invoke the function with. - * @returns {Number} Returns the `setTimeout` timeout id. + * @category Array + * @param {Array} array The array to query. + * @returns {*} Returns the last element of `array`. * @example * - * var log = _.bind(console.log, console); - * _.delay(log, 1000, 'logged later'); - * // => 'logged later' (Appears after one second.) + * _.last([1, 2, 3]); + * // => 3 */ - function delay(func, wait) { - var args = slice(arguments, 2); - return setTimeout(function() { func.apply(undefined, args); }, wait); + function last(array) { + var length = array ? array.length : 0; + return length ? array[length - 1] : undefined; } /** - * Defers executing the `func` function until the current call stack has cleared. - * Additional arguments will be passed to `func` when it is invoked. + * Creates an array of unique values, in order, from all of the provided arrays + * using [`SameValueZero`](https://people.mozilla.org/~jorendorff/es6-draft.html#sec-samevaluezero) + * for equality comparisons. * * @static * @memberOf _ - * @category Functions - * @param {Function} func The function to defer. - * @param {Mixed} [arg1, arg2, ...] Arguments to invoke the function with. - * @returns {Number} Returns the `setTimeout` timeout id. + * @category Array + * @param {...Array} [arrays] The arrays to inspect. + * @returns {Array} Returns the new array of combined values. * @example * - * _.defer(function() { alert('deferred'); }); - * // returns from the function before `alert` is called + * _.union([1, 2], [4, 2], [2, 1]); + * // => [1, 2, 4] */ - function defer(func) { - var args = slice(arguments, 1); - return setTimeout(function() { func.apply(undefined, args); }, 1); - } + var union = restParam(function(arrays) { + return baseUniq(baseFlatten(arrays, false, true)); + }); /** - * Creates a function that memoizes the result of `func`. If `resolver` is - * passed, it will be used to determine the cache key for storing the result - * based on the arguments passed to the memoized function. By default, the first - * argument passed to the memoized function is used as the cache key. The `func` - * is executed with the `this` binding of the memoized function. + * Creates a duplicate-free version of an array, using + * [`SameValueZero`](https://people.mozilla.org/~jorendorff/es6-draft.html#sec-samevaluezero) + * for equality comparisons, in which only the first occurence of each element + * is kept. Providing `true` for `isSorted` performs a faster search algorithm + * for sorted arrays. If an iteratee function is provided it is invoked for + * each element in the array to generate the criterion by which uniqueness + * is computed. The `iteratee` is bound to `thisArg` and invoked with three + * arguments: (value, index, array). + * + * If a property name is provided for `iteratee` the created `_.property` + * style callback returns the property value of the given element. + * + * If a value is also provided for `thisArg` the created `_.matchesProperty` + * style callback returns `true` for elements that have a matching property + * value, else `false`. + * + * If an object is provided for `iteratee` the created `_.matches` style + * callback returns `true` for elements that have the properties of the given + * object, else `false`. * * @static * @memberOf _ - * @category Functions - * @param {Function} func The function to have its output memoized. - * @param {Function} [resolver] A function used to resolve the cache key. - * @returns {Function} Returns the new memoizing function. + * @alias unique + * @category Array + * @param {Array} array The array to inspect. + * @param {boolean} [isSorted] Specify the array is sorted. + * @param {Function|Object|string} [iteratee] The function invoked per iteration. + * @param {*} [thisArg] The `this` binding of `iteratee`. + * @returns {Array} Returns the new duplicate-value-free array. * @example * - * var fibonacci = _.memoize(function(n) { - * return n < 2 ? n : fibonacci(n - 1) + fibonacci(n - 2); - * }); + * _.uniq([2, 1, 2]); + * // => [2, 1] + * + * // using `isSorted` + * _.uniq([1, 1, 2], true); + * // => [1, 2] + * + * // using an iteratee function + * _.uniq([1, 2.5, 1.5, 2], function(n) { + * return this.floor(n); + * }, Math); + * // => [1, 2.5] + * + * // using the `_.property` callback shorthand + * _.uniq([{ 'x': 1 }, { 'x': 2 }, { 'x': 1 }], 'x'); + * // => [{ 'x': 1 }, { 'x': 2 }] */ - function memoize(func, resolver) { - var cache = {}; - return function() { - var key = resolver ? resolver.apply(this, arguments) : arguments[0]; - return hasOwnProperty.call(cache, key) - ? cache[key] - : (cache[key] = func.apply(this, arguments)); - }; + function uniq(array, isSorted, iteratee, thisArg) { + var length = array ? array.length : 0; + if (!length) { + return []; + } + if (isSorted != null && typeof isSorted != 'boolean') { + thisArg = iteratee; + iteratee = isIterateeCall(array, isSorted, thisArg) ? null : isSorted; + isSorted = false; + } + var callback = getCallback(); + if (!(iteratee == null && callback === baseCallback)) { + iteratee = callback(iteratee, thisArg, 3); + } + return (isSorted && getIndexOf() == baseIndexOf) + ? sortedUniq(array, iteratee) + : baseUniq(array, iteratee); } /** - * Creates a function that is restricted to execute `func` once. Repeat calls to - * the function will return the value of the first call. The `func` is executed - * with the `this` binding of the created function. + * Creates an array excluding all provided values using + * [`SameValueZero`](https://people.mozilla.org/~jorendorff/es6-draft.html#sec-samevaluezero) + * for equality comparisons. * * @static * @memberOf _ - * @category Functions - * @param {Function} func The function to restrict. - * @returns {Function} Returns the new restricted function. + * @category Array + * @param {Array} array The array to filter. + * @param {...*} [values] The values to exclude. + * @returns {Array} Returns the new array of filtered values. * @example * - * var initialize = _.once(createApplication); - * initialize(); - * initialize(); - * // Application is only created once. + * _.without([1, 2, 1, 3], 1, 2); + * // => [3] */ - function once(func) { - var result, - ran = false; - - return function() { - if (ran) { - return result; - } - ran = true; - result = func.apply(this, arguments); + var without = restParam(function(array, values) { + return isArrayLike(array) + ? baseDifference(array, values) + : []; + }); - // clear the `func` variable so the function may be garbage collected - func = null; - return result; - }; - } + /*------------------------------------------------------------------------*/ /** - * Creates a function that, when called, invokes `func` with any additional - * `partial` arguments prepended to those passed to the new function. This - * method is similar to `bind`, except it does **not** alter the `this` binding. + * Creates a `lodash` object that wraps `value` with explicit method + * chaining enabled. * * @static * @memberOf _ - * @category Functions - * @param {Function} func The function to partially apply arguments to. - * @param {Mixed} [arg1, arg2, ...] Arguments to be partially applied. - * @returns {Function} Returns the new partially applied function. + * @category Chain + * @param {*} value The value to wrap. + * @returns {Object} Returns the new `lodash` wrapper instance. * @example * - * var greet = function(greeting, name) { return greeting + ': ' + name; }; - * var hi = _.partial(greet, 'hi'); - * hi('moe'); - * // => 'hi: moe' + * var users = [ + * { 'user': 'barney', 'age': 36 }, + * { 'user': 'fred', 'age': 40 }, + * { 'user': 'pebbles', 'age': 1 } + * ]; + * + * var youngest = _.chain(users) + * .sortBy('age') + * .map(function(chr) { + * return chr.user + ' is ' + chr.age; + * }) + * .first() + * .value(); + * // => 'pebbles is 1' */ - function partial(func) { - return createBound(func, slice(arguments, 1)); + function chain(value) { + var result = lodash(value); + result.__chain__ = true; + return result; } /** - * Creates a function that, when executed, will only call the `func` - * function at most once per every `wait` milliseconds. If the throttled - * function is invoked more than once during the `wait` timeout, `func` will - * also be called on the trailing edge of the timeout. Subsequent calls to the - * throttled function will return the result of the last `func` call. + * This method invokes `interceptor` and returns `value`. The interceptor is + * bound to `thisArg` and invoked with one argument; (value). The purpose of + * this method is to "tap into" a method chain in order to perform operations + * on intermediate results within the chain. * * @static * @memberOf _ - * @category Functions - * @param {Function} func The function to throttle. - * @param {Number} wait The number of milliseconds to throttle executions to. - * @returns {Function} Returns the new throttled function. + * @category Chain + * @param {*} value The value to provide to `interceptor`. + * @param {Function} interceptor The function to invoke. + * @param {*} [thisArg] The `this` binding of `interceptor`. + * @returns {*} Returns `value`. * @example * - * var throttled = _.throttle(updatePosition, 100); - * jQuery(window).on('scroll', throttled); + * _([1, 2, 3]) + * .tap(function(array) { + * array.pop(); + * }) + * .reverse() + * .value(); + * // => [2, 1] */ - function throttle(func, wait) { - var args, - result, - thisArg, - timeoutId, - lastCalled = 0; - - function trailingCall() { - lastCalled = new Date; - timeoutId = null; - result = func.apply(thisArg, args); - } - return function() { - var now = new Date, - remaining = wait - (now - lastCalled); - - args = arguments; - thisArg = this; - - if (remaining <= 0) { - clearTimeout(timeoutId); - timeoutId = null; - lastCalled = now; - result = func.apply(thisArg, args); - } - else if (!timeoutId) { - timeoutId = setTimeout(trailingCall, remaining); - } - return result; - }; + function tap(value, interceptor, thisArg) { + interceptor.call(thisArg, value); + return value; } /** - * Creates a function that passes `value` to the `wrapper` function as its - * first argument. Additional arguments passed to the function are appended - * to those passed to the `wrapper` function. The `wrapper` is executed with - * the `this` binding of the created function. + * This method is like `_.tap` except that it returns the result of `interceptor`. * * @static * @memberOf _ - * @category Functions - * @param {Mixed} value The value to wrap. - * @param {Function} wrapper The wrapper function. - * @returns {Function} Returns the new function. + * @category Chain + * @param {*} value The value to provide to `interceptor`. + * @param {Function} interceptor The function to invoke. + * @param {*} [thisArg] The `this` binding of `interceptor`. + * @returns {*} Returns the result of `interceptor`. * @example * - * var hello = function(name) { return 'hello ' + name; }; - * hello = _.wrap(hello, function(func) { - * return 'before, ' + func('moe') + ', after'; - * }); - * hello(); - * // => 'before, hello moe, after' + * _(' abc ') + * .chain() + * .trim() + * .thru(function(value) { + * return [value]; + * }) + * .value(); + * // => ['abc'] */ - function wrap(value, wrapper) { - return function() { - var args = [value]; - push.apply(args, arguments); - return wrapper.apply(this, args); - }; + function thru(value, interceptor, thisArg) { + return interceptor.call(thisArg, value); } - /*--------------------------------------------------------------------------*/ - /** - * Converts the characters `&`, `<`, `>`, `"`, and `'` in `string` to their - * corresponding HTML entities. + * Enables explicit method chaining on the wrapper object. * - * @static + * @name chain * @memberOf _ - * @category Utilities - * @param {String} string The string to escape. - * @returns {String} Returns the escaped string. + * @category Chain + * @returns {Object} Returns the new `lodash` wrapper instance. * @example * - * _.escape('Moe, Larry & Curly'); - * // => 'Moe, Larry & Curly' + * var users = [ + * { 'user': 'barney', 'age': 36 }, + * { 'user': 'fred', 'age': 40 } + * ]; + * + * // without explicit chaining + * _(users).first(); + * // => { 'user': 'barney', 'age': 36 } + * + * // with explicit chaining + * _(users).chain() + * .first() + * .pick('user') + * .value(); + * // => { 'user': 'barney' } */ - function escape(string) { - return string == null ? '' : (string + '').replace(reUnescapedHtml, escapeHtmlChar); + function wrapperChain() { + return chain(this); } /** - * This function returns the first argument passed to it. + * Executes the chained sequence and returns the wrapped result. * - * @static + * @name commit * @memberOf _ - * @category Utilities - * @param {Mixed} value Any value. - * @returns {Mixed} Returns `value`. + * @category Chain + * @returns {Object} Returns the new `lodash` wrapper instance. * @example * - * var moe = { 'name': 'moe' }; - * moe === _.identity(moe); - * // => true + * var array = [1, 2]; + * var wrapper = _(array).push(3); + * + * console.log(array); + * // => [1, 2] + * + * wrapper = wrapper.commit(); + * console.log(array); + * // => [1, 2, 3] + * + * wrapper.last(); + * // => 3 + * + * console.log(array); + * // => [1, 2, 3] */ - function identity(value) { - return value; + function wrapperCommit() { + return new LodashWrapper(this.value(), this.__chain__); } /** - * Adds functions properties of `object` to the `lodash` function and chainable - * wrapper. + * Creates a clone of the chained sequence planting `value` as the wrapped value. * - * @static + * @name plant * @memberOf _ - * @category Utilities - * @param {Object} object The object of function properties to add to `lodash`. + * @category Chain + * @returns {Object} Returns the new `lodash` wrapper instance. * @example * - * _.mixin({ - * 'capitalize': function(string) { - * return string.charAt(0).toUpperCase() + string.slice(1).toLowerCase(); - * } + * var array = [1, 2]; + * var wrapper = _(array).map(function(value) { + * return Math.pow(value, 2); * }); * - * _.capitalize('larry'); - * // => 'Larry' + * var other = [3, 4]; + * var otherWrapper = wrapper.plant(other); * - * _('curly').capitalize(); - * // => 'Curly' + * otherWrapper.value(); + * // => [9, 16] + * + * wrapper.value(); + * // => [1, 4] */ - function mixin(object) { - forEach(functions(object), function(methodName) { - var func = lodash[methodName] = object[methodName]; - - lodash.prototype[methodName] = function() { - var args = [this.__wrapped__]; - push.apply(args, arguments); + function wrapperPlant(value) { + var result, + parent = this; - var result = func.apply(lodash, args); - return new lodash(result); - }; - }); + while (parent instanceof baseLodash) { + var clone = wrapperClone(parent); + if (result) { + previous.__wrapped__ = clone; + } else { + result = clone; + } + var previous = clone; + parent = parent.__wrapped__; + } + previous.__wrapped__ = value; + return result; } /** - * Reverts the '_' variable to its previous value and returns a reference to - * the `lodash` function. + * Reverses the wrapped array so the first element becomes the last, the + * second element becomes the second to last, and so on. * - * @static + * **Note:** This method mutates the wrapped array. + * + * @name reverse * @memberOf _ - * @category Utilities - * @returns {Function} Returns the `lodash` function. + * @category Chain + * @returns {Object} Returns the new reversed `lodash` wrapper instance. * @example * - * var lodash = _.noConflict(); + * var array = [1, 2, 3]; + * + * _(array).reverse().value() + * // => [3, 2, 1] + * + * console.log(array); + * // => [3, 2, 1] */ - function noConflict() { - window._ = oldDash; - return this; + function wrapperReverse() { + var value = this.__wrapped__; + if (value instanceof LazyWrapper) { + if (this.__actions__.length) { + value = new LazyWrapper(this); + } + return new LodashWrapper(value.reverse(), this.__chain__); + } + return this.thru(function(value) { + return value.reverse(); + }); } /** - * Produces a random number between `min` and `max` (inclusive). If only one - * argument is passed, a number between `0` and the given number will be returned. + * Produces the result of coercing the unwrapped value to a string. * - * @static + * @name toString * @memberOf _ - * @category Utilities - * @param {Number} [min=0] The minimum possible value. - * @param {Number} [max=1] The maximum possible value. - * @returns {Number} Returns a random number. + * @category Chain + * @returns {string} Returns the coerced string value. * @example * - * _.random(0, 5); - * // => a number between 1 and 5 - * - * _.random(5); - * // => also a number between 1 and 5 + * _([1, 2, 3]).toString(); + * // => '1,2,3' */ - function random(min, max) { - if (min == null && max == null) { - max = 1; - } - min = +min || 0; - if (max == null) { - max = min; - min = 0; - } - return min + floor(nativeRandom() * ((+max || 0) - min + 1)); + function wrapperToString() { + return (this.value() + ''); } /** - * Resolves the value of `property` on `object`. If `property` is a function - * it will be invoked and its result returned, else the property value is - * returned. If `object` is falsey, then `null` is returned. + * Executes the chained sequence to extract the unwrapped value. * - * @static + * @name value * @memberOf _ - * @category Utilities - * @param {Object} object The object to inspect. - * @param {String} property The property to get the value of. - * @returns {Mixed} Returns the resolved value. + * @alias run, toJSON, valueOf + * @category Chain + * @returns {*} Returns the resolved unwrapped value. * @example * - * var object = { - * 'cheese': 'crumpets', - * 'stuff': function() { - * return 'nonsense'; - * } - * }; - * - * _.result(object, 'cheese'); - * // => 'crumpets' - * - * _.result(object, 'stuff'); - * // => 'nonsense' + * _([1, 2, 3]).value(); + * // => [1, 2, 3] */ - function result(object, property) { - // based on Backbone's private `getValue` function - // https://github.com/documentcloud/backbone/blob/0.9.2/backbone.js#L1419-1424 - var value = object ? object[property] : null; - return isFunction(value) ? object[property]() : value; + function wrapperValue() { + return baseWrapperValue(this.__wrapped__, this.__actions__); } + /*------------------------------------------------------------------------*/ + /** - * A micro-templating method that handles arbitrary delimiters, preserves - * whitespace, and correctly escapes quotes within interpolated code. + * Checks if `predicate` returns truthy for **all** elements of `collection`. + * The predicate is bound to `thisArg` and invoked with three arguments: + * (value, index|key, collection). + * + * If a property name is provided for `predicate` the created `_.property` + * style callback returns the property value of the given element. * - * Note: In the development build `_.template` utilizes sourceURLs for easier - * debugging. See http://www.html5rocks.com/en/tutorials/developertools/sourcemaps/#toc-sourceurl + * If a value is also provided for `thisArg` the created `_.matchesProperty` + * style callback returns `true` for elements that have a matching property + * value, else `false`. * - * Note: Lo-Dash may be used in Chrome extensions by either creating a `lodash csp` - * build and avoiding `_.template` use, or loading Lo-Dash in a sandboxed page. - * See http://developer.chrome.com/trunk/extensions/sandboxingEval.html + * If an object is provided for `predicate` the created `_.matches` style + * callback returns `true` for elements that have the properties of the given + * object, else `false`. * * @static * @memberOf _ - * @category Utilities - * @param {String} text The template text. - * @param {Obect} data The data object used to populate the text. - * @param {Object} options The options object. - * escape - The "escape" delimiter regexp. - * evaluate - The "evaluate" delimiter regexp. - * interpolate - The "interpolate" delimiter regexp. - * sourceURL - The sourceURL of the template's compiled source. - * variable - The data object variable name. - * - * @returns {Function|String} Returns a compiled function when no `data` object - * is given, else it returns the interpolated text. + * @alias all + * @category Collection + * @param {Array|Object|string} collection The collection to iterate over. + * @param {Function|Object|string} [predicate=_.identity] The function invoked + * per iteration. + * @param {*} [thisArg] The `this` binding of `predicate`. + * @returns {boolean} Returns `true` if all elements pass the predicate check, + * else `false`. * @example * - * // using a compiled template - * var compiled = _.template('hello <%= name %>'); - * compiled({ 'name': 'moe' }); - * // => 'hello moe' - * - * var list = '<% _.forEach(people, function(name) { %>
  • <%= name %>
    • <% }); %>'; - * _.template(list, { 'people': ['moe', 'larry', 'curly'] }); - * // => '
  • moe
  • larry
  • curly
    • ' - * - * // using the "escape" delimiter to escape HTML in data property values - * _.template('<%- value %>', { 'value': '