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underscore - npm Package Compare versions
Comparing version 1.3.3 to 1.4.0
| { | ||
| "name" : "underscore", | ||
| "description" : "JavaScript's functional programming helper library.", | ||
| "homepage" : "http://documentcloud.github.com/underscore/", | ||
| "homepage" : "http://underscorejs.org", | ||
| "keywords" : ["util", "functional", "server", "client", "browser"], | ||
@@ -9,3 +9,3 @@ "author" : "Jeremy Ashkenas <jeremy@documentcloud.org>", | ||
| "main" : "underscore.js", | ||
| "version" : "1.3.3" | ||
| "version" : "1.4.0" | ||
| } |
@@ -1,19 +0,19 @@ | ||
| __ | ||
| /\ \ __ | ||
| __ __ ___ \_\ \ __ _ __ ____ ___ ___ _ __ __ /\_\ ____ | ||
| /\ \/\ \ /' _ `\ /'_ \ /'__`\/\ __\/ ,__\ / ___\ / __`\/\ __\/'__`\ \/\ \ /',__\ | ||
| __ | ||
| /\ \ __ | ||
| __ __ ___ \_\ \ __ _ __ ____ ___ ___ _ __ __ /\_\ ____ | ||
| /\ \/\ \ /' _ `\ /'_ \ /'__`\/\ __\/ ,__\ / ___\ / __`\/\ __\/'__`\ \/\ \ /',__\ | ||
| \ \ \_\ \/\ \/\ \/\ \ \ \/\ __/\ \ \//\__, `\/\ \__//\ \ \ \ \ \//\ __/ __ \ \ \/\__, `\ | ||
| \ \____/\ \_\ \_\ \___,_\ \____\\ \_\\/\____/\ \____\ \____/\ \_\\ \____\/\_\ _\ \ \/\____/ | ||
| \/___/ \/_/\/_/\/__,_ /\/____/ \/_/ \/___/ \/____/\/___/ \/_/ \/____/\/_//\ \_\ \/___/ | ||
| \ \____/ | ||
| \/___/ \/_/\/_/\/__,_ /\/____/ \/_/ \/___/ \/____/\/___/ \/_/ \/____/\/_//\ \_\ \/___/ | ||
| \ \____/ | ||
| \/___/ | ||
| Underscore.js is a utility-belt library for JavaScript that provides | ||
| support for the usual functional suspects (each, map, reduce, filter...) | ||
| Underscore.js is a utility-belt library for JavaScript that provides | ||
| support for the usual functional suspects (each, map, reduce, filter...) | ||
| without extending any core JavaScript objects. | ||
| For Docs, License, Tests, and pre-packed downloads, see: | ||
| http://documentcloud.github.com/underscore/ | ||
| http://underscorejs.org | ||
| Many thanks to our contributors: | ||
| https://github.com/documentcloud/underscore/contributors |
@@ -1,32 +0,5 @@ | ||
| // Underscore.js 1.3.3 | ||
| // (c) 2009-2012 Jeremy Ashkenas, DocumentCloud Inc. | ||
| // Underscore is freely distributable under the MIT license. | ||
| // Portions of Underscore are inspired or borrowed from Prototype, | ||
| // Oliver Steele's Functional, and John Resig's Micro-Templating. | ||
| // For all details and documentation: | ||
| // http://documentcloud.github.com/underscore | ||
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| // Underscore.js 1.4.0 | ||
| // http://underscorejs.org | ||
| // (c) 2009-2012 Jeremy Ashkenas, DocumentCloud Inc. | ||
| // Underscore may be freely distributed under the MIT license. | ||
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@@ -1,8 +0,5 @@ | ||
| // Underscore.js 1.3.3 | ||
| // Underscore.js 1.4.0 | ||
| // http://underscorejs.org | ||
| // (c) 2009-2012 Jeremy Ashkenas, DocumentCloud Inc. | ||
| // Underscore is freely distributable under the MIT license. | ||
| // Portions of Underscore are inspired or borrowed from Prototype, | ||
| // Oliver Steele's Functional, and John Resig's Micro-Templating. | ||
| // For all details and documentation: | ||
| // http://documentcloud.github.com/underscore | ||
| // Underscore may be freely distributed under the MIT license. | ||
@@ -27,3 +24,5 @@ (function() { | ||
| // Create quick reference variables for speed access to core prototypes. | ||
| var slice = ArrayProto.slice, | ||
| var push = ArrayProto.push, | ||
| slice = ArrayProto.slice, | ||
| concat = ArrayProto.concat, | ||
| unshift = ArrayProto.unshift, | ||
@@ -50,3 +49,7 @@ toString = ObjProto.toString, | ||
| // Create a safe reference to the Underscore object for use below. | ||
| var _ = function(obj) { return new wrapper(obj); }; | ||
| var _ = function(obj) { | ||
| if (obj instanceof _) return obj; | ||
| if (!(this instanceof _)) return new _(obj); | ||
| this._wrapped = obj; | ||
| }; | ||
@@ -67,3 +70,3 @@ // Export the Underscore object for **Node.js**, with | ||
| // Current version. | ||
| _.VERSION = '1.3.3'; | ||
| _.VERSION = '1.4.0'; | ||
@@ -77,3 +80,2 @@ // Collection Functions | ||
| var each = _.each = _.forEach = function(obj, iterator, context) { | ||
| if (obj == null) return; | ||
| if (nativeForEach && obj.forEach === nativeForEach) { | ||
@@ -83,3 +85,3 @@ obj.forEach(iterator, context); | ||
| for (var i = 0, l = obj.length; i < l; i++) { | ||
| if (i in obj && iterator.call(context, obj[i], i, obj) === breaker) return; | ||
| if (iterator.call(context, obj[i], i, obj) === breaker) return; | ||
| } | ||
@@ -99,3 +101,2 @@ } else { | ||
| var results = []; | ||
| if (obj == null) return results; | ||
| if (nativeMap && obj.map === nativeMap) return obj.map(iterator, context); | ||
@@ -105,3 +106,2 @@ each(obj, function(value, index, list) { | ||
| }); | ||
| if (obj.length === +obj.length) results.length = obj.length; | ||
| return results; | ||
@@ -114,3 +114,2 @@ }; | ||
| var initial = arguments.length > 2; | ||
| if (obj == null) obj = []; | ||
| if (nativeReduce && obj.reduce === nativeReduce) { | ||
@@ -136,10 +135,22 @@ if (context) iterator = _.bind(iterator, context); | ||
| var initial = arguments.length > 2; | ||
| if (obj == null) obj = []; | ||
| if (nativeReduceRight && obj.reduceRight === nativeReduceRight) { | ||
| if (context) iterator = _.bind(iterator, context); | ||
| return initial ? obj.reduceRight(iterator, memo) : obj.reduceRight(iterator); | ||
| return arguments.length > 2 ? obj.reduceRight(iterator, memo) : obj.reduceRight(iterator); | ||
| } | ||
| var reversed = _.toArray(obj).reverse(); | ||
| if (context && !initial) iterator = _.bind(iterator, context); | ||
| return initial ? _.reduce(reversed, iterator, memo, context) : _.reduce(reversed, iterator); | ||
| var length = obj.length; | ||
| if (length !== +length) { | ||
| var keys = _.keys(obj); | ||
| length = keys.length; | ||
| } | ||
| each(obj, function(value, index, list) { | ||
| index = keys ? keys[--length] : --length; | ||
| if (!initial) { | ||
| memo = obj[index]; | ||
| initial = true; | ||
| } else { | ||
| memo = iterator.call(context, memo, obj[index], index, list); | ||
| } | ||
| }); | ||
| if (!initial) throw new TypeError('Reduce of empty array with no initial value'); | ||
| return memo; | ||
| }; | ||
@@ -164,3 +175,2 @@ | ||
| var results = []; | ||
| if (obj == null) return results; | ||
| if (nativeFilter && obj.filter === nativeFilter) return obj.filter(iterator, context); | ||
@@ -176,3 +186,2 @@ each(obj, function(value, index, list) { | ||
| var results = []; | ||
| if (obj == null) return results; | ||
| each(obj, function(value, index, list) { | ||
@@ -188,4 +197,4 @@ if (!iterator.call(context, value, index, list)) results[results.length] = value; | ||
| _.every = _.all = function(obj, iterator, context) { | ||
| iterator || (iterator = _.identity); | ||
| var result = true; | ||
| if (obj == null) return result; | ||
| if (nativeEvery && obj.every === nativeEvery) return obj.every(iterator, context); | ||
@@ -204,3 +213,2 @@ each(obj, function(value, index, list) { | ||
| var result = false; | ||
| if (obj == null) return result; | ||
| if (nativeSome && obj.some === nativeSome) return obj.some(iterator, context); | ||
@@ -213,7 +221,6 @@ each(obj, function(value, index, list) { | ||
| // Determine if a given value is included in the array or object using `===`. | ||
| // Aliased as `contains`. | ||
| _.include = _.contains = function(obj, target) { | ||
| // Determine if the array or object contains a given value (using `===`). | ||
| // Aliased as `include`. | ||
| _.contains = _.include = function(obj, target) { | ||
| var found = false; | ||
| if (obj == null) return found; | ||
| if (nativeIndexOf && obj.indexOf === nativeIndexOf) return obj.indexOf(target) != -1; | ||
@@ -230,3 +237,3 @@ found = any(obj, function(value) { | ||
| return _.map(obj, function(value) { | ||
| return (_.isFunction(method) ? method || value : value[method]).apply(value, args); | ||
| return (_.isFunction(method) ? method : value[method]).apply(value, args); | ||
| }); | ||
@@ -240,5 +247,21 @@ }; | ||
| // Convenience version of a common use case of `filter`: selecting only objects | ||
| // with specific `key:value` pairs. | ||
| _.where = function(obj, attrs) { | ||
| if (_.isEmpty(attrs)) return []; | ||
| return _.filter(obj, function(value) { | ||
| for (var key in attrs) { | ||
| if (attrs[key] !== value[key]) return false; | ||
| } | ||
| return true; | ||
| }); | ||
| }; | ||
| // Return the maximum element or (element-based computation). | ||
| // Can't optimize arrays of integers longer than 65,535 elements. | ||
| // See: https://bugs.webkit.org/show_bug.cgi?id=80797 | ||
| _.max = function(obj, iterator, context) { | ||
| if (!iterator && _.isArray(obj) && obj[0] === +obj[0]) return Math.max.apply(Math, obj); | ||
| if (!iterator && _.isArray(obj) && obj[0] === +obj[0] && obj.length < 65535) { | ||
| return Math.max.apply(Math, obj); | ||
| } | ||
| if (!iterator && _.isEmpty(obj)) return -Infinity; | ||
@@ -255,3 +278,5 @@ var result = {computed : -Infinity}; | ||
| _.min = function(obj, iterator, context) { | ||
| if (!iterator && _.isArray(obj) && obj[0] === +obj[0]) return Math.min.apply(Math, obj); | ||
| if (!iterator && _.isArray(obj) && obj[0] === +obj[0] && obj.length < 65535) { | ||
| return Math.min.apply(Math, obj); | ||
| } | ||
| if (!iterator && _.isEmpty(obj)) return Infinity; | ||
@@ -268,6 +293,8 @@ var result = {computed : Infinity}; | ||
| _.shuffle = function(obj) { | ||
| var shuffled = [], rand; | ||
| each(obj, function(value, index, list) { | ||
| rand = Math.floor(Math.random() * (index + 1)); | ||
| shuffled[index] = shuffled[rand]; | ||
| var rand; | ||
| var index = 0; | ||
| var shuffled = []; | ||
| each(obj, function(value) { | ||
| rand = _.random(index++); | ||
| shuffled[index - 1] = shuffled[rand]; | ||
| shuffled[rand] = value; | ||
@@ -278,26 +305,34 @@ }); | ||
| // An internal function to generate lookup iterators. | ||
| var lookupIterator = function(value) { | ||
| return _.isFunction(value) ? value : function(obj){ return obj[value]; }; | ||
| }; | ||
| // Sort the object's values by a criterion produced by an iterator. | ||
| _.sortBy = function(obj, val, context) { | ||
| var iterator = _.isFunction(val) ? val : function(obj) { return obj[val]; }; | ||
| _.sortBy = function(obj, value, context) { | ||
| var iterator = lookupIterator(value); | ||
| return _.pluck(_.map(obj, function(value, index, list) { | ||
| return { | ||
| value : value, | ||
| index : index, | ||
| criteria : iterator.call(context, value, index, list) | ||
| }; | ||
| }).sort(function(left, right) { | ||
| var a = left.criteria, b = right.criteria; | ||
| if (a === void 0) return 1; | ||
| if (b === void 0) return -1; | ||
| return a < b ? -1 : a > b ? 1 : 0; | ||
| var a = left.criteria; | ||
| var b = right.criteria; | ||
| if (a !== b) { | ||
| if (a > b || a === void 0) return 1; | ||
| if (a < b || b === void 0) return -1; | ||
| } | ||
| return left.index < right.index ? -1 : 1; | ||
| }), 'value'); | ||
| }; | ||
| // Groups the object's values by a criterion. Pass either a string attribute | ||
| // to group by, or a function that returns the criterion. | ||
| _.groupBy = function(obj, val) { | ||
| // An internal function used for aggregate "group by" operations. | ||
| var group = function(obj, value, context, behavior) { | ||
| var result = {}; | ||
| var iterator = _.isFunction(val) ? val : function(obj) { return obj[val]; }; | ||
| var iterator = lookupIterator(value); | ||
| each(obj, function(value, index) { | ||
| var key = iterator(value, index); | ||
| (result[key] || (result[key] = [])).push(value); | ||
| var key = iterator.call(context, value, index, obj); | ||
| behavior(result, key, value); | ||
| }); | ||
@@ -307,10 +342,29 @@ return result; | ||
| // Use a comparator function to figure out at what index an object should | ||
| // be inserted so as to maintain order. Uses binary search. | ||
| _.sortedIndex = function(array, obj, iterator) { | ||
| iterator || (iterator = _.identity); | ||
| // Groups the object's values by a criterion. Pass either a string attribute | ||
| // to group by, or a function that returns the criterion. | ||
| _.groupBy = function(obj, value, context) { | ||
| return group(obj, value, context, function(result, key, value) { | ||
| (_.has(result, key) ? result[key] : (result[key] = [])).push(value); | ||
| }); | ||
| }; | ||
| // Counts instances of an object that group by a certain criterion. Pass | ||
| // either a string attribute to count by, or a function that returns the | ||
| // criterion. | ||
| _.countBy = function(obj, value, context) { | ||
| return group(obj, value, context, function(result, key, value) { | ||
| if (!_.has(result, key)) result[key] = 0; | ||
| result[key]++; | ||
| }); | ||
| }; | ||
| // Use a comparator function to figure out the smallest index at which | ||
| // an object should be inserted so as to maintain order. Uses binary search. | ||
| _.sortedIndex = function(array, obj, iterator, context) { | ||
| iterator = iterator == null ? _.identity : lookupIterator(iterator); | ||
| var value = iterator.call(context, obj); | ||
| var low = 0, high = array.length; | ||
| while (low < high) { | ||
| var mid = (low + high) >> 1; | ||
| iterator(array[mid]) < iterator(obj) ? low = mid + 1 : high = mid; | ||
| var mid = (low + high) >>> 1; | ||
| iterator.call(context, array[mid]) < value ? low = mid + 1 : high = mid; | ||
| } | ||
@@ -322,6 +376,4 @@ return low; | ||
| _.toArray = function(obj) { | ||
| if (!obj) return []; | ||
| if (_.isArray(obj)) return slice.call(obj); | ||
| if (_.isArguments(obj)) return slice.call(obj); | ||
| if (obj.toArray && _.isFunction(obj.toArray)) return obj.toArray(); | ||
| if (!obj) return []; | ||
| if (obj.length === +obj.length) return slice.call(obj); | ||
| return _.values(obj); | ||
@@ -332,3 +384,3 @@ }; | ||
| _.size = function(obj) { | ||
| return _.isArray(obj) ? obj.length : _.keys(obj).length; | ||
| return (obj.length === +obj.length) ? obj.length : _.keys(obj).length; | ||
| }; | ||
@@ -346,3 +398,3 @@ | ||
| // Returns everything but the last entry of the array. Especcialy useful on | ||
| // Returns everything but the last entry of the array. Especially useful on | ||
| // the arguments object. Passing **n** will return all the values in | ||
@@ -365,8 +417,8 @@ // the array, excluding the last N. The **guard** check allows it to work with | ||
| // Returns everything but the first entry of the array. Aliased as `tail`. | ||
| // Especially useful on the arguments object. Passing an **index** will return | ||
| // the rest of the values in the array from that index onward. The **guard** | ||
| // Returns everything but the first entry of the array. Aliased as `tail` and `drop`. | ||
| // Especially useful on the arguments object. Passing an **n** will return | ||
| // the rest N values in the array. The **guard** | ||
| // check allows it to work with `_.map`. | ||
| _.rest = _.tail = function(array, index, guard) { | ||
| return slice.call(array, (index == null) || guard ? 1 : index); | ||
| _.rest = _.tail = _.drop = function(array, n, guard) { | ||
| return slice.call(array, (n == null) || guard ? 1 : n); | ||
| }; | ||
@@ -379,9 +431,17 @@ | ||
| // Internal implementation of a recursive `flatten` function. | ||
| var flatten = function(input, shallow, output) { | ||
| each(input, function(value) { | ||
| if (_.isArray(value)) { | ||
| shallow ? push.apply(output, value) : flatten(value, shallow, output); | ||
| } else { | ||
| output.push(value); | ||
| } | ||
| }); | ||
| return output; | ||
| }; | ||
| // Return a completely flattened version of an array. | ||
| _.flatten = function(array, shallow) { | ||
| return _.reduce(array, function(memo, value) { | ||
| if (_.isArray(value)) return memo.concat(shallow ? value : _.flatten(value)); | ||
| memo[memo.length] = value; | ||
| return memo; | ||
| }, []); | ||
| return flatten(array, shallow, []); | ||
| }; | ||
@@ -397,14 +457,12 @@ | ||
| // Aliased as `unique`. | ||
| _.uniq = _.unique = function(array, isSorted, iterator) { | ||
| var initial = iterator ? _.map(array, iterator) : array; | ||
| _.uniq = _.unique = function(array, isSorted, iterator, context) { | ||
| var initial = iterator ? _.map(array, iterator, context) : array; | ||
| var results = []; | ||
| // The `isSorted` flag is irrelevant if the array only contains two elements. | ||
| if (array.length < 3) isSorted = true; | ||
| _.reduce(initial, function (memo, value, index) { | ||
| if (isSorted ? _.last(memo) !== value || !memo.length : !_.include(memo, value)) { | ||
| memo.push(value); | ||
| var seen = []; | ||
| each(initial, function(value, index) { | ||
| if (isSorted ? (!index || seen[seen.length - 1] !== value) : !_.contains(seen, value)) { | ||
| seen.push(value); | ||
| results.push(array[index]); | ||
| } | ||
| return memo; | ||
| }, []); | ||
| }); | ||
| return results; | ||
@@ -416,8 +474,8 @@ }; | ||
| _.union = function() { | ||
| return _.uniq(_.flatten(arguments, true)); | ||
| return _.uniq(concat.apply(ArrayProto, arguments)); | ||
| }; | ||
| // Produce an array that contains every item shared between all the | ||
| // passed-in arrays. (Aliased as "intersect" for back-compat.) | ||
| _.intersection = _.intersect = function(array) { | ||
| // passed-in arrays. | ||
| _.intersection = function(array) { | ||
| var rest = slice.call(arguments, 1); | ||
@@ -434,4 +492,4 @@ return _.filter(_.uniq(array), function(item) { | ||
| _.difference = function(array) { | ||
| var rest = _.flatten(slice.call(arguments, 1), true); | ||
| return _.filter(array, function(value){ return !_.include(rest, value); }); | ||
| var rest = concat.apply(ArrayProto, slice.call(arguments, 1)); | ||
| return _.filter(array, function(value){ return !_.contains(rest, value); }); | ||
| }; | ||
@@ -445,6 +503,23 @@ | ||
| var results = new Array(length); | ||
| for (var i = 0; i < length; i++) results[i] = _.pluck(args, "" + i); | ||
| for (var i = 0; i < length; i++) { | ||
| results[i] = _.pluck(args, "" + i); | ||
| } | ||
| return results; | ||
| }; | ||
| // Converts lists into objects. Pass either a single array of `[key, value]` | ||
| // pairs, or two parallel arrays of the same length -- one of keys, and one of | ||
| // the corresponding values. | ||
| _.object = function(list, values) { | ||
| var result = {}; | ||
| for (var i = 0, l = list.length; i < l; i++) { | ||
| if (values) { | ||
| result[list[i]] = values[i]; | ||
| } else { | ||
| result[list[i][0]] = list[i][1]; | ||
| } | ||
| } | ||
| return result; | ||
| }; | ||
| // If the browser doesn't supply us with indexOf (I'm looking at you, **MSIE**), | ||
@@ -457,10 +532,13 @@ // we need this function. Return the position of the first occurrence of an | ||
| _.indexOf = function(array, item, isSorted) { | ||
| if (array == null) return -1; | ||
| var i, l; | ||
| var i = 0, l = array.length; | ||
| if (isSorted) { | ||
| i = _.sortedIndex(array, item); | ||
| return array[i] === item ? i : -1; | ||
| if (typeof isSorted == 'number') { | ||
| i = (isSorted < 0 ? Math.max(0, l + isSorted) : isSorted); | ||
| } else { | ||
| i = _.sortedIndex(array, item); | ||
| return array[i] === item ? i : -1; | ||
| } | ||
| } | ||
| if (nativeIndexOf && array.indexOf === nativeIndexOf) return array.indexOf(item); | ||
| for (i = 0, l = array.length; i < l; i++) if (i in array && array[i] === item) return i; | ||
| if (nativeIndexOf && array.indexOf === nativeIndexOf) return array.indexOf(item, isSorted); | ||
| for (; i < l; i++) if (array[i] === item) return i; | ||
| return -1; | ||
@@ -470,7 +548,6 @@ }; | ||
| // Delegates to **ECMAScript 5**'s native `lastIndexOf` if available. | ||
| _.lastIndexOf = function(array, item) { | ||
| if (array == null) return -1; | ||
| if (nativeLastIndexOf && array.lastIndexOf === nativeLastIndexOf) return array.lastIndexOf(item); | ||
| var i = array.length; | ||
| while (i--) if (i in array && array[i] === item) return i; | ||
| _.lastIndexOf = function(array, item, fromIndex) { | ||
| if (nativeLastIndexOf && array.lastIndexOf === nativeLastIndexOf) return array.lastIndexOf(item, fromIndex); | ||
| var i = (fromIndex != null ? fromIndex : array.length); | ||
| while (i--) if (array[i] === item) return i; | ||
| return -1; | ||
@@ -567,3 +644,5 @@ }; | ||
| timeout = null; | ||
| if (more) func.apply(context, args); | ||
| if (more) { | ||
| result = func.apply(context, args); | ||
| } | ||
| whenDone(); | ||
@@ -575,6 +654,6 @@ }; | ||
| } else { | ||
| throttling = true; | ||
| result = func.apply(context, args); | ||
| } | ||
| whenDone(); | ||
| throttling = true; | ||
| return result; | ||
@@ -589,3 +668,3 @@ }; | ||
| _.debounce = function(func, wait, immediate) { | ||
| var timeout; | ||
| var timeout, result; | ||
| return function() { | ||
@@ -595,7 +674,9 @@ var context = this, args = arguments; | ||
| timeout = null; | ||
| if (!immediate) func.apply(context, args); | ||
| if (!immediate) result = func.apply(context, args); | ||
| }; | ||
| if (immediate && !timeout) func.apply(context, args); | ||
| var callNow = immediate && !timeout; | ||
| clearTimeout(timeout); | ||
| timeout = setTimeout(later, wait); | ||
| if (callNow) result = func.apply(context, args); | ||
| return result; | ||
| }; | ||
@@ -611,3 +692,5 @@ }; | ||
| ran = true; | ||
| return memo = func.apply(this, arguments); | ||
| memo = func.apply(this, arguments); | ||
| func = null; | ||
| return memo; | ||
| }; | ||
@@ -621,3 +704,4 @@ }; | ||
| return function() { | ||
| var args = [func].concat(slice.call(arguments, 0)); | ||
| var args = [func]; | ||
| push.apply(args, arguments); | ||
| return wrapper.apply(this, args); | ||
@@ -644,3 +728,5 @@ }; | ||
| return function() { | ||
| if (--times < 1) { return func.apply(this, arguments); } | ||
| if (--times < 1) { | ||
| return func.apply(this, arguments); | ||
| } | ||
| }; | ||
@@ -663,5 +749,21 @@ }; | ||
| _.values = function(obj) { | ||
| return _.map(obj, _.identity); | ||
| var values = []; | ||
| for (var key in obj) if (_.has(obj, key)) values.push(obj[key]); | ||
| return values; | ||
| }; | ||
| // Convert an object into a list of `[key, value]` pairs. | ||
| _.pairs = function(obj) { | ||
| var pairs = []; | ||
| for (var key in obj) if (_.has(obj, key)) pairs.push([key, obj[key]]); | ||
| return pairs; | ||
| }; | ||
| // Invert the keys and values of an object. The values must be serializable. | ||
| _.invert = function(obj) { | ||
| var result = {}; | ||
| for (var key in obj) if (_.has(obj, key)) result[obj[key]] = key; | ||
| return result; | ||
| }; | ||
| // Return a sorted list of the function names available on the object. | ||
@@ -689,9 +791,20 @@ // Aliased as `methods` | ||
| _.pick = function(obj) { | ||
| var result = {}; | ||
| each(_.flatten(slice.call(arguments, 1)), function(key) { | ||
| if (key in obj) result[key] = obj[key]; | ||
| var copy = {}; | ||
| var keys = concat.apply(ArrayProto, slice.call(arguments, 1)); | ||
| each(keys, function(key) { | ||
| if (key in obj) copy[key] = obj[key]; | ||
| }); | ||
| return result; | ||
| return copy; | ||
| }; | ||
| // Return a copy of the object without the blacklisted properties. | ||
| _.omit = function(obj) { | ||
| var copy = {}; | ||
| var keys = concat.apply(ArrayProto, slice.call(arguments, 1)); | ||
| for (var key in obj) { | ||
| if (!_.contains(keys, key)) copy[key] = obj[key]; | ||
| } | ||
| return copy; | ||
| }; | ||
| // Fill in a given object with default properties. | ||
@@ -721,4 +834,4 @@ _.defaults = function(obj) { | ||
| // Internal recursive comparison function. | ||
| function eq(a, b, stack) { | ||
| // Internal recursive comparison function for `isEqual`. | ||
| var eq = function(a, b, aStack, bStack) { | ||
| // Identical objects are equal. `0 === -0`, but they aren't identical. | ||
@@ -730,7 +843,4 @@ // See the Harmony `egal` proposal: http://wiki.ecmascript.org/doku.php?id=harmony:egal. | ||
| // Unwrap any wrapped objects. | ||
| if (a._chain) a = a._wrapped; | ||
| if (b._chain) b = b._wrapped; | ||
| // Invoke a custom `isEqual` method if one is provided. | ||
| if (a.isEqual && _.isFunction(a.isEqual)) return a.isEqual(b); | ||
| if (b.isEqual && _.isFunction(b.isEqual)) return b.isEqual(a); | ||
| if (a instanceof _) a = a._wrapped; | ||
| if (b instanceof _) b = b._wrapped; | ||
| // Compare `[[Class]]` names. | ||
@@ -765,10 +875,11 @@ var className = toString.call(a); | ||
| // structures is adapted from ES 5.1 section 15.12.3, abstract operation `JO`. | ||
| var length = stack.length; | ||
| var length = aStack.length; | ||
| while (length--) { | ||
| // Linear search. Performance is inversely proportional to the number of | ||
| // unique nested structures. | ||
| if (stack[length] == a) return true; | ||
| if (aStack[length] == a) return bStack[length] == b; | ||
| } | ||
| // Add the first object to the stack of traversed objects. | ||
| stack.push(a); | ||
| aStack.push(a); | ||
| bStack.push(b); | ||
| var size = 0, result = true; | ||
@@ -783,9 +894,13 @@ // Recursively compare objects and arrays. | ||
| while (size--) { | ||
| // Ensure commutative equality for sparse arrays. | ||
| if (!(result = size in a == size in b && eq(a[size], b[size], stack))) break; | ||
| if (!(result = eq(a[size], b[size], aStack, bStack))) break; | ||
| } | ||
| } | ||
| } else { | ||
| // Objects with different constructors are not equivalent. | ||
| if ('constructor' in a != 'constructor' in b || a.constructor != b.constructor) return false; | ||
| // Objects with different constructors are not equivalent, but `Object`s | ||
| // from different frames are. | ||
| var aCtor = a.constructor, bCtor = b.constructor; | ||
| if (aCtor !== bCtor && !(_.isFunction(aCtor) && (aCtor instanceof aCtor) && | ||
| _.isFunction(bCtor) && (bCtor instanceof bCtor))) { | ||
| return false; | ||
| } | ||
| // Deep compare objects. | ||
@@ -797,3 +912,3 @@ for (var key in a) { | ||
| // Deep compare each member. | ||
| if (!(result = _.has(b, key) && eq(a[key], b[key], stack))) break; | ||
| if (!(result = _.has(b, key) && eq(a[key], b[key], aStack, bStack))) break; | ||
| } | ||
@@ -810,9 +925,10 @@ } | ||
| // Remove the first object from the stack of traversed objects. | ||
| stack.pop(); | ||
| aStack.pop(); | ||
| bStack.pop(); | ||
| return result; | ||
| } | ||
| }; | ||
| // Perform a deep comparison to check if two objects are equal. | ||
| _.isEqual = function(a, b) { | ||
| return eq(a, b, []); | ||
| return eq(a, b, [], []); | ||
| }; | ||
@@ -831,3 +947,3 @@ | ||
| _.isElement = function(obj) { | ||
| return !!(obj && obj.nodeType == 1); | ||
| return !!(obj && obj.nodeType === 1); | ||
| }; | ||
@@ -846,6 +962,11 @@ | ||
| // Is a given variable an arguments object? | ||
| _.isArguments = function(obj) { | ||
| return toString.call(obj) == '[object Arguments]'; | ||
| }; | ||
| // Add some isType methods: isArguments, isFunction, isString, isNumber, isDate, isRegExp. | ||
| each(['Arguments', 'Function', 'String', 'Number', 'Date', 'RegExp'], function(name) { | ||
| _['is' + name] = function(obj) { | ||
| return toString.call(obj) == '[object ' + name + ']'; | ||
| }; | ||
| }); | ||
| // Define a fallback version of the method in browsers (ahem, IE), where | ||
| // there isn't any inspectable "Arguments" type. | ||
| if (!_.isArguments(arguments)) { | ||
@@ -857,17 +978,9 @@ _.isArguments = function(obj) { | ||
| // Is a given value a function? | ||
| _.isFunction = function(obj) { | ||
| return toString.call(obj) == '[object Function]'; | ||
| }; | ||
| // Optimize `isFunction` if appropriate. | ||
| if (typeof (/./) !== 'function') { | ||
| _.isFunction = function(obj) { | ||
| return typeof obj === 'function'; | ||
| }; | ||
| } | ||
| // Is a given value a string? | ||
| _.isString = function(obj) { | ||
| return toString.call(obj) == '[object String]'; | ||
| }; | ||
| // Is a given value a number? | ||
| _.isNumber = function(obj) { | ||
| return toString.call(obj) == '[object Number]'; | ||
| }; | ||
| // Is a given object a finite number? | ||
@@ -878,6 +991,5 @@ _.isFinite = function(obj) { | ||
| // Is the given value `NaN`? | ||
| // Is the given value `NaN`? (NaN is the only number which does not equal itself). | ||
| _.isNaN = function(obj) { | ||
| // `NaN` is the only value for which `===` is not reflexive. | ||
| return obj !== obj; | ||
| return _.isNumber(obj) && obj != +obj; | ||
| }; | ||
@@ -890,12 +1002,2 @@ | ||
| // Is a given value a date? | ||
| _.isDate = function(obj) { | ||
| return toString.call(obj) == '[object Date]'; | ||
| }; | ||
| // Is the given value a regular expression? | ||
| _.isRegExp = function(obj) { | ||
| return toString.call(obj) == '[object RegExp]'; | ||
| }; | ||
| // Is a given value equal to null? | ||
@@ -911,3 +1013,4 @@ _.isNull = function(obj) { | ||
| // Has own property? | ||
| // Shortcut function for checking if an object has a given property directly | ||
| // on itself (in other words, not on a prototype). | ||
| _.has = function(obj, key) { | ||
@@ -933,11 +1036,44 @@ return hasOwnProperty.call(obj, key); | ||
| // Run a function **n** times. | ||
| _.times = function (n, iterator, context) { | ||
| _.times = function(n, iterator, context) { | ||
| for (var i = 0; i < n; i++) iterator.call(context, i); | ||
| }; | ||
| // Escape a string for HTML interpolation. | ||
| _.escape = function(string) { | ||
| return (''+string).replace(/&/g, '&').replace(/</g, '<').replace(/>/g, '>').replace(/"/g, '"').replace(/'/g, ''').replace(/\//g,'/'); | ||
| // Return a random integer between min and max (inclusive). | ||
| _.random = function(min, max) { | ||
| if (max == null) { | ||
| max = min; | ||
| min = 0; | ||
| } | ||
| return min + (0 | Math.random() * (max - min + 1)); | ||
| }; | ||
| // List of HTML entities for escaping. | ||
| var entityMap = { | ||
| escape: { | ||
| '&': '&', | ||
| '<': '<', | ||
| '>': '>', | ||
| '"': '"', | ||
| "'": ''', | ||
| '/': '/' | ||
| } | ||
| }; | ||
| entityMap.unescape = _.invert(entityMap.escape); | ||
| // Regexes containing the keys and values listed immediately above. | ||
| var entityRegexes = { | ||
| escape: new RegExp('[' + _.keys(entityMap.escape).join('') + ']', 'g'), | ||
| unescape: new RegExp('(' + _.keys(entityMap.unescape).join('|') + ')', 'g') | ||
| }; | ||
| // Functions for escaping and unescaping strings to/from HTML interpolation. | ||
| _.each(['escape', 'unescape'], function(method) { | ||
| _[method] = function(string) { | ||
| if (string == null) return ''; | ||
| return ('' + string).replace(entityRegexes[method], function(match) { | ||
| return entityMap[method][match]; | ||
| }); | ||
| }; | ||
| }); | ||
| // If the value of the named property is a function then invoke it; | ||
@@ -951,7 +1087,11 @@ // otherwise, return it. | ||
| // Add your own custom functions to the Underscore object, ensuring that | ||
| // they're correctly added to the OOP wrapper as well. | ||
| // Add your own custom functions to the Underscore object. | ||
| _.mixin = function(obj) { | ||
| each(_.functions(obj), function(name){ | ||
| addToWrapper(name, _[name] = obj[name]); | ||
| var func = _[name] = obj[name]; | ||
| _.prototype[name] = function() { | ||
| var args = [this._wrapped]; | ||
| push.apply(args, arguments); | ||
| return result.call(this, func.apply(_, args)); | ||
| }; | ||
| }); | ||
@@ -979,3 +1119,3 @@ }; | ||
| // guaranteed not to match. | ||
| var noMatch = /.^/; | ||
| var noMatch = /(.)^/; | ||
@@ -985,23 +1125,13 @@ // Certain characters need to be escaped so that they can be put into a | ||
| var escapes = { | ||
| '\\': '\\', | ||
| "'": "'", | ||
| 'r': '\r', | ||
| 'n': '\n', | ||
| 't': '\t', | ||
| 'u2028': '\u2028', | ||
| 'u2029': '\u2029' | ||
| "'": "'", | ||
| '\\': '\\', | ||
| '\r': 'r', | ||
| '\n': 'n', | ||
| '\t': 't', | ||
| '\u2028': 'u2028', | ||
| '\u2029': 'u2029' | ||
| }; | ||
| for (var p in escapes) escapes[escapes[p]] = p; | ||
| var escaper = /\\|'|\r|\n|\t|\u2028|\u2029/g; | ||
| var unescaper = /\\(\\|'|r|n|t|u2028|u2029)/g; | ||
| // Within an interpolation, evaluation, or escaping, remove HTML escaping | ||
| // that had been previously added. | ||
| var unescape = function(code) { | ||
| return code.replace(unescaper, function(match, escape) { | ||
| return escapes[escape]; | ||
| }); | ||
| }; | ||
| // JavaScript micro-templating, similar to John Resig's implementation. | ||
@@ -1011,29 +1141,39 @@ // Underscore templating handles arbitrary delimiters, preserves whitespace, | ||
| _.template = function(text, data, settings) { | ||
| settings = _.defaults(settings || {}, _.templateSettings); | ||
| settings = _.defaults({}, settings, _.templateSettings); | ||
| // Compile the template source, taking care to escape characters that | ||
| // cannot be included in a string literal and then unescape them in code | ||
| // blocks. | ||
| var source = "__p+='" + text | ||
| .replace(escaper, function(match) { | ||
| return '\\' + escapes[match]; | ||
| }) | ||
| .replace(settings.escape || noMatch, function(match, code) { | ||
| return "'+\n_.escape(" + unescape(code) + ")+\n'"; | ||
| }) | ||
| .replace(settings.interpolate || noMatch, function(match, code) { | ||
| return "'+\n(" + unescape(code) + ")+\n'"; | ||
| }) | ||
| .replace(settings.evaluate || noMatch, function(match, code) { | ||
| return "';\n" + unescape(code) + "\n;__p+='"; | ||
| }) + "';\n"; | ||
| // Combine delimiters into one regular expression via alternation. | ||
| var matcher = new RegExp([ | ||
| (settings.escape || noMatch).source, | ||
| (settings.interpolate || noMatch).source, | ||
| (settings.evaluate || noMatch).source | ||
| ].join('|') + '|$', 'g'); | ||
| // Compile the template source, escaping string literals appropriately. | ||
| var index = 0; | ||
| var source = "__p+='"; | ||
| text.replace(matcher, function(match, escape, interpolate, evaluate, offset) { | ||
| source += text.slice(index, offset) | ||
| .replace(escaper, function(match) { return '\\' + escapes[match]; }); | ||
| source += | ||
| escape ? "'+\n((__t=(" + escape + "))==null?'':_.escape(__t))+\n'" : | ||
| interpolate ? "'+\n((__t=(" + interpolate + "))==null?'':__t)+\n'" : | ||
| evaluate ? "';\n" + evaluate + "\n__p+='" : ''; | ||
| index = offset + match.length; | ||
| }); | ||
| source += "';\n"; | ||
| // If a variable is not specified, place data values in local scope. | ||
| if (!settings.variable) source = 'with(obj||{}){\n' + source + '}\n'; | ||
| source = "var __p='';" + | ||
| "var print=function(){__p+=Array.prototype.join.call(arguments, '')};\n" + | ||
| source = "var __t,__p='',__j=Array.prototype.join," + | ||
| "print=function(){__p+=__j.call(arguments,'');};\n" + | ||
| source + "return __p;\n"; | ||
| var render = new Function(settings.variable || 'obj', '_', source); | ||
| try { | ||
| var render = new Function(settings.variable || 'obj', '_', source); | ||
| } catch (e) { | ||
| e.source = source; | ||
| throw e; | ||
| } | ||
| if (data) return render(data, _); | ||
@@ -1044,6 +1184,4 @@ var template = function(data) { | ||
| // Provide the compiled function source as a convenience for build time | ||
| // precompilation. | ||
| template.source = 'function(' + (settings.variable || 'obj') + '){\n' + | ||
| source + '}'; | ||
| // Provide the compiled function source as a convenience for precompilation. | ||
| template.source = 'function(' + (settings.variable || 'obj') + '){\n' + source + '}'; | ||
@@ -1058,27 +1196,13 @@ return template; | ||
| // The OOP Wrapper | ||
| // OOP | ||
| // --------------- | ||
| // If Underscore is called as a function, it returns a wrapped object that | ||
| // can be used OO-style. This wrapper holds altered versions of all the | ||
| // underscore functions. Wrapped objects may be chained. | ||
| var wrapper = function(obj) { this._wrapped = obj; }; | ||
| // Expose `wrapper.prototype` as `_.prototype` | ||
| _.prototype = wrapper.prototype; | ||
| // Helper function to continue chaining intermediate results. | ||
| var result = function(obj, chain) { | ||
| return chain ? _(obj).chain() : obj; | ||
| var result = function(obj) { | ||
| return this._chain ? _(obj).chain() : obj; | ||
| }; | ||
| // A method to easily add functions to the OOP wrapper. | ||
| var addToWrapper = function(name, func) { | ||
| wrapper.prototype[name] = function() { | ||
| var args = slice.call(arguments); | ||
| unshift.call(args, this._wrapped); | ||
| return result(func.apply(_, args), this._chain); | ||
| }; | ||
| }; | ||
| // Add all of the Underscore functions to the wrapper object. | ||
@@ -1090,8 +1214,7 @@ _.mixin(_); | ||
| var method = ArrayProto[name]; | ||
| wrapper.prototype[name] = function() { | ||
| var wrapped = this._wrapped; | ||
| method.apply(wrapped, arguments); | ||
| var length = wrapped.length; | ||
| if ((name == 'shift' || name == 'splice') && length === 0) delete wrapped[0]; | ||
| return result(wrapped, this._chain); | ||
| _.prototype[name] = function() { | ||
| var obj = this._wrapped; | ||
| method.apply(obj, arguments); | ||
| if ((name == 'shift' || name == 'splice') && obj.length === 0) delete obj[0]; | ||
| return result.call(this, obj); | ||
| }; | ||
@@ -1103,18 +1226,22 @@ }); | ||
| var method = ArrayProto[name]; | ||
| wrapper.prototype[name] = function() { | ||
| return result(method.apply(this._wrapped, arguments), this._chain); | ||
| _.prototype[name] = function() { | ||
| return result.call(this, method.apply(this._wrapped, arguments)); | ||
| }; | ||
| }); | ||
| // Start chaining a wrapped Underscore object. | ||
| wrapper.prototype.chain = function() { | ||
| this._chain = true; | ||
| return this; | ||
| }; | ||
| _.extend(_.prototype, { | ||
| // Extracts the result from a wrapped and chained object. | ||
| wrapper.prototype.value = function() { | ||
| return this._wrapped; | ||
| }; | ||
| // Start chaining a wrapped Underscore object. | ||
| chain: function() { | ||
| this._chain = true; | ||
| return this; | ||
| }, | ||
| // Extracts the result from a wrapped and chained object. | ||
| value: function() { | ||
| return this._wrapped; | ||
| } | ||
| }); | ||
| }).call(this); |
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