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Diffstat (limited to 'web/src/vendor/lodash/dist/lodash.compat.js')
| -rw-r--r-- | web/src/vendor/lodash/dist/lodash.compat.js | 7157 |
1 files changed, 0 insertions, 7157 deletions
diff --git a/web/src/vendor/lodash/dist/lodash.compat.js b/web/src/vendor/lodash/dist/lodash.compat.js deleted file mode 100644 index 23798ba8..00000000 --- a/web/src/vendor/lodash/dist/lodash.compat.js +++ /dev/null @@ -1,7157 +0,0 @@ -/** - * @license - * Lo-Dash 2.4.1 (Custom Build) <http://lodash.com/> - * Build: `lodash -o ./dist/lodash.compat.js` - * Copyright 2012-2013 The Dojo Foundation <http://dojofoundation.org/> - * Based on Underscore.js 1.5.2 <http://underscorejs.org/LICENSE> - * Copyright 2009-2013 Jeremy Ashkenas, DocumentCloud and Investigative Reporters & Editors - * Available under MIT license <http://lodash.com/license> - */ -;(function() { - - /** Used as a safe reference for `undefined` in pre ES5 environments */ - var undefined; - - /** Used to pool arrays and objects used internally */ - var arrayPool = [], - objectPool = []; - - /** Used to generate unique IDs */ - var idCounter = 0; - - /** Used internally to indicate various things */ - var indicatorObject = {}; - - /** Used to prefix keys to avoid issues with `__proto__` and properties on `Object.prototype` */ - var keyPrefix = +new Date + ''; - - /** Used as the size when optimizations are enabled for large arrays */ - var largeArraySize = 75; - - /** Used as the max size of the `arrayPool` and `objectPool` */ - var maxPoolSize = 40; - - /** Used to detect and test whitespace */ - var whitespace = ( - // whitespace - ' \t\x0B\f\xA0\ufeff' + - - // line terminators - '\n\r\u2028\u2029' + - - // unicode category "Zs" space separators - '\u1680\u180e\u2000\u2001\u2002\u2003\u2004\u2005\u2006\u2007\u2008\u2009\u200a\u202f\u205f\u3000' - ); - - /** 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 ES6 template delimiters - * http://people.mozilla.org/~jorendorff/es6-draft.html#sec-literals-string-literals - */ - var reEsTemplate = /\$\{([^\\}]*(?:\\.[^\\}]*)*)\}/g; - - /** Used to match regexp flags from their coerced string values */ - var reFlags = /\w*$/; - - /** Used to detected named functions */ - var reFuncName = /^\s*function[ \n\r\t]+\w/; - - /** Used to match "interpolate" template delimiters */ - var reInterpolate = /<%=([\s\S]+?)%>/g; - - /** Used to match leading whitespace and zeros to be removed */ - var reLeadingSpacesAndZeros = RegExp('^[' + whitespace + ']*0+(?=.$)'); - - /** Used to ensure capturing order of template delimiters */ - var reNoMatch = /($^)/; - - /** Used to detect functions containing a `this` reference */ - var reThis = /\bthis\b/; - - /** Used to match unescaped characters in compiled string literals */ - var reUnescapedString = /['\n\r\t\u2028\u2029\\]/g; - - /** Used to assign default `context` object properties */ - var contextProps = [ - 'Array', 'Boolean', 'Date', 'Error', 'Function', 'Math', 'Number', 'Object', - 'RegExp', 'String', '_', 'attachEvent', 'clearTimeout', 'isFinite', 'isNaN', - 'parseInt', 'setTimeout' - ]; - - /** Used to fix the JScript [[DontEnum]] bug */ - var shadowedProps = [ - 'constructor', 'hasOwnProperty', 'isPrototypeOf', 'propertyIsEnumerable', - 'toLocaleString', 'toString', 'valueOf' - ]; - - /** Used to make template sourceURLs easier to identify */ - var templateCounter = 0; - - /** `Object#toString` result shortcuts */ - var argsClass = '[object Arguments]', - arrayClass = '[object Array]', - boolClass = '[object Boolean]', - dateClass = '[object Date]', - errorClass = '[object Error]', - funcClass = '[object Function]', - numberClass = '[object Number]', - objectClass = '[object Object]', - regexpClass = '[object RegExp]', - stringClass = '[object String]'; - - /** 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 as an internal `_.debounce` options object */ - var debounceOptions = { - 'leading': false, - 'maxWait': 0, - 'trailing': false - }; - - /** Used as the property descriptor for `__bindData__` */ - var descriptor = { - 'configurable': false, - 'enumerable': false, - 'value': null, - 'writable': false - }; - - /** Used as the data object for `iteratorTemplate` */ - var iteratorData = { - 'args': '', - 'array': null, - 'bottom': '', - 'firstArg': '', - 'init': '', - 'keys': null, - 'loop': '', - 'shadowedProps': null, - 'support': null, - 'top': '', - 'useHas': false - }; - - /** 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' - }; - - /** Used as a reference to the global object */ - var root = (objectTypes[typeof window] && window) || this; - - /** 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; - - /** Detect the popular CommonJS extension `module.exports` */ - var moduleExports = freeModule && freeModule.exports === freeExports && freeExports; - - /** Detect free variable `global` from Node.js or Browserified code and use it as `root` */ - var freeGlobal = objectTypes[typeof global] && global; - if (freeGlobal && (freeGlobal.global === freeGlobal || freeGlobal.window === freeGlobal)) { - root = freeGlobal; - } - - /*--------------------------------------------------------------------------*/ - - /** - * The base implementation of `_.indexOf` without support for binary searches - * or `fromIndex` constraints. - * - * @private - * @param {Array} array The array to search. - * @param {*} value The value to search for. - * @param {number} [fromIndex=0] The index to search from. - * @returns {number} Returns the index of the matched value or `-1`. - */ - function baseIndexOf(array, value, fromIndex) { - var index = (fromIndex || 0) - 1, - length = array ? array.length : 0; - - while (++index < length) { - if (array[index] === value) { - return index; - } - } - return -1; - } - - /** - * An implementation of `_.contains` for cache objects that mimics the return - * signature of `_.indexOf` by returning `0` if the value is found, else `-1`. - * - * @private - * @param {Object} cache The cache object to inspect. - * @param {*} value The value to search for. - * @returns {number} Returns `0` if `value` is found, else `-1`. - */ - function cacheIndexOf(cache, value) { - var type = typeof value; - cache = cache.cache; - - if (type == 'boolean' || value == null) { - return cache[value] ? 0 : -1; - } - if (type != 'number' && type != 'string') { - type = 'object'; - } - var key = type == 'number' ? value : keyPrefix + value; - cache = (cache = cache[type]) && cache[key]; - - return type == 'object' - ? (cache && baseIndexOf(cache, value) > -1 ? 0 : -1) - : (cache ? 0 : -1); - } - - /** - * Adds a given value to the corresponding cache object. - * - * @private - * @param {*} value The value to add to the cache. - */ - function cachePush(value) { - var cache = this.cache, - type = typeof value; - - if (type == 'boolean' || value == null) { - cache[value] = true; - } else { - if (type != 'number' && type != 'string') { - type = 'object'; - } - var key = type == 'number' ? value : keyPrefix + value, - typeCache = cache[type] || (cache[type] = {}); - - if (type == 'object') { - (typeCache[key] || (typeCache[key] = [])).push(value); - } else { - typeCache[key] = true; - } - } - } - - /** - * Used by `_.max` and `_.min` as the default callback when a given - * collection is a string value. - * - * @private - * @param {string} value The character to inspect. - * @returns {number} Returns the code unit of given character. - */ - function charAtCallback(value) { - return value.charCodeAt(0); - } - - /** - * Used by `sortBy` to compare transformed `collection` elements, stable sorting - * them in ascending order. - * - * @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`. - */ - function compareAscending(a, b) { - var ac = a.criteria, - bc = b.criteria, - index = -1, - length = ac.length; - - while (++index < length) { - var value = ac[index], - other = bc[index]; - - if (value !== other) { - if (value > other || typeof value == 'undefined') { - return 1; - } - if (value < other || typeof other == 'undefined') { - return -1; - } - } - } - // Fixes an `Array#sort` bug in the JS engine embedded in Adobe applications - // that causes it, under certain circumstances, to return the same value for - // `a` and `b`. See https://github.com/jashkenas/underscore/pull/1247 - // - // This also ensures a stable sort in V8 and other engines. - // See http://code.google.com/p/v8/issues/detail?id=90 - return a.index - b.index; - } - - /** - * Creates a cache object to optimize linear searches of large arrays. - * - * @private - * @param {Array} [array=[]] The array to search. - * @returns {null|Object} Returns the cache object or `null` if caching should not be used. - */ - function createCache(array) { - var index = -1, - length = array.length, - first = array[0], - mid = array[(length / 2) | 0], - last = array[length - 1]; - - if (first && typeof first == 'object' && - mid && typeof mid == 'object' && last && typeof last == 'object') { - return false; - } - var cache = getObject(); - cache['false'] = cache['null'] = cache['true'] = cache['undefined'] = false; - - var result = getObject(); - result.array = array; - result.cache = cache; - result.push = cachePush; - - while (++index < length) { - result.push(array[index]); - } - return result; - } - - /** - * Used by `template` to escape characters for inclusion in compiled - * string literals. - * - * @private - * @param {string} match The matched character to escape. - * @returns {string} Returns the escaped character. - */ - function escapeStringChar(match) { - return '\\' + stringEscapes[match]; - } - - /** - * Gets an array from the array pool or creates a new one if the pool is empty. - * - * @private - * @returns {Array} The array from the pool. - */ - function getArray() { - return arrayPool.pop() || []; - } - - /** - * Gets an object from the object pool or creates a new one if the pool is empty. - * - * @private - * @returns {Object} The object from the pool. - */ - function getObject() { - return objectPool.pop() || { - 'array': null, - 'cache': null, - 'criteria': null, - 'false': false, - 'index': 0, - 'null': false, - 'number': null, - 'object': null, - 'push': null, - 'string': null, - 'true': false, - 'undefined': false, - 'value': null - }; - } - - /** - * Checks if `value` is a DOM node in IE < 9. - * - * @private - * @param {*} value The value to check. - * @returns {boolean} Returns `true` if the `value` is a DOM node, 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'; - } - - /** - * Releases the given array back to the array pool. - * - * @private - * @param {Array} [array] The array to release. - */ - function releaseArray(array) { - array.length = 0; - if (arrayPool.length < maxPoolSize) { - arrayPool.push(array); - } - } - - /** - * Releases the given object back to the object pool. - * - * @private - * @param {Object} [object] The object to release. - */ - function releaseObject(object) { - var cache = object.cache; - if (cache) { - releaseObject(cache); - } - object.array = object.cache = object.criteria = object.object = object.number = object.string = object.value = null; - if (objectPool.length < maxPoolSize) { - objectPool.push(object); - } - } - - /** - * 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. - * - * @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. - */ - function slice(array, start, end) { - start || (start = 0); - if (typeof end == 'undefined') { - end = array ? array.length : 0; - } - var index = -1, - length = end - start || 0, - result = Array(length < 0 ? 0 : length); - - while (++index < length) { - result[index] = array[start + index]; - } - return result; - } - - /*--------------------------------------------------------------------------*/ - - /** - * Create a new `lodash` function using the given context object. - * - * @static - * @memberOf _ - * @category Utilities - * @param {Object} [context=root] The context object. - * @returns {Function} Returns the `lodash` function. - */ - function runInContext(context) { - // Avoid issues with some ES3 environments that attempt to use values, named - // after built-in constructors like `Object`, for the creation of literals. - // ES5 clears this up by stating that literals must use built-in constructors. - // See http://es5.github.io/#x11.1.5. - context = context ? _.defaults(root.Object(), context, _.pick(root, contextProps)) : root; - - /** Native constructor references */ - var Array = context.Array, - Boolean = context.Boolean, - Date = context.Date, - Error = context.Error, - Function = context.Function, - Math = context.Math, - Number = context.Number, - Object = context.Object, - RegExp = context.RegExp, - String = context.String, - TypeError = context.TypeError; - - /** - * Used for `Array` method references. - * - * Normally `Array.prototype` would suffice, however, using an array literal - * avoids issues in Narwhal. - */ - var arrayRef = []; - - /** Used for native method references */ - var errorProto = Error.prototype, - objectProto = Object.prototype, - stringProto = String.prototype; - - /** Used to restore the original `_` reference in `noConflict` */ - var oldDash = context._; - - /** Used to resolve the internal [[Class]] of values */ - var toString = objectProto.toString; - - /** Used to detect if a method is native */ - var reNative = RegExp('^' + - String(toString) - .replace(/[.*+?^${}()|[\]\\]/g, '\\$&') - .replace(/toString| for [^\]]+/g, '.*?') + '$' - ); - - /** Native method shortcuts */ - var ceil = Math.ceil, - clearTimeout = context.clearTimeout, - floor = Math.floor, - fnToString = Function.prototype.toString, - getPrototypeOf = isNative(getPrototypeOf = Object.getPrototypeOf) && getPrototypeOf, - hasOwnProperty = objectProto.hasOwnProperty, - push = arrayRef.push, - propertyIsEnumerable = objectProto.propertyIsEnumerable, - setTimeout = context.setTimeout, - splice = arrayRef.splice, - unshift = arrayRef.unshift; - - /** Used to set meta data on functions */ - var defineProperty = (function() { - // IE 8 only accepts DOM elements - try { - var o = {}, - func = isNative(func = Object.defineProperty) && func, - result = func(o, o, o) && func; - } catch(e) { } - return result; - }()); - - /* Native method shortcuts for methods with the same name as other `lodash` methods */ - var nativeCreate = isNative(nativeCreate = Object.create) && nativeCreate, - nativeIsArray = isNative(nativeIsArray = Array.isArray) && nativeIsArray, - nativeIsFinite = context.isFinite, - nativeIsNaN = context.isNaN, - nativeKeys = isNative(nativeKeys = Object.keys) && nativeKeys, - nativeMax = Math.max, - nativeMin = Math.min, - nativeParseInt = context.parseInt, - nativeRandom = Math.random; - - /** Used to lookup a built-in constructor by [[Class]] */ - var ctorByClass = {}; - ctorByClass[arrayClass] = Array; - ctorByClass[boolClass] = Boolean; - ctorByClass[dateClass] = Date; - ctorByClass[funcClass] = Function; - ctorByClass[objectClass] = Object; - ctorByClass[numberClass] = Number; - ctorByClass[regexpClass] = RegExp; - ctorByClass[stringClass] = String; - - /** Used to avoid iterating non-enumerable properties in IE < 9 */ - var nonEnumProps = {}; - nonEnumProps[arrayClass] = nonEnumProps[dateClass] = nonEnumProps[numberClass] = { 'constructor': true, 'toLocaleString': true, 'toString': true, 'valueOf': true }; - nonEnumProps[boolClass] = nonEnumProps[stringClass] = { 'constructor': true, 'toString': true, 'valueOf': true }; - nonEnumProps[errorClass] = nonEnumProps[funcClass] = nonEnumProps[regexpClass] = { 'constructor': true, 'toString': true }; - nonEnumProps[objectClass] = { 'constructor': true }; - - (function() { - var length = shadowedProps.length; - while (length--) { - var key = shadowedProps[length]; - for (var className in nonEnumProps) { - if (hasOwnProperty.call(nonEnumProps, className) && !hasOwnProperty.call(nonEnumProps[className], key)) { - nonEnumProps[className][key] = false; - } - } - } - }()); - - /*--------------------------------------------------------------------------*/ - - /** - * Creates a `lodash` object which wraps the given value to enable intuitive - * method chaining. - * - * In addition to Lo-Dash methods, wrappers also have the following `Array` methods: - * `concat`, `join`, `pop`, `push`, `reverse`, `shift`, `slice`, `sort`, `splice`, - * and `unshift` - * - * Chaining is supported in custom builds as long as the `value` method is - * implicitly or explicitly included in the build. - * - * The chainable wrapper functions are: - * `after`, `assign`, `bind`, `bindAll`, `bindKey`, `chain`, `compact`, - * `compose`, `concat`, `countBy`, `create`, `createCallback`, `curry`, - * `debounce`, `defaults`, `defer`, `delay`, `difference`, `filter`, `flatten`, - * `forEach`, `forEachRight`, `forIn`, `forInRight`, `forOwn`, `forOwnRight`, - * `functions`, `groupBy`, `indexBy`, `initial`, `intersection`, `invert`, - * `invoke`, `keys`, `map`, `max`, `memoize`, `merge`, `min`, `object`, `omit`, - * `once`, `pairs`, `partial`, `partialRight`, `pick`, `pluck`, `pull`, `push`, - * `range`, `reject`, `remove`, `rest`, `reverse`, `shuffle`, `slice`, `sort`, - * `sortBy`, `splice`, `tap`, `throttle`, `times`, `toArray`, `transform`, - * `union`, `uniq`, `unshift`, `unzip`, `values`, `where`, `without`, `wrap`, - * and `zip` - * - * The non-chainable wrapper functions are: - * `clone`, `cloneDeep`, `contains`, `escape`, `every`, `find`, `findIndex`, - * `findKey`, `findLast`, `findLastIndex`, `findLastKey`, `has`, `identity`, - * `indexOf`, `isArguments`, `isArray`, `isBoolean`, `isDate`, `isElement`, - * `isEmpty`, `isEqual`, `isFinite`, `isFunction`, `isNaN`, `isNull`, `isNumber`, - * `isObject`, `isPlainObject`, `isRegExp`, `isString`, `isUndefined`, `join`, - * `lastIndexOf`, `mixin`, `noConflict`, `parseInt`, `pop`, `random`, `reduce`, - * `reduceRight`, `result`, `shift`, `size`, `some`, `sortedIndex`, `runInContext`, - * `template`, `unescape`, `uniqueId`, and `value` - * - * The wrapper functions `first` and `last` return wrapped values when `n` is - * provided, otherwise they return unwrapped values. - * - * Explicit chaining can be enabled by using the `_.chain` method. - * - * @name _ - * @constructor - * @category Chaining - * @param {*} value The value to wrap in a `lodash` instance. - * @returns {Object} Returns a `lodash` instance. - * @example - * - * var wrapped = _([1, 2, 3]); - * - * // returns an unwrapped value - * wrapped.reduce(function(sum, num) { - * return sum + num; - * }); - * // => 6 - * - * // returns a wrapped value - * var squares = wrapped.map(function(num) { - * return num * num; - * }); - * - * _.isArray(squares); - * // => false - * - * _.isArray(squares.value()); - * // => true - */ - function lodash(value) { - // don't wrap if already wrapped, even if wrapped by a different `lodash` constructor - return (value && typeof value == 'object' && !isArray(value) && hasOwnProperty.call(value, '__wrapped__')) - ? value - : new lodashWrapper(value); - } - - /** - * A fast path for creating `lodash` wrapper objects. - * - * @private - * @param {*} value The value to wrap in a `lodash` instance. - * @param {boolean} chainAll A flag to enable chaining for all methods - * @returns {Object} Returns a `lodash` instance. - */ - function lodashWrapper(value, chainAll) { - this.__chain__ = !!chainAll; - this.__wrapped__ = value; - } - // ensure `new lodashWrapper` is an instance of `lodash` - lodashWrapper.prototype = lodash.prototype; - - /** - * An object used to flag environments features. - * - * @static - * @memberOf _ - * @type Object - */ - var support = lodash.support = {}; - - (function() { - var ctor = function() { this.x = 1; }, - object = { '0': 1, 'length': 1 }, - props = []; - - ctor.prototype = { 'valueOf': 1, 'y': 1 }; - for (var key in new ctor) { props.push(key); } - for (key in arguments) { } - - /** - * Detect if an `arguments` object's [[Class]] is resolvable (all but Firefox < 4, IE < 9). - * - * @memberOf _.support - * @type boolean - */ - support.argsClass = toString.call(arguments) == argsClass; - - /** - * Detect if `arguments` objects are `Object` objects (all but Narwhal and Opera < 10.5). - * - * @memberOf _.support - * @type boolean - */ - support.argsObject = arguments.constructor == Object && !(arguments instanceof Array); - - /** - * Detect if `name` or `message` properties of `Error.prototype` are - * enumerable by default. (IE < 9, Safari < 5.1) - * - * @memberOf _.support - * @type boolean - */ - support.enumErrorProps = propertyIsEnumerable.call(errorProto, 'message') || propertyIsEnumerable.call(errorProto, 'name'); - - /** - * 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 sets a function's `prototype` property [[Enumerable]] - * value to `true`. - * - * @memberOf _.support - * @type boolean - */ - support.enumPrototypes = propertyIsEnumerable.call(ctor, 'prototype'); - - /** - * Detect if functions can be decompiled by `Function#toString` - * (all but PS3 and older Opera mobile browsers & avoided in Windows 8 apps). - * - * @memberOf _.support - * @type boolean - */ - support.funcDecomp = !isNative(context.WinRTError) && reThis.test(runInContext); - - /** - * Detect if `Function#name` is supported (all but IE). - * - * @memberOf _.support - * @type boolean - */ - support.funcNames = typeof Function.name == 'string'; - - /** - * Detect if `arguments` object indexes are non-enumerable - * (Firefox < 4, IE < 9, PhantomJS, Safari < 5.1). - * - * @memberOf _.support - * @type boolean - */ - support.nonEnumArgs = key != 0; - - /** - * Detect if properties shadowing those on `Object.prototype` are non-enumerable. - * - * In IE < 9 an objects own properties, shadowing non-enumerable ones, are - * made non-enumerable as well (a.k.a the JScript [[DontEnum]] bug). - * - * @memberOf _.support - * @type boolean - */ - support.nonEnumShadows = !/valueOf/.test(props); - - /** - * Detect if own properties are iterated after inherited properties (all but IE < 9). - * - * @memberOf _.support - * @type boolean - */ - support.ownLast = props[0] != 'x'; - - /** - * Detect if `Array#shift` and `Array#splice` augment array-like objects correctly. - * - * 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. - * - * @memberOf _.support - * @type boolean - */ - support.spliceObjects = (arrayRef.splice.call(object, 0, 1), !object[0]); - - /** - * Detect lack of support for accessing string characters by index. - * - * IE < 8 can't access characters by index and IE 8 can only access - * characters by index on string literals. - * - * @memberOf _.support - * @type boolean - */ - support.unindexedChars = ('x'[0] + Object('x')[0]) != 'xx'; - - /** - * Detect if a DOM node's [[Class]] is resolvable (all but IE < 9) - * and that the JS engine errors when attempting to coerce an object to - * a string without a `toString` function. - * - * @memberOf _.support - * @type boolean - */ - try { - support.nodeClass = !(toString.call(document) == objectClass && !({ 'toString': 0 } + '')); - } catch(e) { - support.nodeClass = true; - } - }(1)); - - /** - * 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. - * - * @static - * @memberOf _ - * @type Object - */ - lodash.templateSettings = { - - /** - * Used to detect `data` property values to be HTML-escaped. - * - * @memberOf _.templateSettings - * @type RegExp - */ - 'escape': /<%-([\s\S]+?)%>/g, - - /** - * Used to detect code to be evaluated. - * - * @memberOf _.templateSettings - * @type RegExp - */ - 'evaluate': /<%([\s\S]+?)%>/g, - - /** - * Used to detect `data` property values to inject. - * - * @memberOf _.templateSettings - * @type RegExp - */ - 'interpolate': reInterpolate, - - /** - * Used to reference the data object in the template text. - * - * @memberOf _.templateSettings - * @type string - */ - 'variable': '', - - /** - * Used to import variables into the compiled template. - * - * @memberOf _.templateSettings - * @type Object - */ - 'imports': { - - /** - * A reference to the `lodash` function. - * - * @memberOf _.templateSettings.imports - * @type Function - */ - '_': lodash - } - }; - - /*--------------------------------------------------------------------------*/ - - /** - * The template used to create iterator functions. - * - * @private - * @param {Object} data The data object used to populate the text. - * @returns {string} Returns the interpolated text. - */ - var iteratorTemplate = function(obj) { - - var __p = 'var index, iterable = ' + - (obj.firstArg) + - ', result = ' + - (obj.init) + - ';\nif (!iterable) return result;\n' + - (obj.top) + - ';'; - if (obj.array) { - __p += '\nvar length = iterable.length; index = -1;\nif (' + - (obj.array) + - ') { '; - if (support.unindexedChars) { - __p += '\n if (isString(iterable)) {\n iterable = iterable.split(\'\')\n } '; - } - __p += '\n while (++index < length) {\n ' + - (obj.loop) + - ';\n }\n}\nelse { '; - } else if (support.nonEnumArgs) { - __p += '\n var length = iterable.length; index = -1;\n if (length && isArguments(iterable)) {\n while (++index < length) {\n index += \'\';\n ' + - (obj.loop) + - ';\n }\n } else { '; - } - - if (support.enumPrototypes) { - __p += '\n var skipProto = typeof iterable == \'function\';\n '; - } - - if (support.enumErrorProps) { - __p += '\n var skipErrorProps = iterable === errorProto || iterable instanceof Error;\n '; - } - - var conditions = []; if (support.enumPrototypes) { conditions.push('!(skipProto && index == "prototype")'); } if (support.enumErrorProps) { conditions.push('!(skipErrorProps && (index == "message" || index == "name"))'); } - - if (obj.useHas && obj.keys) { - __p += '\n var ownIndex = -1,\n ownProps = objectTypes[typeof iterable] && keys(iterable),\n length = ownProps ? ownProps.length : 0;\n\n while (++ownIndex < length) {\n index = ownProps[ownIndex];\n'; - if (conditions.length) { - __p += ' if (' + - (conditions.join(' && ')) + - ') {\n '; - } - __p += - (obj.loop) + - '; '; - if (conditions.length) { - __p += '\n }'; - } - __p += '\n } '; - } else { - __p += '\n for (index in iterable) {\n'; - if (obj.useHas) { conditions.push("hasOwnProperty.call(iterable, index)"); } if (conditions.length) { - __p += ' if (' + - (conditions.join(' && ')) + - ') {\n '; - } - __p += - (obj.loop) + - '; '; - if (conditions.length) { - __p += '\n }'; - } - __p += '\n } '; - if (support.nonEnumShadows) { - __p += '\n\n if (iterable !== objectProto) {\n var ctor = iterable.constructor,\n isProto = iterable === (ctor && ctor.prototype),\n className = iterable === stringProto ? stringClass : iterable === errorProto ? errorClass : toString.call(iterable),\n nonEnum = nonEnumProps[className];\n '; - for (k = 0; k < 7; k++) { - __p += '\n index = \'' + - (obj.shadowedProps[k]) + - '\';\n if ((!(isProto && nonEnum[index]) && hasOwnProperty.call(iterable, index))'; - if (!obj.useHas) { - __p += ' || (!nonEnum[index] && iterable[index] !== objectProto[index])'; - } - __p += ') {\n ' + - (obj.loop) + - ';\n } '; - } - __p += '\n } '; - } - - } - - if (obj.array || support.nonEnumArgs) { - __p += '\n}'; - } - __p += - (obj.bottom) + - ';\nreturn result'; - - return __p - }; - - /*--------------------------------------------------------------------------*/ - - /** - * The base implementation of `_.bind` that creates the bound function and - * sets its meta data. - * - * @private - * @param {Array} bindData The bind data array. - * @returns {Function} Returns the new bound function. - */ - function baseBind(bindData) { - var func = bindData[0], - partialArgs = bindData[2], - thisArg = bindData[4]; - - function bound() { - // `Function#bind` spec - // http://es5.github.io/#x15.3.4.5 - if (partialArgs) { - // avoid `arguments` object deoptimizations by using `slice` instead - // of `Array.prototype.slice.call` and not assigning `arguments` to a - // variable as a ternary expression - var args = slice(partialArgs); - push.apply(args, arguments); - } - // mimic the constructor's `return` behavior - // http://es5.github.io/#x13.2.2 - if (this instanceof bound) { - // ensure `new bound` is an instance of `func` - var thisBinding = baseCreate(func.prototype), - result = func.apply(thisBinding, args || arguments); - return isObject(result) ? result : thisBinding; - } - return func.apply(thisArg, args || arguments); - } - setBindData(bound, bindData); - return bound; - } - - /** - * The base implementation of `_.clone` without argument juggling or support - * for `thisArg` binding. - * - * @private - * @param {*} value The value to clone. - * @param {boolean} [isDeep=false] Specify a deep clone. - * @param {Function} [callback] The function to customize cloning values. - * @param {Array} [stackA=[]] Tracks traversed source objects. - * @param {Array} [stackB=[]] Associates clones with source counterparts. - * @returns {*} Returns the cloned value. - */ - function baseClone(value, isDeep, callback, stackA, stackB) { - if (callback) { - var result = callback(value); - if (typeof result != 'undefined') { - return result; - } - } - // inspect [[Class]] - var isObj = isObject(value); - if (isObj) { - var className = toString.call(value); - if (!cloneableClasses[className] || (!support.nodeClass && isNode(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); - - case regexpClass: - result = ctor(value.source, reFlags.exec(value)); - result.lastIndex = value.lastIndex; - return result; - } - } else { - return value; - } - var isArr = isArray(value); - if (isDeep) { - // check for circular references and return corresponding clone - var initedStack = !stackA; - stackA || (stackA = getArray()); - stackB || (stackB = getArray()); - - var length = stackA.length; - while (length--) { - if (stackA[length] == value) { - return stackB[length]; - } - } - result = isArr ? ctor(value.length) : {}; - } - else { - result = isArr ? slice(value) : assign({}, value); - } - // add array properties assigned by `RegExp#exec` - if (isArr) { - if (hasOwnProperty.call(value, 'index')) { - result.index = value.index; - } - if (hasOwnProperty.call(value, 'input')) { - result.input = value.input; - } - } - // exit for shallow clone - if (!isDeep) { - return result; - } - // 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 ? baseEach : forOwn)(value, function(objValue, key) { - result[key] = baseClone(objValue, isDeep, callback, stackA, stackB); - }); - - if (initedStack) { - releaseArray(stackA); - releaseArray(stackB); - } - return result; - } - - /** - * 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. - */ - function baseCreate(prototype, properties) { - return isObject(prototype) ? nativeCreate(prototype) : {}; - } - // fallback for browsers without `Object.create` - if (!nativeCreate) { - baseCreate = (function() { - function Object() {} - return function(prototype) { - if (isObject(prototype)) { - Object.prototype = prototype; - var result = new Object; - Object.prototype = null; - } - return result || context.Object(); - }; - }()); - } - - /** - * The base implementation of `_.createCallback` without support for creating - * "_.pluck" or "_.where" style callbacks. - * - * @private - * @param {*} [func=identity] The value to convert to a callback. - * @param {*} [thisArg] The `this` binding of the created callback. - * @param {number} [argCount] The number of arguments the callback accepts. - * @returns {Function} Returns a callback function. - */ - function baseCreateCallback(func, thisArg, argCount) { - if (typeof func != 'function') { - return identity; - } - // exit early for no `thisArg` or already bound by `Function#bind` - if (typeof thisArg == 'undefined' || !('prototype' in func)) { - return func; - } - var bindData = func.__bindData__; - if (typeof bindData == 'undefined') { - if (support.funcNames) { - bindData = !func.name; - } - bindData = bindData || !support.funcDecomp; - if (!bindData) { - var source = fnToString.call(func); - if (!support.funcNames) { - bindData = !reFuncName.test(source); - } - if (!bindData) { - // checks if `func` references the `this` keyword and stores the result - bindData = reThis.test(source); - setBindData(func, bindData); - } - } - } - // exit early if there are no `this` references or `func` is bound - if (bindData === false || (bindData !== true && bindData[1] & 1)) { - return func; - } - switch (argCount) { - case 1: return function(value) { - return func.call(thisArg, value); - }; - case 2: return function(a, b) { - return func.call(thisArg, a, b); - }; - 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); - }; - } - return bind(func, thisArg); - } - - /** - * The base implementation of `createWrapper` that creates the wrapper and - * sets its meta data. - * - * @private - * @param {Array} bindData The bind data array. - * @returns {Function} Returns the new function. - */ - function baseCreateWrapper(bindData) { - var func = bindData[0], - bitmask = bindData[1], - partialArgs = bindData[2], - partialRightArgs = bindData[3], - thisArg = bindData[4], - arity = bindData[5]; - - var isBind = bitmask & 1, - isBindKey = bitmask & 2, - isCurry = bitmask & 4, - isCurryBound = bitmask & 8, - key = func; - - function bound() { - var thisBinding = isBind ? thisArg : this; - if (partialArgs) { - var args = slice(partialArgs); - push.apply(args, arguments); - } - if (partialRightArgs || isCurry) { - args || (args = slice(arguments)); - if (partialRightArgs) { - push.apply(args, partialRightArgs); - } - if (isCurry && args.length < arity) { - bitmask |= 16 & ~32; - return baseCreateWrapper([func, (isCurryBound ? bitmask : bitmask & ~3), args, null, thisArg, arity]); - } - } - args || (args = arguments); - if (isBindKey) { - func = thisBinding[key]; - } - if (this instanceof bound) { - thisBinding = baseCreate(func.prototype); - var result = func.apply(thisBinding, args); - return isObject(result) ? result : thisBinding; - } - return func.apply(thisBinding, args); - } - setBindData(bound, bindData); - return bound; - } - - /** - * The base implementation of `_.difference` that accepts a single array - * of values to exclude. - * - * @private - * @param {Array} array The array to process. - * @param {Array} [values] The array of values to exclude. - * @returns {Array} Returns a new array of filtered values. - */ - function baseDifference(array, values) { - var index = -1, - indexOf = getIndexOf(), - length = array ? array.length : 0, - isLarge = length >= largeArraySize && indexOf === baseIndexOf, - result = []; - - if (isLarge) { - var cache = createCache(values); - if (cache) { - indexOf = cacheIndexOf; - values = cache; - } else { - isLarge = false; - } - } - while (++index < length) { - var value = array[index]; - if (indexOf(values, value) < 0) { - result.push(value); - } - } - if (isLarge) { - releaseObject(values); - } - return result; - } - - /** - * The base implementation of `_.flatten` without support for callback - * shorthands or `thisArg` binding. - * - * @private - * @param {Array} array The array to flatten. - * @param {boolean} [isShallow=false] A flag to restrict flattening to a single level. - * @param {boolean} [isStrict=false] A flag to restrict flattening to arrays and `arguments` objects. - * @param {number} [fromIndex=0] The index to start from. - * @returns {Array} Returns a new flattened array. - */ - function baseFlatten(array, isShallow, isStrict, fromIndex) { - var index = (fromIndex || 0) - 1, - length = array ? array.length : 0, - result = []; - - while (++index < length) { - var value = array[index]; - - if (value && typeof value == 'object' && typeof value.length == 'number' - && (isArray(value) || isArguments(value))) { - // recursively flatten arrays (susceptible to call stack limits) - if (!isShallow) { - value = baseFlatten(value, isShallow, isStrict); - } - var valIndex = -1, - valLength = value.length, - resIndex = result.length; - - result.length += valLength; - while (++valIndex < valLength) { - result[resIndex++] = value[valIndex]; - } - } else if (!isStrict) { - result.push(value); - } - } - return result; - } - - /** - * The base implementation of `_.isEqual`, without support for `thisArg` binding, - * that allows partial "_.where" style comparisons. - * - * @private - * @param {*} a The value to compare. - * @param {*} b The other value to compare. - * @param {Function} [callback] The function to customize comparing values. - * @param {Function} [isWhere=false] A flag to indicate performing partial comparisons. - * @param {Array} [stackA=[]] Tracks traversed `a` objects. - * @param {Array} [stackB=[]] Tracks traversed `b` objects. - * @returns {boolean} Returns `true` if the values are equivalent, else `false`. - */ - function baseIsEqual(a, b, callback, isWhere, stackA, stackB) { - // used to indicate that when comparing objects, `a` has at least the properties of `b` - if (callback) { - var result = callback(a, b); - if (typeof result != 'undefined') { - return !!result; - } - } - // exit early for identical values - if (a === b) { - // treat `+0` vs. `-0` as not equal - return a !== 0 || (1 / a == 1 / b); - } - var type = typeof a, - otherType = typeof b; - - // exit early for unlike primitive values - if (a === a && - !(a && objectTypes[type]) && - !(b && objectTypes[otherType])) { - return false; - } - // exit early for `null` and `undefined` avoiding ES3's Function#call behavior - // http://es5.github.io/#x15.3.4.4 - if (a == null || b == null) { - return a === b; - } - // compare [[Class]] names - var className = toString.call(a), - otherClass = toString.call(b); - - if (className == argsClass) { - className = objectClass; - } - if (otherClass == argsClass) { - otherClass = objectClass; - } - if (className != otherClass) { - return false; - } - 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.io/#x15.10.6.4) - // treat string primitives and their corresponding object instances as equal - return a == String(b); - } - var isArr = className == arrayClass; - if (!isArr) { - // unwrap any `lodash` wrapped values - var aWrapped = hasOwnProperty.call(a, '__wrapped__'), - bWrapped = hasOwnProperty.call(b, '__wrapped__'); - - if (aWrapped || bWrapped) { - return baseIsEqual(aWrapped ? a.__wrapped__ : a, bWrapped ? b.__wrapped__ : b, callback, isWhere, stackA, stackB); - } - // exit for functions and DOM nodes - if (className != objectClass || (!support.nodeClass && (isNode(a) || isNode(b)))) { - return false; - } - // in older versions of Opera, `arguments` objects have `Array` constructors - var ctorA = !support.argsObject && isArguments(a) ? Object : a.constructor, - ctorB = !support.argsObject && 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) && - ('constructor' in a && 'constructor' in b) - ) { - return false; - } - } - // 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.io/#x15.12.3) - var initedStack = !stackA; - stackA || (stackA = getArray()); - stackB || (stackB = getArray()); - - var length = stackA.length; - while (length--) { - if (stackA[length] == a) { - return stackB[length] == b; - } - } - var size = 0; - result = true; - - // add `a` and `b` to the stack of traversed objects - stackA.push(a); - stackB.push(b); - - // recursively compare objects and arrays (susceptible to call stack limits) - if (isArr) { - // compare lengths to determine if a deep comparison is necessary - length = a.length; - size = b.length; - result = size == length; - - if (result || isWhere) { - // deep compare the contents, ignoring non-numeric properties - while (size--) { - var index = length, - value = b[size]; - - if (isWhere) { - while (index--) { - if ((result = baseIsEqual(a[index], value, callback, isWhere, stackA, stackB))) { - break; - } - } - } else if (!(result = baseIsEqual(a[size], value, callback, isWhere, stackA, stackB))) { - break; - } - } - } - } - else { - // deep compare objects using `forIn`, instead of `forOwn`, to avoid `Object.keys` - // which, in this case, is more costly - forIn(b, function(value, key, b) { - if (hasOwnProperty.call(b, key)) { - // count the number of properties. - size++; - // deep compare each property value. - return (result = hasOwnProperty.call(a, key) && baseIsEqual(a[key], value, callback, isWhere, stackA, stackB)); - } - }); - - if (result && !isWhere) { - // ensure both objects have the same number of properties - forIn(a, function(value, key, a) { - if (hasOwnProperty.call(a, key)) { - // `size` will be `-1` if `a` has more properties than `b` - return (result = --size > -1); - } - }); - } - } - stackA.pop(); - stackB.pop(); - - if (initedStack) { - releaseArray(stackA); - releaseArray(stackB); - } - return result; - } - - /** - * The base implementation of `_.merge` without argument juggling or support - * for `thisArg` binding. - * - * @private - * @param {Object} object The destination object. - * @param {Object} source The source object. - * @param {Function} [callback] The function to customize merging properties. - * @param {Array} [stackA=[]] Tracks traversed source objects. - * @param {Array} [stackB=[]] Associates values with source counterparts. - */ - function baseMerge(object, source, callback, stackA, stackB) { - (isArray(source) ? forEach : forOwn)(source, function(source, key) { - var found, - isArr, - result = source, - value = object[key]; - - if (source && ((isArr = isArray(source)) || isPlainObject(source))) { - // avoid merging previously merged cyclic sources - var stackLength = stackA.length; - while (stackLength--) { - if ((found = stackA[stackLength] == source)) { - value = stackB[stackLength]; - break; - } - } - if (!found) { - var isShallow; - if (callback) { - result = callback(value, source); - if ((isShallow = typeof result != 'undefined')) { - value = result; - } - } - if (!isShallow) { - value = isArr - ? (isArray(value) ? value : []) - : (isPlainObject(value) ? value : {}); - } - // add `source` and associated `value` to the stack of traversed objects - stackA.push(source); - stackB.push(value); - - // recursively merge objects and arrays (susceptible to call stack limits) - if (!isShallow) { - baseMerge(value, source, callback, stackA, stackB); - } - } - } - else { - if (callback) { - result = callback(value, source); - if (typeof result == 'undefined') { - result = source; - } - } - if (typeof result != 'undefined') { - value = result; - } - } - object[key] = value; - }); - } - - /** - * The base implementation of `_.random` without argument juggling or support - * for returning floating-point numbers. - * - * @private - * @param {number} min The minimum possible value. - * @param {number} max The maximum possible value. - * @returns {number} Returns a random number. - */ - function baseRandom(min, max) { - return min + floor(nativeRandom() * (max - min + 1)); - } - - /** - * The base implementation of `_.uniq` without support for callback shorthands - * or `thisArg` binding. - * - * @private - * @param {Array} array The array to process. - * @param {boolean} [isSorted=false] A flag to indicate that `array` is sorted. - * @param {Function} [callback] The function called per iteration. - * @returns {Array} Returns a duplicate-value-free array. - */ - function baseUniq(array, isSorted, callback) { - var index = -1, - indexOf = getIndexOf(), - length = array ? array.length : 0, - result = []; - - var isLarge = !isSorted && length >= largeArraySize && indexOf === baseIndexOf, - seen = (callback || isLarge) ? getArray() : result; - - if (isLarge) { - var cache = createCache(seen); - indexOf = cacheIndexOf; - seen = cache; - } - while (++index < length) { - var value = array[index], - computed = callback ? callback(value, index, array) : value; - - if (isSorted - ? !index || seen[seen.length - 1] !== computed - : indexOf(seen, computed) < 0 - ) { - if (callback || isLarge) { - seen.push(computed); - } - result.push(value); - } - } - if (isLarge) { - releaseArray(seen.array); - releaseObject(seen); - } else if (callback) { - releaseArray(seen); - } - return result; - } - - /** - * Creates a function that aggregates a collection, creating an object composed - * of keys generated from the results of running each element of the collection - * through a callback. The given `setter` function sets the keys and values - * of the composed object. - * - * @private - * @param {Function} setter The setter function. - * @returns {Function} Returns the new aggregator function. - */ - function createAggregator(setter) { - return function(collection, callback, thisArg) { - var result = {}; - callback = lodash.createCallback(callback, thisArg, 3); - - if (isArray(collection)) { - var index = -1, - length = collection.length; - - while (++index < length) { - var value = collection[index]; - setter(result, value, callback(value, index, collection), collection); - } - } else { - baseEach(collection, function(value, key, collection) { - setter(result, value, callback(value, key, collection), collection); - }); - } - return result; - }; - } - - /** - * Creates a function that, when called, either curries or invokes `func` - * with an optional `this` binding and partially applied arguments. - * - * @private - * @param {Function|string} func The function or method name to reference. - * @param {number} bitmask The bitmask of method flags to compose. - * The bitmask may be composed of the following flags: - * 1 - `_.bind` - * 2 - `_.bindKey` - * 4 - `_.curry` - * 8 - `_.curry` (bound) - * 16 - `_.partial` - * 32 - `_.partialRight` - * @param {Array} [partialArgs] An array of arguments to prepend to those - * provided to the new function. - * @param {Array} [partialRightArgs] An array of arguments to append to those - * provided to the new function. - * @param {*} [thisArg] The `this` binding of `func`. - * @param {number} [arity] The arity of `func`. - * @returns {Function} Returns the new function. - */ - function createWrapper(func, bitmask, partialArgs, partialRightArgs, thisArg, arity) { - var isBind = bitmask & 1, - isBindKey = bitmask & 2, - isCurry = bitmask & 4, - isCurryBound = bitmask & 8, - isPartial = bitmask & 16, - isPartialRight = bitmask & 32; - - if (!isBindKey && !isFunction(func)) { - throw new TypeError; - } - if (isPartial && !partialArgs.length) { - bitmask &= ~16; - isPartial = partialArgs = false; - } - if (isPartialRight && !partialRightArgs.length) { - bitmask &= ~32; - isPartialRight = partialRightArgs = false; - } - var bindData = func && func.__bindData__; - if (bindData && bindData !== true) { - // clone `bindData` - bindData = slice(bindData); - if (bindData[2]) { - bindData[2] = slice(bindData[2]); - } - if (bindData[3]) { - bindData[3] = slice(bindData[3]); - } - // set `thisBinding` is not previously bound - if (isBind && !(bindData[1] & 1)) { - bindData[4] = thisArg; - } - // set if previously bound but not currently (subsequent curried functions) - if (!isBind && bindData[1] & 1) { - bitmask |= 8; - } - // set curried arity if not yet set - if (isCurry && !(bindData[1] & 4)) { - bindData[5] = arity; - } - // append partial left arguments - if (isPartial) { - push.apply(bindData[2] || (bindData[2] = []), partialArgs); - } - // append partial right arguments - if (isPartialRight) { - unshift.apply(bindData[3] || (bindData[3] = []), partialRightArgs); - } - // merge flags - bindData[1] |= bitmask; - return createWrapper.apply(null, bindData); - } - // fast path for `_.bind` - var creater = (bitmask == 1 || bitmask === 17) ? baseBind : baseCreateWrapper; - return creater([func, bitmask, partialArgs, partialRightArgs, thisArg, arity]); - } - - /** - * Creates compiled iteration functions. - * - * @private - * @param {...Object} [options] The compile options object(s). - * @param {string} [options.array] Code to determine if the iterable is an array or array-like. - * @param {boolean} [options.useHas] Specify using `hasOwnProperty` checks in the object loop. - * @param {Function} [options.keys] A reference to `_.keys` for use in own property iteration. - * @param {string} [options.args] A comma separated string of iteration function arguments. - * @param {string} [options.top] Code to execute before the iteration branches. - * @param {string} [options.loop] Code to execute in the object loop. - * @param {string} [options.bottom] Code to execute after the iteration branches. - * @returns {Function} Returns the compiled function. - */ - function createIterator() { - // data properties - iteratorData.shadowedProps = shadowedProps; - - // iterator options - iteratorData.array = iteratorData.bottom = iteratorData.loop = iteratorData.top = ''; - iteratorData.init = 'iterable'; - iteratorData.useHas = true; - - // merge options into a template data object - for (var object, index = 0; object = arguments[index]; index++) { - for (var key in object) { - iteratorData[key] = object[key]; - } - } - var args = iteratorData.args; - iteratorData.firstArg = /^[^,]+/.exec(args)[0]; - - // create the function factory - var factory = Function( - 'baseCreateCallback, errorClass, errorProto, hasOwnProperty, ' + - 'indicatorObject, isArguments, isArray, isString, keys, objectProto, ' + - 'objectTypes, nonEnumProps, stringClass, stringProto, toString', - 'return function(' + args + ') {\n' + iteratorTemplate(iteratorData) + '\n}' - ); - - // return the compiled function - return factory( - baseCreateCallback, errorClass, errorProto, hasOwnProperty, - indicatorObject, isArguments, isArray, isString, iteratorData.keys, objectProto, - objectTypes, nonEnumProps, stringClass, stringProto, toString - ); - } - - /** - * Used by `escape` to convert characters to HTML entities. - * - * @private - * @param {string} match The matched character to escape. - * @returns {string} Returns the escaped character. - */ - function escapeHtmlChar(match) { - return htmlEscapes[match]; - } - - /** - * Gets the appropriate "indexOf" function. If the `_.indexOf` method is - * customized, this method returns the custom method, otherwise it returns - * the `baseIndexOf` function. - * - * @private - * @returns {Function} Returns the "indexOf" function. - */ - function getIndexOf() { - var result = (result = lodash.indexOf) === indexOf ? baseIndexOf : result; - return result; - } - - /** - * Checks if `value` is a native function. - * - * @private - * @param {*} value The value to check. - * @returns {boolean} Returns `true` if the `value` is a native function, else `false`. - */ - function isNative(value) { - return typeof value == 'function' && reNative.test(value); - } - - /** - * Sets `this` binding data on a given function. - * - * @private - * @param {Function} func The function to set data on. - * @param {Array} value The data array to set. - */ - var setBindData = !defineProperty ? noop : function(func, value) { - descriptor.value = value; - defineProperty(func, '__bindData__', descriptor); - }; - - /** - * A fallback implementation of `isPlainObject` which 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 {*} value The value to check. - * @returns {boolean} Returns `true` if `value` is a plain object, else `false`. - */ - function shimIsPlainObject(value) { - var ctor, - result; - - // avoid non Object objects, `arguments` objects, and DOM elements - if (!(value && toString.call(value) == objectClass) || - (ctor = value.constructor, isFunction(ctor) && !(ctor instanceof ctor)) || - (!support.argsClass && isArguments(value)) || - (!support.nodeClass && isNode(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. - if (support.ownLast) { - forIn(value, function(value, 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. - forIn(value, function(value, key) { - result = key; - }); - return typeof result == 'undefined' || hasOwnProperty.call(value, result); - } - - /** - * Used by `unescape` to convert HTML entities to characters. - * - * @private - * @param {string} match The matched character to unescape. - * @returns {string} Returns the unescaped character. - */ - function unescapeHtmlChar(match) { - return htmlUnescapes[match]; - } - - /*--------------------------------------------------------------------------*/ - - /** - * Checks if `value` is an `arguments` object. - * - * @static - * @memberOf _ - * @category Objects - * @param {*} 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 value && typeof value == 'object' && typeof value.length == 'number' && - toString.call(value) == argsClass || false; - } - // fallback for browsers that can't detect `arguments` objects by [[Class]] - if (!support.argsClass) { - isArguments = function(value) { - return value && typeof value == 'object' && typeof value.length == 'number' && - hasOwnProperty.call(value, 'callee') && !propertyIsEnumerable.call(value, 'callee') || false; - }; - } - - /** - * Checks if `value` is an array. - * - * @static - * @memberOf _ - * @type Function - * @category Objects - * @param {*} value The value to check. - * @returns {boolean} Returns `true` if the `value` is an array, else `false`. - * @example - * - * (function() { return _.isArray(arguments); })(); - * // => false - * - * _.isArray([1, 2, 3]); - * // => true - */ - var isArray = nativeIsArray || function(value) { - return value && typeof value == 'object' && typeof value.length == 'number' && - toString.call(value) == arrayClass || false; - }; - - /** - * A fallback implementation of `Object.keys` which produces an array of the - * given object's own enumerable property names. - * - * @private - * @type Function - * @param {Object} object The object to inspect. - * @returns {Array} Returns an array of property names. - */ - var shimKeys = createIterator({ - 'args': 'object', - 'init': '[]', - 'top': 'if (!(objectTypes[typeof object])) return result', - 'loop': 'result.push(index)' - }); - - /** - * Creates an array composed of the own enumerable property names of an object. - * - * @static - * @memberOf _ - * @category Objects - * @param {Object} object The object to inspect. - * @returns {Array} Returns an array of property names. - * @example - * - * _.keys({ 'one': 1, 'two': 2, 'three': 3 }); - * // => ['one', 'two', 'three'] (property order is not guaranteed across environments) - */ - var keys = !nativeKeys ? shimKeys : function(object) { - if (!isObject(object)) { - return []; - } - if ((support.enumPrototypes && typeof object == 'function') || - (support.nonEnumArgs && object.length && isArguments(object))) { - return shimKeys(object); - } - return nativeKeys(object); - }; - - /** Reusable iterator options shared by `each`, `forIn`, and `forOwn` */ - var eachIteratorOptions = { - 'args': 'collection, callback, thisArg', - 'top': "callback = callback && typeof thisArg == 'undefined' ? callback : baseCreateCallback(callback, thisArg, 3)", - 'array': "typeof length == 'number'", - 'keys': keys, - 'loop': 'if (callback(iterable[index], index, collection) === false) return result' - }; - - /** Reusable iterator options for `assign` and `defaults` */ - var defaultsIteratorOptions = { - 'args': 'object, source, guard', - 'top': - 'var args = arguments,\n' + - ' argsIndex = 0,\n' + - " argsLength = typeof guard == 'number' ? 2 : args.length;\n" + - 'while (++argsIndex < argsLength) {\n' + - ' iterable = args[argsIndex];\n' + - ' if (iterable && objectTypes[typeof iterable]) {', - 'keys': keys, - 'loop': "if (typeof result[index] == 'undefined') result[index] = iterable[index]", - 'bottom': ' }\n}' - }; - - /** Reusable iterator options for `forIn` and `forOwn` */ - var forOwnIteratorOptions = { - 'top': 'if (!objectTypes[typeof iterable]) return result;\n' + eachIteratorOptions.top, - 'array': false - }; - - /** - * Used to convert characters to HTML entities: - * - * 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") - */ - var htmlEscapes = { - '&': '&', - '<': '<', - '>': '>', - '"': '"', - "'": ''' - }; - - /** Used to convert HTML entities to characters */ - var htmlUnescapes = invert(htmlEscapes); - - /** Used to match HTML entities and HTML characters */ - var reEscapedHtml = RegExp('(' + keys(htmlUnescapes).join('|') + ')', 'g'), - reUnescapedHtml = RegExp('[' + keys(htmlEscapes).join('') + ']', 'g'); - - /** - * 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`. - * - * @private - * @type Function - * @param {Array|Object|string} collection The collection to iterate over. - * @param {Function} [callback=identity] The function called per iteration. - * @param {*} [thisArg] The `this` binding of `callback`. - * @returns {Array|Object|string} Returns `collection`. - */ - var baseEach = createIterator(eachIteratorOptions); - - /*--------------------------------------------------------------------------*/ - - /** - * Assigns own enumerable properties of source object(s) to the destination - * object. Subsequent sources will overwrite property assignments of previous - * sources. If a callback is provided it will be executed to produce the - * assigned values. The callback is bound to `thisArg` and invoked with two - * arguments; (objectValue, sourceValue). - * - * @static - * @memberOf _ - * @type Function - * @alias extend - * @category Objects - * @param {Object} object The destination object. - * @param {...Object} [source] The source objects. - * @param {Function} [callback] The function to customize assigning values. - * @param {*} [thisArg] The `this` binding of `callback`. - * @returns {Object} Returns the destination object. - * @example - * - * _.assign({ 'name': 'fred' }, { 'employer': 'slate' }); - * // => { 'name': 'fred', 'employer': 'slate' } - * - * var defaults = _.partialRight(_.assign, function(a, b) { - * return typeof a == 'undefined' ? b : a; - * }); - * - * var object = { 'name': 'barney' }; - * defaults(object, { 'name': 'fred', 'employer': 'slate' }); - * // => { 'name': 'barney', 'employer': 'slate' } - */ - var assign = createIterator(defaultsIteratorOptions, { - 'top': - defaultsIteratorOptions.top.replace(';', - ';\n' + - "if (argsLength > 3 && typeof args[argsLength - 2] == 'function') {\n" + - ' var callback = baseCreateCallback(args[--argsLength - 1], args[argsLength--], 2);\n' + - "} else if (argsLength > 2 && typeof args[argsLength - 1] == 'function') {\n" + - ' callback = args[--argsLength];\n' + - '}' - ), - 'loop': 'result[index] = callback ? callback(result[index], iterable[index]) : iterable[index]' - }); - - /** - * Creates a clone of `value`. If `isDeep` is `true` nested objects will also - * be cloned, otherwise they will be assigned by reference. If a callback - * is provided it will be executed to produce the cloned values. If the - * callback returns `undefined` cloning will be handled by the method instead. - * The callback is bound to `thisArg` and invoked with one argument; (value). - * - * @static - * @memberOf _ - * @category Objects - * @param {*} value The value to clone. - * @param {boolean} [isDeep=false] Specify a deep clone. - * @param {Function} [callback] The function to customize cloning values. - * @param {*} [thisArg] The `this` binding of `callback`. - * @returns {*} Returns the cloned value. - * @example - * - * var characters = [ - * { 'name': 'barney', 'age': 36 }, - * { 'name': 'fred', 'age': 40 } - * ]; - * - * var shallow = _.clone(characters); - * shallow[0] === characters[0]; - * // => true - * - * var deep = _.clone(characters, true); - * deep[0] === characters[0]; - * // => false - * - * _.mixin({ - * 'clone': _.partialRight(_.clone, function(value) { - * return _.isElement(value) ? value.cloneNode(false) : undefined; - * }) - * }); - * - * var clone = _.clone(document.body); - * clone.childNodes.length; - * // => 0 - */ - function clone(value, isDeep, callback, thisArg) { - // allows working with "Collections" methods without using their `index` - // and `collection` arguments for `isDeep` and `callback` - if (typeof isDeep != 'boolean' && isDeep != null) { - thisArg = callback; - callback = isDeep; - isDeep = false; - } - return baseClone(value, isDeep, typeof callback == 'function' && baseCreateCallback(callback, thisArg, 1)); - } - - /** - * Creates a deep clone of `value`. If a callback is provided it will be - * executed to produce the cloned values. If the callback returns `undefined` - * cloning will be handled by the method instead. The callback is bound to - * `thisArg` and invoked with one argument; (value). - * - * Note: This method is loosely based on the structured clone algorithm. 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. - * See http://www.w3.org/TR/html5/infrastructure.html#internal-structured-cloning-algorithm. - * - * @static - * @memberOf _ - * @category Objects - * @param {*} value The value to deep clone. - * @param {Function} [callback] The function to customize cloning values. - * @param {*} [thisArg] The `this` binding of `callback`. - * @returns {*} Returns the deep cloned value. - * @example - * - * var characters = [ - * { 'name': 'barney', 'age': 36 }, - * { 'name': 'fred', 'age': 40 } - * ]; - * - * var deep = _.cloneDeep(characters); - * deep[0] === characters[0]; - * // => false - * - * var view = { - * 'label': 'docs', - * 'node': element - * }; - * - * var clone = _.cloneDeep(view, function(value) { - * return _.isElement(value) ? value.cloneNode(true) : undefined; - * }); - * - * clone.node == view.node; - * // => false - */ - function cloneDeep(value, callback, thisArg) { - return baseClone(value, true, typeof callback == 'function' && baseCreateCallback(callback, thisArg, 1)); - } - - /** - * Creates an object that inherits from the given `prototype` object. If a - * `properties` object is provided its own enumerable properties are assigned - * to the created object. - * - * @static - * @memberOf _ - * @category Objects - * @param {Object} prototype The object to inherit from. - * @param {Object} [properties] The properties to assign to the object. - * @returns {Object} Returns the new object. - * @example - * - * function Shape() { - * this.x = 0; - * this.y = 0; - * } - * - * function Circle() { - * Shape.call(this); - * } - * - * Circle.prototype = _.create(Shape.prototype, { 'constructor': Circle }); - * - * var circle = new Circle; - * circle instanceof Circle; - * // => true - * - * circle instanceof Shape; - * // => true - */ - function create(prototype, properties) { - var result = baseCreate(prototype); - return properties ? assign(result, properties) : result; - } - - /** - * Assigns own enumerable properties of source object(s) to the destination - * object for all destination properties that resolve to `undefined`. Once a - * property is set, additional defaults of the same property will be ignored. - * - * @static - * @memberOf _ - * @type Function - * @category Objects - * @param {Object} object The destination object. - * @param {...Object} [source] The source objects. - * @param- {Object} [guard] Allows working with `_.reduce` without using its - * `key` and `object` arguments as sources. - * @returns {Object} Returns the destination object. - * @example - * - * var object = { 'name': 'barney' }; - * _.defaults(object, { 'name': 'fred', 'employer': 'slate' }); - * // => { 'name': 'barney', 'employer': 'slate' } - */ - var defaults = createIterator(defaultsIteratorOptions); - - /** - * This method is like `_.findIndex` except that it returns the key of the - * first element that passes the callback check, instead of the element itself. - * - * If a property name is provided for `callback` the created "_.pluck" style - * callback will return the property value of the given element. - * - * If an object is provided for `callback` the created "_.where" style callback - * will return `true` for elements that have the properties of the given object, - * else `false`. - * - * @static - * @memberOf _ - * @category Objects - * @param {Object} object The object to search. - * @param {Function|Object|string} [callback=identity] The function called per - * iteration. If a property name or object is provided it will be used to - * create a "_.pluck" or "_.where" style callback, respectively. - * @param {*} [thisArg] The `this` binding of `callback`. - * @returns {string|undefined} Returns the key of the found element, else `undefined`. - * @example - * - * var characters = { - * 'barney': { 'age': 36, 'blocked': false }, - * 'fred': { 'age': 40, 'blocked': true }, - * 'pebbles': { 'age': 1, 'blocked': false } - * }; - * - * _.findKey(characters, function(chr) { - * return chr.age < 40; - * }); - * // => 'barney' (property order is not guaranteed across environments) - * - * // using "_.where" callback shorthand - * _.findKey(characters, { 'age': 1 }); - * // => 'pebbles' - * - * // using "_.pluck" callback shorthand - * _.findKey(characters, 'blocked'); - * // => 'fred' - */ - function findKey(object, callback, thisArg) { - var result; - callback = lodash.createCallback(callback, thisArg, 3); - forOwn(object, function(value, key, object) { - if (callback(value, key, object)) { - result = key; - return false; - } - }); - return result; - } - - /** - * This method is like `_.findKey` except that it iterates over elements - * of a `collection` in the opposite order. - * - * If a property name is provided for `callback` the created "_.pluck" style - * callback will return the property value of the given element. - * - * If an object is provided for `callback` the created "_.where" style callback - * will return `true` for elements that have the properties of the given object, - * else `false`. - * - * @static - * @memberOf _ - * @category Objects - * @param {Object} object The object to search. - * @param {Function|Object|string} [callback=identity] The function called per - * iteration. If a property name or object is provided it will be used to - * create a "_.pluck" or "_.where" style callback, respectively. - * @param {*} [thisArg] The `this` binding of `callback`. - * @returns {string|undefined} Returns the key of the found element, else `undefined`. - * @example - * - * var characters = { - * 'barney': { 'age': 36, 'blocked': true }, - * 'fred': { 'age': 40, 'blocked': false }, - * 'pebbles': { 'age': 1, 'blocked': true } - * }; - * - * _.findLastKey(characters, function(chr) { - * return chr.age < 40; - * }); - * // => returns `pebbles`, assuming `_.findKey` returns `barney` - * - * // using "_.where" callback shorthand - * _.findLastKey(characters, { 'age': 40 }); - * // => 'fred' - * - * // using "_.pluck" callback shorthand - * _.findLastKey(characters, 'blocked'); - * // => 'pebbles' - */ - function findLastKey(object, callback, thisArg) { - var result; - callback = lodash.createCallback(callback, thisArg, 3); - forOwnRight(object, function(value, key, object) { - if (callback(value, key, object)) { - result = key; - return false; - } - }); - return result; - } - - /** - * Iterates over own and inherited enumerable properties of an object, - * 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 _ - * @type Function - * @category Objects - * @param {Object} object The object to iterate over. - * @param {Function} [callback=identity] The function called per iteration. - * @param {*} [thisArg] The `this` binding of `callback`. - * @returns {Object} Returns `object`. - * @example - * - * function Shape() { - * this.x = 0; - * this.y = 0; - * } - * - * Shape.prototype.move = function(x, y) { - * this.x += x; - * this.y += y; - * }; - * - * _.forIn(new Shape, function(value, key) { - * console.log(key); - * }); - * // => logs 'x', 'y', and 'move' (property order is not guaranteed across environments) - */ - var forIn = createIterator(eachIteratorOptions, forOwnIteratorOptions, { - 'useHas': false - }); - - /** - * This method is like `_.forIn` except that it iterates over elements - * of a `collection` in the opposite order. - * - * @static - * @memberOf _ - * @category Objects - * @param {Object} object The object to iterate over. - * @param {Function} [callback=identity] The function called per iteration. - * @param {*} [thisArg] The `this` binding of `callback`. - * @returns {Object} Returns `object`. - * @example - * - * function Shape() { - * this.x = 0; - * this.y = 0; - * } - * - * Shape.prototype.move = function(x, y) { - * this.x += x; - * this.y += y; - * }; - * - * _.forInRight(new Shape, function(value, key) { - * console.log(key); - * }); - * // => logs 'move', 'y', and 'x' assuming `_.forIn ` logs 'x', 'y', and 'move' - */ - function forInRight(object, callback, thisArg) { - var pairs = []; - - forIn(object, function(value, key) { - pairs.push(key, value); - }); - - var length = pairs.length; - callback = baseCreateCallback(callback, thisArg, 3); - while (length--) { - if (callback(pairs[length--], pairs[length], object) === false) { - break; - } - } - return object; - } - - /** - * Iterates over own enumerable properties of an object, 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 _ - * @type Function - * @category Objects - * @param {Object} object The object to iterate over. - * @param {Function} [callback=identity] The function called per iteration. - * @param {*} [thisArg] The `this` binding of `callback`. - * @returns {Object} Returns `object`. - * @example - * - * _.forOwn({ '0': 'zero', '1': 'one', 'length': 2 }, function(num, key) { - * console.log(key); - * }); - * // => logs '0', '1', and 'length' (property order is not guaranteed across environments) - */ - var forOwn = createIterator(eachIteratorOptions, forOwnIteratorOptions); - - /** - * This method is like `_.forOwn` except that it iterates over elements - * of a `collection` in the opposite order. - * - * @static - * @memberOf _ - * @category Objects - * @param {Object} object The object to iterate over. - * @param {Function} [callback=identity] The function called per iteration. - * @param {*} [thisArg] The `this` binding of `callback`. - * @returns {Object} Returns `object`. - * @example - * - * _.forOwnRight({ '0': 'zero', '1': 'one', 'length': 2 }, function(num, key) { - * console.log(key); - * }); - * // => logs 'length', '1', and '0' assuming `_.forOwn` logs '0', '1', and 'length' - */ - function forOwnRight(object, callback, thisArg) { - var props = keys(object), - length = props.length; - - callback = baseCreateCallback(callback, thisArg, 3); - while (length--) { - var key = props[length]; - if (callback(object[key], key, object) === false) { - break; - } - } - return object; - } - - /** - * Creates a sorted array of property names 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 an array of property names that have function values. - * @example - * - * _.functions(_); - * // => ['all', 'any', 'bind', 'bindAll', 'clone', 'compact', 'compose', ...] - */ - function functions(object) { - var result = []; - forIn(object, function(value, key) { - if (isFunction(value)) { - result.push(key); - } - }); - return result.sort(); - } - - /** - * Checks if the specified property name exists as a direct property of `object`, - * instead of an inherited property. - * - * @static - * @memberOf _ - * @category Objects - * @param {Object} object The object to inspect. - * @param {string} key The name of the property to check. - * @returns {boolean} Returns `true` if key is a direct property, else `false`. - * @example - * - * _.has({ 'a': 1, 'b': 2, 'c': 3 }, 'b'); - * // => true - */ - function has(object, key) { - return object ? hasOwnProperty.call(object, key) : false; - } - - /** - * Creates an object composed of the inverted keys and values of the given object. - * - * @static - * @memberOf _ - * @category Objects - * @param {Object} object The object to invert. - * @returns {Object} Returns the created inverted object. - * @example - * - * _.invert({ 'first': 'fred', 'second': 'barney' }); - * // => { 'fred': 'first', 'barney': 'second' } - */ - function invert(object) { - var index = -1, - props = keys(object), - length = props.length, - result = {}; - - while (++index < length) { - var key = props[index]; - result[object[key]] = key; - } - return result; - } - - /** - * Checks if `value` is a boolean value. - * - * @static - * @memberOf _ - * @category Objects - * @param {*} value The value to check. - * @returns {boolean} Returns `true` if the `value` is a boolean value, else `false`. - * @example - * - * _.isBoolean(null); - * // => false - */ - function isBoolean(value) { - return value === true || value === false || - value && typeof value == 'object' && toString.call(value) == boolClass || false; - } - - /** - * Checks if `value` is a date. - * - * @static - * @memberOf _ - * @category Objects - * @param {*} value The value to check. - * @returns {boolean} Returns `true` if the `value` is a date, else `false`. - * @example - * - * _.isDate(new Date); - * // => true - */ - function isDate(value) { - return value && typeof value == 'object' && toString.call(value) == dateClass || false; - } - - /** - * Checks if `value` is a DOM element. - * - * @static - * @memberOf _ - * @category Objects - * @param {*} value The value to check. - * @returns {boolean} Returns `true` if the `value` is a DOM element, else `false`. - * @example - * - * _.isElement(document.body); - * // => true - */ - function isElement(value) { - return value && value.nodeType === 1 || false; - } - - /** - * 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 - * - * _.isEmpty({}); - * // => true - * - * _.isEmpty(''); - * // => true - */ - function isEmpty(value) { - var result = true; - if (!value) { - return result; - } - var className = toString.call(value), - length = value.length; - - if ((className == arrayClass || className == stringClass || - (support.argsClass ? className == argsClass : isArguments(value))) || - (className == objectClass && typeof length == 'number' && isFunction(value.splice))) { - return !length; - } - forOwn(value, function() { - return (result = false); - }); - return result; - } - - /** - * Performs a deep comparison between two values to determine if they are - * equivalent to each other. If a callback is provided it will be executed - * to compare values. If the callback returns `undefined` comparisons will - * be handled by the method instead. The callback is bound to `thisArg` and - * invoked with two arguments; (a, b). - * - * @static - * @memberOf _ - * @category Objects - * @param {*} a The value to compare. - * @param {*} b The other value to compare. - * @param {Function} [callback] The function to customize comparing values. - * @param {*} [thisArg] The `this` binding of `callback`. - * @returns {boolean} Returns `true` if the values are equivalent, else `false`. - * @example - * - * var object = { 'name': 'fred' }; - * var copy = { 'name': 'fred' }; - * - * object == copy; - * // => false - * - * _.isEqual(object, copy); - * // => true - * - * var words = ['hello', 'goodbye']; - * var otherWords = ['hi', 'goodbye']; - * - * _.isEqual(words, otherWords, function(a, b) { - * var reGreet = /^(?:hello|hi)$/i, - * aGreet = _.isString(a) && reGreet.test(a), - * bGreet = _.isString(b) && reGreet.test(b); - * - * return (aGreet || bGreet) ? (aGreet == bGreet) : undefined; - * }); - * // => true - */ - function isEqual(a, b, callback, thisArg) { - return baseIsEqual(a, b, typeof callback == 'function' && baseCreateCallback(callback, thisArg, 2)); - } - - /** - * 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.io/#x15.1.2.5. - * - * @static - * @memberOf _ - * @category Objects - * @param {*} value The value to check. - * @returns {boolean} Returns `true` if the `value` is finite, else `false`. - * @example - * - * _.isFinite(-101); - * // => true - * - * _.isFinite('10'); - * // => true - * - * _.isFinite(true); - * // => false - * - * _.isFinite(''); - * // => false - * - * _.isFinite(Infinity); - * // => false - */ - function isFinite(value) { - return nativeIsFinite(value) && !nativeIsNaN(parseFloat(value)); - } - - /** - * Checks if `value` is a function. - * - * @static - * @memberOf _ - * @category Objects - * @param {*} value The value to check. - * @returns {boolean} Returns `true` if the `value` is a function, else `false`. - * @example - * - * _.isFunction(_); - * // => true - */ - function isFunction(value) { - return typeof value == 'function'; - } - // fallback for older versions of Chrome and Safari - if (isFunction(/x/)) { - isFunction = function(value) { - return typeof value == 'function' && toString.call(value) == funcClass; - }; - } - - /** - * 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 {*} value The value to check. - * @returns {boolean} Returns `true` if the `value` is an object, else `false`. - * @example - * - * _.isObject({}); - * // => true - * - * _.isObject([1, 2, 3]); - * // => true - * - * _.isObject(1); - * // => false - */ - function isObject(value) { - // check if the value is the ECMAScript language type of Object - // http://es5.github.io/#x8 - // and avoid a V8 bug - // http://code.google.com/p/v8/issues/detail?id=2291 - return !!(value && objectTypes[typeof value]); - } - - /** - * Checks if `value` is `NaN`. - * - * Note: This is not the same as native `isNaN` which will return `true` for - * `undefined` and other non-numeric values. See http://es5.github.io/#x15.1.2.4. - * - * @static - * @memberOf _ - * @category Objects - * @param {*} value The value to check. - * @returns {boolean} Returns `true` if the `value` is `NaN`, else `false`. - * @example - * - * _.isNaN(NaN); - * // => true - * - * _.isNaN(new Number(NaN)); - * // => true - * - * isNaN(undefined); - * // => true - * - * _.isNaN(undefined); - * // => false - */ - 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; - } - - /** - * Checks if `value` is `null`. - * - * @static - * @memberOf _ - * @category Objects - * @param {*} 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; - } - - /** - * Checks if `value` is a number. - * - * Note: `NaN` is considered a number. See http://es5.github.io/#x8.5. - * - * @static - * @memberOf _ - * @category Objects - * @param {*} 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' || - value && typeof value == 'object' && toString.call(value) == numberClass || false; - } - - /** - * Checks if `value` is an object created by the `Object` constructor. - * - * @static - * @memberOf _ - * @category Objects - * @param {*} value The value to check. - * @returns {boolean} Returns `true` if `value` is a plain object, else `false`. - * @example - * - * function Shape() { - * this.x = 0; - * this.y = 0; - * } - * - * _.isPlainObject(new Shape); - * // => false - * - * _.isPlainObject([1, 2, 3]); - * // => false - * - * _.isPlainObject({ 'x': 0, 'y': 0 }); - * // => true - */ - var isPlainObject = !getPrototypeOf ? shimIsPlainObject : function(value) { - if (!(value && toString.call(value) == objectClass) || (!support.argsClass && isArguments(value))) { - return false; - } - var valueOf = value.valueOf, - objProto = isNative(valueOf) && (objProto = getPrototypeOf(valueOf)) && getPrototypeOf(objProto); - - return objProto - ? (value == objProto || getPrototypeOf(value) == objProto) - : shimIsPlainObject(value); - }; - - /** - * Checks if `value` is a regular expression. - * - * @static - * @memberOf _ - * @category Objects - * @param {*} value The value to check. - * @returns {boolean} Returns `true` if the `value` is a regular expression, else `false`. - * @example - * - * _.isRegExp(/fred/); - * // => true - */ - function isRegExp(value) { - return value && objectTypes[typeof value] && toString.call(value) == regexpClass || false; - } - - /** - * Checks if `value` is a string. - * - * @static - * @memberOf _ - * @category Objects - * @param {*} value The value to check. - * @returns {boolean} Returns `true` if the `value` is a string, else `false`. - * @example - * - * _.isString('fred'); - * // => true - */ - function isString(value) { - return typeof value == 'string' || - value && typeof value == 'object' && toString.call(value) == stringClass || false; - } - - /** - * Checks if `value` is `undefined`. - * - * @static - * @memberOf _ - * @category Objects - * @param {*} value The value to check. - * @returns {boolean} Returns `true` if the `value` is `undefined`, else `false`. - * @example - * - * _.isUndefined(void 0); - * // => true - */ - function isUndefined(value) { - return typeof value == 'undefined'; - } - - /** - * Creates an object with the same keys as `object` and values generated by - * running each own enumerable property of `object` through the callback. - * The callback is bound to `thisArg` and invoked with three arguments; - * (value, key, object). - * - * If a property name is provided for `callback` the created "_.pluck" style - * callback will return the property value of the given element. - * - * If an object is provided for `callback` the created "_.where" style callback - * will return `true` for elements that have the properties of the given object, - * else `false`. - * - * @static - * @memberOf _ - * @category Objects - * @param {Object} object The object to iterate over. - * @param {Function|Object|string} [callback=identity] The function called - * per iteration. If a property name or object is provided it will be used - * to create a "_.pluck" or "_.where" style callback, respectively. - * @param {*} [thisArg] The `this` binding of `callback`. - * @returns {Array} Returns a new object with values of the results of each `callback` execution. - * @example - * - * _.mapValues({ 'a': 1, 'b': 2, 'c': 3} , function(num) { return num * 3; }); - * // => { 'a': 3, 'b': 6, 'c': 9 } - * - * var characters = { - * 'fred': { 'name': 'fred', 'age': 40 }, - * 'pebbles': { 'name': 'pebbles', 'age': 1 } - * }; - * - * // using "_.pluck" callback shorthand - * _.mapValues(characters, 'age'); - * // => { 'fred': 40, 'pebbles': 1 } - */ - function mapValues(object, callback, thisArg) { - var result = {}; - callback = lodash.createCallback(callback, thisArg, 3); - - forOwn(object, function(value, key, object) { - result[key] = callback(value, key, object); - }); - return result; - } - - /** - * Recursively merges own enumerable properties of the source object(s), that - * don't resolve to `undefined` into the destination object. Subsequent sources - * will overwrite property assignments of previous sources. If a callback is - * provided it will be executed to produce the merged values of the destination - * and source properties. If the callback returns `undefined` merging will - * be handled by the method instead. The callback is bound to `thisArg` and - * invoked with two arguments; (objectValue, sourceValue). - * - * @static - * @memberOf _ - * @category Objects - * @param {Object} object The destination object. - * @param {...Object} [source] The source objects. - * @param {Function} [callback] The function to customize merging properties. - * @param {*} [thisArg] The `this` binding of `callback`. - * @returns {Object} Returns the destination object. - * @example - * - * var names = { - * 'characters': [ - * { 'name': 'barney' }, - * { 'name': 'fred' } - * ] - * }; - * - * var ages = { - * 'characters': [ - * { 'age': 36 }, - * { 'age': 40 } - * ] - * }; - * - * _.merge(names, ages); - * // => { 'characters': [{ 'name': 'barney', 'age': 36 }, { 'name': 'fred', 'age': 40 }] } - * - * var food = { - * 'fruits': ['apple'], - * 'vegetables': ['beet'] - * }; - * - * var otherFood = { - * 'fruits': ['banana'], - * 'vegetables': ['carrot'] - * }; - * - * _.merge(food, otherFood, function(a, b) { - * return _.isArray(a) ? a.concat(b) : undefined; - * }); - * // => { 'fruits': ['apple', 'banana'], 'vegetables': ['beet', 'carrot] } - */ - function merge(object) { - var args = arguments, - length = 2; - - if (!isObject(object)) { - return object; - } - // allows working with `_.reduce` and `_.reduceRight` without using - // their `index` and `collection` arguments - if (typeof args[2] != 'number') { - length = args.length; - } - if (length > 3 && typeof args[length - 2] == 'function') { - var callback = baseCreateCallback(args[--length - 1], args[length--], 2); - } else if (length > 2 && typeof args[length - 1] == 'function') { - callback = args[--length]; - } - var sources = slice(arguments, 1, length), - index = -1, - stackA = getArray(), - stackB = getArray(); - - while (++index < length) { - baseMerge(object, sources[index], callback, stackA, stackB); - } - releaseArray(stackA); - releaseArray(stackB); - return object; - } - - /** - * 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 a callback is provided it will be executed for each - * property of `object` omitting the properties the callback returns truey - * 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|string[]} [callback] The properties to omit or the - * function called per iteration. - * @param {*} [thisArg] The `this` binding of `callback`. - * @returns {Object} Returns an object without the omitted properties. - * @example - * - * _.omit({ 'name': 'fred', 'age': 40 }, 'age'); - * // => { 'name': 'fred' } - * - * _.omit({ 'name': 'fred', 'age': 40 }, function(value) { - * return typeof value == 'number'; - * }); - * // => { 'name': 'fred' } - */ - function omit(object, callback, thisArg) { - var result = {}; - if (typeof callback != 'function') { - var props = []; - forIn(object, function(value, key) { - props.push(key); - }); - props = baseDifference(props, baseFlatten(arguments, true, false, 1)); - - var index = -1, - length = props.length; - - while (++index < length) { - var key = props[index]; - result[key] = object[key]; - } - } else { - callback = lodash.createCallback(callback, thisArg, 3); - forIn(object, function(value, key, object) { - if (!callback(value, key, object)) { - result[key] = value; - } - }); - } - return result; - } - - /** - * Creates a two dimensional array of an object's key-value pairs, - * i.e. `[[key1, value1], [key2, value2]]`. - * - * @static - * @memberOf _ - * @category Objects - * @param {Object} object The object to inspect. - * @returns {Array} Returns new array of key-value pairs. - * @example - * - * _.pairs({ 'barney': 36, 'fred': 40 }); - * // => [['barney', 36], ['fred', 40]] (property order is not guaranteed across environments) - */ - function pairs(object) { - var index = -1, - props = keys(object), - length = props.length, - result = Array(length); - - while (++index < length) { - var key = props[index]; - result[index] = [key, object[key]]; - } - return 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 a callback is provided it will be executed for each - * property of `object` picking the properties the callback returns truey - * 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|string[]} [callback] The function called per - * iteration or property names to pick, specified as individual property - * names or arrays of property names. - * @param {*} [thisArg] The `this` binding of `callback`. - * @returns {Object} Returns an object composed of the picked properties. - * @example - * - * _.pick({ 'name': 'fred', '_userid': 'fred1' }, 'name'); - * // => { 'name': 'fred' } - * - * _.pick({ 'name': 'fred', '_userid': 'fred1' }, function(value, key) { - * return key.charAt(0) != '_'; - * }); - * // => { 'name': 'fred' } - */ - function pick(object, callback, thisArg) { - var result = {}; - if (typeof callback != 'function') { - var index = -1, - props = baseFlatten(arguments, true, false, 1), - length = isObject(object) ? props.length : 0; - - while (++index < length) { - var key = props[index]; - if (key in object) { - result[key] = object[key]; - } - } - } else { - callback = lodash.createCallback(callback, thisArg, 3); - forIn(object, function(value, key, object) { - if (callback(value, key, object)) { - result[key] = value; - } - }); - } - return result; - } - - /** - * An alternative to `_.reduce` this method transforms `object` to a new - * `accumulator` object which is the result of running each of its own - * enumerable properties through a callback, with each callback execution - * potentially mutating the `accumulator` object. The callback is bound to - * `thisArg` and invoked with four arguments; (accumulator, value, key, object). - * Callbacks may exit iteration early by explicitly returning `false`. - * - * @static - * @memberOf _ - * @category Objects - * @param {Array|Object} object The object to iterate over. - * @param {Function} [callback=identity] The function called per iteration. - * @param {*} [accumulator] The custom accumulator value. - * @param {*} [thisArg] The `this` binding of `callback`. - * @returns {*} Returns the accumulated value. - * @example - * - * var squares = _.transform([1, 2, 3, 4, 5, 6, 7, 8, 9, 10], function(result, num) { - * num *= num; - * if (num % 2) { - * return result.push(num) < 3; - * } - * }); - * // => [1, 9, 25] - * - * var mapped = _.transform({ 'a': 1, 'b': 2, 'c': 3 }, function(result, num, key) { - * result[key] = num * 3; - * }); - * // => { 'a': 3, 'b': 6, 'c': 9 } - */ - function transform(object, callback, accumulator, thisArg) { - var isArr = isArray(object); - if (accumulator == null) { - if (isArr) { - accumulator = []; - } else { - var ctor = object && object.constructor, - proto = ctor && ctor.prototype; - - accumulator = baseCreate(proto); - } - } - if (callback) { - callback = lodash.createCallback(callback, thisArg, 4); - (isArr ? baseEach : forOwn)(object, function(value, index, object) { - return callback(accumulator, value, index, object); - }); - } - return accumulator; - } - - /** - * 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 an array of property values. - * @example - * - * _.values({ 'one': 1, 'two': 2, 'three': 3 }); - * // => [1, 2, 3] (property order is not guaranteed across environments) - */ - function values(object) { - var index = -1, - props = keys(object), - length = props.length, - result = Array(length); - - while (++index < length) { - result[index] = object[props[index]]; - } - return result; - } - - /*--------------------------------------------------------------------------*/ - - /** - * Creates an array of elements from the specified indexes, or keys, of the - * `collection`. Indexes may be specified as individual arguments or as arrays - * of indexes. - * - * @static - * @memberOf _ - * @category Collections - * @param {Array|Object|string} collection The collection to iterate over. - * @param {...(number|number[]|string|string[])} [index] The indexes of `collection` - * to retrieve, specified as individual indexes or arrays of indexes. - * @returns {Array} Returns a new array of elements corresponding to the - * provided indexes. - * @example - * - * _.at(['a', 'b', 'c', 'd', 'e'], [0, 2, 4]); - * // => ['a', 'c', 'e'] - * - * _.at(['fred', 'barney', 'pebbles'], 0, 2); - * // => ['fred', 'pebbles'] - */ - function at(collection) { - var args = arguments, - index = -1, - props = baseFlatten(args, true, false, 1), - length = (args[2] && args[2][args[1]] === collection) ? 1 : props.length, - result = Array(length); - - if (support.unindexedChars && isString(collection)) { - collection = collection.split(''); - } - while(++index < length) { - result[index] = collection[props[index]]; - } - return result; - } - - /** - * Checks if a given value 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 {*} 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 - * - * _.contains([1, 2, 3], 1, 2); - * // => false - * - * _.contains({ 'name': 'fred', 'age': 40 }, 'fred'); - * // => true - * - * _.contains('pebbles', 'eb'); - * // => true - */ - function contains(collection, target, fromIndex) { - var index = -1, - indexOf = getIndexOf(), - length = collection ? collection.length : 0, - result = false; - - fromIndex = (fromIndex < 0 ? nativeMax(0, length + fromIndex) : fromIndex) || 0; - if (isArray(collection)) { - result = indexOf(collection, target, fromIndex) > -1; - } else if (typeof length == 'number') { - result = (isString(collection) ? collection.indexOf(target, fromIndex) : indexOf(collection, target, fromIndex)) > -1; - } else { - baseEach(collection, function(value) { - if (++index >= fromIndex) { - return !(result = value === target); - } - }); - } - return result; - } - - /** - * Creates an object composed of keys generated from the results of running - * each element of `collection` through the callback. The corresponding value - * of each key is the number of times the key was returned by the callback. - * The callback is bound to `thisArg` and invoked with three arguments; - * (value, index|key, collection). - * - * If a property name is provided for `callback` the created "_.pluck" style - * callback will return the property value of the given element. - * - * If an object is provided for `callback` the created "_.where" style callback - * will return `true` for elements that have the properties of the given object, - * else `false`. - * - * @static - * @memberOf _ - * @category Collections - * @param {Array|Object|string} collection The collection to iterate over. - * @param {Function|Object|string} [callback=identity] The function called - * per iteration. If a property name or object is provided it will be used - * to create a "_.pluck" or "_.where" style callback, respectively. - * @param {*} [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 } - * - * _.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 } - */ - var countBy = createAggregator(function(result, value, key) { - (hasOwnProperty.call(result, key) ? result[key]++ : result[key] = 1); - }); - - /** - * Checks if the given callback returns truey value for **all** elements of - * a collection. The callback is bound to `thisArg` and invoked with three - * arguments; (value, index|key, collection). - * - * If a property name is provided for `callback` the created "_.pluck" style - * callback will return the property value of the given element. - * - * If an object is provided for `callback` the created "_.where" style callback - * will return `true` for elements that have the properties of the given object, - * else `false`. - * - * @static - * @memberOf _ - * @alias all - * @category Collections - * @param {Array|Object|string} collection The collection to iterate over. - * @param {Function|Object|string} [callback=identity] The function called - * per iteration. If a property name or object is provided it will be used - * to create a "_.pluck" or "_.where" style callback, respectively. - * @param {*} [thisArg] The `this` binding of `callback`. - * @returns {boolean} Returns `true` if all elements passed the callback check, - * else `false`. - * @example - * - * _.every([true, 1, null, 'yes']); - * // => false - * - * var characters = [ - * { 'name': 'barney', 'age': 36 }, - * { 'name': 'fred', 'age': 40 } - * ]; - * - * // using "_.pluck" callback shorthand - * _.every(characters, 'age'); - * // => true - * - * // using "_.where" callback shorthand - * _.every(characters, { 'age': 36 }); - * // => false - */ - function every(collection, callback, thisArg) { - var result = true; - callback = lodash.createCallback(callback, thisArg, 3); - - if (isArray(collection)) { - var index = -1, - length = collection.length; - - while (++index < length) { - if (!(result = !!callback(collection[index], index, collection))) { - break; - } - } - } else { - baseEach(collection, function(value, index, collection) { - return (result = !!callback(value, index, collection)); - }); - } - return result; - } - - /** - * Iterates over elements of a collection, returning an array of all elements - * the callback returns truey for. The callback is bound to `thisArg` and - * invoked with three arguments; (value, index|key, collection). - * - * If a property name is provided for `callback` the created "_.pluck" style - * callback will return the property value of the given element. - * - * If an object is provided for `callback` the created "_.where" style callback - * will return `true` for elements that have the properties of the given object, - * else `false`. - * - * @static - * @memberOf _ - * @alias select - * @category Collections - * @param {Array|Object|string} collection The collection to iterate over. - * @param {Function|Object|string} [callback=identity] The function called - * per iteration. If a property name or object is provided it will be used - * to create a "_.pluck" or "_.where" style callback, respectively. - * @param {*} [thisArg] The `this` binding of `callback`. - * @returns {Array} Returns a new array of elements that passed the callback check. - * @example - * - * var evens = _.filter([1, 2, 3, 4, 5, 6], function(num) { return num % 2 == 0; }); - * // => [2, 4, 6] - * - * var characters = [ - * { 'name': 'barney', 'age': 36, 'blocked': false }, - * { 'name': 'fred', 'age': 40, 'blocked': true } - * ]; - * - * // using "_.pluck" callback shorthand - * _.filter(characters, 'blocked'); - * // => [{ 'name': 'fred', 'age': 40, 'blocked': true }] - * - * // using "_.where" callback shorthand - * _.filter(characters, { 'age': 36 }); - * // => [{ 'name': 'barney', 'age': 36, 'blocked': false }] - */ - function filter(collection, callback, thisArg) { - var result = []; - callback = lodash.createCallback(callback, thisArg, 3); - - if (isArray(collection)) { - var index = -1, - length = collection.length; - - while (++index < length) { - var value = collection[index]; - if (callback(value, index, collection)) { - result.push(value); - } - } - } else { - baseEach(collection, function(value, index, collection) { - if (callback(value, index, collection)) { - result.push(value); - } - }); - } - return result; - } - - /** - * Iterates over elements of a collection, returning the first element that - * the callback returns truey for. The callback is bound to `thisArg` and - * invoked with three arguments; (value, index|key, collection). - * - * If a property name is provided for `callback` the created "_.pluck" style - * callback will return the property value of the given element. - * - * If an object is provided for `callback` the created "_.where" style callback - * will return `true` for elements that have the properties of the given object, - * else `false`. - * - * @static - * @memberOf _ - * @alias detect, findWhere - * @category Collections - * @param {Array|Object|string} collection The collection to iterate over. - * @param {Function|Object|string} [callback=identity] The function called - * per iteration. If a property name or object is provided it will be used - * to create a "_.pluck" or "_.where" style callback, respectively. - * @param {*} [thisArg] The `this` binding of `callback`. - * @returns {*} Returns the found element, else `undefined`. - * @example - * - * var characters = [ - * { 'name': 'barney', 'age': 36, 'blocked': false }, - * { 'name': 'fred', 'age': 40, 'blocked': true }, - * { 'name': 'pebbles', 'age': 1, 'blocked': false } - * ]; - * - * _.find(characters, function(chr) { - * return chr.age < 40; - * }); - * // => { 'name': 'barney', 'age': 36, 'blocked': false } - * - * // using "_.where" callback shorthand - * _.find(characters, { 'age': 1 }); - * // => { 'name': 'pebbles', 'age': 1, 'blocked': false } - * - * // using "_.pluck" callback shorthand - * _.find(characters, 'blocked'); - * // => { 'name': 'fred', 'age': 40, 'blocked': true } - */ - function find(collection, callback, thisArg) { - callback = lodash.createCallback(callback, thisArg, 3); - - if (isArray(collection)) { - var index = -1, - length = collection.length; - - while (++index < length) { - var value = collection[index]; - if (callback(value, index, collection)) { - return value; - } - } - } else { - var result; - baseEach(collection, function(value, index, collection) { - if (callback(value, index, collection)) { - result = value; - return false; - } - }); - return result; - } - } - - /** - * This method is like `_.find` except that it iterates over elements - * of a `collection` from right to left. - * - * @static - * @memberOf _ - * @category Collections - * @param {Array|Object|string} collection The collection to iterate over. - * @param {Function|Object|string} [callback=identity] The function called - * per iteration. If a property name or object is provided it will be used - * to create a "_.pluck" or "_.where" style callback, respectively. - * @param {*} [thisArg] The `this` binding of `callback`. - * @returns {*} Returns the found element, else `undefined`. - * @example - * - * _.findLast([1, 2, 3, 4], function(num) { - * return num % 2 == 1; - * }); - * // => 3 - */ - function findLast(collection, callback, thisArg) { - var result; - callback = lodash.createCallback(callback, thisArg, 3); - forEachRight(collection, function(value, index, collection) { - if (callback(value, index, collection)) { - result = value; - return false; - } - }); - return result; - } - - /** - * Iterates over elements of a collection, executing the callback for each - * element. The callback is bound to `thisArg` and invoked with three arguments; - * (value, index|key, collection). Callbacks may exit iteration early by - * explicitly returning `false`. - * - * Note: As with other "Collections" methods, objects with a `length` property - * are iterated like arrays. To avoid this behavior `_.forIn` or `_.forOwn` - * may be used for object iteration. - * - * @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 {*} [thisArg] The `this` binding of `callback`. - * @returns {Array|Object|string} Returns `collection`. - * @example - * - * _([1, 2, 3]).forEach(function(num) { console.log(num); }).join(','); - * // => logs each number and returns '1,2,3' - * - * _.forEach({ 'one': 1, 'two': 2, 'three': 3 }, function(num) { console.log(num); }); - * // => logs each number and returns the object (property order is not guaranteed across environments) - */ - 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; - } - } - } else { - baseEach(collection, callback, thisArg); - } - return collection; - } - - /** - * This method is like `_.forEach` except that it iterates over elements - * of a `collection` from right to left. - * - * @static - * @memberOf _ - * @alias eachRight - * @category Collections - * @param {Array|Object|string} collection The collection to iterate over. - * @param {Function} [callback=identity] The function called per iteration. - * @param {*} [thisArg] The `this` binding of `callback`. - * @returns {Array|Object|string} Returns `collection`. - * @example - * - * _([1, 2, 3]).forEachRight(function(num) { console.log(num); }).join(','); - * // => logs each number from right to left and returns '3,2,1' - */ - function forEachRight(collection, callback, thisArg) { - var iterable = collection, - length = collection ? collection.length : 0; - - callback = callback && typeof thisArg == 'undefined' ? callback : baseCreateCallback(callback, thisArg, 3); - if (isArray(collection)) { - while (length--) { - if (callback(collection[length], length, collection) === false) { - break; - } - } - } else { - if (typeof length != 'number') { - var props = keys(collection); - length = props.length; - } else if (support.unindexedChars && isString(collection)) { - iterable = collection.split(''); - } - baseEach(collection, function(value, key, collection) { - key = props ? props[--length] : --length; - return callback(iterable[key], key, collection); - }); - } - return collection; - } - - /** - * Creates an object composed of keys generated from the results of running - * each element of a collection through the callback. The corresponding value - * of each key is an array of the elements responsible for generating the key. - * The callback is bound to `thisArg` and invoked with three arguments; - * (value, index|key, collection). - * - * If a property name is provided for `callback` the created "_.pluck" style - * callback will return the property value of the given element. - * - * If an object is provided for `callback` the created "_.where" style callback - * will return `true` for elements that have the properties of the given object, - * else `false` - * - * @static - * @memberOf _ - * @category Collections - * @param {Array|Object|string} collection The collection to iterate over. - * @param {Function|Object|string} [callback=identity] The function called - * per iteration. If a property name or object is provided it will be used - * to create a "_.pluck" or "_.where" style callback, respectively. - * @param {*} [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] } - * - * // using "_.pluck" callback shorthand - * _.groupBy(['one', 'two', 'three'], 'length'); - * // => { '3': ['one', 'two'], '5': ['three'] } - */ - var groupBy = createAggregator(function(result, value, key) { - (hasOwnProperty.call(result, key) ? result[key] : result[key] = []).push(value); - }); - - /** - * Creates an object composed of keys generated from the results of running - * each element of the collection through the given callback. The corresponding - * value of each key is the last element responsible for generating the key. - * The callback is bound to `thisArg` and invoked with three arguments; - * (value, index|key, collection). - * - * If a property name is provided for `callback` the created "_.pluck" style - * callback will return the property value of the given element. - * - * If an object is provided for `callback` the created "_.where" style callback - * will return `true` for elements that have the properties of the given object, - * else `false`. - * - * @static - * @memberOf _ - * @category Collections - * @param {Array|Object|string} collection The collection to iterate over. - * @param {Function|Object|string} [callback=identity] The function called - * per iteration. If a property name or object is provided it will be used - * to create a "_.pluck" or "_.where" style callback, respectively. - * @param {*} [thisArg] The `this` binding of `callback`. - * @returns {Object} Returns the composed aggregate object. - * @example - * - * var keys = [ - * { 'dir': 'left', 'code': 97 }, - * { 'dir': 'right', 'code': 100 } - * ]; - * - * _.indexBy(keys, 'dir'); - * // => { 'left': { 'dir': 'left', 'code': 97 }, 'right': { 'dir': 'right', 'code': 100 } } - * - * _.indexBy(keys, function(key) { return String.fromCharCode(key.code); }); - * // => { 'a': { 'dir': 'left', 'code': 97 }, 'd': { 'dir': 'right', 'code': 100 } } - * - * _.indexBy(characters, function(key) { this.fromCharCode(key.code); }, String); - * // => { 'a': { 'dir': 'left', 'code': 97 }, 'd': { 'dir': 'right', 'code': 100 } } - */ - var indexBy = createAggregator(function(result, value, key) { - result[key] = value; - }); - - /** - * 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 provided 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 {...*} [arg] 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]] - * - * _.invoke([123, 456], String.prototype.split, ''); - * // => [['1', '2', '3'], ['4', '5', '6']] - */ - function invoke(collection, methodName) { - var args = slice(arguments, 2), - index = -1, - isFunc = typeof methodName == 'function', - length = collection ? collection.length : 0, - result = Array(typeof length == 'number' ? length : 0); - - forEach(collection, function(value) { - result[++index] = (isFunc ? methodName : value[methodName]).apply(value, args); - }); - return result; - } - - /** - * Creates an array of values by running each element in the collection - * through the callback. The callback is bound to `thisArg` and invoked with - * three arguments; (value, index|key, collection). - * - * If a property name is provided for `callback` the created "_.pluck" style - * callback will return the property value of the given element. - * - * If an object is provided for `callback` the created "_.where" style callback - * will return `true` for elements that have the properties of the given object, - * else `false`. - * - * @static - * @memberOf _ - * @alias collect - * @category Collections - * @param {Array|Object|string} collection The collection to iterate over. - * @param {Function|Object|string} [callback=identity] The function called - * per iteration. If a property name or object is provided it will be used - * to create a "_.pluck" or "_.where" style callback, respectively. - * @param {*} [thisArg] The `this` binding of `callback`. - * @returns {Array} Returns a new array of the results of each `callback` execution. - * @example - * - * _.map([1, 2, 3], function(num) { return num * 3; }); - * // => [3, 6, 9] - * - * _.map({ 'one': 1, 'two': 2, 'three': 3 }, function(num) { return num * 3; }); - * // => [3, 6, 9] (property order is not guaranteed across environments) - * - * var characters = [ - * { 'name': 'barney', 'age': 36 }, - * { 'name': 'fred', 'age': 40 } - * ]; - * - * // using "_.pluck" callback shorthand - * _.map(characters, 'name'); - * // => ['barney', 'fred'] - */ - function map(collection, callback, thisArg) { - var index = -1, - length = collection ? collection.length : 0, - result = Array(typeof length == 'number' ? length : 0); - - callback = lodash.createCallback(callback, thisArg, 3); - if (isArray(collection)) { - while (++index < length) { - result[index] = callback(collection[index], index, collection); - } - } else { - baseEach(collection, function(value, key, collection) { - result[++index] = callback(value, key, collection); - }); - } - return result; - } - - /** - * Retrieves the maximum value of a collection. If the collection is empty or - * falsey `-Infinity` is returned. If a callback is provided it will be executed - * for each value in the collection to generate the criterion by which the value - * is ranked. The callback is bound to `thisArg` and invoked with three - * arguments; (value, index, collection). - * - * If a property name is provided for `callback` the created "_.pluck" style - * callback will return the property value of the given element. - * - * If an object is provided for `callback` the created "_.where" style callback - * will return `true` for elements that have the properties of the given object, - * else `false`. - * - * @static - * @memberOf _ - * @category Collections - * @param {Array|Object|string} collection The collection to iterate over. - * @param {Function|Object|string} [callback=identity] The function called - * per iteration. If a property name or object is provided it will be used - * to create a "_.pluck" or "_.where" style callback, respectively. - * @param {*} [thisArg] The `this` binding of `callback`. - * @returns {*} Returns the maximum value. - * @example - * - * _.max([4, 2, 8, 6]); - * // => 8 - * - * var characters = [ - * { 'name': 'barney', 'age': 36 }, - * { 'name': 'fred', 'age': 40 } - * ]; - * - * _.max(characters, function(chr) { return chr.age; }); - * // => { 'name': 'fred', 'age': 40 }; - * - * // using "_.pluck" callback shorthand - * _.max(characters, 'age'); - * // => { 'name': 'fred', 'age': 40 }; - */ - function max(collection, callback, thisArg) { - var computed = -Infinity, - result = computed; - - // allows working with functions like `_.map` without using - // their `index` argument as a callback - if (typeof callback != 'function' && thisArg && thisArg[callback] === collection) { - callback = null; - } - if (callback == null && isArray(collection)) { - var index = -1, - length = collection.length; - - while (++index < length) { - var value = collection[index]; - if (value > result) { - result = value; - } - } - } else { - callback = (callback == null && isString(collection)) - ? charAtCallback - : lodash.createCallback(callback, thisArg, 3); - - baseEach(collection, function(value, index, collection) { - var current = callback(value, index, collection); - if (current > computed) { - computed = current; - result = value; - } - }); - } - return result; - } - - /** - * Retrieves the minimum value of a collection. If the collection is empty or - * falsey `Infinity` is returned. If a callback is provided it will be executed - * for each value in the collection to generate the criterion by which the value - * is ranked. The callback is bound to `thisArg` and invoked with three - * arguments; (value, index, collection). - * - * If a property name is provided for `callback` the created "_.pluck" style - * callback will return the property value of the given element. - * - * If an object is provided for `callback` the created "_.where" style callback - * will return `true` for elements that have the properties of the given object, - * else `false`. - * - * @static - * @memberOf _ - * @category Collections - * @param {Array|Object|string} collection The collection to iterate over. - * @param {Function|Object|string} [callback=identity] The function called - * per iteration. If a property name or object is provided it will be used - * to create a "_.pluck" or "_.where" style callback, respectively. - * @param {*} [thisArg] The `this` binding of `callback`. - * @returns {*} Returns the minimum value. - * @example - * - * _.min([4, 2, 8, 6]); - * // => 2 - * - * var characters = [ - * { 'name': 'barney', 'age': 36 }, - * { 'name': 'fred', 'age': 40 } - * ]; - * - * _.min(characters, function(chr) { return chr.age; }); - * // => { 'name': 'barney', 'age': 36 }; - * - * // using "_.pluck" callback shorthand - * _.min(characters, 'age'); - * // => { 'name': 'barney', 'age': 36 }; - */ - function min(collection, callback, thisArg) { - var computed = Infinity, - result = computed; - - // allows working with functions like `_.map` without using - // their `index` argument as a callback - if (typeof callback != 'function' && thisArg && thisArg[callback] === collection) { - callback = null; - } - if (callback == null && isArray(collection)) { - var index = -1, - length = collection.length; - - while (++index < length) { - var value = collection[index]; - if (value < result) { - result = value; - } - } - } else { - callback = (callback == null && isString(collection)) - ? charAtCallback - : lodash.createCallback(callback, thisArg, 3); - - baseEach(collection, function(value, index, collection) { - var current = callback(value, index, collection); - if (current < computed) { - computed = current; - result = value; - } - }); - } - return result; - } - - /** - * Retrieves the value of a specified property from all elements in the collection. - * - * @static - * @memberOf _ - * @type Function - * @category Collections - * @param {Array|Object|string} collection The collection to iterate over. - * @param {string} property The name of the property to pluck. - * @returns {Array} Returns a new array of property values. - * @example - * - * var characters = [ - * { 'name': 'barney', 'age': 36 }, - * { 'name': 'fred', 'age': 40 } - * ]; - * - * _.pluck(characters, 'name'); - * // => ['barney', 'fred'] - */ - var pluck = map; - - /** - * Reduces a collection to a value which is the accumulated result of running - * each element in the collection through the callback, where each successive - * callback execution consumes the return value of the previous execution. If - * `accumulator` is not provided the first element of the collection will be - * used as the initial `accumulator` value. The callback is bound to `thisArg` - * and invoked with four arguments; (accumulator, value, index|key, collection). - * - * @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 {*} [accumulator] Initial value of the accumulator. - * @param {*} [thisArg] The `this` binding of `callback`. - * @returns {*} Returns the accumulated value. - * @example - * - * var sum = _.reduce([1, 2, 3], function(sum, num) { - * return sum + num; - * }); - * // => 6 - * - * var mapped = _.reduce({ 'a': 1, 'b': 2, 'c': 3 }, function(result, num, key) { - * result[key] = num * 3; - * return result; - * }, {}); - * // => { 'a': 3, 'b': 6, 'c': 9 } - */ - function reduce(collection, callback, accumulator, thisArg) { - var noaccum = arguments.length < 3; - callback = lodash.createCallback(callback, thisArg, 4); - - if (isArray(collection)) { - var index = -1, - length = collection.length; - - if (noaccum) { - accumulator = collection[++index]; - } - while (++index < length) { - accumulator = callback(accumulator, collection[index], index, collection); - } - } else { - baseEach(collection, function(value, index, collection) { - accumulator = noaccum - ? (noaccum = false, value) - : callback(accumulator, value, index, collection) - }); - } - return accumulator; - } - - /** - * This method is like `_.reduce` except that it iterates over elements - * of a `collection` from right to left. - * - * @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 {*} [accumulator] Initial value of the accumulator. - * @param {*} [thisArg] The `this` binding of `callback`. - * @returns {*} Returns the accumulated value. - * @example - * - * 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] - */ - function reduceRight(collection, callback, accumulator, thisArg) { - var noaccum = arguments.length < 3; - callback = lodash.createCallback(callback, thisArg, 4); - forEachRight(collection, function(value, index, collection) { - accumulator = noaccum - ? (noaccum = false, value) - : callback(accumulator, value, index, collection); - }); - return accumulator; - } - - /** - * The opposite of `_.filter` this method returns the elements of a - * collection that the callback does **not** return truey for. - * - * If a property name is provided for `callback` the created "_.pluck" style - * callback will return the property value of the given element. - * - * If an object is provided for `callback` the created "_.where" style callback - * will return `true` for elements that have the properties of the given object, - * else `false`. - * - * @static - * @memberOf _ - * @category Collections - * @param {Array|Object|string} collection The collection to iterate over. - * @param {Function|Object|string} [callback=identity] The function called - * per iteration. If a property name or object is provided it will be used - * to create a "_.pluck" or "_.where" style callback, respectively. - * @param {*} [thisArg] The `this` binding of `callback`. - * @returns {Array} Returns a new array of elements that failed the callback check. - * @example - * - * var odds = _.reject([1, 2, 3, 4, 5, 6], function(num) { return num % 2 == 0; }); - * // => [1, 3, 5] - * - * var characters = [ - * { 'name': 'barney', 'age': 36, 'blocked': false }, - * { 'name': 'fred', 'age': 40, 'blocked': true } - * ]; - * - * // using "_.pluck" callback shorthand - * _.reject(characters, 'blocked'); - * // => [{ 'name': 'barney', 'age': 36, 'blocked': false }] - * - * // using "_.where" callback shorthand - * _.reject(characters, { 'age': 36 }); - * // => [{ 'name': 'fred', 'age': 40, 'blocked': true }] - */ - function reject(collection, callback, thisArg) { - callback = lodash.createCallback(callback, thisArg, 3); - return filter(collection, function(value, index, collection) { - return !callback(value, index, collection); - }); - } - - /** - * Retrieves a random element or `n` random elements from a collection. - * - * @static - * @memberOf _ - * @category Collections - * @param {Array|Object|string} collection The collection to sample. - * @param {number} [n] The number of elements to sample. - * @param- {Object} [guard] Allows working with functions like `_.map` - * without using their `index` arguments as `n`. - * @returns {Array} Returns the random sample(s) of `collection`. - * @example - * - * _.sample([1, 2, 3, 4]); - * // => 2 - * - * _.sample([1, 2, 3, 4], 2); - * // => [3, 1] - */ - function sample(collection, n, guard) { - if (collection && typeof collection.length != 'number') { - collection = values(collection); - } else if (support.unindexedChars && isString(collection)) { - collection = collection.split(''); - } - if (n == null || guard) { - return collection ? collection[baseRandom(0, collection.length - 1)] : undefined; - } - var result = shuffle(collection); - result.length = nativeMin(nativeMax(0, n), result.length); - return result; - } - - /** - * Creates an array of shuffled values, using a version of the Fisher-Yates - * shuffle. See http://en.wikipedia.org/wiki/Fisher-Yates_shuffle. - * - * @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] - */ - function shuffle(collection) { - var index = -1, - length = collection ? collection.length : 0, - result = Array(typeof length == 'number' ? length : 0); - - forEach(collection, function(value) { - var rand = baseRandom(0, ++index); - result[index] = result[rand]; - result[rand] = value; - }); - return result; - } - - /** - * 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 - * - * _.size({ 'one': 1, 'two': 2, 'three': 3 }); - * // => 3 - * - * _.size('pebbles'); - * // => 7 - */ - function size(collection) { - var length = collection ? collection.length : 0; - return typeof length == 'number' ? length : keys(collection).length; - } - - /** - * Checks if the callback returns a truey value for **any** element of a - * collection. The function returns as soon as it finds a 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). - * - * If a property name is provided for `callback` the created "_.pluck" style - * callback will return the property value of the given element. - * - * If an object is provided for `callback` the created "_.where" style callback - * will return `true` for elements that have the properties of the given object, - * else `false`. - * - * @static - * @memberOf _ - * @alias any - * @category Collections - * @param {Array|Object|string} collection The collection to iterate over. - * @param {Function|Object|string} [callback=identity] The function called - * per iteration. If a property name or object is provided it will be used - * to create a "_.pluck" or "_.where" style callback, respectively. - * @param {*} [thisArg] The `this` binding of `callback`. - * @returns {boolean} Returns `true` if any element passed the callback check, - * else `false`. - * @example - * - * _.some([null, 0, 'yes', false], Boolean); - * // => true - * - * var characters = [ - * { 'name': 'barney', 'age': 36, 'blocked': false }, - * { 'name': 'fred', 'age': 40, 'blocked': true } - * ]; - * - * // using "_.pluck" callback shorthand - * _.some(characters, 'blocked'); - * // => true - * - * // using "_.where" callback shorthand - * _.some(characters, { 'age': 1 }); - * // => false - */ - function some(collection, callback, thisArg) { - var result; - callback = lodash.createCallback(callback, thisArg, 3); - - if (isArray(collection)) { - var index = -1, - length = collection.length; - - while (++index < length) { - if ((result = callback(collection[index], index, collection))) { - break; - } - } - } else { - baseEach(collection, function(value, index, collection) { - return !(result = callback(value, index, collection)); - }); - } - return !!result; - } - - /** - * Creates an array of elements, sorted in ascending order by the results of - * running each element in a collection through the callback. This method - * performs a stable sort, that is, it will preserve the original sort order - * of equal elements. The callback is bound to `thisArg` and invoked with - * three arguments; (value, index|key, collection). - * - * If a property name is provided for `callback` the created "_.pluck" style - * callback will return the property value of the given element. - * - * If an array of property names is provided for `callback` the collection - * will be sorted by each property value. - * - * If an object is provided for `callback` the created "_.where" style callback - * will return `true` for elements that have the properties of the given object, - * else `false`. - * - * @static - * @memberOf _ - * @category Collections - * @param {Array|Object|string} collection The collection to iterate over. - * @param {Array|Function|Object|string} [callback=identity] The function called - * per iteration. If a property name or object is provided it will be used - * to create a "_.pluck" or "_.where" style callback, respectively. - * @param {*} [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] - * - * _.sortBy([1, 2, 3], function(num) { return this.sin(num); }, Math); - * // => [3, 1, 2] - * - * var characters = [ - * { 'name': 'barney', 'age': 36 }, - * { 'name': 'fred', 'age': 40 }, - * { 'name': 'barney', 'age': 26 }, - * { 'name': 'fred', 'age': 30 } - * ]; - * - * // using "_.pluck" callback shorthand - * _.map(_.sortBy(characters, 'age'), _.values); - * // => [['barney', 26], ['fred', 30], ['barney', 36], ['fred', 40]] - * - * // sorting by multiple properties - * _.map(_.sortBy(characters, ['name', 'age']), _.values); - * // = > [['barney', 26], ['barney', 36], ['fred', 30], ['fred', 40]] - */ - function sortBy(collection, callback, thisArg) { - var index = -1, - isArr = isArray(callback), - length = collection ? collection.length : 0, - result = Array(typeof length == 'number' ? length : 0); - - if (!isArr) { - callback = lodash.createCallback(callback, thisArg, 3); - } - forEach(collection, function(value, key, collection) { - var object = result[++index] = getObject(); - if (isArr) { - object.criteria = map(callback, function(key) { return value[key]; }); - } else { - (object.criteria = getArray())[0] = callback(value, key, collection); - } - object.index = index; - object.value = value; - }); - - length = result.length; - result.sort(compareAscending); - while (length--) { - var object = result[length]; - result[length] = object.value; - if (!isArr) { - releaseArray(object.criteria); - } - releaseObject(object); - } - 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 - * - * (function() { return _.toArray(arguments).slice(1); })(1, 2, 3, 4); - * // => [2, 3, 4] - */ - function toArray(collection) { - if (collection && typeof collection.length == 'number') { - return (support.unindexedChars && isString(collection)) - ? collection.split('') - : slice(collection); - } - return values(collection); - } - - /** - * Performs a deep comparison of each element in a `collection` to the given - * `properties` object, returning an array of all elements that have equivalent - * property values. - * - * @static - * @memberOf _ - * @type Function - * @category Collections - * @param {Array|Object|string} collection The collection to iterate over. - * @param {Object} props The object of property values to filter by. - * @returns {Array} Returns a new array of elements that have the given properties. - * @example - * - * var characters = [ - * { 'name': 'barney', 'age': 36, 'pets': ['hoppy'] }, - * { 'name': 'fred', 'age': 40, 'pets': ['baby puss', 'dino'] } - * ]; - * - * _.where(characters, { 'age': 36 }); - * // => [{ 'name': 'barney', 'age': 36, 'pets': ['hoppy'] }] - * - * _.where(characters, { 'pets': ['dino'] }); - * // => [{ 'name': 'fred', 'age': 40, 'pets': ['baby puss', 'dino'] }] - */ - var where = filter; - - /*--------------------------------------------------------------------------*/ - - /** - * Creates an array with all falsey values removed. The values `false`, `null`, - * `0`, `""`, `undefined`, and `NaN` are all falsey. - * - * @static - * @memberOf _ - * @category Arrays - * @param {Array} array The array to compact. - * @returns {Array} Returns a new array of filtered values. - * @example - * - * _.compact([0, 1, false, 2, '', 3]); - * // => [1, 2, 3] - */ - function compact(array) { - var index = -1, - length = array ? array.length : 0, - result = []; - - while (++index < length) { - var value = array[index]; - if (value) { - result.push(value); - } - } - return result; - } - - /** - * Creates an array excluding all values of the provided arrays using strict - * equality for comparisons, i.e. `===`. - * - * @static - * @memberOf _ - * @category Arrays - * @param {Array} array The array to process. - * @param {...Array} [values] The arrays of values to exclude. - * @returns {Array} Returns a new array of filtered values. - * @example - * - * _.difference([1, 2, 3, 4, 5], [5, 2, 10]); - * // => [1, 3, 4] - */ - function difference(array) { - return baseDifference(array, baseFlatten(arguments, true, true, 1)); - } - - /** - * This method is like `_.find` except that it returns the index of the first - * element that passes the callback check, instead of the element itself. - * - * If a property name is provided for `callback` the created "_.pluck" style - * callback will return the property value of the given element. - * - * If an object is provided for `callback` the created "_.where" style callback - * will return `true` for elements that have the properties of the given object, - * else `false`. - * - * @static - * @memberOf _ - * @category Arrays - * @param {Array} array The array to search. - * @param {Function|Object|string} [callback=identity] The function called - * per iteration. If a property name or object is provided it will be used - * to create a "_.pluck" or "_.where" style callback, respectively. - * @param {*} [thisArg] The `this` binding of `callback`. - * @returns {number} Returns the index of the found element, else `-1`. - * @example - * - * var characters = [ - * { 'name': 'barney', 'age': 36, 'blocked': false }, - * { 'name': 'fred', 'age': 40, 'blocked': true }, - * { 'name': 'pebbles', 'age': 1, 'blocked': false } - * ]; - * - * _.findIndex(characters, function(chr) { - * return chr.age < 20; - * }); - * // => 2 - * - * // using "_.where" callback shorthand - * _.findIndex(characters, { 'age': 36 }); - * // => 0 - * - * // using "_.pluck" callback shorthand - * _.findIndex(characters, 'blocked'); - * // => 1 - */ - function findIndex(array, callback, thisArg) { - var index = -1, - length = array ? array.length : 0; - - callback = lodash.createCallback(callback, thisArg, 3); - while (++index < length) { - if (callback(array[index], index, array)) { - return index; - } - } - return -1; - } - - /** - * This method is like `_.findIndex` except that it iterates over elements - * of a `collection` from right to left. - * - * If a property name is provided for `callback` the created "_.pluck" style - * callback will return the property value of the given element. - * - * If an object is provided for `callback` the created "_.where" style callback - * will return `true` for elements that have the properties of the given object, - * else `false`. - * - * @static - * @memberOf _ - * @category Arrays - * @param {Array} array The array to search. - * @param {Function|Object|string} [callback=identity] The function called - * per iteration. If a property name or object is provided it will be used - * to create a "_.pluck" or "_.where" style callback, respectively. - * @param {*} [thisArg] The `this` binding of `callback`. - * @returns {number} Returns the index of the found element, else `-1`. - * @example - * - * var characters = [ - * { 'name': 'barney', 'age': 36, 'blocked': true }, - * { 'name': 'fred', 'age': 40, 'blocked': false }, - * { 'name': 'pebbles', 'age': 1, 'blocked': true } - * ]; - * - * _.findLastIndex(characters, function(chr) { - * return chr.age > 30; - * }); - * // => 1 - * - * // using "_.where" callback shorthand - * _.findLastIndex(characters, { 'age': 36 }); - * // => 0 - * - * // using "_.pluck" callback shorthand - * _.findLastIndex(characters, 'blocked'); - * // => 2 - */ - function findLastIndex(array, callback, thisArg) { - var length = array ? array.length : 0; - callback = lodash.createCallback(callback, thisArg, 3); - while (length--) { - if (callback(array[length], length, array)) { - return length; - } - } - return -1; - } - - /** - * Gets the first element or first `n` elements of an array. If a callback - * is provided elements at the beginning of the array are returned as long - * as the callback returns truey. The callback is bound to `thisArg` and - * invoked with three arguments; (value, index, array). - * - * If a property name is provided for `callback` the created "_.pluck" style - * callback will return the property value of the given element. - * - * If an object is provided for `callback` the created "_.where" style callback - * will return `true` for elements that have the properties of the given object, - * else `false`. - * - * @static - * @memberOf _ - * @alias head, take - * @category Arrays - * @param {Array} array The array to query. - * @param {Function|Object|number|string} [callback] The function called - * per element or the number of elements to return. If a property name or - * object is provided it will be used to create a "_.pluck" or "_.where" - * style callback, respectively. - * @param {*} [thisArg] The `this` binding of `callback`. - * @returns {*} Returns the first element(s) of `array`. - * @example - * - * _.first([1, 2, 3]); - * // => 1 - * - * _.first([1, 2, 3], 2); - * // => [1, 2] - * - * _.first([1, 2, 3], function(num) { - * return num < 3; - * }); - * // => [1, 2] - * - * var characters = [ - * { 'name': 'barney', 'blocked': true, 'employer': 'slate' }, - * { 'name': 'fred', 'blocked': false, 'employer': 'slate' }, - * { 'name': 'pebbles', 'blocked': true, 'employer': 'na' } - * ]; - * - * // using "_.pluck" callback shorthand - * _.first(characters, 'blocked'); - * // => [{ 'name': 'barney', 'blocked': true, 'employer': 'slate' }] - * - * // using "_.where" callback shorthand - * _.pluck(_.first(characters, { 'employer': 'slate' }), 'name'); - * // => ['barney', 'fred'] - */ - function first(array, callback, thisArg) { - var n = 0, - length = array ? array.length : 0; - - if (typeof callback != 'number' && callback != null) { - var index = -1; - callback = lodash.createCallback(callback, thisArg, 3); - while (++index < length && callback(array[index], index, array)) { - n++; - } - } else { - n = callback; - if (n == null || thisArg) { - return array ? array[0] : undefined; - } - } - return slice(array, 0, nativeMin(nativeMax(0, n), length)); - } - - /** - * Flattens a nested array (the nesting can be to any depth). If `isShallow` - * is truey, the array will only be flattened a single level. If a callback - * is provided each element of the array is passed through the callback before - * flattening. The callback is bound to `thisArg` and invoked with three - * arguments; (value, index, array). - * - * If a property name is provided for `callback` the created "_.pluck" style - * callback will return the property value of the given element. - * - * If an object is provided for `callback` the created "_.where" style callback - * will return `true` for elements that have the properties of the given object, - * else `false`. - * - * @static - * @memberOf _ - * @category Arrays - * @param {Array} array The array to flatten. - * @param {boolean} [isShallow=false] A flag to restrict flattening to a single level. - * @param {Function|Object|string} [callback=identity] The function called - * per iteration. If a property name or object is provided it will be used - * to create a "_.pluck" or "_.where" style callback, respectively. - * @param {*} [thisArg] The `this` binding of `callback`. - * @returns {Array} Returns a new flattened array. - * @example - * - * _.flatten([1, [2], [3, [[4]]]]); - * // => [1, 2, 3, 4]; - * - * _.flatten([1, [2], [3, [[4]]]], true); - * // => [1, 2, 3, [[4]]]; - * - * var characters = [ - * { 'name': 'barney', 'age': 30, 'pets': ['hoppy'] }, - * { 'name': 'fred', 'age': 40, 'pets': ['baby puss', 'dino'] } - * ]; - * - * // using "_.pluck" callback shorthand - * _.flatten(characters, 'pets'); - * // => ['hoppy', 'baby puss', 'dino'] - */ - function flatten(array, isShallow, callback, thisArg) { - // juggle arguments - if (typeof isShallow != 'boolean' && isShallow != null) { - thisArg = callback; - callback = (typeof isShallow != 'function' && thisArg && thisArg[isShallow] === array) ? null : isShallow; - isShallow = false; - } - if (callback != null) { - array = map(array, callback, thisArg); - } - return baseFlatten(array, isShallow); - } - - /** - * 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 - * providing `true` for `fromIndex` will run a faster binary search. - * - * @static - * @memberOf _ - * @category Arrays - * @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 or `-1`. - * @example - * - * _.indexOf([1, 2, 3, 1, 2, 3], 2); - * // => 1 - * - * _.indexOf([1, 2, 3, 1, 2, 3], 2, 3); - * // => 4 - * - * _.indexOf([1, 1, 2, 2, 3, 3], 2, true); - * // => 2 - */ - function indexOf(array, value, fromIndex) { - if (typeof fromIndex == 'number') { - var length = array ? array.length : 0; - fromIndex = (fromIndex < 0 ? nativeMax(0, length + fromIndex) : fromIndex || 0); - } else if (fromIndex) { - var index = sortedIndex(array, value); - return array[index] === value ? index : -1; - } - return baseIndexOf(array, value, fromIndex); - } - - /** - * Gets all but the last element or last `n` elements of an array. If a - * callback is provided elements at the end of the array are excluded from - * the result as long as the callback returns truey. The callback is bound - * to `thisArg` and invoked with three arguments; (value, index, array). - * - * If a property name is provided for `callback` the created "_.pluck" style - * callback will return the property value of the given element. - * - * If an object is provided for `callback` the created "_.where" style callback - * will return `true` for elements that have the properties of the given object, - * else `false`. - * - * @static - * @memberOf _ - * @category Arrays - * @param {Array} array The array to query. - * @param {Function|Object|number|string} [callback=1] The function called - * per element or the number of elements to exclude. If a property name or - * object is provided it will be used to create a "_.pluck" or "_.where" - * style callback, respectively. - * @param {*} [thisArg] The `this` binding of `callback`. - * @returns {Array} Returns a slice of `array`. - * @example - * - * _.initial([1, 2, 3]); - * // => [1, 2] - * - * _.initial([1, 2, 3], 2); - * // => [1] - * - * _.initial([1, 2, 3], function(num) { - * return num > 1; - * }); - * // => [1] - * - * var characters = [ - * { 'name': 'barney', 'blocked': false, 'employer': 'slate' }, - * { 'name': 'fred', 'blocked': true, 'employer': 'slate' }, - * { 'name': 'pebbles', 'blocked': true, 'employer': 'na' } - * ]; - * - * // using "_.pluck" callback shorthand - * _.initial(characters, 'blocked'); - * // => [{ 'name': 'barney', 'blocked': false, 'employer': 'slate' }] - * - * // using "_.where" callback shorthand - * _.pluck(_.initial(characters, { 'employer': 'na' }), 'name'); - * // => ['barney', 'fred'] - */ - function initial(array, callback, thisArg) { - var n = 0, - length = array ? array.length : 0; - - if (typeof callback != 'number' && callback != null) { - var index = length; - callback = lodash.createCallback(callback, thisArg, 3); - while (index-- && callback(array[index], index, array)) { - n++; - } - } else { - n = (callback == null || thisArg) ? 1 : callback || n; - } - return slice(array, 0, nativeMin(nativeMax(0, length - n), length)); - } - - /** - * Creates an array of unique values present in all provided arrays using - * strict equality for comparisons, i.e. `===`. - * - * @static - * @memberOf _ - * @category Arrays - * @param {...Array} [array] The arrays to inspect. - * @returns {Array} Returns an array of shared values. - * @example - * - * _.intersection([1, 2, 3], [5, 2, 1, 4], [2, 1]); - * // => [1, 2] - */ - function intersection() { - var args = [], - argsIndex = -1, - argsLength = arguments.length, - caches = getArray(), - indexOf = getIndexOf(), - trustIndexOf = indexOf === baseIndexOf, - seen = getArray(); - - while (++argsIndex < argsLength) { - var value = arguments[argsIndex]; - if (isArray(value) || isArguments(value)) { - args.push(value); - caches.push(trustIndexOf && value.length >= largeArraySize && - createCache(argsIndex ? args[argsIndex] : seen)); - } - } - var array = args[0], - index = -1, - length = array ? array.length : 0, - result = []; - - outer: - while (++index < length) { - var cache = caches[0]; - value = array[index]; - - if ((cache ? cacheIndexOf(cache, value) : indexOf(seen, value)) < 0) { - argsIndex = argsLength; - (cache || seen).push(value); - while (--argsIndex) { - cache = caches[argsIndex]; - if ((cache ? cacheIndexOf(cache, value) : indexOf(args[argsIndex], value)) < 0) { - continue outer; - } - } - result.push(value); - } - } - while (argsLength--) { - cache = caches[argsLength]; - if (cache) { - releaseObject(cache); - } - } - releaseArray(caches); - releaseArray(seen); - return result; - } - - /** - * Gets the last element or last `n` elements of an array. If a callback is - * provided elements at the end of the array are returned as long as the - * callback returns truey. The callback is bound to `thisArg` and invoked - * with three arguments; (value, index, array). - * - * If a property name is provided for `callback` the created "_.pluck" style - * callback will return the property value of the given element. - * - * If an object is provided for `callback` the created "_.where" style callback - * will return `true` for elements that have the properties of the given object, - * else `false`. - * - * @static - * @memberOf _ - * @category Arrays - * @param {Array} array The array to query. - * @param {Function|Object|number|string} [callback] The function called - * per element or the number of elements to return. If a property name or - * object is provided it will be used to create a "_.pluck" or "_.where" - * style callback, respectively. - * @param {*} [thisArg] The `this` binding of `callback`. - * @returns {*} Returns the last element(s) of `array`. - * @example - * - * _.last([1, 2, 3]); - * // => 3 - * - * _.last([1, 2, 3], 2); - * // => [2, 3] - * - * _.last([1, 2, 3], function(num) { - * return num > 1; - * }); - * // => [2, 3] - * - * var characters = [ - * { 'name': 'barney', 'blocked': false, 'employer': 'slate' }, - * { 'name': 'fred', 'blocked': true, 'employer': 'slate' }, - * { 'name': 'pebbles', 'blocked': true, 'employer': 'na' } - * ]; - * - * // using "_.pluck" callback shorthand - * _.pluck(_.last(characters, 'blocked'), 'name'); - * // => ['fred', 'pebbles'] - * - * // using "_.where" callback shorthand - * _.last(characters, { 'employer': 'na' }); - * // => [{ 'name': 'pebbles', 'blocked': true, 'employer': 'na' }] - */ - function last(array, callback, thisArg) { - var n = 0, - length = array ? array.length : 0; - - if (typeof callback != 'number' && callback != null) { - var index = length; - callback = lodash.createCallback(callback, thisArg, 3); - while (index-- && callback(array[index], index, array)) { - n++; - } - } else { - n = callback; - if (n == null || thisArg) { - return array ? array[length - 1] : undefined; - } - } - return slice(array, nativeMax(0, length - n)); - } - - /** - * 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. - * - * If a property name is provided for `callback` the created "_.pluck" style - * callback will return the property value of the given element. - * - * If an object is provided for `callback` the created "_.where" style callback - * will return `true` for elements that have the properties of the given object, - * else `false`. - * - * @static - * @memberOf _ - * @category Arrays - * @param {Array} array The array to search. - * @param {*} value The value to search for. - * @param {number} [fromIndex=array.length-1] The index to search from. - * @returns {number} Returns the index of the matched value or `-1`. - * @example - * - * _.lastIndexOf([1, 2, 3, 1, 2, 3], 2); - * // => 4 - * - * _.lastIndexOf([1, 2, 3, 1, 2, 3], 2, 3); - * // => 1 - */ - 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; - } - while (index--) { - if (array[index] === value) { - return index; - } - } - return -1; - } - - /** - * Removes all provided values from the given array using strict equality for - * comparisons, i.e. `===`. - * - * @static - * @memberOf _ - * @category Arrays - * @param {Array} array The array to modify. - * @param {...*} [value] The values to remove. - * @returns {Array} Returns `array`. - * @example - * - * var array = [1, 2, 3, 1, 2, 3]; - * _.pull(array, 2, 3); - * console.log(array); - * // => [1, 1] - */ - function pull(array) { - var args = arguments, - argsIndex = 0, - argsLength = args.length, - length = array ? array.length : 0; - - while (++argsIndex < argsLength) { - var index = -1, - value = args[argsIndex]; - while (++index < length) { - if (array[index] === value) { - splice.call(array, index--, 1); - length--; - } - } - } - return array; - } - - /** - * Creates an array of numbers (positive and/or negative) progressing from - * `start` up to but not including `end`. If `start` is less than `stop` a - * zero-length range is created unless a negative `step` is specified. - * - * @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 decrement by. - * @returns {Array} Returns a new range array. - * @example - * - * _.range(4); - * // => [0, 1, 2, 3] - * - * _.range(1, 5); - * // => [1, 2, 3, 4] - * - * _.range(0, 20, 5); - * // => [0, 5, 10, 15] - * - * _.range(0, -4, -1); - * // => [0, -1, -2, -3] - * - * _.range(1, 4, 0); - * // => [1, 1, 1] - * - * _.range(0); - * // => [] - */ - function range(start, end, step) { - start = +start || 0; - step = typeof step == 'number' ? step : (+step || 1); - - if (end == null) { - end = start; - start = 0; - } - // use `Array(length)` so engines like Chakra and V8 avoid slower modes - // http://youtu.be/XAqIpGU8ZZk#t=17m25s - var index = -1, - length = nativeMax(0, ceil((end - start) / (step || 1))), - result = Array(length); - - while (++index < length) { - result[index] = start; - start += step; - } - return result; - } - - /** - * Removes all elements from an array that the callback returns truey for - * and returns an array of removed elements. The callback is bound to `thisArg` - * and invoked with three arguments; (value, index, array). - * - * If a property name is provided for `callback` the created "_.pluck" style - * callback will return the property value of the given element. - * - * If an object is provided for `callback` the created "_.where" style callback - * will return `true` for elements that have the properties of the given object, - * else `false`. - * - * @static - * @memberOf _ - * @category Arrays - * @param {Array} array The array to modify. - * @param {Function|Object|string} [callback=identity] The function called - * per iteration. If a property name or object is provided it will be used - * to create a "_.pluck" or "_.where" style callback, respectively. - * @param {*} [thisArg] The `this` binding of `callback`. - * @returns {Array} Returns a new array of removed elements. - * @example - * - * var array = [1, 2, 3, 4, 5, 6]; - * var evens = _.remove(array, function(num) { return num % 2 == 0; }); - * - * console.log(array); - * // => [1, 3, 5] - * - * console.log(evens); - * // => [2, 4, 6] - */ - function remove(array, callback, thisArg) { - var index = -1, - length = array ? array.length : 0, - result = []; - - callback = lodash.createCallback(callback, thisArg, 3); - while (++index < length) { - var value = array[index]; - if (callback(value, index, array)) { - result.push(value); - splice.call(array, index--, 1); - length--; - } - } - return result; - } - - /** - * The opposite of `_.initial` this method gets all but the first element or - * first `n` elements of an array. If a callback function is provided elements - * at the beginning of the array are excluded from the result as long as the - * callback returns truey. The callback is bound to `thisArg` and invoked - * with three arguments; (value, index, array). - * - * If a property name is provided for `callback` the created "_.pluck" style - * callback will return the property value of the given element. - * - * If an object is provided for `callback` the created "_.where" style callback - * will return `true` for elements that have the properties of the given object, - * else `false`. - * - * @static - * @memberOf _ - * @alias drop, tail - * @category Arrays - * @param {Array} array The array to query. - * @param {Function|Object|number|string} [callback=1] The function called - * per element or the number of elements to exclude. If a property name or - * object is provided it will be used to create a "_.pluck" or "_.where" - * style callback, respectively. - * @param {*} [thisArg] The `this` binding of `callback`. - * @returns {Array} Returns a slice of `array`. - * @example - * - * _.rest([1, 2, 3]); - * // => [2, 3] - * - * _.rest([1, 2, 3], 2); - * // => [3] - * - * _.rest([1, 2, 3], function(num) { - * return num < 3; - * }); - * // => [3] - * - * var characters = [ - * { 'name': 'barney', 'blocked': true, 'employer': 'slate' }, - * { 'name': 'fred', 'blocked': false, 'employer': 'slate' }, - * { 'name': 'pebbles', 'blocked': true, 'employer': 'na' } - * ]; - * - * // using "_.pluck" callback shorthand - * _.pluck(_.rest(characters, 'blocked'), 'name'); - * // => ['fred', 'pebbles'] - * - * // using "_.where" callback shorthand - * _.rest(characters, { 'employer': 'slate' }); - * // => [{ 'name': 'pebbles', 'blocked': true, 'employer': 'na' }] - */ - function rest(array, callback, thisArg) { - if (typeof callback != 'number' && callback != null) { - var n = 0, - index = -1, - length = array ? array.length : 0; - - callback = lodash.createCallback(callback, thisArg, 3); - while (++index < length && callback(array[index], index, array)) { - n++; - } - } else { - n = (callback == null || thisArg) ? 1 : nativeMax(0, callback); - } - return slice(array, n); - } - - /** - * Uses a binary search to determine the smallest index at which a value - * should be inserted into a given sorted array in order to maintain the sort - * order of the array. If a callback is provided it will be executed for - * `value` and each element of `array` to compute their sort ranking. The - * callback is bound to `thisArg` and invoked with one argument; (value). - * - * If a property name is provided for `callback` the created "_.pluck" style - * callback will return the property value of the given element. - * - * If an object is provided for `callback` the created "_.where" style callback - * will return `true` for elements that have the properties of the given object, - * else `false`. - * - * @static - * @memberOf _ - * @category Arrays - * @param {Array} array The array to inspect. - * @param {*} value The value to evaluate. - * @param {Function|Object|string} [callback=identity] The function called - * per iteration. If a property name or object is provided it will be used - * to create a "_.pluck" or "_.where" style callback, respectively. - * @param {*} [thisArg] The `this` binding of `callback`. - * @returns {number} Returns the index at which `value` should be inserted - * into `array`. - * @example - * - * _.sortedIndex([20, 30, 50], 40); - * // => 2 - * - * // using "_.pluck" callback shorthand - * _.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 - * - * _.sortedIndex(['twenty', 'thirty', 'fifty'], 'fourty', function(word) { - * return this.wordToNumber[word]; - * }, dict); - * // => 2 - */ - function sortedIndex(array, value, callback, thisArg) { - var low = 0, - high = array ? array.length : low; - - // explicitly reference `identity` for better inlining in Firefox - callback = callback ? lodash.createCallback(callback, thisArg, 1) : identity; - value = callback(value); - - while (low < high) { - var mid = (low + high) >>> 1; - (callback(array[mid]) < value) - ? low = mid + 1 - : high = mid; - } - return low; - } - - /** - * Creates an array of unique values, in order, of the provided arrays using - * strict equality for comparisons, i.e. `===`. - * - * @static - * @memberOf _ - * @category Arrays - * @param {...Array} [array] The arrays to inspect. - * @returns {Array} Returns an array of combined values. - * @example - * - * _.union([1, 2, 3], [5, 2, 1, 4], [2, 1]); - * // => [1, 2, 3, 5, 4] - */ - function union() { - return baseUniq(baseFlatten(arguments, true, true)); - } - - /** - * Creates a duplicate-value-free version of an array using strict equality - * for comparisons, i.e. `===`. If the array is sorted, providing - * `true` for `isSorted` will use a faster algorithm. If a callback is provided - * each element of `array` is passed through the callback before uniqueness - * is computed. The callback is bound to `thisArg` and invoked with three - * arguments; (value, index, array). - * - * If a property name is provided for `callback` the created "_.pluck" style - * callback will return the property value of the given element. - * - * If an object is provided for `callback` the created "_.where" style callback - * will return `true` for elements that have the properties of the given object, - * else `false`. - * - * @static - * @memberOf _ - * @alias unique - * @category Arrays - * @param {Array} array The array to process. - * @param {boolean} [isSorted=false] A flag to indicate that `array` is sorted. - * @param {Function|Object|string} [callback=identity] The function called - * per iteration. If a property name or object is provided it will be used - * to create a "_.pluck" or "_.where" style callback, respectively. - * @param {*} [thisArg] The `this` binding of `callback`. - * @returns {Array} Returns a duplicate-value-free array. - * @example - * - * _.uniq([1, 2, 1, 3, 1]); - * // => [1, 2, 3] - * - * _.uniq([1, 1, 2, 2, 3], true); - * // => [1, 2, 3] - * - * _.uniq(['A', 'b', 'C', 'a', 'B', 'c'], function(letter) { return letter.toLowerCase(); }); - * // => ['A', 'b', 'C'] - * - * _.uniq([1, 2.5, 3, 1.5, 2, 3.5], function(num) { return this.floor(num); }, Math); - * // => [1, 2.5, 3] - * - * // using "_.pluck" callback shorthand - * _.uniq([{ 'x': 1 }, { 'x': 2 }, { 'x': 1 }], 'x'); - * // => [{ 'x': 1 }, { 'x': 2 }] - */ - function uniq(array, isSorted, callback, thisArg) { - // juggle arguments - if (typeof isSorted != 'boolean' && isSorted != null) { - thisArg = callback; - callback = (typeof isSorted != 'function' && thisArg && thisArg[isSorted] === array) ? null : isSorted; - isSorted = false; - } - if (callback != null) { - callback = lodash.createCallback(callback, thisArg, 3); - } - return baseUniq(array, isSorted, callback); - } - - /** - * Creates an array excluding all provided values using strict equality for - * comparisons, i.e. `===`. - * - * @static - * @memberOf _ - * @category Arrays - * @param {Array} array The array to filter. - * @param {...*} [value] The values to exclude. - * @returns {Array} Returns a new array of filtered values. - * @example - * - * _.without([1, 2, 1, 0, 3, 1, 4], 0, 1); - * // => [2, 3, 4] - */ - function without(array) { - return baseDifference(array, slice(arguments, 1)); - } - - /** - * Creates an array that is the symmetric difference of the provided arrays. - * See http://en.wikipedia.org/wiki/Symmetric_difference. - * - * @static - * @memberOf _ - * @category Arrays - * @param {...Array} [array] The arrays to inspect. - * @returns {Array} Returns an array of values. - * @example - * - * _.xor([1, 2, 3], [5, 2, 1, 4]); - * // => [3, 5, 4] - * - * _.xor([1, 2, 5], [2, 3, 5], [3, 4, 5]); - * // => [1, 4, 5] - */ - function xor() { - var index = -1, - length = arguments.length; - - while (++index < length) { - var array = arguments[index]; - if (isArray(array) || isArguments(array)) { - var result = result - ? baseUniq(baseDifference(result, array).concat(baseDifference(array, result))) - : array; - } - } - return result || []; - } - - /** - * Creates an array of grouped elements, the first of which contains the first - * elements of the given arrays, the second of which contains the second - * elements of the given arrays, and so on. - * - * @static - * @memberOf _ - * @alias unzip - * @category Arrays - * @param {...Array} [array] Arrays to process. - * @returns {Array} Returns a new array of grouped elements. - * @example - * - * _.zip(['fred', 'barney'], [30, 40], [true, false]); - * // => [['fred', 30, true], ['barney', 40, false]] - */ - function zip() { - var array = arguments.length > 1 ? arguments : arguments[0], - index = -1, - length = array ? max(pluck(array, 'length')) : 0, - result = Array(length < 0 ? 0 : length); - - while (++index < length) { - result[index] = pluck(array, index); - } - return result; - } - - /** - * Creates an object composed from arrays of `keys` and `values`. Provide - * 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 _ - * @alias object - * @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 - * - * _.zipObject(['fred', 'barney'], [30, 40]); - * // => { 'fred': 30, 'barney': 40 } - */ - function zipObject(keys, values) { - var index = -1, - length = keys ? keys.length : 0, - result = {}; - - if (!values && length && !isArray(keys[0])) { - values = []; - } - while (++index < length) { - var key = keys[index]; - if (values) { - result[key] = values[index]; - } else if (key) { - result[key[0]] = key[1]; - } - } - return result; - } - - /*--------------------------------------------------------------------------*/ - - /** - * Creates a function that executes `func`, with the `this` binding and - * arguments of the created function, only after being called `n` times. - * - * @static - * @memberOf _ - * @category Functions - * @param {number} n The number of times the function must be called before - * `func` is executed. - * @param {Function} func The function to restrict. - * @returns {Function} Returns the new restricted function. - * @example - * - * var saves = ['profile', 'settings']; - * - * var done = _.after(saves.length, function() { - * console.log('Done saving!'); - * }); - * - * _.forEach(saves, function(type) { - * asyncSave({ 'type': type, 'complete': done }); - * }); - * // => logs 'Done saving!', after all saves have completed - */ - function after(n, func) { - if (!isFunction(func)) { - throw new TypeError; - } - return function() { - if (--n < 1) { - return func.apply(this, arguments); - } - }; - } - - /** - * Creates a function that, when called, invokes `func` with the `this` - * binding of `thisArg` and prepends any additional `bind` arguments to those - * provided to the bound function. - * - * @static - * @memberOf _ - * @category Functions - * @param {Function} func The function to bind. - * @param {*} [thisArg] The `this` binding of `func`. - * @param {...*} [arg] Arguments to be partially applied. - * @returns {Function} Returns the new bound function. - * @example - * - * var func = function(greeting) { - * return greeting + ' ' + this.name; - * }; - * - * func = _.bind(func, { 'name': 'fred' }, 'hi'); - * func(); - * // => 'hi fred' - */ - function bind(func, thisArg) { - return arguments.length > 2 - ? createWrapper(func, 17, slice(arguments, 2), null, thisArg) - : createWrapper(func, 1, null, null, thisArg); - } - - /** - * Binds methods of an object to the object itself, overwriting the existing - * method. Method names may be specified as individual arguments or as arrays - * of method names. If no method names are provided all the function properties - * of `object` will be bound. - * - * @static - * @memberOf _ - * @category Functions - * @param {Object} object The object to bind and assign the bound methods to. - * @param {...string} [methodName] The object method names to - * bind, specified as individual method names or arrays of method names. - * @returns {Object} Returns `object`. - * @example - * - * var view = { - * 'label': 'docs', - * 'onClick': function() { console.log('clicked ' + this.label); } - * }; - * - * _.bindAll(view); - * jQuery('#docs').on('click', view.onClick); - * // => logs 'clicked docs', when the button is clicked - */ - function bindAll(object) { - var funcs = arguments.length > 1 ? baseFlatten(arguments, true, false, 1) : functions(object), - index = -1, - length = funcs.length; - - while (++index < length) { - var key = funcs[index]; - object[key] = createWrapper(object[key], 1, null, null, object); - } - return object; - } - - /** - * Creates a function that, when called, invokes the method at `object[key]` - * and prepends any additional `bindKey` arguments to those provided 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. - * - * @static - * @memberOf _ - * @category Functions - * @param {Object} object The object the method belongs to. - * @param {string} key The key of the method. - * @param {...*} [arg] Arguments to be partially applied. - * @returns {Function} Returns the new bound function. - * @example - * - * var object = { - * 'name': 'fred', - * 'greet': function(greeting) { - * return greeting + ' ' + this.name; - * } - * }; - * - * var func = _.bindKey(object, 'greet', 'hi'); - * func(); - * // => 'hi fred' - * - * object.greet = function(greeting) { - * return greeting + 'ya ' + this.name + '!'; - * }; - * - * func(); - * // => 'hiya fred!' - */ - function bindKey(object, key) { - return arguments.length > 2 - ? createWrapper(key, 19, slice(arguments, 2), null, object) - : createWrapper(key, 3, null, null, object); - } - - /** - * Creates a function that is the composition of the provided functions, - * where each function consumes the return value of the function that follows. - * For example, composing the functions `f()`, `g()`, and `h()` produces `f(g(h()))`. - * Each function is executed with the `this` binding of the composed function. - * - * @static - * @memberOf _ - * @category Functions - * @param {...Function} [func] Functions to compose. - * @returns {Function} Returns the new composed function. - * @example - * - * var realNameMap = { - * 'pebbles': 'penelope' - * }; - * - * var format = function(name) { - * name = realNameMap[name.toLowerCase()] || name; - * return name.charAt(0).toUpperCase() + name.slice(1).toLowerCase(); - * }; - * - * var greet = function(formatted) { - * return 'Hiya ' + formatted + '!'; - * }; - * - * var welcome = _.compose(greet, format); - * welcome('pebbles'); - * // => 'Hiya Penelope!' - */ - function compose() { - var funcs = arguments, - length = funcs.length; - - while (length--) { - if (!isFunction(funcs[length])) { - throw new TypeError; - } - } - return function() { - var args = arguments, - length = funcs.length; - - while (length--) { - args = [funcs[length].apply(this, args)]; - } - return args[0]; - }; - } - - /** - * Creates a function which accepts one or more arguments of `func` that when - * invoked either executes `func` returning its result, if all `func` arguments - * have been provided, or returns a function that accepts one or more of the - * remaining `func` arguments, and so on. The arity of `func` can be specified - * if `func.length` is not sufficient. - * - * @static - * @memberOf _ - * @category Functions - * @param {Function} func The function to curry. - * @param {number} [arity=func.length] The arity of `func`. - * @returns {Function} Returns the new curried function. - * @example - * - * var curried = _.curry(function(a, b, c) { - * console.log(a + b + c); - * }); - * - * curried(1)(2)(3); - * // => 6 - * - * curried(1, 2)(3); - * // => 6 - * - * curried(1, 2, 3); - * // => 6 - */ - function curry(func, arity) { - arity = typeof arity == 'number' ? arity : (+arity || func.length); - return createWrapper(func, 4, null, null, null, arity); - } - - /** - * Creates a function that will delay the execution of `func` until after - * `wait` milliseconds have elapsed since the last time it was invoked. - * Provide an options object to indicate that `func` should be invoked on - * the leading and/or trailing edge of the `wait` timeout. Subsequent calls - * to the debounced function will return the result of the last `func` call. - * - * Note: If `leading` and `trailing` options are `true` `func` will be called - * on the trailing edge of the timeout only if the the debounced function is - * invoked more than once during the `wait` timeout. - * - * @static - * @memberOf _ - * @category Functions - * @param {Function} func The function to debounce. - * @param {number} wait The number of milliseconds to delay. - * @param {Object} [options] The options object. - * @param {boolean} [options.leading=false] Specify execution on the leading edge of the timeout. - * @param {number} [options.maxWait] The maximum time `func` is allowed to be delayed before it's called. - * @param {boolean} [options.trailing=true] Specify execution on the trailing edge of the timeout. - * @returns {Function} Returns the new debounced function. - * @example - * - * // avoid costly calculations while the window size is in flux - * var lazyLayout = _.debounce(calculateLayout, 150); - * jQuery(window).on('resize', lazyLayout); - * - * // execute `sendMail` when the click event is fired, debouncing subsequent calls - * jQuery('#postbox').on('click', _.debounce(sendMail, 300, { - * 'leading': true, - * 'trailing': false - * }); - * - * // ensure `batchLog` is executed once after 1 second of debounced calls - * var source = new EventSource('/stream'); - * source.addEventListener('message', _.debounce(batchLog, 250, { - * 'maxWait': 1000 - * }, false); - */ - function debounce(func, wait, options) { - var args, - maxTimeoutId, - result, - stamp, - thisArg, - timeoutId, - trailingCall, - lastCalled = 0, - maxWait = false, - trailing = true; - - if (!isFunction(func)) { - throw new TypeError; - } - wait = nativeMax(0, wait) || 0; - if (options === true) { - var leading = true; - trailing = false; - } else if (isObject(options)) { - leading = options.leading; - maxWait = 'maxWait' in options && (nativeMax(wait, options.maxWait) || 0); - trailing = 'trailing' in options ? options.trailing : trailing; - } - var delayed = function() { - var remaining = wait - (now() - stamp); - if (remaining <= 0) { - if (maxTimeoutId) { - clearTimeout(maxTimeoutId); - } - var isCalled = trailingCall; - maxTimeoutId = timeoutId = trailingCall = undefined; - if (isCalled) { - lastCalled = now(); - result = func.apply(thisArg, args); - if (!timeoutId && !maxTimeoutId) { - args = thisArg = null; - } - } - } else { - timeoutId = setTimeout(delayed, remaining); - } - }; - - var maxDelayed = function() { - if (timeoutId) { - clearTimeout(timeoutId); - } - maxTimeoutId = timeoutId = trailingCall = undefined; - if (trailing || (maxWait !== wait)) { - lastCalled = now(); - result = func.apply(thisArg, args); - if (!timeoutId && !maxTimeoutId) { - args = thisArg = null; - } - } - }; - - return function() { - args = arguments; - stamp = now(); - thisArg = this; - trailingCall = trailing && (timeoutId || !leading); - - if (maxWait === false) { - var leadingCall = leading && !timeoutId; - } else { - if (!maxTimeoutId && !leading) { - lastCalled = stamp; - } - var remaining = maxWait - (stamp - lastCalled), - isCalled = remaining <= 0; - - if (isCalled) { - if (maxTimeoutId) { - maxTimeoutId = clearTimeout(maxTimeoutId); - } - lastCalled = stamp; - result = func.apply(thisArg, args); - } - else if (!maxTimeoutId) { - maxTimeoutId = setTimeout(maxDelayed, remaining); - } - } - if (isCalled && timeoutId) { - timeoutId = clearTimeout(timeoutId); - } - else if (!timeoutId && wait !== maxWait) { - timeoutId = setTimeout(delayed, wait); - } - if (leadingCall) { - isCalled = true; - result = func.apply(thisArg, args); - } - if (isCalled && !timeoutId && !maxTimeoutId) { - args = thisArg = null; - } - return result; - }; - } - - /** - * Defers executing the `func` function until the current call stack has cleared. - * Additional arguments will be provided to `func` when it is invoked. - * - * @static - * @memberOf _ - * @category Functions - * @param {Function} func The function to defer. - * @param {...*} [arg] Arguments to invoke the function with. - * @returns {number} Returns the timer id. - * @example - * - * _.defer(function(text) { console.log(text); }, 'deferred'); - * // logs 'deferred' after one or more milliseconds - */ - function defer(func) { - if (!isFunction(func)) { - throw new TypeError; - } - var args = slice(arguments, 1); - return setTimeout(function() { func.apply(undefined, args); }, 1); - } - - /** - * Executes the `func` function after `wait` milliseconds. Additional arguments - * will be provided to `func` when it is invoked. - * - * @static - * @memberOf _ - * @category Functions - * @param {Function} func The function to delay. - * @param {number} wait The number of milliseconds to delay execution. - * @param {...*} [arg] Arguments to invoke the function with. - * @returns {number} Returns the timer id. - * @example - * - * _.delay(function(text) { console.log(text); }, 1000, 'later'); - * // => logs 'later' after one second - */ - function delay(func, wait) { - if (!isFunction(func)) { - throw new TypeError; - } - var args = slice(arguments, 2); - return setTimeout(function() { func.apply(undefined, args); }, wait); - } - - /** - * Creates a function that memoizes the result of `func`. If `resolver` is - * provided it will be used to determine the cache key for storing the result - * based on the arguments provided to the memoized function. By default, the - * first argument provided to the memoized function is used as the cache key. - * The `func` is executed with the `this` binding of the memoized function. - * The result cache is exposed as the `cache` property on the memoized function. - * - * @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. - * @example - * - * var fibonacci = _.memoize(function(n) { - * return n < 2 ? n : fibonacci(n - 1) + fibonacci(n - 2); - * }); - * - * fibonacci(9) - * // => 34 - * - * var data = { - * 'fred': { 'name': 'fred', 'age': 40 }, - * 'pebbles': { 'name': 'pebbles', 'age': 1 } - * }; - * - * // modifying the result cache - * var get = _.memoize(function(name) { return data[name]; }, _.identity); - * get('pebbles'); - * // => { 'name': 'pebbles', 'age': 1 } - * - * get.cache.pebbles.name = 'penelope'; - * get('pebbles'); - * // => { 'name': 'penelope', 'age': 1 } - */ - function memoize(func, resolver) { - if (!isFunction(func)) { - throw new TypeError; - } - var memoized = function() { - var cache = memoized.cache, - key = resolver ? resolver.apply(this, arguments) : keyPrefix + arguments[0]; - - return hasOwnProperty.call(cache, key) - ? cache[key] - : (cache[key] = func.apply(this, arguments)); - } - memoized.cache = {}; - return memoized; - } - - /** - * 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. - * - * @static - * @memberOf _ - * @category Functions - * @param {Function} func The function to restrict. - * @returns {Function} Returns the new restricted function. - * @example - * - * var initialize = _.once(createApplication); - * initialize(); - * initialize(); - * // `initialize` executes `createApplication` once - */ - function once(func) { - var ran, - result; - - if (!isFunction(func)) { - throw new TypeError; - } - return function() { - if (ran) { - return result; - } - ran = true; - result = func.apply(this, arguments); - - // 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 provided to the new function. This - * method is similar to `_.bind` except it does **not** alter the `this` binding. - * - * @static - * @memberOf _ - * @category Functions - * @param {Function} func The function to partially apply arguments to. - * @param {...*} [arg] Arguments to be partially applied. - * @returns {Function} Returns the new partially applied function. - * @example - * - * var greet = function(greeting, name) { return greeting + ' ' + name; }; - * var hi = _.partial(greet, 'hi'); - * hi('fred'); - * // => 'hi fred' - */ - function partial(func) { - return createWrapper(func, 16, slice(arguments, 1)); - } - - /** - * This method is like `_.partial` except that `partial` arguments are - * appended to those provided to the new function. - * - * @static - * @memberOf _ - * @category Functions - * @param {Function} func The function to partially apply arguments to. - * @param {...*} [arg] Arguments to be partially applied. - * @returns {Function} Returns the new partially applied function. - * @example - * - * var defaultsDeep = _.partialRight(_.merge, _.defaults); - * - * var options = { - * 'variable': 'data', - * 'imports': { 'jq': $ } - * }; - * - * defaultsDeep(options, _.templateSettings); - * - * options.variable - * // => 'data' - * - * options.imports - * // => { '_': _, 'jq': $ } - */ - function partialRight(func) { - return createWrapper(func, 32, null, slice(arguments, 1)); - } - - /** - * Creates a function that, when executed, will only call the `func` function - * at most once per every `wait` milliseconds. Provide an options object to - * indicate that `func` should be invoked on the leading and/or trailing edge - * of the `wait` timeout. Subsequent calls to the throttled function will - * return the result of the last `func` call. - * - * Note: If `leading` and `trailing` options are `true` `func` will be called - * on the trailing edge of the timeout only if the the throttled function is - * invoked more than once during the `wait` timeout. - * - * @static - * @memberOf _ - * @category Functions - * @param {Function} func The function to throttle. - * @param {number} wait The number of milliseconds to throttle executions to. - * @param {Object} [options] The options object. - * @param {boolean} [options.leading=true] Specify execution on the leading edge of the timeout. - * @param {boolean} [options.trailing=true] Specify execution on the trailing edge of the timeout. - * @returns {Function} Returns the new throttled function. - * @example - * - * // avoid excessively updating the position while scrolling - * var throttled = _.throttle(updatePosition, 100); - * jQuery(window).on('scroll', throttled); - * - * // execute `renewToken` when the click event is fired, but not more than once every 5 minutes - * jQuery('.interactive').on('click', _.throttle(renewToken, 300000, { - * 'trailing': false - * })); - */ - function throttle(func, wait, options) { - var leading = true, - trailing = true; - - if (!isFunction(func)) { - throw new TypeError; - } - if (options === false) { - leading = false; - } else if (isObject(options)) { - leading = 'leading' in options ? options.leading : leading; - trailing = 'trailing' in options ? options.trailing : trailing; - } - debounceOptions.leading = leading; - debounceOptions.maxWait = wait; - debounceOptions.trailing = trailing; - - return debounce(func, wait, debounceOptions); - } - - /** - * Creates a function that provides `value` to the wrapper function as its - * first argument. Additional arguments provided to the function are appended - * to those provided to the wrapper function. The wrapper is executed with - * the `this` binding of the created function. - * - * @static - * @memberOf _ - * @category Functions - * @param {*} value The value to wrap. - * @param {Function} wrapper The wrapper function. - * @returns {Function} Returns the new function. - * @example - * - * var p = _.wrap(_.escape, function(func, text) { - * return '<p>' + func(text) + '</p>'; - * }); - * - * p('Fred, Wilma, & Pebbles'); - * // => '<p>Fred, Wilma, & Pebbles</p>' - */ - function wrap(value, wrapper) { - return createWrapper(wrapper, 16, [value]); - } - - /*--------------------------------------------------------------------------*/ - - /** - * Creates a function that returns `value`. - * - * @static - * @memberOf _ - * @category Utilities - * @param {*} value The value to return from the new function. - * @returns {Function} Returns the new function. - * @example - * - * var object = { 'name': 'fred' }; - * var getter = _.constant(object); - * getter() === object; - * // => true - */ - function constant(value) { - return function() { - return value; - }; - } - - /** - * Produces a callback bound to an optional `thisArg`. If `func` is a property - * name the created callback will return the property value for a given element. - * If `func` is an object the created callback will return `true` for elements - * that contain the equivalent object properties, otherwise it will return `false`. - * - * @static - * @memberOf _ - * @category Utilities - * @param {*} [func=identity] The value to convert to a callback. - * @param {*} [thisArg] The `this` binding of the created callback. - * @param {number} [argCount] The number of arguments the callback accepts. - * @returns {Function} Returns a callback function. - * @example - * - * var characters = [ - * { 'name': 'barney', 'age': 36 }, - * { 'name': 'fred', 'age': 40 } - * ]; - * - * // wrap to create custom callback shorthands - * _.createCallback = _.wrap(_.createCallback, function(func, callback, thisArg) { - * var match = /^(.+?)__([gl]t)(.+)$/.exec(callback); - * return !match ? func(callback, thisArg) : function(object) { - * return match[2] == 'gt' ? object[match[1]] > match[3] : object[match[1]] < match[3]; - * }; - * }); - * - * _.filter(characters, 'age__gt38'); - * // => [{ 'name': 'fred', 'age': 40 }] - */ - function createCallback(func, thisArg, argCount) { - var type = typeof func; - if (func == null || type == 'function') { - return baseCreateCallback(func, thisArg, argCount); - } - // handle "_.pluck" style callback shorthands - if (type != 'object') { - return property(func); - } - var props = keys(func), - key = props[0], - a = func[key]; - - // handle "_.where" style callback shorthands - if (props.length == 1 && a === a && !isObject(a)) { - // fast path the common case of providing an object with a single - // property containing a primitive value - return function(object) { - var b = object[key]; - return a === b && (a !== 0 || (1 / a == 1 / b)); - }; - } - return function(object) { - var length = props.length, - result = false; - - while (length--) { - if (!(result = baseIsEqual(object[props[length]], func[props[length]], null, true))) { - break; - } - } - return result; - }; - } - - /** - * Converts the characters `&`, `<`, `>`, `"`, and `'` in `string` to their - * corresponding HTML entities. - * - * @static - * @memberOf _ - * @category Utilities - * @param {string} string The string to escape. - * @returns {string} Returns the escaped string. - * @example - * - * _.escape('Fred, Wilma, & Pebbles'); - * // => 'Fred, Wilma, & Pebbles' - */ - function escape(string) { - return string == null ? '' : String(string).replace(reUnescapedHtml, escapeHtmlChar); - } - - /** - * This method returns the first argument provided to it. - * - * @static - * @memberOf _ - * @category Utilities - * @param {*} value Any value. - * @returns {*} Returns `value`. - * @example - * - * var object = { 'name': 'fred' }; - * _.identity(object) === object; - * // => true - */ - function identity(value) { - return value; - } - - /** - * Adds function properties of a source object to the destination object. - * If `object` is a function methods will be added to its prototype as well. - * - * @static - * @memberOf _ - * @category Utilities - * @param {Function|Object} [object=lodash] object The destination object. - * @param {Object} source The object of functions to add. - * @param {Object} [options] The options object. - * @param {boolean} [options.chain=true] Specify whether the functions added are chainable. - * @example - * - * function capitalize(string) { - * return string.charAt(0).toUpperCase() + string.slice(1).toLowerCase(); - * } - * - * _.mixin({ 'capitalize': capitalize }); - * _.capitalize('fred'); - * // => 'Fred' - * - * _('fred').capitalize().value(); - * // => 'Fred' - * - * _.mixin({ 'capitalize': capitalize }, { 'chain': false }); - * _('fred').capitalize(); - * // => 'Fred' - */ - function mixin(object, source, options) { - var chain = true, - methodNames = source && functions(source); - - if (!source || (!options && !methodNames.length)) { - if (options == null) { - options = source; - } - ctor = lodashWrapper; - source = object; - object = lodash; - methodNames = functions(source); - } - if (options === false) { - chain = false; - } else if (isObject(options) && 'chain' in options) { - chain = options.chain; - } - var ctor = object, - isFunc = isFunction(ctor); - - forEach(methodNames, function(methodName) { - var func = object[methodName] = source[methodName]; - if (isFunc) { - ctor.prototype[methodName] = function() { - var chainAll = this.__chain__, - value = this.__wrapped__, - args = [value]; - - push.apply(args, arguments); - var result = func.apply(object, args); - if (chain || chainAll) { - if (value === result && isObject(result)) { - return this; - } - result = new ctor(result); - result.__chain__ = chainAll; - } - return result; - }; - } - }); - } - - /** - * Reverts the '_' variable to its previous value and returns a reference to - * the `lodash` function. - * - * @static - * @memberOf _ - * @category Utilities - * @returns {Function} Returns the `lodash` function. - * @example - * - * var lodash = _.noConflict(); - */ - function noConflict() { - context._ = oldDash; - return this; - } - - /** - * A no-operation function. - * - * @static - * @memberOf _ - * @category Utilities - * @example - * - * var object = { 'name': 'fred' }; - * _.noop(object) === undefined; - * // => true - */ - function noop() { - // no operation performed - } - - /** - * Gets the number of milliseconds that have elapsed since the Unix epoch - * (1 January 1970 00:00:00 UTC). - * - * @static - * @memberOf _ - * @category Utilities - * @example - * - * var stamp = _.now(); - * _.defer(function() { console.log(_.now() - stamp); }); - * // => logs the number of milliseconds it took for the deferred function to be called - */ - var now = isNative(now = Date.now) && now || function() { - return new Date().getTime(); - }; - - /** - * Converts the given value into an integer of the specified radix. - * If `radix` is `undefined` or `0` a `radix` of `10` is used unless the - * `value` is a hexadecimal, in which case a `radix` of `16` is used. - * - * Note: This method avoids differences in native ES3 and ES5 `parseInt` - * implementations. See http://es5.github.io/#E. - * - * @static - * @memberOf _ - * @category Utilities - * @param {string} value The value to parse. - * @param {number} [radix] The radix used to interpret the value to parse. - * @returns {number} Returns the new integer value. - * @example - * - * _.parseInt('08'); - * // => 8 - */ - var parseInt = nativeParseInt(whitespace + '08') == 8 ? nativeParseInt : function(value, radix) { - // Firefox < 21 and Opera < 15 follow the ES3 specified implementation of `parseInt` - return nativeParseInt(isString(value) ? value.replace(reLeadingSpacesAndZeros, '') : value, radix || 0); - }; - - /** - * Creates a "_.pluck" style function, which returns the `key` value of a - * given object. - * - * @static - * @memberOf _ - * @category Utilities - * @param {string} key The name of the property to retrieve. - * @returns {Function} Returns the new function. - * @example - * - * var characters = [ - * { 'name': 'fred', 'age': 40 }, - * { 'name': 'barney', 'age': 36 } - * ]; - * - * var getName = _.property('name'); - * - * _.map(characters, getName); - * // => ['barney', 'fred'] - * - * _.sortBy(characters, getName); - * // => [{ 'name': 'barney', 'age': 36 }, { 'name': 'fred', 'age': 40 }] - */ - function property(key) { - return function(object) { - return object[key]; - }; - } - - /** - * Produces a random number between `min` and `max` (inclusive). If only one - * argument is provided a number between `0` and the given number will be - * returned. If `floating` is truey or either `min` or `max` are floats a - * floating-point number will be returned instead of an integer. - * - * @static - * @memberOf _ - * @category Utilities - * @param {number} [min=0] The minimum possible value. - * @param {number} [max=1] The maximum possible value. - * @param {boolean} [floating=false] Specify returning a floating-point number. - * @returns {number} Returns a random number. - * @example - * - * _.random(0, 5); - * // => an integer between 0 and 5 - * - * _.random(5); - * // => also an integer between 0 and 5 - * - * _.random(5, true); - * // => a floating-point number between 0 and 5 - * - * _.random(1.2, 5.2); - * // => a floating-point number between 1.2 and 5.2 - */ - function random(min, max, floating) { - var noMin = min == null, - noMax = max == null; - - if (floating == null) { - if (typeof min == 'boolean' && noMax) { - floating = min; - min = 1; - } - else if (!noMax && typeof max == 'boolean') { - floating = max; - noMax = true; - } - } - if (noMin && noMax) { - max = 1; - } - min = +min || 0; - if (noMax) { - max = min; - min = 0; - } else { - max = +max || 0; - } - if (floating || min % 1 || max % 1) { - var rand = nativeRandom(); - return nativeMin(min + (rand * (max - min + parseFloat('1e-' + ((rand +'').length - 1)))), max); - } - return baseRandom(min, max); - } - - /** - * Resolves the value of property `key` on `object`. If `key` is a function - * it will be invoked with the `this` binding of `object` and its result returned, - * else the property value is returned. If `object` is falsey then `undefined` - * is returned. - * - * @static - * @memberOf _ - * @category Utilities - * @param {Object} object The object to inspect. - * @param {string} key The name of the property to resolve. - * @returns {*} Returns the resolved value. - * @example - * - * var object = { - * 'cheese': 'crumpets', - * 'stuff': function() { - * return 'nonsense'; - * } - * }; - * - * _.result(object, 'cheese'); - * // => 'crumpets' - * - * _.result(object, 'stuff'); - * // => 'nonsense' - */ - function result(object, key) { - if (object) { - var value = object[key]; - return isFunction(value) ? object[key]() : value; - } - } - - /** - * A micro-templating method that handles arbitrary delimiters, preserves - * whitespace, and correctly escapes quotes within interpolated code. - * - * Note: In the development build, `_.template` utilizes sourceURLs for easier - * debugging. See http://www.html5rocks.com/en/tutorials/developertools/sourcemaps/#toc-sourceurl - * - * For more information on precompiling templates see: - * http://lodash.com/custom-builds - * - * For more information on Chrome extension sandboxes see: - * http://developer.chrome.com/stable/extensions/sandboxingEval.html - * - * @static - * @memberOf _ - * @category Utilities - * @param {string} text The template text. - * @param {Object} data The data object used to populate the text. - * @param {Object} [options] The options object. - * @param {RegExp} [options.escape] The "escape" delimiter. - * @param {RegExp} [options.evaluate] The "evaluate" delimiter. - * @param {Object} [options.imports] An object to import into the template as local variables. - * @param {RegExp} [options.interpolate] The "interpolate" delimiter. - * @param {string} [sourceURL] The sourceURL of the template's compiled source. - * @param {string} [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. - * @example - * - * // using the "interpolate" delimiter to create a compiled template - * var compiled = _.template('hello <%= name %>'); - * compiled({ 'name': 'fred' }); - * // => 'hello fred' - * - * // using the "escape" delimiter to escape HTML in data property values - * _.template('<b><%- value %></b>', { 'value': '<script>' }); - * // => '<b><script></b>' - * - * // using the "evaluate" delimiter to generate HTML - * var list = '<% _.forEach(people, function(name) { %><li><%- name %></li><% }); %>'; - * _.template(list, { 'people': ['fred', 'barney'] }); - * // => '<li>fred</li><li>barney</li>' - * - * // using the ES6 delimiter as an alternative to the default "interpolate" delimiter - * _.template('hello ${ name }', { 'name': 'pebbles' }); - * // => 'hello pebbles' - * - * // using the internal `print` function in "evaluate" delimiters - * _.template('<% print("hello " + name); %>!', { 'name': 'barney' }); - * // => 'hello barney!' - * - * // using a custom template delimiters - * _.templateSettings = { - * 'interpolate': /{{([\s\S]+?)}}/g - * }; - * - * _.template('hello {{ name }}!', { 'name': 'mustache' }); - * // => 'hello mustache!' - * - * // using the `imports` option to import jQuery - * var list = '<% jq.each(people, function(name) { %><li><%- name %></li><% }); %>'; - * _.template(list, { 'people': ['fred', 'barney'] }, { 'imports': { 'jq': jQuery } }); - * // => '<li>fred</li><li>barney</li>' - * - * // using the `sourceURL` option to specify a custom sourceURL for the template - * var compiled = _.template('hello <%= name %>', null, { 'sourceURL': '/basic/greeting.jst' }); - * compiled(data); - * // => find the source of "greeting.jst" under the Sources tab or Resources panel of the web inspector - * - * // using the `variable` option to ensure a with-statement isn't used in the compiled template - * var compiled = _.template('hi <%= data.name %>!', null, { 'variable': 'data' }); - * compiled.source; - * // => function(data) { - * var __t, __p = '', __e = _.escape; - * __p += 'hi ' + ((__t = ( data.name )) == null ? '' : __t) + '!'; - * return __p; - * } - * - * // using the `source` property to inline compiled templates for meaningful - * // line numbers in error messages and a stack trace - * fs.writeFileSync(path.join(cwd, 'jst.js'), '\ - * var JST = {\ - * "main": ' + _.template(mainText).source + '\ - * };\ - * '); - */ - function template(text, data, options) { - // based on John Resig's `tmpl` implementation - // http://ejohn.org/blog/javascript-micro-templating/ - // and Laura Doktorova's doT.js - // https://github.com/olado/doT - var settings = lodash.templateSettings; - text = String(text || ''); - - // avoid missing dependencies when `iteratorTemplate` is not defined - options = defaults({}, options, settings); - - var imports = defaults({}, options.imports, settings.imports), - importsKeys = keys(imports), - importsValues = values(imports); - - var isEvaluating, - index = 0, - interpolate = options.interpolate || reNoMatch, - source = "__p += '"; - - // compile the regexp to match each delimiter - var reDelimiters = RegExp( - (options.escape || reNoMatch).source + '|' + - interpolate.source + '|' + - (interpolate === reInterpolate ? reEsTemplate : reNoMatch).source + '|' + - (options.evaluate || reNoMatch).source + '|$' - , 'g'); - - text.replace(reDelimiters, function(match, escapeValue, interpolateValue, esTemplateValue, evaluateValue, offset) { - interpolateValue || (interpolateValue = esTemplateValue); - - // escape characters that cannot be included in string literals - source += text.slice(index, offset).replace(reUnescapedString, escapeStringChar); - - // replace delimiters with snippets - if (escapeValue) { - source += "' +\n__e(" + escapeValue + ") +\n'"; - } - if (evaluateValue) { - isEvaluating = true; - source += "';\n" + evaluateValue + ";\n__p += '"; - } - if (interpolateValue) { - source += "' +\n((__t = (" + interpolateValue + ")) == null ? '' : __t) +\n'"; - } - index = offset + match.length; - - // the JS engine embedded in Adobe products requires returning the `match` - // string in order to produce the correct `offset` value - return match; - }); - - source += "';\n"; - - // if `variable` is not specified, wrap a with-statement around the generated - // code to add the data object to the top of the scope chain - var variable = options.variable, - hasVariable = variable; - - if (!hasVariable) { - variable = 'obj'; - source = 'with (' + variable + ') {\n' + source + '\n}\n'; - } - // cleanup code by stripping empty strings - source = (isEvaluating ? source.replace(reEmptyStringLeading, '') : source) - .replace(reEmptyStringMiddle, '$1') - .replace(reEmptyStringTrailing, '$1;'); - - // frame code as the function body - source = 'function(' + variable + ') {\n' + - (hasVariable ? '' : variable + ' || (' + variable + ' = {});\n') + - "var __t, __p = '', __e = _.escape" + - (isEvaluating - ? ', __j = Array.prototype.join;\n' + - "function print() { __p += __j.call(arguments, '') }\n" - : ';\n' - ) + - source + - 'return __p\n}'; - - // Use a sourceURL for easier debugging. - // http://www.html5rocks.com/en/tutorials/developertools/sourcemaps/#toc-sourceurl - var sourceURL = '\n/*\n//# sourceURL=' + (options.sourceURL || '/lodash/template/source[' + (templateCounter++) + ']') + '\n*/'; - - try { - var result = Function(importsKeys, 'return ' + source + sourceURL).apply(undefined, importsValues); - } catch(e) { - e.source = source; - throw e; - } - if (data) { - return result(data); - } - // provide the compiled function's source by its `toString` method, in - // supported environments, or the `source` property as a convenience for - // inlining compiled templates during the build process - result.source = source; - return result; - } - - /** - * Executes the callback `n` times, returning an array of the results - * of each callback execution. The callback is bound to `thisArg` and invoked - * with one argument; (index). - * - * @static - * @memberOf _ - * @category Utilities - * @param {number} n The number of times to execute the callback. - * @param {Function} callback The function called per iteration. - * @param {*} [thisArg] The `this` binding of `callback`. - * @returns {Array} Returns an array of the results of each `callback` execution. - * @example - * - * var diceRolls = _.times(3, _.partial(_.random, 1, 6)); - * // => [3, 6, 4] - * - * _.times(3, function(n) { mage.castSpell(n); }); - * // => calls `mage.castSpell(n)` three times, passing `n` of `0`, `1`, and `2` respectively - * - * _.times(3, function(n) { this.cast(n); }, mage); - * // => also calls `mage.castSpell(n)` three times - */ - function times(n, callback, thisArg) { - n = (n = +n) > -1 ? n : 0; - var index = -1, - result = Array(n); - - callback = baseCreateCallback(callback, thisArg, 1); - while (++index < n) { - result[index] = callback(index); - } - return result; - } - - /** - * The inverse of `_.escape` this method converts the HTML entities - * `&`, `<`, `>`, `"`, and `'` in `string` to their - * corresponding characters. - * - * @static - * @memberOf _ - * @category Utilities - * @param {string} string The string to unescape. - * @returns {string} Returns the unescaped string. - * @example - * - * _.unescape('Fred, Barney & Pebbles'); - * // => 'Fred, Barney & Pebbles' - */ - function unescape(string) { - return string == null ? '' : String(string).replace(reEscapedHtml, unescapeHtmlChar); - } - - /** - * Generates a unique ID. If `prefix` is provided the ID will be appended to it. - * - * @static - * @memberOf _ - * @category Utilities - * @param {string} [prefix] The value to prefix the ID with. - * @returns {string} Returns the unique ID. - * @example - * - * _.uniqueId('contact_'); - * // => 'contact_104' - * - * _.uniqueId(); - * // => '105' - */ - function uniqueId(prefix) { - var id = ++idCounter; - return String(prefix == null ? '' : prefix) + id; - } - - /*--------------------------------------------------------------------------*/ - - /** - * Creates a `lodash` object that wraps the given value with explicit - * method chaining enabled. - * - * @static - * @memberOf _ - * @category Chaining - * @param {*} value The value to wrap. - * @returns {Object} Returns the wrapper object. - * @example - * - * var characters = [ - * { 'name': 'barney', 'age': 36 }, - * { 'name': 'fred', 'age': 40 }, - * { 'name': 'pebbles', 'age': 1 } - * ]; - * - * var youngest = _.chain(characters) - * .sortBy('age') - * .map(function(chr) { return chr.name + ' is ' + chr.age; }) - * .first() - * .value(); - * // => 'pebbles is 1' - */ - function chain(value) { - value = new lodashWrapper(value); - value.__chain__ = true; - return value; - } - - /** - * Invokes `interceptor` with the `value` as the first argument and then - * returns `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 Chaining - * @param {*} value The value to provide to `interceptor`. - * @param {Function} interceptor The function to invoke. - * @returns {*} Returns `value`. - * @example - * - * _([1, 2, 3, 4]) - * .tap(function(array) { array.pop(); }) - * .reverse() - * .value(); - * // => [3, 2, 1] - */ - function tap(value, interceptor) { - interceptor(value); - return value; - } - - /** - * Enables explicit method chaining on the wrapper object. - * - * @name chain - * @memberOf _ - * @category Chaining - * @returns {*} Returns the wrapper object. - * @example - * - * var characters = [ - * { 'name': 'barney', 'age': 36 }, - * { 'name': 'fred', 'age': 40 } - * ]; - * - * // without explicit chaining - * _(characters).first(); - * // => { 'name': 'barney', 'age': 36 } - * - * // with explicit chaining - * _(characters).chain() - * .first() - * .pick('age') - * .value(); - * // => { 'age': 36 } - */ - function wrapperChain() { - this.__chain__ = true; - return this; - } - - /** - * Produces the `toString` result of the wrapped value. - * - * @name toString - * @memberOf _ - * @category Chaining - * @returns {string} Returns the string result. - * @example - * - * _([1, 2, 3]).toString(); - * // => '1,2,3' - */ - function wrapperToString() { - return String(this.__wrapped__); - } - - /** - * Extracts the wrapped value. - * - * @name valueOf - * @memberOf _ - * @alias value - * @category Chaining - * @returns {*} Returns the wrapped value. - * @example - * - * _([1, 2, 3]).valueOf(); - * // => [1, 2, 3] - */ - function wrapperValueOf() { - return this.__wrapped__; - } - - /*--------------------------------------------------------------------------*/ - - // add functions that return wrapped values when chaining - lodash.after = after; - lodash.assign = assign; - lodash.at = at; - lodash.bind = bind; - lodash.bindAll = bindAll; - lodash.bindKey = bindKey; - lodash.chain = chain; - lodash.compact = compact; - lodash.compose = compose; - lodash.constant = constant; - lodash.countBy = countBy; - lodash.create = create; - lodash.createCallback = createCallback; - lodash.curry = curry; - lodash.debounce = debounce; - lodash.defaults = defaults; - lodash.defer = defer; - lodash.delay = delay; - lodash.difference = difference; - lodash.filter = filter; - lodash.flatten = flatten; - lodash.forEach = forEach; - lodash.forEachRight = forEachRight; - lodash.forIn = forIn; - lodash.forInRight = forInRight; - lodash.forOwn = forOwn; - lodash.forOwnRight = forOwnRight; - lodash.functions = functions; - lodash.groupBy = groupBy; - lodash.indexBy = indexBy; - lodash.initial = initial; - lodash.intersection = intersection; - lodash.invert = invert; - lodash.invoke = invoke; - lodash.keys = keys; - lodash.map = map; - lodash.mapValues = mapValues; - lodash.max = max; - lodash.memoize = memoize; - lodash.merge = merge; - lodash.min = min; - lodash.omit = omit; - lodash.once = once; - lodash.pairs = pairs; - lodash.partial = partial; - lodash.partialRight = partialRight; - lodash.pick = pick; - lodash.pluck = pluck; - lodash.property = property; - lodash.pull = pull; - lodash.range = range; - lodash.reject = reject; - lodash.remove = remove; - lodash.rest = rest; - lodash.shuffle = shuffle; - lodash.sortBy = sortBy; - lodash.tap = tap; - lodash.throttle = throttle; - lodash.times = times; - lodash.toArray = toArray; - lodash.transform = transform; - lodash.union = union; - lodash.uniq = uniq; - lodash.values = values; - lodash.where = where; - lodash.without = without; - lodash.wrap = wrap; - lodash.xor = xor; - lodash.zip = zip; - lodash.zipObject = zipObject; - - // add aliases - lodash.collect = map; - lodash.drop = rest; - lodash.each = forEach; - lodash.eachRight = forEachRight; - lodash.extend = assign; - lodash.methods = functions; - lodash.object = zipObject; - lodash.select = filter; - lodash.tail = rest; - lodash.unique = uniq; - lodash.unzip = zip; - - // add functions to `lodash.prototype` - mixin(lodash); - - /*--------------------------------------------------------------------------*/ - - // add functions that return unwrapped values when chaining - lodash.clone = clone; - lodash.cloneDeep = cloneDeep; - lodash.contains = contains; - lodash.escape = escape; - lodash.every = every; - lodash.find = find; - lodash.findIndex = findIndex; - lodash.findKey = findKey; - lodash.findLast = findLast; - lodash.findLastIndex = findLastIndex; - lodash.findLastKey = findLastKey; - lodash.has = has; - lodash.identity = identity; - lodash.indexOf = indexOf; - lodash.isArguments = isArguments; - lodash.isArray = isArray; - lodash.isBoolean = isBoolean; - lodash.isDate = isDate; - lodash.isElement = isElement; - lodash.isEmpty = isEmpty; - lodash.isEqual = isEqual; - lodash.isFinite = isFinite; - lodash.isFunction = isFunction; - lodash.isNaN = isNaN; - lodash.isNull = isNull; - lodash.isNumber = isNumber; - lodash.isObject = isObject; - lodash.isPlainObject = isPlainObject; - lodash.isRegExp = isRegExp; - lodash.isString = isString; - lodash.isUndefined = isUndefined; - lodash.lastIndexOf = lastIndexOf; - lodash.mixin = mixin; - lodash.noConflict = noConflict; - lodash.noop = noop; - lodash.now = now; - lodash.parseInt = parseInt; - lodash.random = random; - lodash.reduce = reduce; - lodash.reduceRight = reduceRight; - lodash.result = result; - lodash.runInContext = runInContext; - lodash.size = size; - lodash.some = some; - lodash.sortedIndex = sortedIndex; - lodash.template = template; - lodash.unescape = unescape; - lodash.uniqueId = uniqueId; - - // add aliases - lodash.all = every; - lodash.any = some; - lodash.detect = find; - lodash.findWhere = find; - lodash.foldl = reduce; - lodash.foldr = reduceRight; - lodash.include = contains; - lodash.inject = reduce; - - mixin(function() { - var source = {} - forOwn(lodash, function(func, methodName) { - if (!lodash.prototype[methodName]) { - source[methodName] = func; - } - }); - return source; - }(), false); - - /*--------------------------------------------------------------------------*/ - - // add functions capable of returning wrapped and unwrapped values when chaining - lodash.first = first; - lodash.last = last; - lodash.sample = sample; - - // add aliases - lodash.take = first; - lodash.head = first; - - forOwn(lodash, function(func, methodName) { - var callbackable = methodName !== 'sample'; - if (!lodash.prototype[methodName]) { - lodash.prototype[methodName]= function(n, guard) { - var chainAll = this.__chain__, - result = func(this.__wrapped__, n, guard); - - return !chainAll && (n == null || (guard && !(callbackable && typeof n == 'function'))) - ? result - : new lodashWrapper(result, chainAll); - }; - } - }); - - /*--------------------------------------------------------------------------*/ - - /** - * The semantic version number. - * - * @static - * @memberOf _ - * @type string - */ - lodash.VERSION = '2.4.1'; - - // add "Chaining" functions to the wrapper - lodash.prototype.chain = wrapperChain; - lodash.prototype.toString = wrapperToString; - lodash.prototype.value = wrapperValueOf; - lodash.prototype.valueOf = wrapperValueOf; - - // add `Array` functions that return unwrapped values - baseEach(['join', 'pop', 'shift'], function(methodName) { - var func = arrayRef[methodName]; - lodash.prototype[methodName] = function() { - var chainAll = this.__chain__, - result = func.apply(this.__wrapped__, arguments); - - return chainAll - ? new lodashWrapper(result, chainAll) - : result; - }; - }); - - // add `Array` functions that return the existing wrapped value - baseEach(['push', 'reverse', 'sort', 'unshift'], function(methodName) { - var func = arrayRef[methodName]; - lodash.prototype[methodName] = function() { - func.apply(this.__wrapped__, arguments); - return this; - }; - }); - - // add `Array` functions that return new wrapped values - baseEach(['concat', 'slice', 'splice'], function(methodName) { - var func = arrayRef[methodName]; - lodash.prototype[methodName] = function() { - return new lodashWrapper(func.apply(this.__wrapped__, arguments), this.__chain__); - }; - }); - - // avoid array-like object bugs with `Array#shift` and `Array#splice` - // in IE < 9, Firefox < 10, Narwhal, and RingoJS - if (!support.spliceObjects) { - baseEach(['pop', 'shift', 'splice'], function(methodName) { - var func = arrayRef[methodName], - isSplice = methodName == 'splice'; - - lodash.prototype[methodName] = function() { - var chainAll = this.__chain__, - value = this.__wrapped__, - result = func.apply(value, arguments); - - if (value.length === 0) { - delete value[0]; - } - return (chainAll || isSplice) - ? new lodashWrapper(result, chainAll) - : result; - }; - }); - } - - return lodash; - } - - /*--------------------------------------------------------------------------*/ - - // expose Lo-Dash - var _ = runInContext(); - - // some AMD build optimizers like r.js check for condition patterns like the following: - if (typeof define == 'function' && typeof define.amd == 'object' && define.amd) { - // Expose Lo-Dash to the global object even when an AMD loader is present in - // case Lo-Dash is loaded with a RequireJS shim config. - // See http://requirejs.org/docs/api.html#config-shim - root._ = _; - - // define as an anonymous module so, through path mapping, it can be - // referenced as the "underscore" module - define(function() { - return _; - }); - } - // check for `exports` after `define` in case a build optimizer adds an `exports` object - else if (freeExports && freeModule) { - // in Node.js or RingoJS - if (moduleExports) { - (freeModule.exports = _)._ = _; - } - // in Narwhal or Rhino -require - else { - freeExports._ = _; - } - } - else { - // in a browser or Rhino - root._ = _; - } -}.call(this)); |