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Edit File : underscore.js \| Size : 67.12 KB
(function (global, factory) { typeof exports === 'object' && typeof module !== 'undefined' ? module.exports = factory() : typeof define === 'function' && define.amd ? define('underscore', factory) : (global = typeof globalThis !== 'undefined' ? globalThis : global \|\| self, (function () { var current = global._; var exports = global._ = factory(); exports.noConflict = function () { global._ = current; return exports; }; }())); }(this, (function () { // Underscore.js 1.13.7 // https://underscorejs.org // (c) 2009-2024 Jeremy Ashkenas, Julian Gonggrijp, and DocumentCloud and Investigative Reporters & Editors // Underscore may be freely distributed under the MIT license. // Current version. var VERSION = '1.13.7'; // Establish the root object, `window` (`self`) in the browser, `global` // on the server, or `this` in some virtual machines. We use `self` // instead of `window` for `WebWorker` support. var root = (typeof self == 'object' && self.self === self && self) \|\| (typeof global == 'object' && global.global === global && global) \|\| Function('return this')() \|\| {}; // Save bytes in the minified (but not gzipped) version: var ArrayProto = Array.prototype, ObjProto = Object.prototype; var SymbolProto = typeof Symbol !== 'undefined' ? Symbol.prototype : null; // Create quick reference variables for speed access to core prototypes. var push = ArrayProto.push, slice = ArrayProto.slice, toString = ObjProto.toString, hasOwnProperty = ObjProto.hasOwnProperty; // Modern feature detection. var supportsArrayBuffer = typeof ArrayBuffer !== 'undefined', supportsDataView = typeof DataView !== 'undefined'; // All ECMAScript 5+ native function implementations that we hope to use // are declared here. var nativeIsArray = Array.isArray, nativeKeys = Object.keys, nativeCreate = Object.create, nativeIsView = supportsArrayBuffer && ArrayBuffer.isView; // Create references to these builtin functions because we override them. var _isNaN = isNaN, _isFinite = isFinite; // Keys in IE < 9 that won't be iterated by `for key in ...` and thus missed. var hasEnumBug = !{toString: null}.propertyIsEnumerable('toString'); var nonEnumerableProps = ['valueOf', 'isPrototypeOf', 'toString', 'propertyIsEnumerable', 'hasOwnProperty', 'toLocaleString']; // The largest integer that can be represented exactly. var MAX_ARRAY_INDEX = Math.pow(2, 53) - 1; // Some functions take a variable number of arguments, or a few expected // arguments at the beginning and then a variable number of values to operate // on. This helper accumulates all remaining arguments past the function’s // argument length (or an explicit `startIndex`), into an array that becomes // the last argument. Similar to ES6’s "rest parameter". function restArguments(func, startIndex) { startIndex = startIndex == null ? func.length - 1 : +startIndex; return function() { var length = Math.max(arguments.length - startIndex, 0), rest = Array(length), index = 0; for (; index < length; index++) { rest[index] = arguments[index + startIndex]; } switch (startIndex) { case 0: return func.call(this, rest); case 1: return func.call(this, arguments[0], rest); case 2: return func.call(this, arguments[0], arguments[1], rest); } var args = Array(startIndex + 1); for (index = 0; index < startIndex; index++) { args[index] = arguments[index]; } args[startIndex] = rest; return func.apply(this, args); }; } // Is a given variable an object? function isObject(obj) { var type = typeof obj; return type === 'function' \|\| (type === 'object' && !!obj); } // Is a given value equal to null? function isNull(obj) { return obj === null; } // Is a given variable undefined? function isUndefined(obj) { return obj === void 0; } // Is a given value a boolean? function isBoolean(obj) { return obj === true \|\| obj === false \|\| toString.call(obj) === '[object Boolean]'; } // Is a given value a DOM element? function isElement(obj) { return !!(obj && obj.nodeType === 1); } // Internal function for creating a `toString`-based type tester. function tagTester(name) { var tag = '[object ' + name + ']'; return function(obj) { return toString.call(obj) === tag; }; } var isString = tagTester('String'); var isNumber = tagTester('Number'); var isDate = tagTester('Date'); var isRegExp = tagTester('RegExp'); var isError = tagTester('Error'); var isSymbol = tagTester('Symbol'); var isArrayBuffer = tagTester('ArrayBuffer'); var isFunction = tagTester('Function'); // Optimize `isFunction` if appropriate. Work around some `typeof` bugs in old // v8, IE 11 (#1621), Safari 8 (#1929), and PhantomJS (#2236). var nodelist = root.document && root.document.childNodes; if (typeof /./ != 'function' && typeof Int8Array != 'object' && typeof nodelist != 'function') { isFunction = function(obj) { return typeof obj == 'function' \|\| false; }; } var isFunction$1 = isFunction; var hasObjectTag = tagTester('Object'); // In IE 10 - Edge 13, `DataView` has string tag `'[object Object]'`. // In IE 11, the most common among them, this problem also applies to // `Map`, `WeakMap` and `Set`. // Also, there are cases where an application can override the native // `DataView` object, in cases like that we can't use the constructor // safely and should just rely on alternate `DataView` checks var hasDataViewBug = ( supportsDataView && (!/\[native code\]/.test(String(DataView)) \|\| hasObjectTag(new DataView(new ArrayBuffer(8)))) ), isIE11 = (typeof Map !== 'undefined' && hasObjectTag(new Map)); var isDataView = tagTester('DataView'); // In IE 10 - Edge 13, we need a different heuristic // to determine whether an object is a `DataView`. // Also, in cases where the native `DataView` is // overridden we can't rely on the tag itself. function alternateIsDataView(obj) { return obj != null && isFunction$1(obj.getInt8) && isArrayBuffer(obj.buffer); } var isDataView$1 = (hasDataViewBug ? alternateIsDataView : isDataView); // Is a given value an array? // Delegates to ECMA5's native `Array.isArray`. var isArray = nativeIsArray \|\| tagTester('Array'); // Internal function to check whether `key` is an own property name of `obj`. function has$1(obj, key) { return obj != null && hasOwnProperty.call(obj, key); } var isArguments = tagTester('Arguments'); // Define a fallback version of the method in browsers (ahem, IE < 9), where // there isn't any inspectable "Arguments" type. (function() { if (!isArguments(arguments)) { isArguments = function(obj) { return has$1(obj, 'callee'); }; } }()); var isArguments$1 = isArguments; // Is a given object a finite number? function isFinite$1(obj) { return !isSymbol(obj) && _isFinite(obj) && !isNaN(parseFloat(obj)); } // Is the given value `NaN`? function isNaN$1(obj) { return isNumber(obj) && _isNaN(obj); } // Predicate-generating function. Often useful outside of Underscore. function constant(value) { return function() { return value; }; } // Common internal logic for `isArrayLike` and `isBufferLike`. function createSizePropertyCheck(getSizeProperty) { return function(collection) { var sizeProperty = getSizeProperty(collection); return typeof sizeProperty == 'number' && sizeProperty >= 0 && sizeProperty <= MAX_ARRAY_INDEX; } } // Internal helper to generate a function to obtain property `key` from `obj`. function shallowProperty(key) { return function(obj) { return obj == null ? void 0 : obj[key]; }; } // Internal helper to obtain the `byteLength` property of an object. var getByteLength = shallowProperty('byteLength'); // Internal helper to determine whether we should spend extensive checks against // `ArrayBuffer` et al. var isBufferLike = createSizePropertyCheck(getByteLength); // Is a given value a typed array? var typedArrayPattern = /\[object ((I\|Ui)nt(8\|16\|32)\|Float(32\|64)\|Uint8Clamped\|Big(I\|Ui)nt64)Array\]/; function isTypedArray(obj) { // `ArrayBuffer.isView` is the most future-proof, so use it when available. // Otherwise, fall back on the above regular expression. return nativeIsView ? (nativeIsView(obj) && !isDataView$1(obj)) : isBufferLike(obj) && typedArrayPattern.test(toString.call(obj)); } var isTypedArray$1 = supportsArrayBuffer ? isTypedArray : constant(false); // Internal helper to obtain the `length` property of an object. var getLength = shallowProperty('length'); // Internal helper to create a simple lookup structure. // `collectNonEnumProps` used to depend on `_.contains`, but this led to // circular imports. `emulatedSet` is a one-off solution that only works for // arrays of strings. function emulatedSet(keys) { var hash = {}; for (var l = keys.length, i = 0; i < l; ++i) hash[keys[i]] = true; return { contains: function(key) { return hash[key] === true; }, push: function(key) { hash[key] = true; return keys.push(key); } }; } // Internal helper. Checks `keys` for the presence of keys in IE < 9 that won't // be iterated by `for key in ...` and thus missed. Extends `keys` in place if // needed. function collectNonEnumProps(obj, keys) { keys = emulatedSet(keys); var nonEnumIdx = nonEnumerableProps.length; var constructor = obj.constructor; var proto = (isFunction$1(constructor) && constructor.prototype) \|\| ObjProto; // Constructor is a special case. var prop = 'constructor'; if (has$1(obj, prop) && !keys.contains(prop)) keys.push(prop); while (nonEnumIdx--) { prop = nonEnumerableProps[nonEnumIdx]; if (prop in obj && obj[prop] !== proto[prop] && !keys.contains(prop)) { keys.push(prop); } } } // Retrieve the names of an object's own properties. // Delegates to ECMAScript 5's native `Object.keys`. function keys(obj) { if (!isObject(obj)) return []; if (nativeKeys) return nativeKeys(obj); var keys = []; for (var key in obj) if (has$1(obj, key)) keys.push(key); // Ahem, IE < 9. if (hasEnumBug) collectNonEnumProps(obj, keys); return keys; } // Is a given array, string, or object empty? // An "empty" object has no enumerable own-properties. function isEmpty(obj) { if (obj == null) return true; // Skip the more expensive `toString`-based type checks if `obj` has no // `.length`. var length = getLength(obj); if (typeof length == 'number' && ( isArray(obj) \|\| isString(obj) \|\| isArguments$1(obj) )) return length === 0; return getLength(keys(obj)) === 0; } // Returns whether an object has a given set of `key:value` pairs. function isMatch(object, attrs) { var _keys = keys(attrs), length = _keys.length; if (object == null) return !length; var obj = Object(object); for (var i = 0; i < length; i++) { var key = _keys[i]; if (attrs[key] !== obj[key] \|\| !(key in obj)) return false; } return true; } // If Underscore is called as a function, it returns a wrapped object that can // be used OO-style. This wrapper holds altered versions of all functions added // through `_.mixin`. Wrapped objects may be chained. function _$1(obj) { if (obj instanceof _$1) return obj; if (!(this instanceof _$1)) return new _$1(obj); this._wrapped = obj; } _$1.VERSION = VERSION; // Extracts the result from a wrapped and chained object. _$1.prototype.value = function() { return this._wrapped; }; // Provide unwrapping proxies for some methods used in engine operations // such as arithmetic and JSON stringification. _$1.prototype.valueOf = _$1.prototype.toJSON = _$1.prototype.value; _$1.prototype.toString = function() { return String(this._wrapped); }; // Internal function to wrap or shallow-copy an ArrayBuffer, // typed array or DataView to a new view, reusing the buffer. function toBufferView(bufferSource) { return new Uint8Array( bufferSource.buffer \|\| bufferSource, bufferSource.byteOffset \|\| 0, getByteLength(bufferSource) ); } // We use this string twice, so give it a name for minification. var tagDataView = '[object DataView]'; // Internal recursive comparison function for `_.isEqual`. function eq(a, b, aStack, bStack) { // Identical objects are equal. `0 === -0`, but they aren't identical. // See the [Harmony `egal` proposal](https://wiki.ecmascript.org/doku.php?id=harmony:egal). if (a === b) return a !== 0 \|\| 1 / a === 1 / b; // `null` or `undefined` only equal to itself (strict comparison). if (a == null \|\| b == null) return false; // `NaN`s are equivalent, but non-reflexive. if (a !== a) return b !== b; // Exhaust primitive checks var type = typeof a; if (type !== 'function' && type !== 'object' && typeof b != 'object') return false; return deepEq(a, b, aStack, bStack); } // Internal recursive comparison function for `_.isEqual`. function deepEq(a, b, aStack, bStack) { // Unwrap any wrapped objects. if (a instanceof _$1) a = a._wrapped; if (b instanceof _$1) b = b._wrapped; // Compare `[[Class]]` names. var className = toString.call(a); if (className !== toString.call(b)) return false; // Work around a bug in IE 10 - Edge 13. if (hasDataViewBug && className == '[object Object]' && isDataView$1(a)) { if (!isDataView$1(b)) return false; className = tagDataView; } switch (className) { // These types are compared by value. case '[object RegExp]': // RegExps are coerced to strings for comparison (Note: '' + /a/i === '/a/i') case '[object String]': // Primitives and their corresponding object wrappers are equivalent; thus, `"5"` is // equivalent to `new String("5")`. return '' + a === '' + b; case '[object Number]': // `NaN`s are equivalent, but non-reflexive. // Object(NaN) is equivalent to NaN. if (+a !== +a) return +b !== +b; // An `egal` comparison is performed for other numeric values. return +a === 0 ? 1 / +a === 1 / b : +a === +b; case '[object Date]': case '[object Boolean]': // Coerce dates and booleans to numeric primitive values. Dates are compared by their // millisecond representations. Note that invalid dates with millisecond representations // of `NaN` are not equivalent. return +a === +b; case '[object Symbol]': return SymbolProto.valueOf.call(a) === SymbolProto.valueOf.call(b); case '[object ArrayBuffer]': case tagDataView: // Coerce to typed array so we can fall through. return deepEq(toBufferView(a), toBufferView(b), aStack, bStack); } var areArrays = className === '[object Array]'; if (!areArrays && isTypedArray$1(a)) { var byteLength = getByteLength(a); if (byteLength !== getByteLength(b)) return false; if (a.buffer === b.buffer && a.byteOffset === b.byteOffset) return true; areArrays = true; } if (!areArrays) { if (typeof a != 'object' \|\| typeof b != 'object') return false; // Objects with different constructors are not equivalent, but `Object`s or `Array`s // from different frames are. var aCtor = a.constructor, bCtor = b.constructor; if (aCtor !== bCtor && !(isFunction$1(aCtor) && aCtor instanceof aCtor && isFunction$1(bCtor) && bCtor instanceof bCtor) && ('constructor' in a && 'constructor' in b)) { return false; } } // Assume equality for cyclic structures. The algorithm for detecting cyclic // structures is adapted from ES 5.1 section 15.12.3, abstract operation `JO`. // Initializing stack of traversed objects. // It's done here since we only need them for objects and arrays comparison. aStack = aStack \|\| []; bStack = bStack \|\| []; var length = aStack.length; while (length--) { // Linear search. Performance is inversely proportional to the number of // unique nested structures. if (aStack[length] === a) return bStack[length] === b; } // Add the first object to the stack of traversed objects. aStack.push(a); bStack.push(b); // Recursively compare objects and arrays. if (areArrays) { // Compare array lengths to determine if a deep comparison is necessary. length = a.length; if (length !== b.length) return false; // Deep compare the contents, ignoring non-numeric properties. while (length--) { if (!eq(a[length], b[length], aStack, bStack)) return false; } } else { // Deep compare objects. var _keys = keys(a), key; length = _keys.length; // Ensure that both objects contain the same number of properties before comparing deep equality. if (keys(b).length !== length) return false; while (length--) { // Deep compare each member key = _keys[length]; if (!(has$1(b, key) && eq(a[key], b[key], aStack, bStack))) return false; } } // Remove the first object from the stack of traversed objects. aStack.pop(); bStack.pop(); return true; } // Perform a deep comparison to check if two objects are equal. function isEqual(a, b) { return eq(a, b); } // Retrieve all the enumerable property names of an object. function allKeys(obj) { if (!isObject(obj)) return []; var keys = []; for (var key in obj) keys.push(key); // Ahem, IE < 9. if (hasEnumBug) collectNonEnumProps(obj, keys); return keys; } // Since the regular `Object.prototype.toString` type tests don't work for // some types in IE 11, we use a fingerprinting heuristic instead, based // on the methods. It's not great, but it's the best we got. // The fingerprint method lists are defined below. function ie11fingerprint(methods) { var length = getLength(methods); return function(obj) { if (obj == null) return false; // `Map`, `WeakMap` and `Set` have no enumerable keys. var keys = allKeys(obj); if (getLength(keys)) return false; for (var i = 0; i < length; i++) { if (!isFunction$1(obj[methods[i]])) return false; } // If we are testing against `WeakMap`, we need to ensure that // `obj` doesn't have a `forEach` method in order to distinguish // it from a regular `Map`. return methods !== weakMapMethods \|\| !isFunction$1(obj[forEachName]); }; } // In the interest of compact minification, we write // each string in the fingerprints only once. var forEachName = 'forEach', hasName = 'has', commonInit = ['clear', 'delete'], mapTail = ['get', hasName, 'set']; // `Map`, `WeakMap` and `Set` each have slightly different // combinations of the above sublists. var mapMethods = commonInit.concat(forEachName, mapTail), weakMapMethods = commonInit.concat(mapTail), setMethods = ['add'].concat(commonInit, forEachName, hasName); var isMap = isIE11 ? ie11fingerprint(mapMethods) : tagTester('Map'); var isWeakMap = isIE11 ? ie11fingerprint(weakMapMethods) : tagTester('WeakMap'); var isSet = isIE11 ? ie11fingerprint(setMethods) : tagTester('Set'); var isWeakSet = tagTester('WeakSet'); // Retrieve the values of an object's properties. function values(obj) { var _keys = keys(obj); var length = _keys.length; var values = Array(length); for (var i = 0; i < length; i++) { values[i] = obj[_keys[i]]; } return values; } // Convert an object into a list of `[key, value]` pairs. // The opposite of `_.object` with one argument. function pairs(obj) { var _keys = keys(obj); var length = _keys.length; var pairs = Array(length); for (var i = 0; i < length; i++) { pairs[i] = [_keys[i], obj[_keys[i]]]; } return pairs; } // Invert the keys and values of an object. The values must be serializable. function invert(obj) { var result = {}; var _keys = keys(obj); for (var i = 0, length = _keys.length; i < length; i++) { result[obj[_keys[i]]] = _keys[i]; } return result; } // Return a sorted list of the function names available on the object. function functions(obj) { var names = []; for (var key in obj) { if (isFunction$1(obj[key])) names.push(key); } return names.sort(); } // An internal function for creating assigner functions. function createAssigner(keysFunc, defaults) { return function(obj) { var length = arguments.length; if (defaults) obj = Object(obj); if (length < 2 \|\| obj == null) return obj; for (var index = 1; index < length; index++) { var source = arguments[index], keys = keysFunc(source), l = keys.length; for (var i = 0; i < l; i++) { var key = keys[i]; if (!defaults \|\| obj[key] === void 0) obj[key] = source[key]; } } return obj; }; } // Extend a given object with all the properties in passed-in object(s). var extend = createAssigner(allKeys); // Assigns a given object with all the own properties in the passed-in // object(s). // (https://developer.mozilla.org/docs/Web/JavaScript/Reference/Global_Objects/Object/assign) var extendOwn = createAssigner(keys); // Fill in a given object with default properties. var defaults = createAssigner(allKeys, true); // Create a naked function reference for surrogate-prototype-swapping. function ctor() { return function(){}; } // An internal function for creating a new object that inherits from another. function baseCreate(prototype) { if (!isObject(prototype)) return {}; if (nativeCreate) return nativeCreate(prototype); var Ctor = ctor(); Ctor.prototype = prototype; var result = new Ctor; Ctor.prototype = null; return result; } // Creates an object that inherits from the given prototype object. // If additional properties are provided then they will be added to the // created object. function create(prototype, props) { var result = baseCreate(prototype); if (props) extendOwn(result, props); return result; } // Create a (shallow-cloned) duplicate of an object. function clone(obj) { if (!isObject(obj)) return obj; return isArray(obj) ? obj.slice() : extend({}, obj); } // Invokes `interceptor` with the `obj` and then returns `obj`. // The primary purpose of this method is to "tap into" a method chain, in // order to perform operations on intermediate results within the chain. function tap(obj, interceptor) { interceptor(obj); return obj; } // Normalize a (deep) property `path` to array. // Like `_.iteratee`, this function can be customized. function toPath$1(path) { return isArray(path) ? path : [path]; } _$1.toPath = toPath$1; // Internal wrapper for `_.toPath` to enable minification. // Similar to `cb` for `_.iteratee`. function toPath(path) { return _$1.toPath(path); } // Internal function to obtain a nested property in `obj` along `path`. function deepGet(obj, path) { var length = path.length; for (var i = 0; i < length; i++) { if (obj == null) return void 0; obj = obj[path[i]]; } return length ? obj : void 0; } // Get the value of the (deep) property on `path` from `object`. // If any property in `path` does not exist or if the value is // `undefined`, return `defaultValue` instead. // The `path` is normalized through `_.toPath`. function get(object, path, defaultValue) { var value = deepGet(object, toPath(path)); return isUndefined(value) ? defaultValue : value; } // Shortcut function for checking if an object has a given property directly on // itself (in other words, not on a prototype). Unlike the internal `has` // function, this public version can also traverse nested properties. function has(obj, path) { path = toPath(path); var length = path.length; for (var i = 0; i < length; i++) { var key = path[i]; if (!has$1(obj, key)) return false; obj = obj[key]; } return !!length; } // Keep the identity function around for default iteratees. function identity(value) { return value; } // Returns a predicate for checking whether an object has a given set of // `key:value` pairs. function matcher(attrs) { attrs = extendOwn({}, attrs); return function(obj) { return isMatch(obj, attrs); }; } // Creates a function that, when passed an object, will traverse that object’s // properties down the given `path`, specified as an array of keys or indices. function property(path) { path = toPath(path); return function(obj) { return deepGet(obj, path); }; } // Internal function that returns an efficient (for current engines) version // of the passed-in callback, to be repeatedly applied in other Underscore // functions. function optimizeCb(func, context, argCount) { if (context === void 0) return func; switch (argCount == null ? 3 : argCount) { case 1: return function(value) { return func.call(context, value); }; // The 2-argument case is omitted because we’re not using it. case 3: return function(value, index, collection) { return func.call(context, value, index, collection); }; case 4: return function(accumulator, value, index, collection) { return func.call(context, accumulator, value, index, collection); }; } return function() { return func.apply(context, arguments); }; } // An internal function to generate callbacks that can be applied to each // element in a collection, returning the desired result — either `_.identity`, // an arbitrary callback, a property matcher, or a property accessor. function baseIteratee(value, context, argCount) { if (value == null) return identity; if (isFunction$1(value)) return optimizeCb(value, context, argCount); if (isObject(value) && !isArray(value)) return matcher(value); return property(value); } // External wrapper for our callback generator. Users may customize // `_.iteratee` if they want additional predicate/iteratee shorthand styles. // This abstraction hides the internal-only `argCount` argument. function iteratee(value, context) { return baseIteratee(value, context, Infinity); } _$1.iteratee = iteratee; // The function we call internally to generate a callback. It invokes // `_.iteratee` if overridden, otherwise `baseIteratee`. function cb(value, context, argCount) { if (_$1.iteratee !== iteratee) return _$1.iteratee(value, context); return baseIteratee(value, context, argCount); } // Returns the results of applying the `iteratee` to each element of `obj`. // In contrast to `_.map` it returns an object. function mapObject(obj, iteratee, context) { iteratee = cb(iteratee, context); var _keys = keys(obj), length = _keys.length, results = {}; for (var index = 0; index < length; index++) { var currentKey = _keys[index]; results[currentKey] = iteratee(obj[currentKey], currentKey, obj); } return results; } // Predicate-generating function. Often useful outside of Underscore. function noop(){} // Generates a function for a given object that returns a given property. function propertyOf(obj) { if (obj == null) return noop; return function(path) { return get(obj, path); }; } // Run a function n times. function times(n, iteratee, context) { var accum = Array(Math.max(0, n)); iteratee = optimizeCb(iteratee, context, 1); for (var i = 0; i < n; i++) accum[i] = iteratee(i); return accum; } // Return a random integer between `min` and `max` (inclusive). function random(min, max) { if (max == null) { max = min; min = 0; } return min + Math.floor(Math.random() * (max - min + 1)); } // A (possibly faster) way to get the current timestamp as an integer. var now = Date.now \|\| function() { return new Date().getTime(); }; // Internal helper to generate functions for escaping and unescaping strings // to/from HTML interpolation. function createEscaper(map) { var escaper = function(match) { return map[match]; }; // Regexes for identifying a key that needs to be escaped. var source = '(?:' + keys(map).join('\|') + ')'; var testRegexp = RegExp(source); var replaceRegexp = RegExp(source, 'g'); return function(string) { string = string == null ? '' : '' + string; return testRegexp.test(string) ? string.replace(replaceRegexp, escaper) : string; }; } // Internal list of HTML entities for escaping. var escapeMap = { '&': '&', '<': '<', '>': '>', '"': '"', "'": ''', '`': '`' }; // Function for escaping strings to HTML interpolation. var _escape = createEscaper(escapeMap); // Internal list of HTML entities for unescaping. var unescapeMap = invert(escapeMap); // Function for unescaping strings from HTML interpolation. var _unescape = createEscaper(unescapeMap); // By default, Underscore uses ERB-style template delimiters. Change the // following template settings to use alternative delimiters. var templateSettings = _$1.templateSettings = { evaluate: /<%([\s\S]+?)%>/g, interpolate: /<%=([\s\S]+?)%>/g, escape: /<%-([\s\S]+?)%>/g }; // When customizing `_.templateSettings`, if you don't want to define an // interpolation, evaluation or escaping regex, we need one that is // guaranteed not to match. var noMatch = /(.)^/; // Certain characters need to be escaped so that they can be put into a // string literal. var escapes = { "'": "'", '\\': '\\', '\r': 'r', '\n': 'n', '\u2028': 'u2028', '\u2029': 'u2029' }; var escapeRegExp = /\\\|'\|\r\|\n\|\u2028\|\u2029/g; function escapeChar(match) { return '\\' + escapes[match]; } // In order to prevent third-party code injection through // `_.templateSettings.variable`, we test it against the following regular // expression. It is intentionally a bit more liberal than just matching valid // identifiers, but still prevents possible loopholes through defaults or // destructuring assignment. var bareIdentifier = /^\s(\w\|\$)+\s$/; // JavaScript micro-templating, similar to John Resig's implementation. // Underscore templating handles arbitrary delimiters, preserves whitespace, // and correctly escapes quotes within interpolated code. // NB: `oldSettings` only exists for backwards compatibility. function template(text, settings, oldSettings) { if (!settings && oldSettings) settings = oldSettings; settings = defaults({}, settings, _$1.templateSettings); // Combine delimiters into one regular expression via alternation. var matcher = RegExp([ (settings.escape \|\| noMatch).source, (settings.interpolate \|\| noMatch).source, (settings.evaluate \|\| noMatch).source ].join('\|') + '\|$', 'g'); // Compile the template source, escaping string literals appropriately. var index = 0; var source = "__p+='"; text.replace(matcher, function(match, escape, interpolate, evaluate, offset) { source += text.slice(index, offset).replace(escapeRegExp, escapeChar); index = offset + match.length; if (escape) { source += "'+\n((__t=(" + escape + "))==null?'':_.escape(__t))+\n'"; } else if (interpolate) { source += "'+\n((__t=(" + interpolate + "))==null?'':__t)+\n'"; } else if (evaluate) { source += "';\n" + evaluate + "\n__p+='"; } // Adobe VMs need the match returned to produce the correct offset. return match; }); source += "';\n"; var argument = settings.variable; if (argument) { // Insure against third-party code injection. (CVE-2021-23358) if (!bareIdentifier.test(argument)) throw new Error( 'variable is not a bare identifier: ' + argument ); } else { // If a variable is not specified, place data values in local scope. source = 'with(obj\|\|{}){\n' + source + '}\n'; argument = 'obj'; } source = "var __t,__p='',__j=Array.prototype.join," + "print=function(){__p+=__j.call(arguments,'');};\n" + source + 'return __p;\n'; var render; try { render = new Function(argument, '_', source); } catch (e) { e.source = source; throw e; } var template = function(data) { return render.call(this, data, _$1); }; // Provide the compiled source as a convenience for precompilation. template.source = 'function(' + argument + '){\n' + source + '}'; return template; } // Traverses the children of `obj` along `path`. If a child is a function, it // is invoked with its parent as context. Returns the value of the final // child, or `fallback` if any child is undefined. function result(obj, path, fallback) { path = toPath(path); var length = path.length; if (!length) { return isFunction$1(fallback) ? fallback.call(obj) : fallback; } for (var i = 0; i < length; i++) { var prop = obj == null ? void 0 : obj[path[i]]; if (prop === void 0) { prop = fallback; i = length; // Ensure we don't continue iterating. } obj = isFunction$1(prop) ? prop.call(obj) : prop; } return obj; } // Generate a unique integer id (unique within the entire client session). // Useful for temporary DOM ids. var idCounter = 0; function uniqueId(prefix) { var id = ++idCounter + ''; return prefix ? prefix + id : id; } // Start chaining a wrapped Underscore object. function chain(obj) { var instance = _$1(obj); instance._chain = true; return instance; } // Internal function to execute `sourceFunc` bound to `context` with optional // `args`. Determines whether to execute a function as a constructor or as a // normal function. function executeBound(sourceFunc, boundFunc, context, callingContext, args) { if (!(callingContext instanceof boundFunc)) return sourceFunc.apply(context, args); var self = baseCreate(sourceFunc.prototype); var result = sourceFunc.apply(self, args); if (isObject(result)) return result; return self; } // Partially apply a function by creating a version that has had some of its // arguments pre-filled, without changing its dynamic `this` context. `_` acts // as a placeholder by default, allowing any combination of arguments to be // pre-filled. Set `_.partial.placeholder` for a custom placeholder argument. var partial = restArguments(function(func, boundArgs) { var placeholder = partial.placeholder; var bound = function() { var position = 0, length = boundArgs.length; var args = Array(length); for (var i = 0; i < length; i++) { args[i] = boundArgs[i] === placeholder ? arguments[position++] : boundArgs[i]; } while (position < arguments.length) args.push(arguments[position++]); return executeBound(func, bound, this, this, args); }; return bound; }); partial.placeholder = _$1; // Create a function bound to a given object (assigning `this`, and arguments, // optionally). var bind = restArguments(function(func, context, args) { if (!isFunction$1(func)) throw new TypeError('Bind must be called on a function'); var bound = restArguments(function(callArgs) { return executeBound(func, bound, context, this, args.concat(callArgs)); }); return bound; }); // Internal helper for collection methods to determine whether a collection // should be iterated as an array or as an object. // Related: https://people.mozilla.org/~jorendorff/es6-draft.html#sec-tolength // Avoids a very nasty iOS 8 JIT bug on ARM-64. #2094 var isArrayLike = createSizePropertyCheck(getLength); // Internal implementation of a recursive `flatten` function. function flatten$1(input, depth, strict, output) { output = output \|\| []; if (!depth && depth !== 0) { depth = Infinity; } else if (depth <= 0) { return output.concat(input); } var idx = output.length; for (var i = 0, length = getLength(input); i < length; i++) { var value = input[i]; if (isArrayLike(value) && (isArray(value) \|\| isArguments$1(value))) { // Flatten current level of array or arguments object. if (depth > 1) { flatten$1(value, depth - 1, strict, output); idx = output.length; } else { var j = 0, len = value.length; while (j < len) output[idx++] = value[j++]; } } else if (!strict) { output[idx++] = value; } } return output; } // Bind a number of an object's methods to that object. Remaining arguments // are the method names to be bound. Useful for ensuring that all callbacks // defined on an object belong to it. var bindAll = restArguments(function(obj, keys) { keys = flatten$1(keys, false, false); var index = keys.length; if (index < 1) throw new Error('bindAll must be passed function names'); while (index--) { var key = keys[index]; obj[key] = bind(obj[key], obj); } return obj; }); // Memoize an expensive function by storing its results. function memoize(func, hasher) { var memoize = function(key) { var cache = memoize.cache; var address = '' + (hasher ? hasher.apply(this, arguments) : key); if (!has$1(cache, address)) cache[address] = func.apply(this, arguments); return cache[address]; }; memoize.cache = {}; return memoize; } // Delays a function for the given number of milliseconds, and then calls // it with the arguments supplied. var delay = restArguments(function(func, wait, args) { return setTimeout(function() { return func.apply(null, args); }, wait); }); // Defers a function, scheduling it to run after the current call stack has // cleared. var defer = partial(delay, _$1, 1); // Returns a function, that, when invoked, will only be triggered at most once // during a given window of time. Normally, the throttled function will run // as much as it can, without ever going more than once per `wait` duration; // but if you'd like to disable the execution on the leading edge, pass // `{leading: false}`. To disable execution on the trailing edge, ditto. function throttle(func, wait, options) { var timeout, context, args, result; var previous = 0; if (!options) options = {}; var later = function() { previous = options.leading === false ? 0 : now(); timeout = null; result = func.apply(context, args); if (!timeout) context = args = null; }; var throttled = function() { var _now = now(); if (!previous && options.leading === false) previous = _now; var remaining = wait - (_now - previous); context = this; args = arguments; if (remaining <= 0 \|\| remaining > wait) { if (timeout) { clearTimeout(timeout); timeout = null; } previous = _now; result = func.apply(context, args); if (!timeout) context = args = null; } else if (!timeout && options.trailing !== false) { timeout = setTimeout(later, remaining); } return result; }; throttled.cancel = function() { clearTimeout(timeout); previous = 0; timeout = context = args = null; }; return throttled; } // When a sequence of calls of the returned function ends, the argument // function is triggered. The end of a sequence is defined by the `wait` // parameter. If `immediate` is passed, the argument function will be // triggered at the beginning of the sequence instead of at the end. function debounce(func, wait, immediate) { var timeout, previous, args, result, context; var later = function() { var passed = now() - previous; if (wait > passed) { timeout = setTimeout(later, wait - passed); } else { timeout = null; if (!immediate) result = func.apply(context, args); // This check is needed because `func` can recursively invoke `debounced`. if (!timeout) args = context = null; } }; var debounced = restArguments(function(_args) { context = this; args = _args; previous = now(); if (!timeout) { timeout = setTimeout(later, wait); if (immediate) result = func.apply(context, args); } return result; }); debounced.cancel = function() { clearTimeout(timeout); timeout = args = context = null; }; return debounced; } // Returns the first function passed as an argument to the second, // allowing you to adjust arguments, run code before and after, and // conditionally execute the original function. function wrap(func, wrapper) { return partial(wrapper, func); } // Returns a negated version of the passed-in predicate. function negate(predicate) { return function() { return !predicate.apply(this, arguments); }; } // Returns a function that is the composition of a list of functions, each // consuming the return value of the function that follows. function compose() { var args = arguments; var start = args.length - 1; return function() { var i = start; var result = args[start].apply(this, arguments); while (i--) result = args[i].call(this, result); return result; }; } // Returns a function that will only be executed on and after the Nth call. function after(times, func) { return function() { if (--times < 1) { return func.apply(this, arguments); } }; } // Returns a function that will only be executed up to (but not including) the // Nth call. function before(times, func) { var memo; return function() { if (--times > 0) { memo = func.apply(this, arguments); } if (times <= 1) func = null; return memo; }; } // Returns a function that will be executed at most one time, no matter how // often you call it. Useful for lazy initialization. var once = partial(before, 2); // Returns the first key on an object that passes a truth test. function findKey(obj, predicate, context) { predicate = cb(predicate, context); var _keys = keys(obj), key; for (var i = 0, length = _keys.length; i < length; i++) { key = _keys[i]; if (predicate(obj[key], key, obj)) return key; } } // Internal function to generate `_.findIndex` and `_.findLastIndex`. function createPredicateIndexFinder(dir) { return function(array, predicate, context) { predicate = cb(predicate, context); var length = getLength(array); var index = dir > 0 ? 0 : length - 1; for (; index >= 0 && index < length; index += dir) { if (predicate(array[index], index, array)) return index; } return -1; }; } // Returns the first index on an array-like that passes a truth test. var findIndex = createPredicateIndexFinder(1); // Returns the last index on an array-like that passes a truth test. var findLastIndex = createPredicateIndexFinder(-1); // Use a comparator function to figure out the smallest index at which // an object should be inserted so as to maintain order. Uses binary search. function sortedIndex(array, obj, iteratee, context) { iteratee = cb(iteratee, context, 1); var value = iteratee(obj); var low = 0, high = getLength(array); while (low < high) { var mid = Math.floor((low + high) / 2); if (iteratee(array[mid]) < value) low = mid + 1; else high = mid; } return low; } // Internal function to generate the `_.indexOf` and `_.lastIndexOf` functions. function createIndexFinder(dir, predicateFind, sortedIndex) { return function(array, item, idx) { var i = 0, length = getLength(array); if (typeof idx == 'number') { if (dir > 0) { i = idx >= 0 ? idx : Math.max(idx + length, i); } else { length = idx >= 0 ? Math.min(idx + 1, length) : idx + length + 1; } } else if (sortedIndex && idx && length) { idx = sortedIndex(array, item); return array[idx] === item ? idx : -1; } if (item !== item) { idx = predicateFind(slice.call(array, i, length), isNaN$1); return idx >= 0 ? idx + i : -1; } for (idx = dir > 0 ? i : length - 1; idx >= 0 && idx < length; idx += dir) { if (array[idx] === item) return idx; } return -1; }; } // Return the position of the first occurrence of an item in an array, // or -1 if the item is not included in the array. // If the array is large and already in sort order, pass `true` // for isSorted to use binary search. var indexOf = createIndexFinder(1, findIndex, sortedIndex); // Return the position of the last occurrence of an item in an array, // or -1 if the item is not included in the array. var lastIndexOf = createIndexFinder(-1, findLastIndex); // Return the first value which passes a truth test. function find(obj, predicate, context) { var keyFinder = isArrayLike(obj) ? findIndex : findKey; var key = keyFinder(obj, predicate, context); if (key !== void 0 && key !== -1) return obj[key]; } // Convenience version of a common use case of `_.find`: getting the first // object containing specific `key:value` pairs. function findWhere(obj, attrs) { return find(obj, matcher(attrs)); } // The cornerstone for collection functions, an `each` // implementation, aka `forEach`. // Handles raw objects in addition to array-likes. Treats all // sparse array-likes as if they were dense. function each(obj, iteratee, context) { iteratee = optimizeCb(iteratee, context); var i, length; if (isArrayLike(obj)) { for (i = 0, length = obj.length; i < length; i++) { iteratee(obj[i], i, obj); } } else { var _keys = keys(obj); for (i = 0, length = _keys.length; i < length; i++) { iteratee(obj[_keys[i]], _keys[i], obj); } } return obj; } // Return the results of applying the iteratee to each element. function map(obj, iteratee, context) { iteratee = cb(iteratee, context); var _keys = !isArrayLike(obj) && keys(obj), length = (_keys \|\| obj).length, results = Array(length); for (var index = 0; index < length; index++) { var currentKey = _keys ? _keys[index] : index; results[index] = iteratee(obj[currentKey], currentKey, obj); } return results; } // Internal helper to create a reducing function, iterating left or right. function createReduce(dir) { // Wrap code that reassigns argument variables in a separate function than // the one that accesses `arguments.length` to avoid a perf hit. (#1991) var reducer = function(obj, iteratee, memo, initial) { var _keys = !isArrayLike(obj) && keys(obj), length = (_keys \|\| obj).length, index = dir > 0 ? 0 : length - 1; if (!initial) { memo = obj[_keys ? _keys[index] : index]; index += dir; } for (; index >= 0 && index < length; index += dir) { var currentKey = _keys ? _keys[index] : index; memo = iteratee(memo, obj[currentKey], currentKey, obj); } return memo; }; return function(obj, iteratee, memo, context) { var initial = arguments.length >= 3; return reducer(obj, optimizeCb(iteratee, context, 4), memo, initial); }; } // Reduce builds up a single result from a list of values, aka `inject`, // or `foldl`. var reduce = createReduce(1); // The right-associative version of reduce, also known as `foldr`. var reduceRight = createReduce(-1); // Return all the elements that pass a truth test. function filter(obj, predicate, context) { var results = []; predicate = cb(predicate, context); each(obj, function(value, index, list) { if (predicate(value, index, list)) results.push(value); }); return results; } // Return all the elements for which a truth test fails. function reject(obj, predicate, context) { return filter(obj, negate(cb(predicate)), context); } // Determine whether all of the elements pass a truth test. function every(obj, predicate, context) { predicate = cb(predicate, context); var _keys = !isArrayLike(obj) && keys(obj), length = (_keys \|\| obj).length; for (var index = 0; index < length; index++) { var currentKey = _keys ? _keys[index] : index; if (!predicate(obj[currentKey], currentKey, obj)) return false; } return true; } // Determine if at least one element in the object passes a truth test. function some(obj, predicate, context) { predicate = cb(predicate, context); var _keys = !isArrayLike(obj) && keys(obj), length = (_keys \|\| obj).length; for (var index = 0; index < length; index++) { var currentKey = _keys ? _keys[index] : index; if (predicate(obj[currentKey], currentKey, obj)) return true; } return false; } // Determine if the array or object contains a given item (using `===`). function contains(obj, item, fromIndex, guard) { if (!isArrayLike(obj)) obj = values(obj); if (typeof fromIndex != 'number' \|\| guard) fromIndex = 0; return indexOf(obj, item, fromIndex) >= 0; } // Invoke a method (with arguments) on every item in a collection. var invoke = restArguments(function(obj, path, args) { var contextPath, func; if (isFunction$1(path)) { func = path; } else { path = toPath(path); contextPath = path.slice(0, -1); path = path[path.length - 1]; } return map(obj, function(context) { var method = func; if (!method) { if (contextPath && contextPath.length) { context = deepGet(context, contextPath); } if (context == null) return void 0; method = context[path]; } return method == null ? method : method.apply(context, args); }); }); // Convenience version of a common use case of `_.map`: fetching a property. function pluck(obj, key) { return map(obj, property(key)); } // Convenience version of a common use case of `_.filter`: selecting only // objects containing specific `key:value` pairs. function where(obj, attrs) { return filter(obj, matcher(attrs)); } // Return the maximum element (or element-based computation). function max(obj, iteratee, context) { var result = -Infinity, lastComputed = -Infinity, value, computed; if (iteratee == null \|\| (typeof iteratee == 'number' && typeof obj[0] != 'object' && obj != null)) { obj = isArrayLike(obj) ? obj : values(obj); for (var i = 0, length = obj.length; i < length; i++) { value = obj[i]; if (value != null && value > result) { result = value; } } } else { iteratee = cb(iteratee, context); each(obj, function(v, index, list) { computed = iteratee(v, index, list); if (computed > lastComputed \|\| (computed === -Infinity && result === -Infinity)) { result = v; lastComputed = computed; } }); } return result; } // Return the minimum element (or element-based computation). function min(obj, iteratee, context) { var result = Infinity, lastComputed = Infinity, value, computed; if (iteratee == null \|\| (typeof iteratee == 'number' && typeof obj[0] != 'object' && obj != null)) { obj = isArrayLike(obj) ? obj : values(obj); for (var i = 0, length = obj.length; i < length; i++) { value = obj[i]; if (value != null && value < result) { result = value; } } } else { iteratee = cb(iteratee, context); each(obj, function(v, index, list) { computed = iteratee(v, index, list); if (computed < lastComputed \|\| (computed === Infinity && result === Infinity)) { result = v; lastComputed = computed; } }); } return result; } // Safely create a real, live array from anything iterable. var reStrSymbol = /[^\ud800-\udfff]\|[\ud800-\udbff][\udc00-\udfff]\|[\ud800-\udfff]/g; function toArray(obj) { if (!obj) return []; if (isArray(obj)) return slice.call(obj); if (isString(obj)) { // Keep surrogate pair characters together. return obj.match(reStrSymbol); } if (isArrayLike(obj)) return map(obj, identity); return values(obj); } // Sample n random values from a collection using the modern version of the // [Fisher-Yates shuffle](https://en.wikipedia.org/wiki/Fisher–Yates_shuffle). // If n is not specified, returns a single random element. // The internal `guard` argument allows it to work with `_.map`. function sample(obj, n, guard) { if (n == null \|\| guard) { if (!isArrayLike(obj)) obj = values(obj); return obj[random(obj.length - 1)]; } var sample = toArray(obj); var length = getLength(sample); n = Math.max(Math.min(n, length), 0); var last = length - 1; for (var index = 0; index < n; index++) { var rand = random(index, last); var temp = sample[index]; sample[index] = sample[rand]; sample[rand] = temp; } return sample.slice(0, n); } // Shuffle a collection. function shuffle(obj) { return sample(obj, Infinity); } // Sort the object's values by a criterion produced by an iteratee. function sortBy(obj, iteratee, context) { var index = 0; iteratee = cb(iteratee, context); return pluck(map(obj, function(value, key, list) { return { value: value, index: index++, criteria: iteratee(value, key, list) }; }).sort(function(left, right) { var a = left.criteria; var b = right.criteria; if (a !== b) { if (a > b \|\| a === void 0) return 1; if (a < b \|\| b === void 0) return -1; } return left.index - right.index; }), 'value'); } // An internal function used for aggregate "group by" operations. function group(behavior, partition) { return function(obj, iteratee, context) { var result = partition ? [[], []] : {}; iteratee = cb(iteratee, context); each(obj, function(value, index) { var key = iteratee(value, index, obj); behavior(result, value, key); }); return result; }; } // Groups the object's values by a criterion. Pass either a string attribute // to group by, or a function that returns the criterion. var groupBy = group(function(result, value, key) { if (has$1(result, key)) result[key].push(value); else result[key] = [value]; }); // Indexes the object's values by a criterion, similar to `_.groupBy`, but for // when you know that your index values will be unique. var indexBy = group(function(result, value, key) { result[key] = value; }); // Counts instances of an object that group by a certain criterion. Pass // either a string attribute to count by, or a function that returns the // criterion. var countBy = group(function(result, value, key) { if (has$1(result, key)) result[key]++; else result[key] = 1; }); // Split a collection into two arrays: one whose elements all pass the given // truth test, and one whose elements all do not pass the truth test. var partition = group(function(result, value, pass) { result[pass ? 0 : 1].push(value); }, true); // Return the number of elements in a collection. function size(obj) { if (obj == null) return 0; return isArrayLike(obj) ? obj.length : keys(obj).length; } // Internal `_.pick` helper function to determine whether `key` is an enumerable // property name of `obj`. function keyInObj(value, key, obj) { return key in obj; } // Return a copy of the object only containing the allowed properties. var pick = restArguments(function(obj, keys) { var result = {}, iteratee = keys[0]; if (obj == null) return result; if (isFunction$1(iteratee)) { if (keys.length > 1) iteratee = optimizeCb(iteratee, keys[1]); keys = allKeys(obj); } else { iteratee = keyInObj; keys = flatten$1(keys, false, false); obj = Object(obj); } for (var i = 0, length = keys.length; i < length; i++) { var key = keys[i]; var value = obj[key]; if (iteratee(value, key, obj)) result[key] = value; } return result; }); // Return a copy of the object without the disallowed properties. var omit = restArguments(function(obj, keys) { var iteratee = keys[0], context; if (isFunction$1(iteratee)) { iteratee = negate(iteratee); if (keys.length > 1) context = keys[1]; } else { keys = map(flatten$1(keys, false, false), String); iteratee = function(value, key) { return !contains(keys, key); }; } return pick(obj, iteratee, context); }); // Returns everything but the last entry of the array. Especially useful on // the arguments object. Passing n will return all the values in // the array, excluding the last N. function initial(array, n, guard) { return slice.call(array, 0, Math.max(0, array.length - (n == null \|\| guard ? 1 : n))); } // Get the first element of an array. Passing n will return the first N // values in the array. The guard check allows it to work with `_.map`. function first(array, n, guard) { if (array == null \|\| array.length < 1) return n == null \|\| guard ? void 0 : []; if (n == null \|\| guard) return array[0]; return initial(array, array.length - n); } // Returns everything but the first entry of the `array`. Especially useful on // the `arguments` object. Passing an n will return the rest N values in the // `array`. function rest(array, n, guard) { return slice.call(array, n == null \|\| guard ? 1 : n); } // Get the last element of an array. Passing n will return the last N // values in the array. function last(array, n, guard) { if (array == null \|\| array.length < 1) return n == null \|\| guard ? void 0 : []; if (n == null \|\| guard) return array[array.length - 1]; return rest(array, Math.max(0, array.length - n)); } // Trim out all falsy values from an array. function compact(array) { return filter(array, Boolean); } // Flatten out an array, either recursively (by default), or up to `depth`. // Passing `true` or `false` as `depth` means `1` or `Infinity`, respectively. function flatten(array, depth) { return flatten$1(array, depth, false); } // Take the difference between one array and a number of other arrays. // Only the elements present in just the first array will remain. var difference = restArguments(function(array, rest) { rest = flatten$1(rest, true, true); return filter(array, function(value){ return !contains(rest, value); }); }); // Return a version of the array that does not contain the specified value(s). var without = restArguments(function(array, otherArrays) { return difference(array, otherArrays); }); // Produce a duplicate-free version of the array. If the array has already // been sorted, you have the option of using a faster algorithm. // The faster algorithm will not work with an iteratee if the iteratee // is not a one-to-one function, so providing an iteratee will disable // the faster algorithm. function uniq(array, isSorted, iteratee, context) { if (!isBoolean(isSorted)) { context = iteratee; iteratee = isSorted; isSorted = false; } if (iteratee != null) iteratee = cb(iteratee, context); var result = []; var seen = []; for (var i = 0, length = getLength(array); i < length; i++) { var value = array[i], computed = iteratee ? iteratee(value, i, array) : value; if (isSorted && !iteratee) { if (!i \|\| seen !== computed) result.push(value); seen = computed; } else if (iteratee) { if (!contains(seen, computed)) { seen.push(computed); result.push(value); } } else if (!contains(result, value)) { result.push(value); } } return result; } // Produce an array that contains the union: each distinct element from all of // the passed-in arrays. var union = restArguments(function(arrays) { return uniq(flatten$1(arrays, true, true)); }); // Produce an array that contains every item shared between all the // passed-in arrays. function intersection(array) { var result = []; var argsLength = arguments.length; for (var i = 0, length = getLength(array); i < length; i++) { var item = array[i]; if (contains(result, item)) continue; var j; for (j = 1; j < argsLength; j++) { if (!contains(arguments[j], item)) break; } if (j === argsLength) result.push(item); } return result; } // Complement of zip. Unzip accepts an array of arrays and groups // each array's elements on shared indices. function unzip(array) { var length = (array && max(array, getLength).length) \|\| 0; var result = Array(length); for (var index = 0; index < length; index++) { result[index] = pluck(array, index); } return result; } // Zip together multiple lists into a single array -- elements that share // an index go together. var zip = restArguments(unzip); // Converts lists into objects. Pass either a single array of `[key, value]` // pairs, or two parallel arrays of the same length -- one of keys, and one of // the corresponding values. Passing by pairs is the reverse of `_.pairs`. function object(list, values) { var result = {}; for (var i = 0, length = getLength(list); i < length; i++) { if (values) { result[list[i]] = values[i]; } else { result[list[i][0]] = list[i][1]; } } return result; } // Generate an integer Array containing an arithmetic progression. A port of // the native Python `range()` function. See // [the Python documentation](https://docs.python.org/library/functions.html#range). function range(start, stop, step) { if (stop == null) { stop = start \|\| 0; start = 0; } if (!step) { step = stop < start ? -1 : 1; } var length = Math.max(Math.ceil((stop - start) / step), 0); var range = Array(length); for (var idx = 0; idx < length; idx++, start += step) { range[idx] = start; } return range; } // Chunk a single array into multiple arrays, each containing `count` or fewer // items. function chunk(array, count) { if (count == null \|\| count < 1) return []; var result = []; var i = 0, length = array.length; while (i < length) { result.push(slice.call(array, i, i += count)); } return result; } // Helper function to continue chaining intermediate results. function chainResult(instance, obj) { return instance._chain ? _$1(obj).chain() : obj; } // Add your own custom functions to the Underscore object. function mixin(obj) { each(functions(obj), function(name) { var func = _$1[name] = obj[name]; _$1.prototype[name] = function() { var args = [this._wrapped]; push.apply(args, arguments); return chainResult(this, func.apply(_$1, args)); }; }); return _$1; } // Add all mutator `Array` functions to the wrapper. each(['pop', 'push', 'reverse', 'shift', 'sort', 'splice', 'unshift'], function(name) { var method = ArrayProto[name]; _$1.prototype[name] = function() { var obj = this._wrapped; if (obj != null) { method.apply(obj, arguments); if ((name === 'shift' \|\| name === 'splice') && obj.length === 0) { delete obj[0]; } } return chainResult(this, obj); }; }); // Add all accessor `Array` functions to the wrapper. each(['concat', 'join', 'slice'], function(name) { var method = ArrayProto[name]; _$1.prototype[name] = function() { var obj = this._wrapped; if (obj != null) obj = method.apply(obj, arguments); return chainResult(this, obj); }; }); // Named Exports var allExports = { __proto__: null, VERSION: VERSION, restArguments: restArguments, isObject: isObject, isNull: isNull, isUndefined: isUndefined, isBoolean: isBoolean, isElement: isElement, isString: isString, isNumber: isNumber, isDate: isDate, isRegExp: isRegExp, isError: isError, isSymbol: isSymbol, isArrayBuffer: isArrayBuffer, isDataView: isDataView$1, isArray: isArray, isFunction: isFunction$1, isArguments: isArguments$1, isFinite: isFinite$1, isNaN: isNaN$1, isTypedArray: isTypedArray$1, isEmpty: isEmpty, isMatch: isMatch, isEqual: isEqual, isMap: isMap, isWeakMap: isWeakMap, isSet: isSet, isWeakSet: isWeakSet, keys: keys, allKeys: allKeys, values: values, pairs: pairs, invert: invert, functions: functions, methods: functions, extend: extend, extendOwn: extendOwn, assign: extendOwn, defaults: defaults, create: create, clone: clone, tap: tap, get: get, has: has, mapObject: mapObject, identity: identity, constant: constant, noop: noop, toPath: toPath$1, property: property, propertyOf: propertyOf, matcher: matcher, matches: matcher, times: times, random: random, now: now, escape: _escape, unescape: _unescape, templateSettings: templateSettings, template: template, result: result, uniqueId: uniqueId, chain: chain, iteratee: iteratee, partial: partial, bind: bind, bindAll: bindAll, memoize: memoize, delay: delay, defer: defer, throttle: throttle, debounce: debounce, wrap: wrap, negate: negate, compose: compose, after: after, before: before, once: once, findKey: findKey, findIndex: findIndex, findLastIndex: findLastIndex, sortedIndex: sortedIndex, indexOf: indexOf, lastIndexOf: lastIndexOf, find: find, detect: find, findWhere: findWhere, each: each, forEach: each, map: map, collect: map, reduce: reduce, foldl: reduce, inject: reduce, reduceRight: reduceRight, foldr: reduceRight, filter: filter, select: filter, reject: reject, every: every, all: every, some: some, any: some, contains: contains, includes: contains, include: contains, invoke: invoke, pluck: pluck, where: where, max: max, min: min, shuffle: shuffle, sample: sample, sortBy: sortBy, groupBy: groupBy, indexBy: indexBy, countBy: countBy, partition: partition, toArray: toArray, size: size, pick: pick, omit: omit, first: first, head: first, take: first, initial: initial, last: last, rest: rest, tail: rest, drop: rest, compact: compact, flatten: flatten, without: without, uniq: uniq, unique: uniq, union: union, intersection: intersection, difference: difference, unzip: unzip, transpose: unzip, zip: zip, object: object, range: range, chunk: chunk, mixin: mixin, 'default': _$1 }; // Default Export // Add all of the Underscore functions to the wrapper object. var _ = mixin(allExports); // Legacy Node.js API. _._ = _; return _; }))); Back

Edit File : underscore.js | Size : 67.12 KB

// Current version.
  var VERSION = '1.13.7';

// Establish the root object, `window` (`self`) in the browser, `global`
  // on the server, or `this` in some virtual machines. We use `self`
  // instead of `window` for `WebWorker` support.
  var root = (typeof self == 'object' && self.self === self && self) ||
            (typeof global == 'object' && global.global === global && global) ||
            Function('return this')() ||
            {};

// Save bytes in the minified (but not gzipped) version:
  var ArrayProto = Array.prototype, ObjProto = Object.prototype;
  var SymbolProto = typeof Symbol !== 'undefined' ? Symbol.prototype : null;

// Create quick reference variables for speed access to core prototypes.
  var push = ArrayProto.push,
      slice = ArrayProto.slice,
      toString = ObjProto.toString,
      hasOwnProperty = ObjProto.hasOwnProperty;

// Modern feature detection.
  var supportsArrayBuffer = typeof ArrayBuffer !== 'undefined',
      supportsDataView = typeof DataView !== 'undefined';

// All **ECMAScript 5+** native function implementations that we hope to use
  // are declared here.
  var nativeIsArray = Array.isArray,
      nativeKeys = Object.keys,
      nativeCreate = Object.create,
      nativeIsView = supportsArrayBuffer && ArrayBuffer.isView;

// Create references to these builtin functions because we override them.
  var _isNaN = isNaN,
      _isFinite = isFinite;

// Keys in IE < 9 that won't be iterated by `for key in ...` and thus missed.
  var hasEnumBug = !{toString: null}.propertyIsEnumerable('toString');
  var nonEnumerableProps = ['valueOf', 'isPrototypeOf', 'toString',
    'propertyIsEnumerable', 'hasOwnProperty', 'toLocaleString'];

// The largest integer that can be represented exactly.
  var MAX_ARRAY_INDEX = Math.pow(2, 53) - 1;

// Some functions take a variable number of arguments, or a few expected
  // arguments at the beginning and then a variable number of values to operate
  // on. This helper accumulates all remaining arguments past the function’s
  // argument length (or an explicit `startIndex`), into an array that becomes
  // the last argument. Similar to ES6’s "rest parameter".
  function restArguments(func, startIndex) {
    startIndex = startIndex == null ? func.length - 1 : +startIndex;
    return function() {
      var length = Math.max(arguments.length - startIndex, 0),
          rest = Array(length),
          index = 0;
      for (; index < length; index++) {
        rest[index] = arguments[index + startIndex];
      }
      switch (startIndex) {
        case 0: return func.call(this, rest);
        case 1: return func.call(this, arguments[0], rest);
        case 2: return func.call(this, arguments[0], arguments[1], rest);
      }
      var args = Array(startIndex + 1);
      for (index = 0; index < startIndex; index++) {
        args[index] = arguments[index];
      }
      args[startIndex] = rest;
      return func.apply(this, args);
    };
  }

// Is a given variable an object?
  function isObject(obj) {
    var type = typeof obj;
    return type === 'function' || (type === 'object' && !!obj);
  }

// Is a given value equal to null?
  function isNull(obj) {
    return obj === null;
  }

// Is a given variable undefined?
  function isUndefined(obj) {
    return obj === void 0;
  }

// Is a given value a boolean?
  function isBoolean(obj) {
    return obj === true || obj === false || toString.call(obj) === '[object Boolean]';
  }

// Is a given value a DOM element?
  function isElement(obj) {
    return !!(obj && obj.nodeType === 1);
  }

// Internal function for creating a `toString`-based type tester.
  function tagTester(name) {
    var tag = '[object ' + name + ']';
    return function(obj) {
      return toString.call(obj) === tag;
    };
  }

var isString = tagTester('String');

var isNumber = tagTester('Number');

var isDate = tagTester('Date');

var isRegExp = tagTester('RegExp');

var isError = tagTester('Error');

var isSymbol = tagTester('Symbol');

var isArrayBuffer = tagTester('ArrayBuffer');

var isFunction = tagTester('Function');

// Optimize `isFunction` if appropriate. Work around some `typeof` bugs in old
  // v8, IE 11 (#1621), Safari 8 (#1929), and PhantomJS (#2236).
  var nodelist = root.document && root.document.childNodes;
  if (typeof /./ != 'function' && typeof Int8Array != 'object' && typeof nodelist != 'function') {
    isFunction = function(obj) {
      return typeof obj == 'function' || false;
    };
  }

var isFunction$1 = isFunction;

var hasObjectTag = tagTester('Object');

// In IE 10 - Edge 13, `DataView` has string tag `'[object Object]'`.
  // In IE 11, the most common among them, this problem also applies to
  // `Map`, `WeakMap` and `Set`.
  // Also, there are cases where an application can override the native
  // `DataView` object, in cases like that we can't use the constructor
  // safely and should just rely on alternate `DataView` checks
  var hasDataViewBug = (
        supportsDataView && (!/\[native code\]/.test(String(DataView)) || hasObjectTag(new DataView(new ArrayBuffer(8))))
      ),
      isIE11 = (typeof Map !== 'undefined' && hasObjectTag(new Map));

var isDataView = tagTester('DataView');

// In IE 10 - Edge 13, we need a different heuristic
  // to determine whether an object is a `DataView`.
  // Also, in cases where the native `DataView` is
  // overridden we can't rely on the tag itself.
  function alternateIsDataView(obj) {
    return obj != null && isFunction$1(obj.getInt8) && isArrayBuffer(obj.buffer);
  }

var isDataView$1 = (hasDataViewBug ? alternateIsDataView : isDataView);

// Is a given value an array?
  // Delegates to ECMA5's native `Array.isArray`.
  var isArray = nativeIsArray || tagTester('Array');

// Internal function to check whether `key` is an own property name of `obj`.
  function has$1(obj, key) {
    return obj != null && hasOwnProperty.call(obj, key);
  }

var isArguments = tagTester('Arguments');

// Define a fallback version of the method in browsers (ahem, IE < 9), where
  // there isn't any inspectable "Arguments" type.
  (function() {
    if (!isArguments(arguments)) {
      isArguments = function(obj) {
        return has$1(obj, 'callee');
      };
    }
  }());

var isArguments$1 = isArguments;

// Is a given object a finite number?
  function isFinite$1(obj) {
    return !isSymbol(obj) && _isFinite(obj) && !isNaN(parseFloat(obj));
  }

// Is the given value `NaN`?
  function isNaN$1(obj) {
    return isNumber(obj) && _isNaN(obj);
  }

// Predicate-generating function. Often useful outside of Underscore.
  function constant(value) {
    return function() {
      return value;
    };
  }

// Common internal logic for `isArrayLike` and `isBufferLike`.
  function createSizePropertyCheck(getSizeProperty) {
    return function(collection) {
      var sizeProperty = getSizeProperty(collection);
      return typeof sizeProperty == 'number' && sizeProperty >= 0 && sizeProperty <= MAX_ARRAY_INDEX;
    }
  }

// Internal helper to generate a function to obtain property `key` from `obj`.
  function shallowProperty(key) {
    return function(obj) {
      return obj == null ? void 0 : obj[key];
    };
  }

// Internal helper to obtain the `byteLength` property of an object.
  var getByteLength = shallowProperty('byteLength');

// Internal helper to determine whether we should spend extensive checks against
  // `ArrayBuffer` et al.
  var isBufferLike = createSizePropertyCheck(getByteLength);

// Is a given value a typed array?
  var typedArrayPattern = /\[object ((I|Ui)nt(8|16|32)|Float(32|64)|Uint8Clamped|Big(I|Ui)nt64)Array\]/;
  function isTypedArray(obj) {
    // `ArrayBuffer.isView` is the most future-proof, so use it when available.
    // Otherwise, fall back on the above regular expression.
    return nativeIsView ? (nativeIsView(obj) && !isDataView$1(obj)) :
                  isBufferLike(obj) && typedArrayPattern.test(toString.call(obj));
  }

var isTypedArray$1 = supportsArrayBuffer ? isTypedArray : constant(false);

// Internal helper to obtain the `length` property of an object.
  var getLength = shallowProperty('length');

// Internal helper to create a simple lookup structure.
  // `collectNonEnumProps` used to depend on `_.contains`, but this led to
  // circular imports. `emulatedSet` is a one-off solution that only works for
  // arrays of strings.
  function emulatedSet(keys) {
    var hash = {};
    for (var l = keys.length, i = 0; i < l; ++i) hash[keys[i]] = true;
    return {
      contains: function(key) { return hash[key] === true; },
      push: function(key) {
        hash[key] = true;
        return keys.push(key);
      }
    };
  }

// Internal helper. Checks `keys` for the presence of keys in IE < 9 that won't
  // be iterated by `for key in ...` and thus missed. Extends `keys` in place if
  // needed.
  function collectNonEnumProps(obj, keys) {
    keys = emulatedSet(keys);
    var nonEnumIdx = nonEnumerableProps.length;
    var constructor = obj.constructor;
    var proto = (isFunction$1(constructor) && constructor.prototype) || ObjProto;

// Constructor is a special case.
    var prop = 'constructor';
    if (has$1(obj, prop) && !keys.contains(prop)) keys.push(prop);

while (nonEnumIdx--) {
      prop = nonEnumerableProps[nonEnumIdx];
      if (prop in obj && obj[prop] !== proto[prop] && !keys.contains(prop)) {
        keys.push(prop);
      }
    }
  }

// Retrieve the names of an object's own properties.
  // Delegates to **ECMAScript 5**'s native `Object.keys`.
  function keys(obj) {
    if (!isObject(obj)) return [];
    if (nativeKeys) return nativeKeys(obj);
    var keys = [];
    for (var key in obj) if (has$1(obj, key)) keys.push(key);
    // Ahem, IE < 9.
    if (hasEnumBug) collectNonEnumProps(obj, keys);
    return keys;
  }

// Is a given array, string, or object empty?
  // An "empty" object has no enumerable own-properties.
  function isEmpty(obj) {
    if (obj == null) return true;
    // Skip the more expensive `toString`-based type checks if `obj` has no
    // `.length`.
    var length = getLength(obj);
    if (typeof length == 'number' && (
      isArray(obj) || isString(obj) || isArguments$1(obj)
    )) return length === 0;
    return getLength(keys(obj)) === 0;
  }

// Returns whether an object has a given set of `key:value` pairs.
  function isMatch(object, attrs) {
    var _keys = keys(attrs), length = _keys.length;
    if (object == null) return !length;
    var obj = Object(object);
    for (var i = 0; i < length; i++) {
      var key = _keys[i];
      if (attrs[key] !== obj[key] || !(key in obj)) return false;
    }
    return true;
  }

// If Underscore is called as a function, it returns a wrapped object that can
  // be used OO-style. This wrapper holds altered versions of all functions added
  // through `_.mixin`. Wrapped objects may be chained.
  function _$1(obj) {
    if (obj instanceof _$1) return obj;
    if (!(this instanceof _$1)) return new _$1(obj);
    this._wrapped = obj;
  }

_$1.VERSION = VERSION;

// Extracts the result from a wrapped and chained object.
  _$1.prototype.value = function() {
    return this._wrapped;
  };

// Provide unwrapping proxies for some methods used in engine operations
  // such as arithmetic and JSON stringification.
  _$1.prototype.valueOf = _$1.prototype.toJSON = _$1.prototype.value;

_$1.prototype.toString = function() {
    return String(this._wrapped);
  };

// Internal function to wrap or shallow-copy an ArrayBuffer,
  // typed array or DataView to a new view, reusing the buffer.
  function toBufferView(bufferSource) {
    return new Uint8Array(
      bufferSource.buffer || bufferSource,
      bufferSource.byteOffset || 0,
      getByteLength(bufferSource)
    );
  }

// We use this string twice, so give it a name for minification.
  var tagDataView = '[object DataView]';

// Internal recursive comparison function for `_.isEqual`.
  function eq(a, b, aStack, bStack) {
    // Identical objects are equal. `0 === -0`, but they aren't identical.
    // See the [Harmony `egal` proposal](https://wiki.ecmascript.org/doku.php?id=harmony:egal).
    if (a === b) return a !== 0 || 1 / a === 1 / b;
    // `null` or `undefined` only equal to itself (strict comparison).
    if (a == null || b == null) return false;
    // `NaN`s are equivalent, but non-reflexive.
    if (a !== a) return b !== b;
    // Exhaust primitive checks
    var type = typeof a;
    if (type !== 'function' && type !== 'object' && typeof b != 'object') return false;
    return deepEq(a, b, aStack, bStack);
  }

// Internal recursive comparison function for `_.isEqual`.
  function deepEq(a, b, aStack, bStack) {
    // Unwrap any wrapped objects.
    if (a instanceof _$1) a = a._wrapped;
    if (b instanceof _$1) b = b._wrapped;
    // Compare `[[Class]]` names.
    var className = toString.call(a);
    if (className !== toString.call(b)) return false;
    // Work around a bug in IE 10 - Edge 13.
    if (hasDataViewBug && className == '[object Object]' && isDataView$1(a)) {
      if (!isDataView$1(b)) return false;
      className = tagDataView;
    }
    switch (className) {
      // These types are compared by value.
      case '[object RegExp]':
        // RegExps are coerced to strings for comparison (Note: '' + /a/i === '/a/i')
      case '[object String]':
        // Primitives and their corresponding object wrappers are equivalent; thus, `"5"` is
        // equivalent to `new String("5")`.
        return '' + a === '' + b;
      case '[object Number]':
        // `NaN`s are equivalent, but non-reflexive.
        // Object(NaN) is equivalent to NaN.
        if (+a !== +a) return +b !== +b;
        // An `egal` comparison is performed for other numeric values.
        return +a === 0 ? 1 / +a === 1 / b : +a === +b;
      case '[object Date]':
      case '[object Boolean]':
        // Coerce dates and booleans to numeric primitive values. Dates are compared by their
        // millisecond representations. Note that invalid dates with millisecond representations
        // of `NaN` are not equivalent.
        return +a === +b;
      case '[object Symbol]':
        return SymbolProto.valueOf.call(a) === SymbolProto.valueOf.call(b);
      case '[object ArrayBuffer]':
      case tagDataView:
        // Coerce to typed array so we can fall through.
        return deepEq(toBufferView(a), toBufferView(b), aStack, bStack);
    }

var areArrays = className === '[object Array]';
    if (!areArrays && isTypedArray$1(a)) {
        var byteLength = getByteLength(a);
        if (byteLength !== getByteLength(b)) return false;
        if (a.buffer === b.buffer && a.byteOffset === b.byteOffset) return true;
        areArrays = true;
    }
    if (!areArrays) {
      if (typeof a != 'object' || typeof b != 'object') return false;

// Objects with different constructors are not equivalent, but `Object`s or `Array`s
      // from different frames are.
      var aCtor = a.constructor, bCtor = b.constructor;
      if (aCtor !== bCtor && !(isFunction$1(aCtor) && aCtor instanceof aCtor &&
                               isFunction$1(bCtor) && bCtor instanceof bCtor)
                          && ('constructor' in a && 'constructor' in b)) {
        return false;
      }
    }
    // Assume equality for cyclic structures. The algorithm for detecting cyclic
    // structures is adapted from ES 5.1 section 15.12.3, abstract operation `JO`.

// Initializing stack of traversed objects.
    // It's done here since we only need them for objects and arrays comparison.
    aStack = aStack || [];
    bStack = bStack || [];
    var length = aStack.length;
    while (length--) {
      // Linear search. Performance is inversely proportional to the number of
      // unique nested structures.
      if (aStack[length] === a) return bStack[length] === b;
    }

// Add the first object to the stack of traversed objects.
    aStack.push(a);
    bStack.push(b);

// Recursively compare objects and arrays.
    if (areArrays) {
      // Compare array lengths to determine if a deep comparison is necessary.
      length = a.length;
      if (length !== b.length) return false;
      // Deep compare the contents, ignoring non-numeric properties.
      while (length--) {
        if (!eq(a[length], b[length], aStack, bStack)) return false;
      }
    } else {
      // Deep compare objects.
      var _keys = keys(a), key;
      length = _keys.length;
      // Ensure that both objects contain the same number of properties before comparing deep equality.
      if (keys(b).length !== length) return false;
      while (length--) {
        // Deep compare each member
        key = _keys[length];
        if (!(has$1(b, key) && eq(a[key], b[key], aStack, bStack))) return false;
      }
    }
    // Remove the first object from the stack of traversed objects.
    aStack.pop();
    bStack.pop();
    return true;
  }

// Perform a deep comparison to check if two objects are equal.
  function isEqual(a, b) {
    return eq(a, b);
  }

// Retrieve all the enumerable property names of an object.
  function allKeys(obj) {
    if (!isObject(obj)) return [];
    var keys = [];
    for (var key in obj) keys.push(key);
    // Ahem, IE < 9.
    if (hasEnumBug) collectNonEnumProps(obj, keys);
    return keys;
  }

// Since the regular `Object.prototype.toString` type tests don't work for
  // some types in IE 11, we use a fingerprinting heuristic instead, based
  // on the methods. It's not great, but it's the best we got.
  // The fingerprint method lists are defined below.
  function ie11fingerprint(methods) {
    var length = getLength(methods);
    return function(obj) {
      if (obj == null) return false;
      // `Map`, `WeakMap` and `Set` have no enumerable keys.
      var keys = allKeys(obj);
      if (getLength(keys)) return false;
      for (var i = 0; i < length; i++) {
        if (!isFunction$1(obj[methods[i]])) return false;
      }
      // If we are testing against `WeakMap`, we need to ensure that
      // `obj` doesn't have a `forEach` method in order to distinguish
      // it from a regular `Map`.
      return methods !== weakMapMethods || !isFunction$1(obj[forEachName]);
    };
  }

// In the interest of compact minification, we write
  // each string in the fingerprints only once.
  var forEachName = 'forEach',
      hasName = 'has',
      commonInit = ['clear', 'delete'],
      mapTail = ['get', hasName, 'set'];

// `Map`, `WeakMap` and `Set` each have slightly different
  // combinations of the above sublists.
  var mapMethods = commonInit.concat(forEachName, mapTail),
      weakMapMethods = commonInit.concat(mapTail),
      setMethods = ['add'].concat(commonInit, forEachName, hasName);

var isMap = isIE11 ? ie11fingerprint(mapMethods) : tagTester('Map');

var isWeakMap = isIE11 ? ie11fingerprint(weakMapMethods) : tagTester('WeakMap');

var isSet = isIE11 ? ie11fingerprint(setMethods) : tagTester('Set');

var isWeakSet = tagTester('WeakSet');

// Retrieve the values of an object's properties.
  function values(obj) {
    var _keys = keys(obj);
    var length = _keys.length;
    var values = Array(length);
    for (var i = 0; i < length; i++) {
      values[i] = obj[_keys[i]];
    }
    return values;
  }

// Convert an object into a list of `[key, value]` pairs.
  // The opposite of `_.object` with one argument.
  function pairs(obj) {
    var _keys = keys(obj);
    var length = _keys.length;
    var pairs = Array(length);
    for (var i = 0; i < length; i++) {
      pairs[i] = [_keys[i], obj[_keys[i]]];
    }
    return pairs;
  }

// Invert the keys and values of an object. The values must be serializable.
  function invert(obj) {
    var result = {};
    var _keys = keys(obj);
    for (var i = 0, length = _keys.length; i < length; i++) {
      result[obj[_keys[i]]] = _keys[i];
    }
    return result;
  }

// Return a sorted list of the function names available on the object.
  function functions(obj) {
    var names = [];
    for (var key in obj) {
      if (isFunction$1(obj[key])) names.push(key);
    }
    return names.sort();
  }

// An internal function for creating assigner functions.
  function createAssigner(keysFunc, defaults) {
    return function(obj) {
      var length = arguments.length;
      if (defaults) obj = Object(obj);
      if (length < 2 || obj == null) return obj;
      for (var index = 1; index < length; index++) {
        var source = arguments[index],
            keys = keysFunc(source),
            l = keys.length;
        for (var i = 0; i < l; i++) {
          var key = keys[i];
          if (!defaults || obj[key] === void 0) obj[key] = source[key];
        }
      }
      return obj;
    };
  }

// Extend a given object with all the properties in passed-in object(s).
  var extend = createAssigner(allKeys);

// Assigns a given object with all the own properties in the passed-in
  // object(s).
  // (https://developer.mozilla.org/docs/Web/JavaScript/Reference/Global_Objects/Object/assign)
  var extendOwn = createAssigner(keys);

// Fill in a given object with default properties.
  var defaults = createAssigner(allKeys, true);

// Create a naked function reference for surrogate-prototype-swapping.
  function ctor() {
    return function(){};
  }

// An internal function for creating a new object that inherits from another.
  function baseCreate(prototype) {
    if (!isObject(prototype)) return {};
    if (nativeCreate) return nativeCreate(prototype);
    var Ctor = ctor();
    Ctor.prototype = prototype;
    var result = new Ctor;
    Ctor.prototype = null;
    return result;
  }

// Creates an object that inherits from the given prototype object.
  // If additional properties are provided then they will be added to the
  // created object.
  function create(prototype, props) {
    var result = baseCreate(prototype);
    if (props) extendOwn(result, props);
    return result;
  }

// Create a (shallow-cloned) duplicate of an object.
  function clone(obj) {
    if (!isObject(obj)) return obj;
    return isArray(obj) ? obj.slice() : extend({}, obj);
  }

// Invokes `interceptor` with the `obj` and then returns `obj`.
  // The primary purpose of this method is to "tap into" a method chain, in
  // order to perform operations on intermediate results within the chain.
  function tap(obj, interceptor) {
    interceptor(obj);
    return obj;
  }

// Normalize a (deep) property `path` to array.
  // Like `_.iteratee`, this function can be customized.
  function toPath$1(path) {
    return isArray(path) ? path : [path];
  }
  _$1.toPath = toPath$1;

// Internal wrapper for `_.toPath` to enable minification.
  // Similar to `cb` for `_.iteratee`.
  function toPath(path) {
    return _$1.toPath(path);
  }

// Internal function to obtain a nested property in `obj` along `path`.
  function deepGet(obj, path) {
    var length = path.length;
    for (var i = 0; i < length; i++) {
      if (obj == null) return void 0;
      obj = obj[path[i]];
    }
    return length ? obj : void 0;
  }

// Get the value of the (deep) property on `path` from `object`.
  // If any property in `path` does not exist or if the value is
  // `undefined`, return `defaultValue` instead.
  // The `path` is normalized through `_.toPath`.
  function get(object, path, defaultValue) {
    var value = deepGet(object, toPath(path));
    return isUndefined(value) ? defaultValue : value;
  }

// Shortcut function for checking if an object has a given property directly on
  // itself (in other words, not on a prototype). Unlike the internal `has`
  // function, this public version can also traverse nested properties.
  function has(obj, path) {
    path = toPath(path);
    var length = path.length;
    for (var i = 0; i < length; i++) {
      var key = path[i];
      if (!has$1(obj, key)) return false;
      obj = obj[key];
    }
    return !!length;
  }

// Keep the identity function around for default iteratees.
  function identity(value) {
    return value;
  }

// Returns a predicate for checking whether an object has a given set of
  // `key:value` pairs.
  function matcher(attrs) {
    attrs = extendOwn({}, attrs);
    return function(obj) {
      return isMatch(obj, attrs);
    };
  }

// Creates a function that, when passed an object, will traverse that object’s
  // properties down the given `path`, specified as an array of keys or indices.
  function property(path) {
    path = toPath(path);
    return function(obj) {
      return deepGet(obj, path);
    };
  }

// Internal function that returns an efficient (for current engines) version
  // of the passed-in callback, to be repeatedly applied in other Underscore
  // functions.
  function optimizeCb(func, context, argCount) {
    if (context === void 0) return func;
    switch (argCount == null ? 3 : argCount) {
      case 1: return function(value) {
        return func.call(context, value);
      };
      // The 2-argument case is omitted because we’re not using it.
      case 3: return function(value, index, collection) {
        return func.call(context, value, index, collection);
      };
      case 4: return function(accumulator, value, index, collection) {
        return func.call(context, accumulator, value, index, collection);
      };
    }
    return function() {
      return func.apply(context, arguments);
    };
  }

// An internal function to generate callbacks that can be applied to each
  // element in a collection, returning the desired result — either `_.identity`,
  // an arbitrary callback, a property matcher, or a property accessor.
  function baseIteratee(value, context, argCount) {
    if (value == null) return identity;
    if (isFunction$1(value)) return optimizeCb(value, context, argCount);
    if (isObject(value) && !isArray(value)) return matcher(value);
    return property(value);
  }

// External wrapper for our callback generator. Users may customize
  // `_.iteratee` if they want additional predicate/iteratee shorthand styles.
  // This abstraction hides the internal-only `argCount` argument.
  function iteratee(value, context) {
    return baseIteratee(value, context, Infinity);
  }
  _$1.iteratee = iteratee;

// The function we call internally to generate a callback. It invokes
  // `_.iteratee` if overridden, otherwise `baseIteratee`.
  function cb(value, context, argCount) {
    if (_$1.iteratee !== iteratee) return _$1.iteratee(value, context);
    return baseIteratee(value, context, argCount);
  }

// Returns the results of applying the `iteratee` to each element of `obj`.
  // In contrast to `_.map` it returns an object.
  function mapObject(obj, iteratee, context) {
    iteratee = cb(iteratee, context);
    var _keys = keys(obj),
        length = _keys.length,
        results = {};
    for (var index = 0; index < length; index++) {
      var currentKey = _keys[index];
      results[currentKey] = iteratee(obj[currentKey], currentKey, obj);
    }
    return results;
  }

// Predicate-generating function. Often useful outside of Underscore.
  function noop(){}

// Generates a function for a given object that returns a given property.
  function propertyOf(obj) {
    if (obj == null) return noop;
    return function(path) {
      return get(obj, path);
    };
  }

// Run a function **n** times.
  function times(n, iteratee, context) {
    var accum = Array(Math.max(0, n));
    iteratee = optimizeCb(iteratee, context, 1);
    for (var i = 0; i < n; i++) accum[i] = iteratee(i);
    return accum;
  }

// Return a random integer between `min` and `max` (inclusive).
  function random(min, max) {
    if (max == null) {
      max = min;
      min = 0;
    }
    return min + Math.floor(Math.random() * (max - min + 1));
  }

// A (possibly faster) way to get the current timestamp as an integer.
  var now = Date.now || function() {
    return new Date().getTime();
  };

// Internal helper to generate functions for escaping and unescaping strings
  // to/from HTML interpolation.
  function createEscaper(map) {
    var escaper = function(match) {
      return map[match];
    };
    // Regexes for identifying a key that needs to be escaped.
    var source = '(?:' + keys(map).join('|') + ')';
    var testRegexp = RegExp(source);
    var replaceRegexp = RegExp(source, 'g');
    return function(string) {
      string = string == null ? '' : '' + string;
      return testRegexp.test(string) ? string.replace(replaceRegexp, escaper) : string;
    };
  }

// Internal list of HTML entities for escaping.
  var escapeMap = {
    '&': '&amp;',
    '<': '&lt;',
    '>': '&gt;',
    '"': '&quot;',
    "'": '&#x27;',
    '`': '&#x60;'
  };

// Function for escaping strings to HTML interpolation.
  var _escape = createEscaper(escapeMap);

// Internal list of HTML entities for unescaping.
  var unescapeMap = invert(escapeMap);

// Function for unescaping strings from HTML interpolation.
  var _unescape = createEscaper(unescapeMap);

// By default, Underscore uses ERB-style template delimiters. Change the
  // following template settings to use alternative delimiters.
  var templateSettings = _$1.templateSettings = {
    evaluate: /<%([\s\S]+?)%>/g,
    interpolate: /<%=([\s\S]+?)%>/g,
    escape: /<%-([\s\S]+?)%>/g
  };

// When customizing `_.templateSettings`, if you don't want to define an
  // interpolation, evaluation or escaping regex, we need one that is
  // guaranteed not to match.
  var noMatch = /(.)^/;

// Certain characters need to be escaped so that they can be put into a
  // string literal.
  var escapes = {
    "'": "'",
    '\\': '\\',
    '\r': 'r',
    '\n': 'n',
    '\u2028': 'u2028',
    '\u2029': 'u2029'
  };

var escapeRegExp = /\\|'|\r|\n|\u2028|\u2029/g;

function escapeChar(match) {
    return '\\' + escapes[match];
  }

// In order to prevent third-party code injection through
  // `_.templateSettings.variable`, we test it against the following regular
  // expression. It is intentionally a bit more liberal than just matching valid
  // identifiers, but still prevents possible loopholes through defaults or
  // destructuring assignment.
  var bareIdentifier = /^\s*(\w|\$)+\s*$/;

// JavaScript micro-templating, similar to John Resig's implementation.
  // Underscore templating handles arbitrary delimiters, preserves whitespace,
  // and correctly escapes quotes within interpolated code.
  // NB: `oldSettings` only exists for backwards compatibility.
  function template(text, settings, oldSettings) {
    if (!settings && oldSettings) settings = oldSettings;
    settings = defaults({}, settings, _$1.templateSettings);

// Combine delimiters into one regular expression via alternation.
    var matcher = RegExp([
      (settings.escape || noMatch).source,
      (settings.interpolate || noMatch).source,
      (settings.evaluate || noMatch).source
    ].join('|') + '|$', 'g');

// Compile the template source, escaping string literals appropriately.
    var index = 0;
    var source = "__p+='";
    text.replace(matcher, function(match, escape, interpolate, evaluate, offset) {
      source += text.slice(index, offset).replace(escapeRegExp, escapeChar);
      index = offset + match.length;

if (escape) {
        source += "'+\n((__t=(" + escape + "))==null?'':_.escape(__t))+\n'";
      } else if (interpolate) {
        source += "'+\n((__t=(" + interpolate + "))==null?'':__t)+\n'";
      } else if (evaluate) {
        source += "';\n" + evaluate + "\n__p+='";
      }

// Adobe VMs need the match returned to produce the correct offset.
      return match;
    });
    source += "';\n";

source = "var __t,__p='',__j=Array.prototype.join," +
      "print=function(){__p+=__j.call(arguments,'');};\n" +
      source + 'return __p;\n';

var render;
    try {
      render = new Function(argument, '_', source);
    } catch (e) {
      e.source = source;
      throw e;
    }

var template = function(data) {
      return render.call(this, data, _$1);
    };

// Provide the compiled source as a convenience for precompilation.
    template.source = 'function(' + argument + '){\n' + source + '}';

return template;
  }

// Traverses the children of `obj` along `path`. If a child is a function, it
  // is invoked with its parent as context. Returns the value of the final
  // child, or `fallback` if any child is undefined.
  function result(obj, path, fallback) {
    path = toPath(path);
    var length = path.length;
    if (!length) {
      return isFunction$1(fallback) ? fallback.call(obj) : fallback;
    }
    for (var i = 0; i < length; i++) {
      var prop = obj == null ? void 0 : obj[path[i]];
      if (prop === void 0) {
        prop = fallback;
        i = length; // Ensure we don't continue iterating.
      }
      obj = isFunction$1(prop) ? prop.call(obj) : prop;
    }
    return obj;
  }

// Generate a unique integer id (unique within the entire client session).
  // Useful for temporary DOM ids.
  var idCounter = 0;
  function uniqueId(prefix) {
    var id = ++idCounter + '';
    return prefix ? prefix + id : id;
  }

// Start chaining a wrapped Underscore object.
  function chain(obj) {
    var instance = _$1(obj);
    instance._chain = true;
    return instance;
  }

// Internal function to execute `sourceFunc` bound to `context` with optional
  // `args`. Determines whether to execute a function as a constructor or as a
  // normal function.
  function executeBound(sourceFunc, boundFunc, context, callingContext, args) {
    if (!(callingContext instanceof boundFunc)) return sourceFunc.apply(context, args);
    var self = baseCreate(sourceFunc.prototype);
    var result = sourceFunc.apply(self, args);
    if (isObject(result)) return result;
    return self;
  }

// Partially apply a function by creating a version that has had some of its
  // arguments pre-filled, without changing its dynamic `this` context. `_` acts
  // as a placeholder by default, allowing any combination of arguments to be
  // pre-filled. Set `_.partial.placeholder` for a custom placeholder argument.
  var partial = restArguments(function(func, boundArgs) {
    var placeholder = partial.placeholder;
    var bound = function() {
      var position = 0, length = boundArgs.length;
      var args = Array(length);
      for (var i = 0; i < length; i++) {
        args[i] = boundArgs[i] === placeholder ? arguments[position++] : boundArgs[i];
      }
      while (position < arguments.length) args.push(arguments[position++]);
      return executeBound(func, bound, this, this, args);
    };
    return bound;
  });

partial.placeholder = _$1;

// Create a function bound to a given object (assigning `this`, and arguments,
  // optionally).
  var bind = restArguments(function(func, context, args) {
    if (!isFunction$1(func)) throw new TypeError('Bind must be called on a function');
    var bound = restArguments(function(callArgs) {
      return executeBound(func, bound, context, this, args.concat(callArgs));
    });
    return bound;
  });

// Internal helper for collection methods to determine whether a collection
  // should be iterated as an array or as an object.
  // Related: https://people.mozilla.org/~jorendorff/es6-draft.html#sec-tolength
  // Avoids a very nasty iOS 8 JIT bug on ARM-64. #2094
  var isArrayLike = createSizePropertyCheck(getLength);

// Internal implementation of a recursive `flatten` function.
  function flatten$1(input, depth, strict, output) {
    output = output || [];
    if (!depth && depth !== 0) {
      depth = Infinity;
    } else if (depth <= 0) {
      return output.concat(input);
    }
    var idx = output.length;
    for (var i = 0, length = getLength(input); i < length; i++) {
      var value = input[i];
      if (isArrayLike(value) && (isArray(value) || isArguments$1(value))) {
        // Flatten current level of array or arguments object.
        if (depth > 1) {
          flatten$1(value, depth - 1, strict, output);
          idx = output.length;
        } else {
          var j = 0, len = value.length;
          while (j < len) output[idx++] = value[j++];
        }
      } else if (!strict) {
        output[idx++] = value;
      }
    }
    return output;
  }

// Bind a number of an object's methods to that object. Remaining arguments
  // are the method names to be bound. Useful for ensuring that all callbacks
  // defined on an object belong to it.
  var bindAll = restArguments(function(obj, keys) {
    keys = flatten$1(keys, false, false);
    var index = keys.length;
    if (index < 1) throw new Error('bindAll must be passed function names');
    while (index--) {
      var key = keys[index];
      obj[key] = bind(obj[key], obj);
    }
    return obj;
  });

// Memoize an expensive function by storing its results.
  function memoize(func, hasher) {
    var memoize = function(key) {
      var cache = memoize.cache;
      var address = '' + (hasher ? hasher.apply(this, arguments) : key);
      if (!has$1(cache, address)) cache[address] = func.apply(this, arguments);
      return cache[address];
    };
    memoize.cache = {};
    return memoize;
  }

// Delays a function for the given number of milliseconds, and then calls
  // it with the arguments supplied.
  var delay = restArguments(function(func, wait, args) {
    return setTimeout(function() {
      return func.apply(null, args);
    }, wait);
  });

// Defers a function, scheduling it to run after the current call stack has
  // cleared.
  var defer = partial(delay, _$1, 1);

// Returns a function, that, when invoked, will only be triggered at most once
  // during a given window of time. Normally, the throttled function will run
  // as much as it can, without ever going more than once per `wait` duration;
  // but if you'd like to disable the execution on the leading edge, pass
  // `{leading: false}`. To disable execution on the trailing edge, ditto.
  function throttle(func, wait, options) {
    var timeout, context, args, result;
    var previous = 0;
    if (!options) options = {};

var later = function() {
      previous = options.leading === false ? 0 : now();
      timeout = null;
      result = func.apply(context, args);
      if (!timeout) context = args = null;
    };

throttled.cancel = function() {
      clearTimeout(timeout);
      previous = 0;
      timeout = context = args = null;
    };

return throttled;
  }

// When a sequence of calls of the returned function ends, the argument
  // function is triggered. The end of a sequence is defined by the `wait`
  // parameter. If `immediate` is passed, the argument function will be
  // triggered at the beginning of the sequence instead of at the end.
  function debounce(func, wait, immediate) {
    var timeout, previous, args, result, context;

var debounced = restArguments(function(_args) {
      context = this;
      args = _args;
      previous = now();
      if (!timeout) {
        timeout = setTimeout(later, wait);
        if (immediate) result = func.apply(context, args);
      }
      return result;
    });

debounced.cancel = function() {
      clearTimeout(timeout);
      timeout = args = context = null;
    };

return debounced;
  }

// Returns the first function passed as an argument to the second,
  // allowing you to adjust arguments, run code before and after, and
  // conditionally execute the original function.
  function wrap(func, wrapper) {
    return partial(wrapper, func);
  }

// Returns a negated version of the passed-in predicate.
  function negate(predicate) {
    return function() {
      return !predicate.apply(this, arguments);
    };
  }

// Returns a function that is the composition of a list of functions, each
  // consuming the return value of the function that follows.
  function compose() {
    var args = arguments;
    var start = args.length - 1;
    return function() {
      var i = start;
      var result = args[start].apply(this, arguments);
      while (i--) result = args[i].call(this, result);
      return result;
    };
  }

// Returns a function that will only be executed on and after the Nth call.
  function after(times, func) {
    return function() {
      if (--times < 1) {
        return func.apply(this, arguments);
      }
    };
  }

// Returns a function that will only be executed up to (but not including) the
  // Nth call.
  function before(times, func) {
    var memo;
    return function() {
      if (--times > 0) {
        memo = func.apply(this, arguments);
      }
      if (times <= 1) func = null;
      return memo;
    };
  }

// Returns a function that will be executed at most one time, no matter how
  // often you call it. Useful for lazy initialization.
  var once = partial(before, 2);

// Returns the first key on an object that passes a truth test.
  function findKey(obj, predicate, context) {
    predicate = cb(predicate, context);
    var _keys = keys(obj), key;
    for (var i = 0, length = _keys.length; i < length; i++) {
      key = _keys[i];
      if (predicate(obj[key], key, obj)) return key;
    }
  }

// Internal function to generate `_.findIndex` and `_.findLastIndex`.
  function createPredicateIndexFinder(dir) {
    return function(array, predicate, context) {
      predicate = cb(predicate, context);
      var length = getLength(array);
      var index = dir > 0 ? 0 : length - 1;
      for (; index >= 0 && index < length; index += dir) {
        if (predicate(array[index], index, array)) return index;
      }
      return -1;
    };
  }

// Returns the first index on an array-like that passes a truth test.
  var findIndex = createPredicateIndexFinder(1);

// Returns the last index on an array-like that passes a truth test.
  var findLastIndex = createPredicateIndexFinder(-1);

// Use a comparator function to figure out the smallest index at which
  // an object should be inserted so as to maintain order. Uses binary search.
  function sortedIndex(array, obj, iteratee, context) {
    iteratee = cb(iteratee, context, 1);
    var value = iteratee(obj);
    var low = 0, high = getLength(array);
    while (low < high) {
      var mid = Math.floor((low + high) / 2);
      if (iteratee(array[mid]) < value) low = mid + 1; else high = mid;
    }
    return low;
  }

// Internal function to generate the `_.indexOf` and `_.lastIndexOf` functions.
  function createIndexFinder(dir, predicateFind, sortedIndex) {
    return function(array, item, idx) {
      var i = 0, length = getLength(array);
      if (typeof idx == 'number') {
        if (dir > 0) {
          i = idx >= 0 ? idx : Math.max(idx + length, i);
        } else {
          length = idx >= 0 ? Math.min(idx + 1, length) : idx + length + 1;
        }
      } else if (sortedIndex && idx && length) {
        idx = sortedIndex(array, item);
        return array[idx] === item ? idx : -1;
      }
      if (item !== item) {
        idx = predicateFind(slice.call(array, i, length), isNaN$1);
        return idx >= 0 ? idx + i : -1;
      }
      for (idx = dir > 0 ? i : length - 1; idx >= 0 && idx < length; idx += dir) {
        if (array[idx] === item) return idx;
      }
      return -1;
    };
  }

// Return the position of the first occurrence of an item in an array,
  // or -1 if the item is not included in the array.
  // If the array is large and already in sort order, pass `true`
  // for **isSorted** to use binary search.
  var indexOf = createIndexFinder(1, findIndex, sortedIndex);

// Return the position of the last occurrence of an item in an array,
  // or -1 if the item is not included in the array.
  var lastIndexOf = createIndexFinder(-1, findLastIndex);

// Return the first value which passes a truth test.
  function find(obj, predicate, context) {
    var keyFinder = isArrayLike(obj) ? findIndex : findKey;
    var key = keyFinder(obj, predicate, context);
    if (key !== void 0 && key !== -1) return obj[key];
  }

// Convenience version of a common use case of `_.find`: getting the first
  // object containing specific `key:value` pairs.
  function findWhere(obj, attrs) {
    return find(obj, matcher(attrs));
  }

// The cornerstone for collection functions, an `each`
  // implementation, aka `forEach`.
  // Handles raw objects in addition to array-likes. Treats all
  // sparse array-likes as if they were dense.
  function each(obj, iteratee, context) {
    iteratee = optimizeCb(iteratee, context);
    var i, length;
    if (isArrayLike(obj)) {
      for (i = 0, length = obj.length; i < length; i++) {
        iteratee(obj[i], i, obj);
      }
    } else {
      var _keys = keys(obj);
      for (i = 0, length = _keys.length; i < length; i++) {
        iteratee(obj[_keys[i]], _keys[i], obj);
      }
    }
    return obj;
  }

// Return the results of applying the iteratee to each element.
  function map(obj, iteratee, context) {
    iteratee = cb(iteratee, context);
    var _keys = !isArrayLike(obj) && keys(obj),
        length = (_keys || obj).length,
        results = Array(length);
    for (var index = 0; index < length; index++) {
      var currentKey = _keys ? _keys[index] : index;
      results[index] = iteratee(obj[currentKey], currentKey, obj);
    }
    return results;
  }

// Internal helper to create a reducing function, iterating left or right.
  function createReduce(dir) {
    // Wrap code that reassigns argument variables in a separate function than
    // the one that accesses `arguments.length` to avoid a perf hit. (#1991)
    var reducer = function(obj, iteratee, memo, initial) {
      var _keys = !isArrayLike(obj) && keys(obj),
          length = (_keys || obj).length,
          index = dir > 0 ? 0 : length - 1;
      if (!initial) {
        memo = obj[_keys ? _keys[index] : index];
        index += dir;
      }
      for (; index >= 0 && index < length; index += dir) {
        var currentKey = _keys ? _keys[index] : index;
        memo = iteratee(memo, obj[currentKey], currentKey, obj);
      }
      return memo;
    };

return function(obj, iteratee, memo, context) {
      var initial = arguments.length >= 3;
      return reducer(obj, optimizeCb(iteratee, context, 4), memo, initial);
    };
  }

// **Reduce** builds up a single result from a list of values, aka `inject`,
  // or `foldl`.
  var reduce = createReduce(1);

// The right-associative version of reduce, also known as `foldr`.
  var reduceRight = createReduce(-1);

// Return all the elements that pass a truth test.
  function filter(obj, predicate, context) {
    var results = [];
    predicate = cb(predicate, context);
    each(obj, function(value, index, list) {
      if (predicate(value, index, list)) results.push(value);
    });
    return results;
  }

// Return all the elements for which a truth test fails.
  function reject(obj, predicate, context) {
    return filter(obj, negate(cb(predicate)), context);
  }

// Determine whether all of the elements pass a truth test.
  function every(obj, predicate, context) {
    predicate = cb(predicate, context);
    var _keys = !isArrayLike(obj) && keys(obj),
        length = (_keys || obj).length;
    for (var index = 0; index < length; index++) {
      var currentKey = _keys ? _keys[index] : index;
      if (!predicate(obj[currentKey], currentKey, obj)) return false;
    }
    return true;
  }

// Determine if at least one element in the object passes a truth test.
  function some(obj, predicate, context) {
    predicate = cb(predicate, context);
    var _keys = !isArrayLike(obj) && keys(obj),
        length = (_keys || obj).length;
    for (var index = 0; index < length; index++) {
      var currentKey = _keys ? _keys[index] : index;
      if (predicate(obj[currentKey], currentKey, obj)) return true;
    }
    return false;
  }

// Determine if the array or object contains a given item (using `===`).
  function contains(obj, item, fromIndex, guard) {
    if (!isArrayLike(obj)) obj = values(obj);
    if (typeof fromIndex != 'number' || guard) fromIndex = 0;
    return indexOf(obj, item, fromIndex) >= 0;
  }

// Invoke a method (with arguments) on every item in a collection.
  var invoke = restArguments(function(obj, path, args) {
    var contextPath, func;
    if (isFunction$1(path)) {
      func = path;
    } else {
      path = toPath(path);
      contextPath = path.slice(0, -1);
      path = path[path.length - 1];
    }
    return map(obj, function(context) {
      var method = func;
      if (!method) {
        if (contextPath && contextPath.length) {
          context = deepGet(context, contextPath);
        }
        if (context == null) return void 0;
        method = context[path];
      }
      return method == null ? method : method.apply(context, args);
    });
  });

// Convenience version of a common use case of `_.map`: fetching a property.
  function pluck(obj, key) {
    return map(obj, property(key));
  }

// Convenience version of a common use case of `_.filter`: selecting only
  // objects containing specific `key:value` pairs.
  function where(obj, attrs) {
    return filter(obj, matcher(attrs));
  }

// Return the maximum element (or element-based computation).
  function max(obj, iteratee, context) {
    var result = -Infinity, lastComputed = -Infinity,
        value, computed;
    if (iteratee == null || (typeof iteratee == 'number' && typeof obj[0] != 'object' && obj != null)) {
      obj = isArrayLike(obj) ? obj : values(obj);
      for (var i = 0, length = obj.length; i < length; i++) {
        value = obj[i];
        if (value != null && value > result) {
          result = value;
        }
      }
    } else {
      iteratee = cb(iteratee, context);
      each(obj, function(v, index, list) {
        computed = iteratee(v, index, list);
        if (computed > lastComputed || (computed === -Infinity && result === -Infinity)) {
          result = v;
          lastComputed = computed;
        }
      });
    }
    return result;
  }

// Return the minimum element (or element-based computation).
  function min(obj, iteratee, context) {
    var result = Infinity, lastComputed = Infinity,
        value, computed;
    if (iteratee == null || (typeof iteratee == 'number' && typeof obj[0] != 'object' && obj != null)) {
      obj = isArrayLike(obj) ? obj : values(obj);
      for (var i = 0, length = obj.length; i < length; i++) {
        value = obj[i];
        if (value != null && value < result) {
          result = value;
        }
      }
    } else {
      iteratee = cb(iteratee, context);
      each(obj, function(v, index, list) {
        computed = iteratee(v, index, list);
        if (computed < lastComputed || (computed === Infinity && result === Infinity)) {
          result = v;
          lastComputed = computed;
        }
      });
    }
    return result;
  }

// Safely create a real, live array from anything iterable.
  var reStrSymbol = /[^\ud800-\udfff]|[\ud800-\udbff][\udc00-\udfff]|[\ud800-\udfff]/g;
  function toArray(obj) {
    if (!obj) return [];
    if (isArray(obj)) return slice.call(obj);
    if (isString(obj)) {
      // Keep surrogate pair characters together.
      return obj.match(reStrSymbol);
    }
    if (isArrayLike(obj)) return map(obj, identity);
    return values(obj);
  }

// Sample **n** random values from a collection using the modern version of the
  // [Fisher-Yates shuffle](https://en.wikipedia.org/wiki/Fisher–Yates_shuffle).
  // If **n** is not specified, returns a single random element.
  // The internal `guard` argument allows it to work with `_.map`.
  function sample(obj, n, guard) {
    if (n == null || guard) {
      if (!isArrayLike(obj)) obj = values(obj);
      return obj[random(obj.length - 1)];
    }
    var sample = toArray(obj);
    var length = getLength(sample);
    n = Math.max(Math.min(n, length), 0);
    var last = length - 1;
    for (var index = 0; index < n; index++) {
      var rand = random(index, last);
      var temp = sample[index];
      sample[index] = sample[rand];
      sample[rand] = temp;
    }
    return sample.slice(0, n);
  }

// Shuffle a collection.
  function shuffle(obj) {
    return sample(obj, Infinity);
  }

// Sort the object's values by a criterion produced by an iteratee.
  function sortBy(obj, iteratee, context) {
    var index = 0;
    iteratee = cb(iteratee, context);
    return pluck(map(obj, function(value, key, list) {
      return {
        value: value,
        index: index++,
        criteria: iteratee(value, key, list)
      };
    }).sort(function(left, right) {
      var a = left.criteria;
      var b = right.criteria;
      if (a !== b) {
        if (a > b || a === void 0) return 1;
        if (a < b || b === void 0) return -1;
      }
      return left.index - right.index;
    }), 'value');
  }

// An internal function used for aggregate "group by" operations.
  function group(behavior, partition) {
    return function(obj, iteratee, context) {
      var result = partition ? [[], []] : {};
      iteratee = cb(iteratee, context);
      each(obj, function(value, index) {
        var key = iteratee(value, index, obj);
        behavior(result, value, key);
      });
      return result;
    };
  }

// Groups the object's values by a criterion. Pass either a string attribute
  // to group by, or a function that returns the criterion.
  var groupBy = group(function(result, value, key) {
    if (has$1(result, key)) result[key].push(value); else result[key] = [value];
  });

// Indexes the object's values by a criterion, similar to `_.groupBy`, but for
  // when you know that your index values will be unique.
  var indexBy = group(function(result, value, key) {
    result[key] = value;
  });

// Counts instances of an object that group by a certain criterion. Pass
  // either a string attribute to count by, or a function that returns the
  // criterion.
  var countBy = group(function(result, value, key) {
    if (has$1(result, key)) result[key]++; else result[key] = 1;
  });

// Split a collection into two arrays: one whose elements all pass the given
  // truth test, and one whose elements all do not pass the truth test.
  var partition = group(function(result, value, pass) {
    result[pass ? 0 : 1].push(value);
  }, true);

// Return the number of elements in a collection.
  function size(obj) {
    if (obj == null) return 0;
    return isArrayLike(obj) ? obj.length : keys(obj).length;
  }

// Internal `_.pick` helper function to determine whether `key` is an enumerable
  // property name of `obj`.
  function keyInObj(value, key, obj) {
    return key in obj;
  }

// Return a copy of the object only containing the allowed properties.
  var pick = restArguments(function(obj, keys) {
    var result = {}, iteratee = keys[0];
    if (obj == null) return result;
    if (isFunction$1(iteratee)) {
      if (keys.length > 1) iteratee = optimizeCb(iteratee, keys[1]);
      keys = allKeys(obj);
    } else {
      iteratee = keyInObj;
      keys = flatten$1(keys, false, false);
      obj = Object(obj);
    }
    for (var i = 0, length = keys.length; i < length; i++) {
      var key = keys[i];
      var value = obj[key];
      if (iteratee(value, key, obj)) result[key] = value;
    }
    return result;
  });

// Return a copy of the object without the disallowed properties.
  var omit = restArguments(function(obj, keys) {
    var iteratee = keys[0], context;
    if (isFunction$1(iteratee)) {
      iteratee = negate(iteratee);
      if (keys.length > 1) context = keys[1];
    } else {
      keys = map(flatten$1(keys, false, false), String);
      iteratee = function(value, key) {
        return !contains(keys, key);
      };
    }
    return pick(obj, iteratee, context);
  });

// Returns everything but the last entry of the array. Especially useful on
  // the arguments object. Passing **n** will return all the values in
  // the array, excluding the last N.
  function initial(array, n, guard) {
    return slice.call(array, 0, Math.max(0, array.length - (n == null || guard ? 1 : n)));
  }

// Get the first element of an array. Passing **n** will return the first N
  // values in the array. The **guard** check allows it to work with `_.map`.
  function first(array, n, guard) {
    if (array == null || array.length < 1) return n == null || guard ? void 0 : [];
    if (n == null || guard) return array[0];
    return initial(array, array.length - n);
  }

// Returns everything but the first entry of the `array`. Especially useful on
  // the `arguments` object. Passing an **n** will return the rest N values in the
  // `array`.
  function rest(array, n, guard) {
    return slice.call(array, n == null || guard ? 1 : n);
  }

// Get the last element of an array. Passing **n** will return the last N
  // values in the array.
  function last(array, n, guard) {
    if (array == null || array.length < 1) return n == null || guard ? void 0 : [];
    if (n == null || guard) return array[array.length - 1];
    return rest(array, Math.max(0, array.length - n));
  }

// Trim out all falsy values from an array.
  function compact(array) {
    return filter(array, Boolean);
  }

// Flatten out an array, either recursively (by default), or up to `depth`.
  // Passing `true` or `false` as `depth` means `1` or `Infinity`, respectively.
  function flatten(array, depth) {
    return flatten$1(array, depth, false);
  }

// Take the difference between one array and a number of other arrays.
  // Only the elements present in just the first array will remain.
  var difference = restArguments(function(array, rest) {
    rest = flatten$1(rest, true, true);
    return filter(array, function(value){
      return !contains(rest, value);
    });
  });

// Return a version of the array that does not contain the specified value(s).
  var without = restArguments(function(array, otherArrays) {
    return difference(array, otherArrays);
  });

// Produce a duplicate-free version of the array. If the array has already
  // been sorted, you have the option of using a faster algorithm.
  // The faster algorithm will not work with an iteratee if the iteratee
  // is not a one-to-one function, so providing an iteratee will disable
  // the faster algorithm.
  function uniq(array, isSorted, iteratee, context) {
    if (!isBoolean(isSorted)) {
      context = iteratee;
      iteratee = isSorted;
      isSorted = false;
    }
    if (iteratee != null) iteratee = cb(iteratee, context);
    var result = [];
    var seen = [];
    for (var i = 0, length = getLength(array); i < length; i++) {
      var value = array[i],
          computed = iteratee ? iteratee(value, i, array) : value;
      if (isSorted && !iteratee) {
        if (!i || seen !== computed) result.push(value);
        seen = computed;
      } else if (iteratee) {
        if (!contains(seen, computed)) {
          seen.push(computed);
          result.push(value);
        }
      } else if (!contains(result, value)) {
        result.push(value);
      }
    }
    return result;
  }

// Produce an array that contains the union: each distinct element from all of
  // the passed-in arrays.
  var union = restArguments(function(arrays) {
    return uniq(flatten$1(arrays, true, true));
  });

// Produce an array that contains every item shared between all the
  // passed-in arrays.
  function intersection(array) {
    var result = [];
    var argsLength = arguments.length;
    for (var i = 0, length = getLength(array); i < length; i++) {
      var item = array[i];
      if (contains(result, item)) continue;
      var j;
      for (j = 1; j < argsLength; j++) {
        if (!contains(arguments[j], item)) break;
      }
      if (j === argsLength) result.push(item);
    }
    return result;
  }

// Complement of zip. Unzip accepts an array of arrays and groups
  // each array's elements on shared indices.
  function unzip(array) {
    var length = (array && max(array, getLength).length) || 0;
    var result = Array(length);

for (var index = 0; index < length; index++) {
      result[index] = pluck(array, index);
    }
    return result;
  }

// Zip together multiple lists into a single array -- elements that share
  // an index go together.
  var zip = restArguments(unzip);

// Converts lists into objects. Pass either a single array of `[key, value]`
  // pairs, or two parallel arrays of the same length -- one of keys, and one of
  // the corresponding values. Passing by pairs is the reverse of `_.pairs`.
  function object(list, values) {
    var result = {};
    for (var i = 0, length = getLength(list); i < length; i++) {
      if (values) {
        result[list[i]] = values[i];
      } else {
        result[list[i][0]] = list[i][1];
      }
    }
    return result;
  }

// Generate an integer Array containing an arithmetic progression. A port of
  // the native Python `range()` function. See
  // [the Python documentation](https://docs.python.org/library/functions.html#range).
  function range(start, stop, step) {
    if (stop == null) {
      stop = start || 0;
      start = 0;
    }
    if (!step) {
      step = stop < start ? -1 : 1;
    }

var length = Math.max(Math.ceil((stop - start) / step), 0);
    var range = Array(length);

for (var idx = 0; idx < length; idx++, start += step) {
      range[idx] = start;
    }

return range;
  }

// Chunk a single array into multiple arrays, each containing `count` or fewer
  // items.
  function chunk(array, count) {
    if (count == null || count < 1) return [];
    var result = [];
    var i = 0, length = array.length;
    while (i < length) {
      result.push(slice.call(array, i, i += count));
    }
    return result;
  }

// Helper function to continue chaining intermediate results.
  function chainResult(instance, obj) {
    return instance._chain ? _$1(obj).chain() : obj;
  }

// Add your own custom functions to the Underscore object.
  function mixin(obj) {
    each(functions(obj), function(name) {
      var func = _$1[name] = obj[name];
      _$1.prototype[name] = function() {
        var args = [this._wrapped];
        push.apply(args, arguments);
        return chainResult(this, func.apply(_$1, args));
      };
    });
    return _$1;
  }

// Add all mutator `Array` functions to the wrapper.
  each(['pop', 'push', 'reverse', 'shift', 'sort', 'splice', 'unshift'], function(name) {
    var method = ArrayProto[name];
    _$1.prototype[name] = function() {
      var obj = this._wrapped;
      if (obj != null) {
        method.apply(obj, arguments);
        if ((name === 'shift' || name === 'splice') && obj.length === 0) {
          delete obj[0];
        }
      }
      return chainResult(this, obj);
    };
  });

// Add all accessor `Array` functions to the wrapper.
  each(['concat', 'join', 'slice'], function(name) {
    var method = ArrayProto[name];
    _$1.prototype[name] = function() {
      var obj = this._wrapped;
      if (obj != null) obj = method.apply(obj, arguments);
      return chainResult(this, obj);
    };
  });

// Named Exports

var allExports = {
    __proto__: null,
    VERSION: VERSION,
    restArguments: restArguments,
    isObject: isObject,
    isNull: isNull,
    isUndefined: isUndefined,
    isBoolean: isBoolean,
    isElement: isElement,
    isString: isString,
    isNumber: isNumber,
    isDate: isDate,
    isRegExp: isRegExp,
    isError: isError,
    isSymbol: isSymbol,
    isArrayBuffer: isArrayBuffer,
    isDataView: isDataView$1,
    isArray: isArray,
    isFunction: isFunction$1,
    isArguments: isArguments$1,
    isFinite: isFinite$1,
    isNaN: isNaN$1,
    isTypedArray: isTypedArray$1,
    isEmpty: isEmpty,
    isMatch: isMatch,
    isEqual: isEqual,
    isMap: isMap,
    isWeakMap: isWeakMap,
    isSet: isSet,
    isWeakSet: isWeakSet,
    keys: keys,
    allKeys: allKeys,
    values: values,
    pairs: pairs,
    invert: invert,
    functions: functions,
    methods: functions,
    extend: extend,
    extendOwn: extendOwn,
    assign: extendOwn,
    defaults: defaults,
    create: create,
    clone: clone,
    tap: tap,
    get: get,
    has: has,
    mapObject: mapObject,
    identity: identity,
    constant: constant,
    noop: noop,
    toPath: toPath$1,
    property: property,
    propertyOf: propertyOf,
    matcher: matcher,
    matches: matcher,
    times: times,
    random: random,
    now: now,
    escape: _escape,
    unescape: _unescape,
    templateSettings: templateSettings,
    template: template,
    result: result,
    uniqueId: uniqueId,
    chain: chain,
    iteratee: iteratee,
    partial: partial,
    bind: bind,
    bindAll: bindAll,
    memoize: memoize,
    delay: delay,
    defer: defer,
    throttle: throttle,
    debounce: debounce,
    wrap: wrap,
    negate: negate,
    compose: compose,
    after: after,
    before: before,
    once: once,
    findKey: findKey,
    findIndex: findIndex,
    findLastIndex: findLastIndex,
    sortedIndex: sortedIndex,
    indexOf: indexOf,
    lastIndexOf: lastIndexOf,
    find: find,
    detect: find,
    findWhere: findWhere,
    each: each,
    forEach: each,
    map: map,
    collect: map,
    reduce: reduce,
    foldl: reduce,
    inject: reduce,
    reduceRight: reduceRight,
    foldr: reduceRight,
    filter: filter,
    select: filter,
    reject: reject,
    every: every,
    all: every,
    some: some,
    any: some,
    contains: contains,
    includes: contains,
    include: contains,
    invoke: invoke,
    pluck: pluck,
    where: where,
    max: max,
    min: min,
    shuffle: shuffle,
    sample: sample,
    sortBy: sortBy,
    groupBy: groupBy,
    indexBy: indexBy,
    countBy: countBy,
    partition: partition,
    toArray: toArray,
    size: size,
    pick: pick,
    omit: omit,
    first: first,
    head: first,
    take: first,
    initial: initial,
    last: last,
    rest: rest,
    tail: rest,
    drop: rest,
    compact: compact,
    flatten: flatten,
    without: without,
    uniq: uniq,
    unique: uniq,
    union: union,
    intersection: intersection,
    difference: difference,
    unzip: unzip,
    transpose: unzip,
    zip: zip,
    object: object,
    range: range,
    chunk: chunk,
    mixin: mixin,
    'default': _$1
  };

// Default Export

// Add all of the Underscore functions to the wrapper object.
  var _ = mixin(allExports);
  // Legacy Node.js API.
  _._ = _;

return _;

})));

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