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Posted to commits@ranger.apache.org by me...@apache.org on 2022/01/04 13:45:48 UTC
[ranger] branch master updated: RANGER-3487 : Update underscorejs with latest version.
This is an automated email from the ASF dual-hosted git repository.
mehul pushed a commit to branch master
in repository https://gitbox.apache.org/repos/asf/ranger.git
The following commit(s) were added to refs/heads/master by this push:
new 26401a9 RANGER-3487 : Update underscorejs with latest version.
26401a9 is described below
commit 26401a9024b6e02389a87c4700eccf0a7b96302b
Author: Nitin Galave <ni...@apache.org>
AuthorDate: Tue Dec 7 18:52:02 2021 +0530
RANGER-3487 : Update underscorejs with latest version.
Signed-off-by: Mehul Parikh <me...@apache.org>
---
.../libs/bower/underscore/js/underscore-min.js | 5 -
.../webapp/libs/bower/underscore/js/underscore.js | 3068 +++++++++++---------
2 files changed, 1708 insertions(+), 1365 deletions(-)
diff --git a/security-admin/src/main/webapp/libs/bower/underscore/js/underscore-min.js b/security-admin/src/main/webapp/libs/bower/underscore/js/underscore-min.js
deleted file mode 100644
index 898bd44..0000000
--- a/security-admin/src/main/webapp/libs/bower/underscore/js/underscore-min.js
+++ /dev/null
@@ -1,5 +0,0 @@
-// Underscore.js 1.9.2
-// https://underscorejs.org
-// (c) 2009-2018 Jeremy Ashkenas, DocumentCloud and Investigative Reporters & Editors
-// Underscore may be freely distributed under the MIT license.
-!function(){var n="object"==typeof self&&self.self===self&&self||"object"==typeof global&&global.global===global&&global||this||{},r=n._,e=Array.prototype,o=Object.prototype,s="undefined"!=typeof Symbol?Symbol.prototype:null,u=e.push,c=e.slice,p=o.toString,i=o.hasOwnProperty,t=Array.isArray,a=Object.keys,l=Object.create,f=function(){},h=function(n){return n instanceof h?n:this instanceof h?void(this._wrapped=n):new h(n)};"undefined"==typeof exports||exports.nodeType?n._=h:("undefined"!=t [...]
\ No newline at end of file
diff --git a/security-admin/src/main/webapp/libs/bower/underscore/js/underscore.js b/security-admin/src/main/webapp/libs/bower/underscore/js/underscore.js
index 5cdf62e..ef8706b 100644
--- a/security-admin/src/main/webapp/libs/bower/underscore/js/underscore.js
+++ b/security-admin/src/main/webapp/libs/bower/underscore/js/underscore.js
@@ -1,24 +1,21 @@
-// Underscore.js 1.9.2
-// https://underscorejs.org
-// (c) 2009-2018 Jeremy Ashkenas, DocumentCloud and Investigative Reporters & Editors
-// Underscore may be freely distributed under the MIT license.
-
(function() {
- // Baseline setup
- // --------------
+ // Underscore.js 1.13.1
+ // https://underscorejs.org
+ // (c) 2009-2021 Jeremy Ashkenas, Julian Gonggrijp, and DocumentCloud and Investigative Reporters & Editors
+ // Underscore may be freely distributed under the MIT license.
+
+ // Current version.
+ var VERSION = '1.13.1';
// 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 ||
- this ||
+ Function('return this')() ||
{};
- // Save the previous value of the `_` variable.
- var previousUnderscore = root._;
-
// Save bytes in the minified (but not gzipped) version:
var ArrayProto = Array.prototype, ObjProto = Object.prototype;
var SymbolProto = typeof Symbol !== 'undefined' ? Symbol.prototype : null;
@@ -29,87 +26,35 @@
toString = ObjProto.toString,
hasOwnProperty = ObjProto.hasOwnProperty;
- // All **ECMAScript 5** native function implementations that we hope to use
+ // 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;
-
- // Naked function reference for surrogate-prototype-swapping.
- var Ctor = function(){};
-
- // Create a safe reference to the Underscore object for use below.
- var _ = function(obj) {
- if (obj instanceof _) return obj;
- if (!(this instanceof _)) return new _(obj);
- this._wrapped = obj;
- };
-
- // Export the Underscore object for **Node.js**, with
- // backwards-compatibility for their old module API. If we're in
- // the browser, add `_` as a global object.
- // (`nodeType` is checked to ensure that `module`
- // and `exports` are not HTML elements.)
- if (typeof exports != 'undefined' && !exports.nodeType) {
- if (typeof module != 'undefined' && !module.nodeType && module.exports) {
- exports = module.exports = _;
- }
- exports._ = _;
- } else {
- root._ = _;
- }
-
- // Current version.
- _.VERSION = '1.9.2';
-
- // Internal function that returns an efficient (for current engines) version
- // of the passed-in callback, to be repeatedly applied in other Underscore
- // functions.
- var optimizeCb = function(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);
- };
- };
+ nativeCreate = Object.create,
+ nativeIsView = supportsArrayBuffer && ArrayBuffer.isView;
- var builtinIteratee;
+ // Create references to these builtin functions because we override them.
+ var _isNaN = isNaN,
+ _isFinite = isFinite;
- // 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.
- var cb = function(value, context, argCount) {
- if (_.iteratee !== builtinIteratee) return _.iteratee(value, context);
- if (value == null) return _.identity;
- if (_.isFunction(value)) return optimizeCb(value, context, argCount);
- if (_.isObject(value) && !_.isArray(value)) return _.matcher(value);
- return _.property(value);
- };
+ // 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'];
- // 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.
- _.iteratee = builtinIteratee = function(value, context) {
- return cb(value, context, Infinity);
- };
+ // 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".
- var restArguments = function(func, startIndex) {
+ function restArguments(func, startIndex) {
startIndex = startIndex == null ? func.length - 1 : +startIndex;
return function() {
var length = Math.max(arguments.length - startIndex, 0),
@@ -130,659 +75,920 @@
args[startIndex] = rest;
return func.apply(this, args);
};
- };
+ }
- // An internal function for creating a new object that inherits from another.
- var baseCreate = function(prototype) {
- if (!_.isObject(prototype)) return {};
- if (nativeCreate) return nativeCreate(prototype);
- Ctor.prototype = prototype;
- var result = new Ctor;
- Ctor.prototype = null;
- return result;
- };
+ // 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);
+ }
- var shallowProperty = function(key) {
+ // Internal function for creating a `toString`-based type tester.
+ function tagTester(name) {
+ var tag = '[object ' + name + ']';
return function(obj) {
- return obj == null ? void 0 : obj[key];
+ return toString.call(obj) === tag;
};
- };
+ }
+
+ var isString = tagTester('String');
+
+ var isNumber = tagTester('Number');
- var has = function(obj, path) {
- return obj != null && hasOwnProperty.call(obj, path);
+ 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 deepGet = function(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;
- };
+ var isFunction$1 = isFunction;
- // 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 MAX_ARRAY_INDEX = Math.pow(2, 53) - 1;
- var getLength = shallowProperty('length');
- var isArrayLike = function(collection) {
- var length = getLength(collection);
- return typeof length == 'number' && length >= 0 && length <= MAX_ARRAY_INDEX;
- };
+ var hasObjectTag = tagTester('Object');
- // Collection Functions
- // --------------------
+ // 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`.
+ var hasStringTagBug = (
+ supportsDataView && hasObjectTag(new DataView(new ArrayBuffer(8)))
+ ),
+ isIE11 = (typeof Map !== 'undefined' && hasObjectTag(new Map));
- // The cornerstone, an `each` implementation, aka `forEach`.
- // Handles raw objects in addition to array-likes. Treats all
- // sparse array-likes as if they were dense.
- _.each = _.forEach = function(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);
- }
+ var isDataView = tagTester('DataView');
+
+ // In IE 10 - Edge 13, we need a different heuristic
+ // to determine whether an object is a `DataView`.
+ function ie10IsDataView(obj) {
+ return obj != null && isFunction$1(obj.getInt8) && isArrayBuffer(obj.buffer);
+ }
+
+ var isDataView$1 = (hasStringTagBug ? ie10IsDataView : 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');
+ };
}
- return obj;
- };
+ }());
- // Return the results of applying the iteratee to each element.
- _.map = _.collect = function(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);
+ 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;
}
- return results;
- };
+ }
- // Create a reducing function iterating left or right.
- var createReduce = function(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;
+ // 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];
};
+ }
- return function(obj, iteratee, memo, context) {
- var initial = arguments.length >= 3;
- return reducer(obj, optimizeCb(iteratee, context, 4), memo, initial);
+ // 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]; },
+ push: function(key) {
+ hash[key] = true;
+ return keys.push(key);
+ }
};
- };
+ }
- // **Reduce** builds up a single result from a list of values, aka `inject`,
- // or `foldl`.
- _.reduce = _.foldl = _.inject = createReduce(1);
+ // 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;
- // The right-associative version of reduce, also known as `foldr`.
- _.reduceRight = _.foldr = createReduce(-1);
+ // Constructor is a special case.
+ var prop = 'constructor';
+ if (has$1(obj, prop) && !keys.contains(prop)) keys.push(prop);
- // Return the first value which passes a truth test. Aliased as `detect`.
- _.find = _.detect = function(obj, predicate, context) {
- var keyFinder = isArrayLike(obj) ? _.findIndex : _.findKey;
- var key = keyFinder(obj, predicate, context);
- if (key !== void 0 && key !== -1) return obj[key];
- };
+ while (nonEnumIdx--) {
+ prop = nonEnumerableProps[nonEnumIdx];
+ if (prop in obj && obj[prop] !== proto[prop] && !keys.contains(prop)) {
+ keys.push(prop);
+ }
+ }
+ }
- // Return all the elements that pass a truth test.
- // Aliased as `select`.
- _.filter = _.select = function(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;
- };
+ // 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;
+ }
- // Return all the elements for which a truth test fails.
- _.reject = function(obj, predicate, context) {
- return _.filter(obj, _.negate(cb(predicate)), context);
- };
+ // 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;
+ }
- // Determine whether all of the elements match a truth test.
- // Aliased as `all`.
- _.every = _.all = function(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;
+ // 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;
- };
+ }
- // Determine if at least one element in the object matches a truth test.
- // Aliased as `any`.
- _.some = _.any = function(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;
- };
+ // 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;
+ }
- // Determine if the array or object contains a given item (using `===`).
- // Aliased as `includes` and `include`.
- _.contains = _.includes = _.include = function(obj, item, fromIndex, guard) {
- if (!isArrayLike(obj)) obj = _.values(obj);
- if (typeof fromIndex != 'number' || guard) fromIndex = 0;
- return _.indexOf(obj, item, fromIndex) >= 0;
+ _$1.VERSION = VERSION;
+
+ // Extracts the result from a wrapped and chained object.
+ _$1.prototype.value = function() {
+ return this._wrapped;
};
- // Invoke a method (with arguments) on every item in a collection.
- _.invoke = restArguments(function(obj, path, args) {
- var contextPath, func;
- if (_.isFunction(path)) {
- func = path;
- } else if (_.isArray(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);
- });
- });
+ // 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;
- // Convenience version of a common use case of `map`: fetching a property.
- _.pluck = function(obj, key) {
- return _.map(obj, _.property(key));
+ _$1.prototype.toString = function() {
+ return String(this._wrapped);
};
- // Convenience version of a common use case of `filter`: selecting only objects
- // containing specific `key:value` pairs.
- _.where = function(obj, attrs) {
- return _.filter(obj, _.matcher(attrs));
- };
+ // 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)
+ );
+ }
- // Convenience version of a common use case of `find`: getting the first object
- // containing specific `key:value` pairs.
- _.findWhere = function(obj, attrs) {
- return _.find(obj, _.matcher(attrs));
- };
+ // We use this string twice, so give it a name for minification.
+ var tagDataView = '[object DataView]';
- // Return the maximum element (or element-based computation).
- _.max = function(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;
- }
+ // 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 (hasStringTagBug && 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;
}
- } 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;
- };
+ // Assume equality for cyclic structures. The algorithm for detecting cyclic
+ // structures is adapted from ES 5.1 section 15.12.3, abstract operation `JO`.
- // Return the minimum element (or element-based computation).
- _.min = function(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;
- }
+ // 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 {
- 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;
- }
- });
+ // 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;
+ }
}
- return result;
- };
+ // Remove the first object from the stack of traversed objects.
+ aStack.pop();
+ bStack.pop();
+ return true;
+ }
- // Shuffle a collection.
- _.shuffle = function(obj) {
- return _.sample(obj, Infinity);
- };
+ // Perform a deep comparison to check if two objects are equal.
+ function isEqual(a, b) {
+ return eq(a, b);
+ }
- // 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`.
- _.sample = function(obj, n, guard) {
- if (n == null || guard) {
- if (!isArrayLike(obj)) obj = _.values(obj);
- return obj[_.random(obj.length - 1)];
+ // 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]];
}
- var sample = isArrayLike(obj) ? _.clone(obj) : _.values(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 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 sample.slice(0, n);
- };
+ return pairs;
+ }
- // Sort the object's values by a criterion produced by an iteratee.
- _.sortBy = function(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');
- };
+ // 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;
+ }
- // An internal function used for aggregate "group by" operations.
- var group = function(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;
+ // 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;
};
- };
+ }
- // Groups the object's values by a criterion. Pass either a string attribute
- // to group by, or a function that returns the criterion.
- _.groupBy = group(function(result, value, key) {
- if (has(result, key)) result[key].push(value); else result[key] = [value];
- });
+ // Extend a given object with all the properties in passed-in object(s).
+ var extend = createAssigner(allKeys);
- // Indexes the object's values by a criterion, similar to `groupBy`, but for
- // when you know that your index values will be unique.
- _.indexBy = group(function(result, value, key) {
- result[key] = value;
- });
+ // 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);
- // Counts instances of an object that group by a certain criterion. Pass
- // either a string attribute to count by, or a function that returns the
- // criterion.
- _.countBy = group(function(result, value, key) {
- if (has(result, key)) result[key]++; else result[key] = 1;
- });
+ // Fill in a given object with default properties.
+ var defaults = createAssigner(allKeys, true);
- var reStrSymbol = /[^\ud800-\udfff]|[\ud800-\udbff][\udc00-\udfff]|[\ud800-\udfff]/g;
- // Safely create a real, live array from anything iterable.
- _.toArray = function(obj) {
- if (!obj) return [];
- if (_.isArray(obj)) return slice.call(obj);
- if (_.isString(obj)) {
- // Keep surrogate pair characters together
- return obj.match(reStrSymbol);
+ // 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]];
}
- if (isArrayLike(obj)) return _.map(obj, _.identity);
- return _.values(obj);
- };
+ return length ? obj : void 0;
+ }
- // Return the number of elements in an object.
- _.size = function(obj) {
- if (obj == null) return 0;
- return isArrayLike(obj) ? obj.length : _.keys(obj).length;
- };
+ // 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);
+ };
+ }
- // Split a collection into two arrays: one whose elements all satisfy the given
- // predicate, and one whose elements all do not satisfy the predicate.
- _.partition = group(function(result, value, pass) {
- result[pass ? 0 : 1].push(value);
- }, true);
+ // 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);
+ }
- // Array Functions
- // ---------------
+ // 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;
- // Get the first element of an array. Passing **n** will return the first N
- // values in the array. Aliased as `head` and `take`. The **guard** check
- // allows it to work with `_.map`.
- _.first = _.head = _.take = function(array, n, guard) {
- if (array == null || array.length < 1) return n == null ? void 0 : [];
- if (n == null || guard) return array[0];
- return _.initial(array, array.length - n);
- };
+ // 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 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.
- _.initial = function(array, n, guard) {
- return slice.call(array, 0, Math.max(0, array.length - (n == null || guard ? 1 : n)));
- };
+ // 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;
+ }
- // Get the last element of an array. Passing **n** will return the last N
- // values in the array.
- _.last = function(array, n, guard) {
- if (array == null || array.length < 1) return n == null ? void 0 : [];
- if (n == null || guard) return array[array.length - 1];
- return _.rest(array, Math.max(0, array.length - n));
- };
+ // Predicate-generating function. Often useful outside of Underscore.
+ function noop(){}
- // Returns everything but the first entry of the array. Aliased as `tail` and `drop`.
- // Especially useful on the arguments object. Passing an **n** will return
- // the rest N values in the array.
- _.rest = _.tail = _.drop = function(array, n, guard) {
- return slice.call(array, n == null || guard ? 1 : n);
- };
+ // 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);
+ };
+ }
- // Trim out all falsy values from an array.
- _.compact = function(array) {
- return _.filter(array, Boolean);
- };
+ // 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;
+ }
- // Internal implementation of a recursive `flatten` function.
- var flatten = function(input, shallow, strict, output) {
- output = output || [];
- var idx = output.length;
- for (var i = 0, length = getLength(input); i < length; i++) {
- var value = input[i];
- if (isArrayLike(value) && (_.isArray(value) || _.isArguments(value))) {
- // Flatten current level of array or arguments object.
- if (shallow) {
- var j = 0, len = value.length;
- while (j < len) output[idx++] = value[j++];
- } else {
- flatten(value, shallow, strict, output);
- idx = output.length;
- }
- } else if (!strict) {
- output[idx++] = value;
- }
+ // Return a random integer between `min` and `max` (inclusive).
+ function random(min, max) {
+ if (max == null) {
+ max = min;
+ min = 0;
}
- return output;
- };
+ return min + Math.floor(Math.random() * (max - min + 1));
+ }
- // Flatten out an array, either recursively (by default), or just one level.
- _.flatten = function(array, shallow) {
- return flatten(array, shallow, false);
+ // A (possibly faster) way to get the current timestamp as an integer.
+ var now = Date.now || function() {
+ return new Date().getTime();
};
- // Return a version of the array that does not contain the specified value(s).
- _.without = restArguments(function(array, otherArrays) {
- return _.difference(array, otherArrays);
- });
+ // 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;
+ };
+ }
- // 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.
- // Aliased as `unique`.
- _.uniq = _.unique = function(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;
+ // Internal list of HTML entities for escaping.
+ var escapeMap = {
+ '&': '&',
+ '<': '<',
+ '>': '>',
+ '"': '"',
+ "'": ''',
+ '`': '`'
};
- // Produce an array that contains the union: each distinct element from all of
- // the passed-in arrays.
- _.union = restArguments(function(arrays) {
- return _.uniq(flatten(arrays, true, true));
- });
-
- // Produce an array that contains every item shared between all the
- // passed-in arrays.
- _.intersection = function(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;
- };
+ // Function for escaping strings to HTML interpolation.
+ var _escape = createEscaper(escapeMap);
- // Take the difference between one array and a number of other arrays.
- // Only the elements present in just the first array will remain.
- _.difference = restArguments(function(array, rest) {
- rest = flatten(rest, true, true);
- return _.filter(array, function(value){
- return !_.contains(rest, value);
- });
- });
+ // Internal list of HTML entities for unescaping.
+ var unescapeMap = invert(escapeMap);
- // Complement of _.zip. Unzip accepts an array of arrays and groups
- // each array's elements on shared indices.
- _.unzip = function(array) {
- var length = array && _.max(array, getLength).length || 0;
- var result = Array(length);
+ // Function for unescaping strings from HTML interpolation.
+ var _unescape = createEscaper(unescapeMap);
- for (var index = 0; index < length; index++) {
- result[index] = _.pluck(array, index);
- }
- return result;
+ // 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
};
- // Zip together multiple lists into a single array -- elements that share
- // an index go together.
- _.zip = restArguments(_.unzip);
+ // 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 = /(.)^/;
- // 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.
- _.object = function(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;
+ // 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'
};
- // Generator function to create the findIndex and findLastIndex functions.
- var createPredicateIndexFinder = function(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;
- };
- };
+ var escapeRegExp = /\\|'|\r|\n|\u2028|\u2029/g;
- // Returns the first index on an array-like that passes a predicate test.
- _.findIndex = createPredicateIndexFinder(1);
- _.findLastIndex = createPredicateIndexFinder(-1);
+ function escapeChar(match) {
+ return '\\' + escapes[match];
+ }
- // Use a comparator function to figure out the smallest index at which
- // an object should be inserted so as to maintain order. Uses binary search.
- _.sortedIndex = function(array, obj, 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;
- };
+ // 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*$/;
- // Generator function to create the indexOf and lastIndexOf functions.
- var createIndexFinder = function(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);
- 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;
+ // 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+='";
}
- 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.
- _.indexOf = createIndexFinder(1, _.findIndex, _.sortedIndex);
- _.lastIndexOf = createIndexFinder(-1, _.findLastIndex);
+ // Adobe VMs need the match returned to produce the correct offset.
+ return match;
+ });
+ source += "';\n";
- // 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).
- _.range = function(start, stop, step) {
- if (stop == null) {
- stop = start || 0;
- start = 0;
- }
- if (!step) {
- step = stop < start ? -1 : 1;
+ 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';
}
- var length = Math.max(Math.ceil((stop - start) / step), 0);
- var range = Array(length);
+ source = "var __t,__p='',__j=Array.prototype.join," +
+ "print=function(){__p+=__j.call(arguments,'');};\n" +
+ source + 'return __p;\n';
- for (var idx = 0; idx < length; idx++, start += step) {
- range[idx] = start;
+ var render;
+ try {
+ render = new Function(argument, '_', source);
+ } catch (e) {
+ e.source = source;
+ throw e;
}
- return range;
- };
+ var template = function(data) {
+ return render.call(this, data, _$1);
+ };
- // Chunk a single array into multiple arrays, each containing `count` or fewer
- // items.
- _.chunk = function(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));
+ // 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;
}
- return result;
- };
+ 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;
+ }
- // Function (ahem) Functions
- // ------------------
+ // Start chaining a wrapped Underscore object.
+ function chain(obj) {
+ var instance = _$1(obj);
+ instance._chain = true;
+ return instance;
+ }
- // Determines whether to execute a function as a constructor
- // or a normal function with the provided arguments.
- var executeBound = function(sourceFunc, boundFunc, context, callingContext, args) {
+ // 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;
+ if (isObject(result)) return result;
return self;
- };
-
- // Create a function bound to a given object (assigning `this`, and arguments,
- // optionally). Delegates to **ECMAScript 5**'s native `Function.bind` if
- // available.
- _.bind = restArguments(function(func, context, args) {
- if (!_.isFunction(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;
- });
+ }
// Partially apply a function by creating a version that has had some of its
- // arguments pre-filled, without changing its dynamic `this` context. _ acts
+ // 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.
- _.partial = restArguments(function(func, boundArgs) {
- var placeholder = _.partial.placeholder;
+ var partial = restArguments(function(func, boundArgs) {
+ var placeholder = partial.placeholder;
var bound = function() {
var position = 0, length = boundArgs.length;
var args = Array(length);
@@ -795,36 +1001,80 @@
return bound;
});
- _.partial.placeholder = _;
+ 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.
- _.bindAll = restArguments(function(obj, keys) {
- keys = flatten(keys, false, false);
+ 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);
+ obj[key] = bind(obj[key], obj);
}
+ return obj;
});
// Memoize an expensive function by storing its results.
- _.memoize = function(func, hasher) {
+ function memoize(func, hasher) {
var memoize = function(key) {
var cache = memoize.cache;
var address = '' + (hasher ? hasher.apply(this, arguments) : key);
- if (!has(cache, address)) cache[address] = func.apply(this, arguments);
+ 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.
- _.delay = restArguments(function(func, wait, args) {
+ var delay = restArguments(function(func, wait, args) {
return setTimeout(function() {
return func.apply(null, args);
}, wait);
@@ -832,29 +1082,29 @@
// Defers a function, scheduling it to run after the current call stack has
// cleared.
- _.defer = _.partial(_.delay, _, 1);
+ 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.
- _.throttle = function(func, wait, options) {
+ 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();
+ 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);
+ var _now = now();
+ if (!previous && options.leading === false) previous = _now;
+ var remaining = wait - (_now - previous);
context = this;
args = arguments;
if (remaining <= 0 || remaining > wait) {
@@ -862,7 +1112,7 @@
clearTimeout(timeout);
timeout = null;
}
- previous = now;
+ previous = _now;
result = func.apply(context, args);
if (!timeout) context = args = null;
} else if (!timeout && options.trailing !== false) {
@@ -875,818 +1125,916 @@
clearTimeout(timeout);
previous = 0;
timeout = context = args = null;
- };
-
- return throttled;
- };
-
- // Returns a function, that, as long as it continues to be invoked, will not
- // be triggered. The function will be called after it stops being called for
- // N milliseconds. If `immediate` is passed, trigger the function on the
- // leading edge, instead of the trailing.
- _.debounce = function(func, wait, immediate) {
- var timeout, result;
-
- var later = function(context, args) {
- timeout = null;
- if (args) result = func.apply(context, args);
- };
-
- var debounced = restArguments(function(args) {
- if (timeout) clearTimeout(timeout);
- if (immediate) {
- var callNow = !timeout;
- timeout = setTimeout(later, wait);
- if (callNow) result = func.apply(this, args);
- } else {
- timeout = _.delay(later, wait, this, args);
- }
-
- return result;
- });
-
- debounced.cancel = function() {
- clearTimeout(timeout);
- timeout = 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.
- _.wrap = function(func, wrapper) {
- return _.partial(wrapper, func);
- };
-
- // Returns a negated version of the passed-in predicate.
- _.negate = function(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.
- _.compose = function() {
- 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.
- _.after = function(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.
- _.before = function(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.
- _.once = _.partial(_.before, 2);
-
- _.restArguments = restArguments;
-
- // Object Functions
- // ----------------
-
- // 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'];
-
- var collectNonEnumProps = function(obj, keys) {
- var nonEnumIdx = nonEnumerableProps.length;
- var constructor = obj.constructor;
- var proto = _.isFunction(constructor) && constructor.prototype || ObjProto;
-
- // Constructor is a special case.
- var prop = 'constructor';
- if (has(obj, prop) && !_.contains(keys, prop)) keys.push(prop);
-
- while (nonEnumIdx--) {
- prop = nonEnumerableProps[nonEnumIdx];
- if (prop in obj && obj[prop] !== proto[prop] && !_.contains(keys, prop)) {
- keys.push(prop);
- }
- }
- };
-
- // Retrieve the names of an object's own properties.
- // Delegates to **ECMAScript 5**'s native `Object.keys`.
- _.keys = function(obj) {
- if (!_.isObject(obj)) return [];
- if (nativeKeys) return nativeKeys(obj);
- var keys = [];
- for (var key in obj) if (has(obj, key)) keys.push(key);
- // Ahem, IE < 9.
- if (hasEnumBug) collectNonEnumProps(obj, keys);
- return keys;
- };
-
- // Retrieve all the property names of an object.
- _.allKeys = function(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;
- };
-
- // Retrieve the values of an object's properties.
- _.values = function(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;
- };
-
- // Returns the results of applying the iteratee to each element of the object.
- // In contrast to _.map it returns an object.
- _.mapObject = function(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;
- };
-
- // Convert an object into a list of `[key, value]` pairs.
- // The opposite of _.object.
- _.pairs = function(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.
- _.invert = function(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.
- // Aliased as `methods`.
- _.functions = _.methods = function(obj) {
- var names = [];
- for (var key in obj) {
- if (_.isFunction(obj[key])) names.push(key);
- }
- return names.sort();
- };
-
- // An internal function for creating assigner functions.
- var createAssigner = function(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).
- _.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)
- _.extendOwn = _.assign = createAssigner(_.keys);
+ return throttled;
+ }
- // Returns the first key on an object that passes a predicate test.
- _.findKey = function(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;
- }
- };
+ // 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;
- // Internal pick helper function to determine if `obj` has key `key`.
- var keyInObj = function(value, key, obj) {
- return key in obj;
- };
+ 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;
+ }
+ };
- // Return a copy of the object only containing the whitelisted properties.
- _.pick = restArguments(function(obj, keys) {
- var result = {}, iteratee = keys[0];
- if (obj == null) return result;
- if (_.isFunction(iteratee)) {
- if (keys.length > 1) iteratee = optimizeCb(iteratee, keys[1]);
- keys = _.allKeys(obj);
- } else {
- iteratee = keyInObj;
- keys = flatten(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;
- });
+ 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;
+ });
- // Return a copy of the object without the blacklisted properties.
- _.omit = restArguments(function(obj, keys) {
- var iteratee = keys[0], context;
- if (_.isFunction(iteratee)) {
- iteratee = _.negate(iteratee);
- if (keys.length > 1) context = keys[1];
- } else {
- keys = _.map(flatten(keys, false, false), String);
- iteratee = function(value, key) {
- return !_.contains(keys, key);
- };
- }
- return _.pick(obj, iteratee, context);
- });
+ debounced.cancel = function() {
+ clearTimeout(timeout);
+ timeout = args = context = null;
+ };
- // Fill in a given object with default properties.
- _.defaults = createAssigner(_.allKeys, true);
+ return debounced;
+ }
- // Creates an object that inherits from the given prototype object.
- // If additional properties are provided then they will be added to the
- // created object.
- _.create = function(prototype, props) {
- var result = baseCreate(prototype);
- if (props) _.extendOwn(result, props);
- return result;
- };
+ // 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);
+ }
- // Create a (shallow-cloned) duplicate of an object.
- _.clone = function(obj) {
- if (!_.isObject(obj)) return obj;
- return _.isArray(obj) ? obj.slice() : _.extend({}, obj);
- };
+ // Returns a negated version of the passed-in predicate.
+ function negate(predicate) {
+ return function() {
+ return !predicate.apply(this, arguments);
+ };
+ }
- // 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.
- _.tap = function(obj, interceptor) {
- interceptor(obj);
- return obj;
- };
+ // 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 whether an object has a given set of `key:value` pairs.
- _.isMatch = function(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;
- };
+ // 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;
+ };
+ }
- // Internal recursive comparison function for `isEqual`.
- var eq, deepEq;
- eq = function(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);
- };
+ // 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);
- // Internal recursive comparison function for `isEqual`.
- deepEq = function(a, b, aStack, bStack) {
- // Unwrap any wrapped objects.
- if (a instanceof _) a = a._wrapped;
- if (b instanceof _) b = b._wrapped;
- // Compare `[[Class]]` names.
- var className = toString.call(a);
- if (className !== toString.call(b)) return false;
- switch (className) {
- // Strings, numbers, regular expressions, dates, and booleans 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);
+ // 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;
}
+ }
- var areArrays = className === '[object Array]';
- 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(aCtor) && aCtor instanceof aCtor &&
- _.isFunction(bCtor) && bCtor instanceof bCtor)
- && ('constructor' in a && 'constructor' in b)) {
- return false;
+ // 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;
}
- }
- // Assume equality for cyclic structures. The algorithm for detecting cyclic
- // structures is adapted from ES 5.1 section 15.12.3, abstract operation `JO`.
+ return -1;
+ };
+ }
- // 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;
- }
+ // Returns the first index on an array-like that passes a truth test.
+ var findIndex = createPredicateIndexFinder(1);
- // Add the first object to the stack of traversed objects.
- aStack.push(a);
- bStack.push(b);
+ // Returns the last index on an array-like that passes a truth test.
+ var findLastIndex = createPredicateIndexFinder(-1);
- // 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;
+ // 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;
}
- } 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(b, key) && eq(a[key], b[key], aStack, bStack))) return false;
+ if (item !== item) {
+ idx = predicateFind(slice.call(array, i, length), isNaN$1);
+ return idx >= 0 ? idx + i : -1;
}
- }
- // Remove the first object from the stack of traversed objects.
- aStack.pop();
- bStack.pop();
- return true;
- };
+ for (idx = dir > 0 ? i : length - 1; idx >= 0 && idx < length; idx += dir) {
+ if (array[idx] === item) return idx;
+ }
+ return -1;
+ };
+ }
- // Perform a deep comparison to check if two objects are equal.
- _.isEqual = function(a, b) {
- return eq(a, b);
- };
+ // 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);
- // Is a given array, string, or object empty?
- // An "empty" object has no enumerable own-properties.
- _.isEmpty = function(obj) {
- if (obj == null) return true;
- if (isArrayLike(obj) && (_.isArray(obj) || _.isString(obj) || _.isArguments(obj))) return obj.length === 0;
- return _.keys(obj).length === 0;
- };
+ // 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);
- // Is a given value a DOM element?
- _.isElement = function(obj) {
- return !!(obj && obj.nodeType === 1);
- };
+ // 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];
+ }
- // Is a given value an array?
- // Delegates to ECMA5's native Array.isArray
- _.isArray = nativeIsArray || function(obj) {
- return toString.call(obj) === '[object Array]';
- };
+ // 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));
+ }
- // Is a given variable an object?
- _.isObject = function(obj) {
- var type = typeof obj;
- return type === 'function' || type === 'object' && !!obj;
- };
+ // 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;
+ }
- // Add some isType methods: isArguments, isFunction, isString, isNumber, isDate, isRegExp, isError, isMap, isWeakMap, isSet, isWeakSet.
- _.each(['Arguments', 'Function', 'String', 'Number', 'Date', 'RegExp', 'Error', 'Symbol', 'Map', 'WeakMap', 'Set', 'WeakSet'], function(name) {
- _['is' + name] = function(obj) {
- return toString.call(obj) === '[object ' + name + ']';
- };
- });
+ // 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;
+ }
- // Define a fallback version of the method in browsers (ahem, IE < 9), where
- // there isn't any inspectable "Arguments" type.
- if (!_.isArguments(arguments)) {
- _.isArguments = function(obj) {
- return has(obj, 'callee');
+ // 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;
};
- }
- // 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;
+ return function(obj, iteratee, memo, context) {
+ var initial = arguments.length >= 3;
+ return reducer(obj, optimizeCb(iteratee, context, 4), memo, initial);
};
}
- // Is a given object a finite number?
- _.isFinite = function(obj) {
- return !_.isSymbol(obj) && isFinite(obj) && !isNaN(parseFloat(obj));
- };
-
- // Is the given value `NaN`?
- _.isNaN = function(obj) {
- return _.isNumber(obj) && isNaN(obj);
- };
+ // **Reduce** builds up a single result from a list of values, aka `inject`,
+ // or `foldl`.
+ var reduce = createReduce(1);
- // Is a given value a boolean?
- _.isBoolean = function(obj) {
- return obj === true || obj === false || toString.call(obj) === '[object Boolean]';
- };
+ // The right-associative version of reduce, also known as `foldr`.
+ var reduceRight = createReduce(-1);
- // Is a given value equal to null?
- _.isNull = function(obj) {
- return obj === null;
- };
+ // 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;
+ }
- // Is a given variable undefined?
- _.isUndefined = function(obj) {
- return obj === void 0;
- };
+ // Return all the elements for which a truth test fails.
+ function reject(obj, predicate, context) {
+ return filter(obj, negate(cb(predicate)), context);
+ }
- // Shortcut function for checking if an object has a given property directly
- // on itself (in other words, not on a prototype).
- _.has = function(obj, path) {
- if (!_.isArray(path)) {
- return has(obj, path);
+ // 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;
}
- var length = path.length;
- for (var i = 0; i < length; i++) {
- var key = path[i];
- if (obj == null || !hasOwnProperty.call(obj, key)) {
- return false;
- }
- obj = obj[key];
+ 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 !!length;
- };
+ return false;
+ }
- // Utility Functions
- // -----------------
+ // 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;
+ }
- // Run Underscore.js in *noConflict* mode, returning the `_` variable to its
- // previous owner. Returns a reference to the Underscore object.
- _.noConflict = function() {
- root._ = previousUnderscore;
- return this;
- };
+ // 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);
+ });
+ });
- // Keep the identity function around for default iteratees.
- _.identity = function(value) {
- return value;
- };
+ // Convenience version of a common use case of `_.map`: fetching a property.
+ function pluck(obj, key) {
+ return map(obj, property(key));
+ }
- // Predicate-generating functions. Often useful outside of Underscore.
- _.constant = function(value) {
- return function() {
- return value;
- };
- };
+ // 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));
+ }
- _.noop = function(){};
+ // 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;
+ }
- // 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 indexes.
- _.property = function(path) {
- if (!_.isArray(path)) {
- return shallowProperty(path);
+ // 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 function(obj) {
- return deepGet(obj, path);
- };
- };
+ return result;
+ }
- // Generates a function for a given object that returns a given property.
- _.propertyOf = function(obj) {
- if (obj == null) {
- return function(){};
+ // 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)];
}
- return function(path) {
- return !_.isArray(path) ? obj[path] : deepGet(obj, path);
- };
- };
+ var sample = isArrayLike(obj) ? clone(obj) : values(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);
+ }
- // Returns a predicate for checking whether an object has a given set of
- // `key:value` pairs.
- _.matcher = _.matches = function(attrs) {
- attrs = _.extendOwn({}, attrs);
- return function(obj) {
- return _.isMatch(obj, attrs);
+ // 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;
};
- };
+ }
- // Run a function **n** times.
- _.times = function(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;
- };
+ // 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];
+ });
- // Return a random integer between min and max (inclusive).
- _.random = function(min, max) {
- if (max == null) {
- max = min;
- min = 0;
- }
- return min + Math.floor(Math.random() * (max - min + 1));
- };
+ // 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;
+ });
- // A (possibly faster) way to get the current timestamp as an integer.
- _.now = Date.now || function() {
- return new Date().getTime();
- };
+ // 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;
+ });
- // List of HTML entities for escaping.
- var escapeMap = {
- '&': '&',
- '<': '<',
- '>': '>',
- '"': '"',
- "'": ''',
- '`': '`'
- };
- var unescapeMap = _.invert(escapeMap);
+ // 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);
+
+ // 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);
+ }
- // Functions for escaping and unescaping strings to/from HTML interpolation.
- var createEscaper = function(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;
- };
- };
- _.escape = createEscaper(escapeMap);
- _.unescape = createEscaper(unescapeMap);
+ // Return the number of elements in a collection.
+ function size(obj) {
+ if (obj == null) return 0;
+ return isArrayLike(obj) ? obj.length : keys(obj).length;
+ }
- // 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.
- _.result = function(obj, path, fallback) {
- if (!_.isArray(path)) path = [path];
- var length = path.length;
- if (!length) {
- return _.isFunction(fallback) ? fallback.call(obj) : fallback;
+ // 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; 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(prop) ? prop.call(obj) : prop;
+ 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 obj;
- };
+ return result;
+ });
- // Generate a unique integer id (unique within the entire client session).
- // Useful for temporary DOM ids.
- var idCounter = 0;
- _.uniqueId = function(prefix) {
- var id = ++idCounter + '';
- return prefix ? prefix + id : id;
- };
+ // 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);
+ });
- // By default, Underscore uses ERB-style template delimiters, change the
- // following template settings to use alternative delimiters.
- _.templateSettings = {
- evaluate: /<%([\s\S]+?)%>/g,
- interpolate: /<%=([\s\S]+?)%>/g,
- escape: /<%-([\s\S]+?)%>/g
- };
+ // 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)));
+ }
- // 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 = /(.)^/;
+ // 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);
+ }
- // 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'
- };
+ // 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);
+ }
- var escapeRegExp = /\\|'|\r|\n|\u2028|\u2029/g;
+ // 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));
+ }
- var escapeChar = function(match) {
- return '\\' + escapes[match];
- };
+ // Trim out all falsy values from an array.
+ function compact(array) {
+ return filter(array, Boolean);
+ }
- // 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.
- _.template = function(text, settings, oldSettings) {
- if (!settings && oldSettings) settings = oldSettings;
- settings = _.defaults({}, settings, _.templateSettings);
+ // 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$1(array, depth, false);
+ }
- // Combine delimiters into one regular expression via alternation.
- var matcher = RegExp([
- (settings.escape || noMatch).source,
- (settings.interpolate || noMatch).source,
- (settings.evaluate || noMatch).source
- ].join('|') + '|$', 'g');
+ // 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);
+ });
+ });
- // 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;
+ // Return a version of the array that does not contain the specified value(s).
+ var without = restArguments(function(array, otherArrays) {
+ return difference(array, otherArrays);
+ });
- 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+='";
+ // 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;
+ }
- // Adobe VMs need the match returned to produce the correct offset.
- return match;
- });
- source += "';\n";
+ // 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));
+ });
- // If a variable is not specified, place data values in local scope.
- if (!settings.variable) source = 'with(obj||{}){\n' + source + '}\n';
+ // 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;
+ }
- source = "var __t,__p='',__j=Array.prototype.join," +
- "print=function(){__p+=__j.call(arguments,'');};\n" +
- source + 'return __p;\n';
+ // 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);
- var render;
- try {
- render = new Function(settings.variable || 'obj', '_', source);
- } catch (e) {
- e.source = source;
- throw e;
+ for (var index = 0; index < length; index++) {
+ result[index] = pluck(array, index);
}
+ return result;
+ }
- var template = function(data) {
- return render.call(this, data, _);
- };
+ // Zip together multiple lists into a single array -- elements that share
+ // an index go together.
+ var zip = restArguments(unzip);
- // Provide the compiled source as a convenience for precompilation.
- var argument = settings.variable || 'obj';
- template.source = 'function(' + argument + '){\n' + source + '}';
+ // 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;
+ }
- return template;
- };
+ // 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;
+ }
- // Add a "chain" function. Start chaining a wrapped Underscore object.
- _.chain = function(obj) {
- var instance = _(obj);
- instance._chain = true;
- return instance;
- };
+ 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;
+ }
- // OOP
- // ---------------
- // If Underscore is called as a function, it returns a wrapped object that
- // can be used OO-style. This wrapper holds altered versions of all the
- // underscore functions. Wrapped objects may be chained.
+ // 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.
- var chainResult = function(instance, obj) {
- return instance._chain ? _(obj).chain() : obj;
- };
+ function chainResult(instance, obj) {
+ return instance._chain ? _$1(obj).chain() : obj;
+ }
// Add your own custom functions to the Underscore object.
- _.mixin = function(obj) {
- _.each(_.functions(obj), function(name) {
- var func = _[name] = obj[name];
- _.prototype[name] = function() {
+ 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(_, args));
+ return chainResult(this, func.apply(_$1, args));
};
});
- return _;
- };
-
- // Add all of the Underscore functions to the wrapper object.
- _.mixin(_);
+ return _$1;
+ }
- // Add all mutator Array functions to the wrapper.
- _.each(['pop', 'push', 'reverse', 'shift', 'sort', 'splice', 'unshift'], function(name) {
+ // Add all mutator `Array` functions to the wrapper.
+ each(['pop', 'push', 'reverse', 'shift', 'sort', 'splice', 'unshift'], function(name) {
var method = ArrayProto[name];
- _.prototype[name] = function() {
+ _$1.prototype[name] = function() {
var obj = this._wrapped;
- method.apply(obj, arguments);
- if ((name === 'shift' || name === 'splice') && obj.length === 0) delete obj[0];
+ 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) {
+ // Add all accessor `Array` functions to the wrapper.
+ each(['concat', 'join', 'slice'], function(name) {
var method = ArrayProto[name];
- _.prototype[name] = function() {
- return chainResult(this, method.apply(this._wrapped, arguments));
+ _$1.prototype[name] = function() {
+ var obj = this._wrapped;
+ if (obj != null) obj = method.apply(obj, arguments);
+ return chainResult(this, obj);
};
});
- // Extracts the result from a wrapped and chained object.
- _.prototype.value = function() {
- return this._wrapped;
- };
-
- // Provide unwrapping proxy for some methods used in engine operations
- // such as arithmetic and JSON stringification.
- _.prototype.valueOf = _.prototype.toJSON = _.prototype.value;
-
- _.prototype.toString = function() {
- return String(this._wrapped);
- };
+ // 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
- // AMD registration happens at the end for compatibility with AMD loaders
- // that may not enforce next-turn semantics on modules. Even though general
- // practice for AMD registration is to be anonymous, underscore registers
- // as a named module because, like jQuery, it is a base library that is
- // popular enough to be bundled in a third party lib, but not be part of
- // an AMD load request. Those cases could generate an error when an
- // anonymous define() is called outside of a loader request.
+ // Add all of the Underscore functions to the wrapper object.
+ _ = mixin(allExports);
+ // Legacy Node.js API.
+ _._ = _;
+ //To support AMD format
if (typeof define == 'function' && define.amd) {
define('underscore', [], function() {
return _;
});
}
-}());
+
+ return _;
+
+}());
\ No newline at end of file