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106 lines
3.5 KiB
JavaScript
106 lines
3.5 KiB
JavaScript
/**
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* lodash 3.0.0 (Custom Build) <https://lodash.com/>
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* Build: `lodash modern modularize exports="npm" -o ./`
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* Copyright 2012-2015 The Dojo Foundation <http://dojofoundation.org/>
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* Based on Underscore.js 1.7.0 <http://underscorejs.org/LICENSE>
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* Copyright 2009-2015 Jeremy Ashkenas, DocumentCloud and Investigative Reporters & Editors
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* Available under MIT license <https://lodash.com/license>
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*/
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var baseIsEqual = require('lodash._baseisequal'),
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bindCallback = require('lodash._bindcallback');
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/**
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* Checks if `value` is suitable for strict equality comparisons, i.e. `===`.
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*
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* @private
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* @param {*} value The value to check.
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* @returns {boolean} Returns `true` if `value` if suitable for strict
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* equality comparisons, else `false`.
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*/
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function isStrictComparable(value) {
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return value === value && (value === 0 ? ((1 / value) > 0) : !isObject(value));
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}
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/**
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* Performs a deep comparison between two values to determine if they are
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* equivalent. If `customizer` is provided it is invoked to compare values.
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* If `customizer` returns `undefined` comparisons are handled by the method
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* instead. The `customizer` is bound to `thisArg` and invoked with three
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* arguments; (value, other [, index|key]).
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*
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* **Note:** This method supports comparing arrays, booleans, `Date` objects,
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* numbers, `Object` objects, regexes, and strings. Objects are compared by
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* their own, not inherited, enumerable properties. Functions and DOM nodes
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* are **not** supported. Provide a customizer function to extend support
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* for comparing other values.
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*
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* @static
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* @memberOf _
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* @category Lang
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* @param {*} value The value to compare.
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* @param {*} other The other value to compare.
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* @param {Function} [customizer] The function to customize comparing values.
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* @param {*} [thisArg] The `this` binding of `customizer`.
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* @returns {boolean} Returns `true` if the values are equivalent, else `false`.
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* @example
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*
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* var object = { 'user': 'fred' };
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* var other = { 'user': 'fred' };
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*
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* object == other;
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* // => false
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*
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* _.isEqual(object, other);
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* // => true
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*
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* // using a customizer callback
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* var array = ['hello', 'goodbye'];
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* var other = ['hi', 'goodbye'];
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*
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* _.isEqual(array, other, function(value, other) {
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* if (_.every([value, other], RegExp.prototype.test, /^h(?:i|ello)$/)) {
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* return true;
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* }
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* });
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* // => true
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*/
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function isEqual(value, other, customizer, thisArg) {
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customizer = typeof customizer == 'function' && bindCallback(customizer, thisArg, 3);
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if (!customizer && isStrictComparable(value) && isStrictComparable(other)) {
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return value === other;
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}
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var result = customizer ? customizer(value, other) : undefined;
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return typeof result == 'undefined' ? baseIsEqual(value, other, customizer) : !!result;
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}
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/**
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* Checks if `value` is the language type of `Object`.
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* (e.g. arrays, functions, objects, regexes, `new Number(0)`, and `new String('')`)
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*
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* **Note:** See the [ES5 spec](https://es5.github.io/#x8) for more details.
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*
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* @static
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* @memberOf _
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* @category Lang
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* @param {*} value The value to check.
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* @returns {boolean} Returns `true` if `value` is an object, else `false`.
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* @example
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*
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* _.isObject({});
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* // => true
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*
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* _.isObject([1, 2, 3]);
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* // => true
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*
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* _.isObject(1);
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* // => false
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*/
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function isObject(value) {
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// Avoid a V8 JIT bug in Chrome 19-20.
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// See https://code.google.com/p/v8/issues/detail?id=2291 for more details.
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var type = typeof value;
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return type == 'function' || (value && type == 'object') || false;
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}
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module.exports = isEqual;
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