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x/lodash/isWeakSet.js

A modern JavaScript utility library delivering modularity, performance, & extras.
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define(['./isObjectLike'], function(isObjectLike) {
/** `Object#toString` result references. */ var weakSetTag = '[object WeakSet]';
/** Used for built-in method references. */ var objectProto = Object.prototype;
/** * Used to resolve the * [`toStringTag`](http://ecma-international.org/ecma-262/7.0/#sec-object.prototype.tostring) * of values. */ var objectToString = objectProto.toString;
/** * Checks if `value` is classified as a `WeakSet` object. * * @static * @memberOf _ * @since 4.3.0 * @category Lang * @param {*} value The value to check. * @returns {boolean} Returns `true` if `value` is a weak set, else `false`. * @example * * _.isWeakSet(new WeakSet); * // => true * * _.isWeakSet(new Set); * // => false */ function isWeakSet(value) { return isObjectLike(value) && objectToString.call(value) == weakSetTag; }
return isWeakSet;});