文件操作 - esnext.set.symmetric-difference.js
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文件: /node_modules/core-js/modules/esnext.set.symmetric-difference.js
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'use strict'; var $ = require('../internals/export'); var IS_PURE = require('../internals/is-pure'); var getBuiltIn = require('../internals/get-built-in'); var anObject = require('../internals/an-object'); var aFunction = require('../internals/a-function'); var speciesConstructor = require('../internals/species-constructor'); var iterate = require('../internals/iterate'); // `Set.prototype.symmetricDifference` method // https://github.com/tc39/proposal-set-methods $({ target: 'Set', proto: true, real: true, forced: IS_PURE }, { symmetricDifference: function symmetricDifference(iterable) { var set = anObject(this); var newSet = new (speciesConstructor(set, getBuiltIn('Set')))(set); var remover = aFunction(newSet['delete']); var adder = aFunction(newSet.add); iterate(iterable, function (value) { remover.call(newSet, value) || adder.call(newSet, value); }); return newSet; } });
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