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