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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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