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23 lines
895 B
23 lines
895 B
'use strict'; |
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var $ = require('../internals/export'); |
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var IS_PURE = require('../internals/is-pure'); |
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var getBuiltIn = require('../internals/get-built-in'); |
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var anObject = require('../internals/an-object'); |
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var aFunction = require('../internals/a-function'); |
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var speciesConstructor = require('../internals/species-constructor'); |
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var iterate = require('../internals/iterate'); |
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// `Set.prototype.intersection` method |
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// https://github.com/tc39/proposal-set-methods |
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$({ target: 'Set', proto: true, real: true, forced: IS_PURE }, { |
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intersection: function intersection(iterable) { |
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var set = anObject(this); |
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var newSet = new (speciesConstructor(set, getBuiltIn('Set')))(); |
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var hasCheck = aFunction(set.has); |
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var adder = aFunction(newSet.add); |
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iterate(iterable, function (value) { |
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if (hasCheck.call(set, value)) adder.call(newSet, value); |
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}); |
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return newSet; |
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} |
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});
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