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20 lines
740 B
JavaScript
20 lines
740 B
JavaScript
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'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.union` 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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union: function union(iterable) {
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var set = anObject(this);
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var newSet = new (speciesConstructor(set, getBuiltIn('Set')))(set);
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iterate(iterable, aFunction(newSet.add), newSet);
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return newSet;
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}
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});
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