19 lines
583 B
JavaScript
19 lines
583 B
JavaScript
'use strict';
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var aSet = require('../internals/a-set');
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var add = require('../internals/set-helpers').add;
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var clone = require('../internals/set-clone');
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var getSetRecord = require('../internals/get-set-record');
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var iterateSimple = require('../internals/iterate-simple');
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// `Set.prototype.union` method
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// https://github.com/tc39/proposal-set-methods
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module.exports = function union(other) {
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var O = aSet(this);
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var keysIter = getSetRecord(other).getIterator();
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var result = clone(O);
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iterateSimple(keysIter, function (it) {
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add(result, it);
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});
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return result;
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};
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