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20 lines
776 B
20 lines
776 B
5 months ago
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'use strict';
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var aSet = require('../internals/a-set');
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var has = require('../internals/set-helpers').has;
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var size = require('../internals/set-size');
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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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var iteratorClose = require('../internals/iterator-close');
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// `Set.prototype.isSupersetOf` method
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// https://tc39.github.io/proposal-set-methods/#Set.prototype.isSupersetOf
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module.exports = function isSupersetOf(other) {
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var O = aSet(this);
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var otherRec = getSetRecord(other);
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if (size(O) < otherRec.size) return false;
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var iterator = otherRec.getIterator();
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return iterateSimple(iterator, function (e) {
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if (!has(O, e)) return iteratorClose(iterator, 'normal', false);
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}) !== false;
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};
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