main
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Last change
on this file was d24f17c, checked in by Aleksandar Panovski <apano77@…>, 15 months ago |
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Initial commit
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File size:
510 bytes
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| [d24f17c] | 1 | 'use strict';
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| 2 | var $ = require('../internals/export');
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| 3 | var aMap = require('../internals/a-map');
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| 4 | var iterate = require('../internals/map-iterate');
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| 5 |
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| 6 | // `Map.prototype.keyOf` method
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| 7 | // https://github.com/tc39/proposal-collection-methods
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| 8 | $({ target: 'Map', proto: true, real: true, forced: true }, {
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| 9 | keyOf: function keyOf(searchElement) {
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| 10 | var result = iterate(aMap(this), function (value, key) {
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| 11 | if (value === searchElement) return { key: key };
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| 12 | }, true);
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| 13 | return result && result.key;
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| 14 | }
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| 15 | });
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