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Last change
on this file since 79a0317 was 79a0317, checked in by stefan toskovski <stefantoska84@…>, 3 days ago |
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F4 Finalna Verzija
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File size:
704 bytes
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| 1 | 'use strict';
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| 2 | var $ = require('../internals/export');
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| 3 | var bind = require('../internals/function-bind-context');
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| 4 | var aMap = require('../internals/a-map');
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| 5 | var iterate = require('../internals/map-iterate');
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| 6 |
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| 7 | // `Map.prototype.findKey` method
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| 8 | // https://github.com/tc39/proposal-collection-methods
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| 9 | $({ target: 'Map', proto: true, real: true, forced: true }, {
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| 10 | findKey: function findKey(callbackfn /* , thisArg */) {
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| 11 | var map = aMap(this);
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| 12 | var boundFunction = bind(callbackfn, arguments.length > 1 ? arguments[1] : undefined);
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| 13 | var result = iterate(map, function (value, key) {
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| 14 | if (boundFunction(value, key, map)) return { key: key };
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| 15 | }, true);
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| 16 | return result && result.key;
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| 17 | }
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| 18 | });
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