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on this file was 79a0317, checked in by stefan toskovski <stefantoska84@…>, 2 weeks ago |
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File size:
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| 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 MapHelpers = require('../internals/map-helpers');
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| 5 |
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| 6 | var get = MapHelpers.get;
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| 7 | var has = MapHelpers.has;
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| 8 | var set = MapHelpers.set;
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| 9 |
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| 10 | // `Map.prototype.getOrInsert` method
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| 11 | // https://github.com/tc39/proposal-upsert
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| 12 | $({ target: 'Map', proto: true, real: true, forced: true }, {
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| 13 | getOrInsert: function getOrInsert(key, value) {
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| 14 | if (has(aMap(this), key)) return get(this, key);
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| 15 | set(this, key, value);
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| 16 | return value;
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| 17 | }
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| 18 | });
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