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- 'use strict';
- var $ = require('../internals/export');
- var aMap = require('../internals/a-map');
- var MapHelpers = require('../internals/map-helpers');
- var get = MapHelpers.get;
- var has = MapHelpers.has;
- var set = MapHelpers.set;
- // `Map.prototype.getOrInsert` method
- // https://github.com/tc39/proposal-upsert
- $({ target: 'Map', proto: true, real: true, forced: true }, {
- getOrInsert: function getOrInsert(key, value) {
- if (has(aMap(this), key)) return get(this, key);
- set(this, key, value);
- return value;
- }
- });
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