'use strict';
|
var $ = require('../internals/export');
|
var aCallable = require('../internals/a-callable');
|
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.getOrInsertComputed` method
|
// https://github.com/tc39/proposal-upsert
|
$({ target: 'Map', proto: true, real: true, forced: true }, {
|
getOrInsertComputed: function getOrInsertComputed(key, callbackfn) {
|
aMap(this);
|
aCallable(callbackfn);
|
if (has(this, key)) return get(this, key);
|
// CanonicalizeKeyedCollectionKey
|
if (key === 0 && 1 / key === -Infinity) key = 0;
|
var value = callbackfn(key);
|
set(this, key, value);
|
return value;
|
}
|
});
|
