mirror of
https://github.com/idanoo/GoScrobble.git
synced 2024-11-25 09:55:15 +00:00
23 lines
815 B
JavaScript
23 lines
815 B
JavaScript
|
'use strict';
|
||
|
|
var $ = require('../internals/export');
|
||
|
|
var IS_PURE = require('../internals/is-pure');
|
||
|
|
var anObject = require('../internals/an-object');
|
||
|
|
var aFunction = require('../internals/a-function');
|
||
|
|
|
||
|
|
// `Set.prototype.update` method
|
||
|
|
// https://github.com/tc39/proposal-collection-methods
|
||
|
|
$({ target: 'Map', proto: true, real: true, forced: IS_PURE }, {
|
||
|
|
update: function update(key, callback /* , thunk */) {
|
||
|
|
var map = anObject(this);
|
||
|
|
var length = arguments.length;
|
||
|
|
aFunction(callback);
|
||
|
|
var isPresentInMap = map.has(key);
|
||
|
|
if (!isPresentInMap && length < 3) {
|
||
|
|
throw TypeError('Updating absent value');
|
||
|
|
}
|
||
|
|
var value = isPresentInMap ? map.get(key) : aFunction(length > 2 ? arguments[2] : undefined)(key, map);
|
||
|
|
map.set(key, callback(value, key, map));
|
||
|
|
return map;
|
||
|
|
}
|
||
|
|
});
|