+++ /dev/null
-'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;
- }
-});