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'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 $TypeError = TypeError;
var get = MapHelpers.get;
var has = MapHelpers.has;
var set = MapHelpers.set;
// `Map.prototype.update` method
// https://github.com/tc39/proposal-collection-methods
$({ target: 'Map', proto: true, real: true, forced: true }, {
update: function update(key, callback /* , thunk */) {
var map = aMap(this);
var length = arguments.length;
aCallable(callback);
var isPresentInMap = has(map, key);
if (!isPresentInMap && length < 3) {
throw new $TypeError('Updating absent value');
}
var value = isPresentInMap ? get(map, key) : aCallable(length > 2 ? arguments[2] : undefined)(key, map);
set(map, key, callback(value, key, map));
return map;
}
});