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Dir : ~/usr/share/node_modules/core-js-pure/modules/

View File Name : esnext.map.update.js

'use strict';
var $ = require('../internals/export');
var call = require('../internals/function-call');
var anObject = require('../internals/an-object');
var aCallable = require('../internals/a-callable');

var $TypeError = TypeError;

// `Set.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 = anObject(this);
    var get = aCallable(map.get);
    var has = aCallable(map.has);
    var set = aCallable(map.set);
    var length = arguments.length;
    aCallable(callback);
    var isPresentInMap = call(has, map, key);
    if (!isPresentInMap && length < 3) {
      throw $TypeError('Updating absent value');
    }
    var value = isPresentInMap ? call(get, map, key) : aCallable(length > 2 ? arguments[2] : undefined)(key, map);
    call(set, map, key, callback(value, key, map));
    return map;
  }
});