EVOLUTION-MANAGER

Edit File: map.js

var _ = require('underscore'); /* * map.js * * Copyright (C) 2009-13 by RStudio, Inc. * * This program is licensed to you under the terms of version 3 of the * GNU Affero General Public License. This program is distributed WITHOUT * ANY EXPRESS OR IMPLIED WARRANTY, INCLUDING THOSE OF NON-INFRINGEMENT, * MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE. Please refer to the * AGPL (http://www.gnu.org/licenses/agpl-3.0.txt) for more details. * */ exports.create = create; /** * Create a map (similar to {} but without the problems described in * http://www.devthought.com/2012/01/18/an-object-is-not-a-hash/). */ function create() { return Object.create(null); } exports.compact = compact; /** * Return a copy of object x with null or undefined "own" properties removed. */ function compact(x) { function shouldDrop(key) { return typeof(x[key]) === 'undefined' || x[key] === null; } return _.omit(x, _.filter(_.keys(x), shouldDrop)) }