useful deep/shallow copy/update

Install with component(1):

$ component install muigui/useful-copy

Install with npm:

$ npm install useful-copy

Copies the properties – accessible via Object.keys – from the source Object to the target Object and returns the target Object.

	var copy = require( 'useful-copy' );

    var foo = { one : 1, two : 2, three : 3 },
        bar = copy( {}, foo );

    bar          // returns => { "one" : 1, "two" : 2, "three" : 3 }

    foo === bar  // returns => false

    copy( foo, { three : 3.3, four : 4 }, true ); // returns => { "one" : 1, "two" : 2, "three" : 3, "four" : 4 }

Performs a "deep copy" of all the properties in source to target, so that target does not reference any child Arrays and/ or Objects that belong to source.

Performs a "deep copy" of all the properties in source that are not already contained in target, so that target does not reference any child Arrays and/ or Objects that belong to source.

This works similarly to copy.merge except that existing properties are not overwritten.

(The MIT License)

Copyright (c) 2011 christos "constantology" constandinou http://muigui.com

Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the 'Software'), to deal in the Software without restriction, including without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is furnished to do so, subject to the following conditions:

The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software.

THE SOFTWARE IS PROVIDED 'AS IS', WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.