Global variables in Node.js

http://www.hacksparrow.com/global-variables-in-node-js.html

Binding in JavaScript

https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Function/bind?redirectlocale=en-US&redirectslug=JavaScript%2FReference%2FGlobal_Objects%2FFunction%2Fbind

Great articles

http://www.devign.me/javascript-this-keyword/

http://snook.ca/archives/javascript/javascript_pass

Great article for how values are passed in JavaScript

http://stackoverflow.com/questions/518000/is-javascript-a-pass-by-reference-or-pass-by-value-language