functions.js

/* This adds two methods first() and last() to Arrays.
*  These methods are used throughout this file, removing
*  them will cause things to break. If these need to be
*  removed you need to replace first() with Array[0] and last
*  with Array[array.length - 1]
*/
Array.prototype.first = function () { return this[0]; };
Array.prototype.last  = function () { return this[this.length - 1]; };

/* This adds a method to String objects that allows you to test
*  whether or not a certain character or string exists in a target
*  string. In raw JS you need to check for .indexOf("test") !== -1
*/
String.prototype.contains = function( it ) { return this.indexOf( it ) !== -1; };