Detect File extension from string.

snipped by jspooner

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Static string util that returns the file extension from a string file path. 

/**
* 
* @author Jonathan Spooner
* @version 1.0
*/
package com.jonathanspooner.utils {
	public class StringUtil	{
 
		public static function getExtension(str:String):String {
			return str.slice( (str.lastIndexOf(".")+1), str.length);
		}
 
	}
}