calvintychan

// https://medium.com/javascript-scene/master-the-javascript-interview-what-is-a-pure-function-d1c076bec976#.8n6883iyc

// Definition of a pure function
// Given the same inputs, a pure function will always return the same output, 
// regardless of the number of times the function is called. 

// Memorization and pure function goes well togther. Since pure function always return a predicatable value, 
// this value can be cache using memorization.

// Non Pure

calvintychan

/* 
  Resources:
  - https://javascriptweblog.wordpress.com/2010/07/06/function-declarations-vs-function-expressions/
  - http://www.2ality.com/2011/04/ecmascript-5-spec-lexicalenvironment.html
*/

// function declarations uses the VariableEnvironment as scope
function f() {
  return 12;
}

calvintychan

package
{
	import flash.display.Sprite;
	import flash.events.Event;
	import flash.net.*;
	
	public class silk extends Sprite
	{
		public function silk()
		{