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    HOW TO: Randomize/Shuffle an array in Flash (AS2)

    January 30, 2010
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    I was creating a logo scroller in flash when a client of mine asked me if the logo’s could show up in a random order. This lead me to look to see if Actionscript 2.0 has a built in function to randomize an array. Well, I didn’t find a built in funciton, but i found a great blog entry describing how to build you own. The following code snippets come from:

    http://mrsteel.wordpress.com/2007/06/15/randomize-array-shuffle-an-array-in-flash/

    Prototype function and return function code is :

    Code
    1. Array.prototype.mixElements = function() {
    2.  var _length:Number = this.length, rn:Number, it:Number, el:Object;
    3.  for (it = 0; it<_length; it++) {
    4.  el = this[it];
    5.  this[it] = this[rn = random(_length)];
    6.  this[rn] = el;
    7.  }
    8. }
    Code
    1. function mixArray(array:Array):Array {
    2.  var _length:Number = array.length, mixed:Array = array.slice(), rn:Number, it:Number, el:Object;
    3.  for (it = 0; it<_length; it++) {
    4.  el = mixed[it];
    5.  mixed[it] = mixed[rn = random(_length)];
    6.  mixed[rn] = el;
    7.  }
    8.  return mixed;
    9.  }
    10.  

    Flash Programming - AS2