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Remove duplicates from Array

/ Published in: ActionScript 3
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  1. // removes all duplicate items from an array
  2.  
  3. /**
  4. * @method removeDuplicates
  5. * @description removes duplicate items from the array
  6. * @param haystack:Array - the array from which to remove any duplicates
  7. */
  8. public static function removeDuplicates(haystack:Array):Array{
  9.  
  10. 	var dict:Dictionary = new Dictionary( true );
  11. 	var output:Array = new Array( );
  12. 	var item:*;
  13. 	var total:int = haystack.length;
  14. 	var pointer:int = 0;
  15. 	for(pointer; pointer < total ; pointer++) {
  16. 		item = haystack[pointer];
  17. 		if(dict[item] == undefined) {
  18. 			output.push( item );
  19. 			dict[item] = true;
  20. 		}
  21. 	}
  22. 	return output;     
  23. }

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