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Swapping of two numbers without using a third variable

/ Published in: ActionScript 3
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Looking forward for the most optimized solution for the same

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  1. <?xml version="1.0" encoding="utf-8"?>
  2. <mx:Application xmlns:mx="http://www.adobe.com/2006/mxml" layout="absolute" creationComplete="init()">
  3. 	<mx:Script>
  4. 		<![CDATA[
  5. 			public function init():void{
  6. 				var a:Number = 5;
  7. 				var b:Number = 6;
  8.  
  9. 				// solution 2 : using xor
  10. 				a = a^b; // a = 1^2 = 1
  11. 				b = a^b; // b = 1^2 = 1
  12. 				a = a^b; // a = 1^1 = 1
  13. 				txt.text ="\n XOR Method >>> a: "+a+" b: "+b; 
  14.  
  15. 				// solution 1
  16. 				a=a+b; // a = 1+2 = 3
  17. 				b=a-b; // b = a-b = 3-2 = 1
  18. 				a=a-b; // a = 3-1 = 2
  19. 				txt.text += "\n Solution 1 >>> a: "+a+" b: "+b;
  20.  
  21. 				// solution 3
  22. 				a=a*b;
  23. 				b=a/b;
  24. 				a=a/b;
  25. 				txt.text +="\n Solution 3 >>> a: "+a+" b: "+b; 				
  26. 			} 
  27. 		]]>
  28. 	</mx:Script>
  29. 	<mx:TextArea x="118" y="57" width="553" height="412" id="txt"/>
  30. </mx:Application>

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