Re: swap two integers without using a tmp variable?

From: Richard Herring (junk_at_[127.0.0.1)
Date: 06/22/04 

Date: Tue, 22 Jun 2004 14:03:04 +0100

In message <976e0586.0406220444.4ed62241@posting.google.com>, Steve
<ngsteve@my-deja.com> writes
>The xor solution was really elegant. I would not have thought about it
>and never knew it could be done this way.
> X XOR Y XOR Y = X (assign in y variable, cancel out both Y)
> X XOR Y XOR X = Y (assign in x variable, cancel out both X)

And it DOESN'T WORK (no apologies for shouting) if X and Y are both
references to the same object. Don't do it! 

-- 
Richard Herring

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