Re: swapping two numbers

On Jun 23, 2006, at 5:01 PM, David Westbrook wrote:

> Michael R. Wolf wrote:
>
> not in-place cause it's 3 lines, but does not use an external  
> temporay value, and should be language-independent:
>  x = x + y
>  y = x - y
>  x = x - y
> (IIRC my high school BASIC teacher taught us that)

This works:
       $a -= $b = ($a += $b) - $b;

Chris
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