Thanks for the explanation. I wasn't getting his solution at first until I saw your description of the steps. For those who need a little more (as I did): perlpacktut. It's funny, I'm sure we've all read that document numerous times, and yet before this I never noticed the % feature.

Update: Fixed perlunpacktut: sb perlpacktut.

Dave

In reply to Re^3: Efficient bit counting with a twist. by davido
in thread Efficient bit counting with a twist. by BrowserUk

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