I don't know if it is the original that you refer to but here is a obfu/joke node from 2002 where I use this technique: Power Twool. 
    sub powa2 
    {
    ;      local %_ = @_
    ;      keys  %_ = pop
    ;      $_ =  %_
    ;      split '\/'
    ;      pop
    }

[download]

--
John.

In reply to Re: next power of two by jmcnamara
in thread next power of two by dk

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