Re: [FWP] Fun With Golf

[Ilmari Karonen <iltzu@sci.fi>]

On Wed, 18 Oct 2000 yanick1@sympatico.ca wrote:
> perlgolf hole - Digital Root
> Write a subroutine to compute the digital root of any whole number argument.
> 
> 	sub hole {pop=~/./;$'?hole($&+$'):$&}

So what's wrong with the arithmetic approach?

  sub hole {$_&&(abs($_)-1)%9+1}

If the numbers were known to be positive, ($_-1)%9+1 would suffice.

-- 
Ilmari Karonen - http://www.sci.fi/~iltzu/
"And, should you resort to sticking a martini olive up their nose,
 implacable universal laws require that they'll _like_ that sort of
 thing."  -- Graydon in r.a.sf.c



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