http://qs1969.pair.com?node_id=89097


in reply to Re: Re: Re: (Golf) Kaprekar's Process
in thread (Golf) Kaprekar's Process

That's what the sprintf is there for. It formats a two-digit result into a three-digit string, eg. 099. After sorting and reversal, you get 990 - 099.
   MeowChow                                   
               s aamecha.s a..a\u$&owag.print

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Re: Re: Re: Re: Re: (Golf) Kaprekar's Process
by srawls (Friar) on Jun 17, 2001 at 00:57 UTC
    Ok, I get it. I can modify yours than, and improve it by two chars:
    sub a { $_=pop;s/^..$/0$&/;/495/?0:1+a(-($_=join'',sort/./g)+reverse) }

    The 15 year old, freshman programmer,
    Stephen Rawls