SPUG: Loop styles: goto vs. redo

[Richard Anderson]

----- Original Message -----
From: <dleonard at dleonard.net>
To: <spug-list at pm.org>
Sent: Tuesday, July 02, 2002 2:37 PM
Subject: Re: SPUG: Loop styles: goto vs. redo
>
> Personally I'm more of a fan of while().
>
> my $done = 0;
> while (!$done) {
>  for (...) {
>   if (...) {
>    $done = 1;
>   }
>  }
> }
>

This repeats UNLESS the conditional evaluates true.  This is not equivalent
to the original loop, which repeats IF the conditional evaluates true:

START_TESTS:
    my $not_done = 0;
    for (...) {
        unless (...) {
            ...
            $not_done = 1;
        }
    }
    goto START_TESTS if $not_done

Cheers,
Richard
richard at richard-anderson.org
www.richard-anderson.org
www.raycosoft.com



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