This is because $a and $b are really $main::a and $main::b. You can solve this in two other ways:

  1. Use prototypes on your sort subs so instead you would have  sub caseless ($$) { lc($_[0]) cmp lc($_[1]) }
  2. Or use the full name of $a and $b like this  sub caseless { lc($main::a) cmp lc($main::b) }

Frank Wiles <frank@wiles.org>
http://www.wiles.org

In reply to Re: sort routines crossing package lines by ides
in thread sort routines crossing package lines by DrWhy

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