in reply to Re: unless versus if ( ! ) inside a subroutine
in thread unless versus if ( ! ) inside a subroutine

If we change 
if ( ! $v ) { # ...

[download]
to 
if ( $v ) { # ...

[download]
It still returns nothing. So it appears with 'if', it does not return the value evaluated inside the conditional. But why?

Replies are listed 'Best First'.
Re^3: unless versus if ( ! ) inside a subroutine
by Anonymous Monk on Jan 15, 2008 at 17:06 UTC
    How about trying explicit returns? 
    sub testUnless {
     my $v = 'Navidson';
     unless ( $v ) {
          return undef;
     }
     else {
          return $v;
     }
}
sub testIfNot {
     my $v = 'Holloway';
     if (!$v) {
          return undef;
     }
     else {
          return $v;
     }
}

    [download]
    You have to understand that Perl will return the last evalution from a sub if you are not explicit. So start being explicit!
[reply]
[d/l]
      The question is not on recommended practices to fix a problem but rather the perl internals regarding if and unless.
[reply]
      A reply falls below the community's threshold of quality. You may see it by logging in.

In Section Seekers of Perl Wisdom