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Wrong idioms

by McA (Curate)
on Mar 29, 2013 at 19:56 UTC ( #1026189=perlquestion: print w/ replies, xml ) Need Help??

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  1. or download this
    sub readfile {
        my $filename = shift or return;
        ...
    }
    
  2. or download this
    my $filename = shift;
    return unless(defined $filename && $filename ne '');
    
  3. or download this
    my $filename = shift or return;
    

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