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Perl Idioms Explained - !!expr

by broquaint (Abbot)
on Jul 14, 2004 at 12:56 UTC ( [id://374287]=perltutorial: print w/replies, xml ) Need Help??

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  1. or download this
    sub is_in_list {
  return !!grep { $_ eq $_[0] } @_[ 1 .. $#_ ];
...
__output__

baz is in list
  2. or download this
      use Data::Dumper;

...

  $VAR1 = '';
  $VAR1 = '1';

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