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What does 'next if $hash{$elem}++;' mean?

by Win (Novice)
on Feb 17, 2006 at 15:21 UTC ( [id://530966]=perlquestion: print w/replies, xml ) Need Help??

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  1. or download this
    next if $seen{ $elem }++;
  2. or download this
     my %hash   = map { $_, 1 } @array;

...
     next if $seen{ $elem }++;
     push @unique, $elem;
   }

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