Dear Masters,
I have a simple array which I want to print the adjacent element together. But my script below doesn't seem to do the job: 
# Number of elements in the array are always EVEN
my @arr = qw (J K L M N O);
my %done;

OUT:
foreach my $elem(@arr) {

   IN:
   foreach my $elem2(@arr) {
   
      next IN if ($elem eq $elem2);
      next IN if ($done{$elem2." - ". $elem});

      print "$elem - $elem2\n";
      
      $done{$elem." - ".$elem2} = 1;

    }
 
}

[download]
It somehow doesn't print the desired result like this: 
J - K
L - M
N - O

[download]
What's wrong with my script above?

---
neversaint and everlastingly indebted.......

In reply to Adjacent Looping by neversaint

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