I can't quite grok your question, but it sounds like you want to know the "intersection" of 2 arrays.

From perldoc -q intersection: 

Found in /usr/lib/perl5/5.6.1/pods/perlfaq4.pod
How do I compute the difference of two arrays?  How do I
compute the intersection of two arrays?

Use a hash.  Here's code to do both and more.  It assumes
that each element is unique in a given array:

@union = @intersection = @difference = ();
%count = ();
foreach $element (@array1, @array2) { $count{$element}++ }
foreach $element (keys %count) {
   push @union, $element;
   push @{ $count{$element} > 1 ? \@intersection : \@difference },
   $element;
}

Note that this is the symmetric difference, that is, all
elements in either A or in B but not in both.  Think of it
as an xor operation.

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In reply to Re: See if arrays match by kschwab
in thread See if arrays match by Anonymous Monk

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