hey monks!

Say I have two arrays: 
@array1 = [ "test", "test2", "test2", "test3", "test4", "test4" ];
@array2 = [ "test", "test", "test2.1", "test4.1", "test4.2", "test4.3"
+ ];

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How would I go about matching which items in each array could match?
i.e. 
foreach my $item (sort @array1) {
  foreach my $found (@array2) {
    if (&match_names($item,$found)) {
      print "found a match ($item = $found\n";
      push(@save, $found);
    } # end-if
  } # end-foreach
} # end-foreach

foreach my $item (sort @array2) {
  foreach my $found (@array1) {
    if (&match_names($item,$found)) {
      print "found a match ($item = $found\n";
      push(@save, $found);
    } # end-if
  } # end-foreach
} # end-foreach

sub match_names {
  # i have this part, its just a simple regex
  # BUT this must only match in "one direction": test4 matches test 4.
+1, but test4.1 doesnt match test4
  return 1 if ($x =~ /some_regex_on_$y/);
}

[download]
To get the result: 
@save contains [ "test", "test2", "test4", "test4" ];

[download]
because test appears in both arrays once,
the first or second test2 in array1 matches test2.1 in array2
test4 in array1 could match test4.1, test4.2 or test4.3 twice.

Its not the regex matching that I'm having trouble with, its the "duplicate" matches thats stumping me...

At the moment, I'm getting many duplicates for the obvious reason that my code doesnt distinguish if its found a match and ignore it next time round.
Any help would be appreciated.

Cheers,
Reagen

Updated to more accurately present my problem.

In reply to multiple matching in arrays by rsiedl

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