I am sorry,I have no idea on what you are saying?

just before your main processing instructions

foreach $key(%my_hash) {
  delete $my_hash{"$key"} if(!exists($my_hash{"$key"}));
}
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that will get rid of empty keys--assuming you're not interested in these--and henceforth you can now iterate over keys of the hash.
the hardest line to type correctly is: stty erase ^H

Unless I'm mistaken, this code won't do anything at all. You're getting each $key directly from the hash, so it's always going to exist. Perhaps you meant if (!defined $my_hash{$key})?

Anyway, checking for defined-ness won't matter either since the "undefined" values are actually empty array refs, which are defined.

#print Dumper( \%Hash_filematches ); -->Shows correct data
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But with the below code,the output is shown below

    print "PRINTING MATCHED HASHES\n";
foreach my $key ( keys %Hash_filematches ) {
    delete $Hash_filematches{"$key"} if(!exists($Hash_filematches{"$ke
+y"}));
        my $value = $Hash_filematches{$key};
        print "$key => $value\n" ;
    }
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This below is the output.It's still printing the array references as values and also the hash keys without values.

PRINTING MATCHED HASHES
array.xml => ARRAY(0x1b26ac8)
file.xml => ARRAY(0x1b26af8)
data.xml=> ARRAY(0x1b26ae0)
multimedia.xml => ARRAY(0x1b26b58
......
......
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