I tested like this:
...
for my $filename (@file) {
  
   #next unless $filename =~ /^\d+/;
   #if(grep { $seen{$_} =~ $filename} keys %seen) { # Failed
   #if(grep { $filename =~ $seen{$_} } keys %seen) { # Failed
   
if(grep { $filename =~ /\Q$_/ } keys %seen) {
     print " YES - $filename\n";
    } else {
      print " NO  - $filename\n";
    }
}

[download]
Why would it only work using "quotemeta"? I even removed the
"next unless $filename =~ /^\d+/;

Thanks for you time!

In reply to Re^4: Compare two arrays by Anonymous Monk
in thread Compare two arrays by Anonymous Monk

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