- You might want to use "use warnings" instead of "-w", so that you can remove warning using "no warnings" pargma, where you wouldn't want some.
- Always check the return for the open function like so: open $fh,'<',$filename or die "can't open file: $!" OR you use use autodie qw(open close);
- The File handler $fh decleared was not used
- filehandle $fh was not close. You should do that like so:close $fh or die "can't close file:$!"
You really might what to try out the module "perlcritic", based on Damian Conway's book Perl Best Practices. Check Perlcritic
Using it from Command Line Interface like so:perlcritic -3 perlscript.pl
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