sub commify {
   my $text = reverse $_[0];
   $text =~ s/(\d{3})(?=\d)(?!\d*\.)/$1,/g;
   return scalar reverse $text;
}

[download]
Except that your last line above actually reverses the size, so a file of 180,224 bytes becomes 422,081 bytes when returned from commify(). Easy fix: s/scalar reverse/scalar/

Great tip, and benches a few millis faster in execution time on longer file listings.

In reply to Re: Presenting a local listing of remote files over HTTP by hacker
in thread Presenting a local listing of remote files over HTTP by hacker

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