I've a simple little script that pads leading '0' characters (max 5 characters) to the last field of a csv file.

I just wondered if this could be turned into a one-liner? 

open FH,"< $ARGV[0]" or die $!;

while (<FH>) {
        my ($pre, $last) = $_ =~ m/(.*),(\w+)/;
        $last = substr(("0" x 5) . $last, -1 * 5, 5);
        print "$pre,$last\n";
}
close FH;

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In reply to one liner? by Anonymous Monk

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