I didn't like like a number of points of style in your code, so I fiddled with it. There are more changes than I feel like listing, but you can tell what they are yourself. So I'll just show my changed (not necessarily improved) version and you can decide if it's an (?:dis)?improvement. 
#!perl -w
use strict;

unless (@ARGV==2) {
    die <<EOF;
$0 strips comment lines beginning with # from perl code

usage: $0 infile outfile

       set outfile to \"display\" to just show result
EOF
}

my $infile = shift;
my $outfile = shift;

my $full_code = '';
my $bad_lines = 0;
my $good_lines = 0;

open(IN,"< $infile") or die "Can't open $infile: $!\n";
while (<IN>) {
   if ( /^\s*#[^!]/ ) {        # if comment line
      $bad_lines++;
   }
   else {
      $good_lines++;
      $full_code .= $_;        # add to code
   }
}
close(IN) or die "Can't close $infile: $!\n";

if ($outfile eq 'display') {
   print $full_code;
}
else {
   open(OUT,"> $outfile") or die "Can't write to $outfile: $!\n";
   print OUT $full_code;
   close(OUT) or die "Can't close $outfile: $!";
}

print ($good_lines+$bad_lines) . "lines read from $infile\n",
    "$bad_lines comment lines detected in $infile\n",
    "$good_lines lines written to $outfile\n";

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In reply to Re: strip perl comment lines by repson
in thread strip perl comment lines by epoptai

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