Just as a fun thing to do, I decided to make a command line program that will number each line in a file (don't ask why -- I just decided to do it ;)). So given the contents:

alpha
bravo
charlie
delta

The program would make that:

1. alpha
2. bravo
3. charlie
4. delta

The way I have it right now, the contents will turn into:

alpha
bravo
charlie
delta1. 2. 3. 4.

Can't seem to make the numbers append to the start of each file *lol*. So here is my code: 
#!/usr/bin/perl
use strict;

#command line info
my $usage = "$0 -file [file name]";
die "Usage: $usage \n"; if ((@ARGV == 0) || ((scalar @ARGV)%2 != 0));
my %CommandLine = @ARGV;
my $file = $CommandLine(-file) || die "Usage: $Usage \n";
#end command line info

print "Status: numbering each line in file \"$file\".\n";

&number;

print "\nStatus: done numbering each line in file \"$file\".\n";

## SUBROUTINE

sub number {
     my $count;
open(FILE, "$file") || die "Can't locate file \"$file\": $!";
          my @file = <FILE>; # store contents of file into @file
     close FILE;
     open(FILE, ">>$file") || die "Can't locate file \"$file\": $!";
          foreach my $line (@file) {
               (undef) = <FILE>; # stores number of lines into $.
               $count++;
               print FILE, "$count. ";
               if ($count == $.) {
                    last;
               }
          }
          close FILE;
}

[download]
Any suggestions on either making this code cleaner and/or making it work properly? (keep in mind that this was a trial and error thing on my part -- reading the lines in the file -- so I am unsure if there is a more effective way)

Also, I had to re-type this from the editor, as it isn't coppying properly -- if you see a typo, that is why.

In reply to Append to beginning of line (multi line file) by FireBird34

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