Sorry about my indention error guys, it made sense to me.

I tested that code Bloodnok Here is what I made it into..

use warnings;
use strict;
use autodie;

open IN, "<baseline_pattern.txt";
binmode IN;
my @content = <IN>;
close IN;

foreach my $num (keys %rec) {
    my @count = ("@content" =~ /$num+/sg);
    open my $fh, ">iterations$num.txt";
    print "$_\n" for @count;
    close $fh;
}
[download]

And here is the error message.

Global symbol "%rec" requires explicit package name at D:\iterations counter.pl

Line 10.

Hmm, methinx I made a bit of a showstopping suggestion ... try - foreach my $num (qw/0 1/) {...
A user level that continues to overstate my experience :-))

Well, now at least I am getting a long list of 1's.

Here is what I am using.

use warnings;
use strict;
use autodie;

open IN, "<D:\\baseline_pattern.txt";
binmode IN;
my @content = <IN>;
close IN;

foreach my $num (qw/0 1/) {
    my @count = ("@content" =~ /$num+/sg);
    open my $fh, ">iterations$num.txt";
    print "$_\n" for @count;
    close $fh;
}
[download]

There are files "D:\iterations_1.txt" and "D:\iterations_0.txt" that I created.

However there was nothing written to these files.

Should there be a sprintf?

Well something is working right because I got no errors.

However, nothing was written to either file.

This is the code now.

use warnings;
use strict;
use autodie;

open IN, "<D:\\baseline_pattern.txt";
binmode IN;
my @content = <IN>;
close IN;

foreach my $num (qw/0 1/) {
    my @count = ("@content" =~ /$num+/sg);
    open my $fh, ">iterations_$num.txt";
    print $fh "$_\n" for @count;
    close $fh;
}
[download]

Should the '>' in front of iterations be a '>>' for appending?

How can I fully qualify where the files are that data should be written?

I can barely make sense of what is going on in this script