Hi,

Important to note that there are repeated values, which is the case for the provided sample output, (ie info 01 = info11, info02 = info12, etc.), but this is not always the case.

Although your sample data does not correspond with this comment, you should consider that hashes have unique keys.

use strict;
use warnings;
use feature 'say';
use Data::Dumper;

my %hash;

while (<DATA>) {
    chomp;
    my @items = split ',';
    $hash{ $items[0] } = $items[1];
}

say Dumper \%hash;

__DATA__
a,b
a,c
x,y
[download]

$ perl 11132513.pl

$VAR1 = {
          'a' => 'c',
          'x' => 'y'
        };
[download]

Hope this helps!