I am now stopped with my new test to implement new learnings...I read and reviewed other code and still lost...maybe I need a break or think of a better test prog to try out skills

need help here with doing a proper sub routine check on the values of a hash ref. while using the <=>

IF the value = value1 then print out to file

IF value of either is not the same then print those to a file

1 = 1
2 = 2
3 = 3
4 = 4
5 = 5
[download]

1 = 2
2 = 2
3 = 4
4 = 7
5 = 5
6 = 6
[download]

use strict;
use warnings;
use autodie;
use diagnostics;
use Data::Dump qw(dump);
my %seen;

open my $in,'<','./Test_Data.txt';

while(<$in>){
     my ($key,$value)= split /[\s=\s]+/; 
    $seen{$key}[0]=$value; 
    }
close $in;

#using ONE hashes to check key

open my $in1,'<','./Test_Data1.txt';

while(<$in1>){
    my ($key,$value)= split /[\s=\s]+/; 
    $seen{$key}[1]=$value if (exists $seen{$key});
}     
close $in1;
#dump \%seen;

#section uses as follows: ? conditional to write on different output f
+iles
#also, 1st sub to written by me... to check the values 

open my $out,'>','./OUT_test_data_keys_and_sorted_values_match.txt';
open my $out1,'>','./OUT_test_data_No_values_matched.txt';
foreach my $key ( sort { check_values()} keys %seen){
    if ($key){
        my $fh = defined $seen{$key}[0] && 
        defined $seen{$key}[1] ? $out:$out1;
        print $fh "$key => ",join(',',@{$seen{$key}}),"\n";
        }
    }
close $out;
close $out1;

#here is first SUBROUTINE checks that value [0] == value[1]
#my %number;

sub check_values{
    for my $key (sort {$a<=>$b} keys %seen){
        #don't know how ,where to get valueat [0],value at[1] from??wh
+o has the values? what is really (a and b) in, is it $_ or %seen? wha
+t am I really evaluating with,is it like this: $seen{$key}[0]=$a or $
+seen{$key}[1]=$b...completely lost...
        }
[download]

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