New to perl here and have been trying to figure this one out for a couple days now. I think I need nested forall loops or something along those lines. The task that needs to be done is to assign the columns to a multi level hash. So if my csv file was something like something below. 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. 

header1,header2,header3....
info01,info02,info03...
info11,info12,info13..
  :       :      :

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The hash would look like (with the appropriate brackets) 

$VAR1 = {
          info01 => {
                       info02 => {
                                    info03 => {

         info11 =>  {  
                      info12  => {
                                   info13 => {

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What I have right now: 

#  MODULES
use strict;
use warnings;
use Pod::Usage;
use Data::Dumper;
use Getopt::Long;
use File::Basename;
use Cwd 'abs_path';

use Data::Dumper qw(Dumper);
use Text::CSV;


my $csv = Text::CSV->new({
    binary    => 1, 
    auto_diag => 1, 
    sep_char  => ','
});


my @columns;

open(my $input, '<:utf8',"input.csv") or die;

while (<$input>){
        $csv->parse($_) or die "parse() failed: ";
        my @data = $csv->getline($input);
        
        for my $i (0..$#data) {
               # push @{$columns[$i]}, $data[$i];
               push @{$columns[$i]}, $data[$i];
            


        }
}
close $input;

my %hash = map {shift @$_ => $_} @columns;

use Data::Dumper;
print Dumper(\%hash);

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This is giving me my values all in one line and not how is required

In reply to Creating a Multi Level Hash from CSV by workInProgress12

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