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]
Output: 
$ perl 11132513.pl

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

[download]

Hope this helps!


The way forward always starts with a minimal test.

In reply to Re: Creating a Multi Level Hash from CSV by 1nickt
in thread Creating a Multi Level Hash from CSV by workInProgress12

Title:
Use:  <p> text here (a paragraph) </p>
and:  <code> code here </code>
to format your post, it's "PerlMonks-approved HTML":


  • Posts are HTML formatted. Put <p> </p> tags around your paragraphs. Put <code> </code> tags around your code and data!
  • Titles consisting of a single word are discouraged, and in most cases are disallowed outright.
  • Read Where should I post X? if you're not absolutely sure you're posting in the right place.
  • Please read these before you post! —
  • Posts may use any of the Perl Monks Approved HTML tags:
    a, abbr, b, big, blockquote, br, caption, center, col, colgroup, dd, del, details, div, dl, dt, em, font, h1, h2, h3, h4, h5, h6, hr, i, ins, li, ol, p, pre, readmore, small, span, spoiler, strike, strong, sub, summary, sup, table, tbody, td, tfoot, th, thead, tr, tt, u, ul, wbr
  • You may need to use entities for some characters, as follows. (Exception: Within code tags, you can put the characters literally.)
            For:     Use:
    & &amp;
    < &lt;
    > &gt;
    [ &#91;
    ] &#93;
  • Link using PerlMonks shortcuts! What shortcuts can I use for linking?
  • See Writeup Formatting Tips and other pages linked from there for more info.