The first step in the process is to parse the the CSV. This is best done with a module such as Text::xSV.

Then, you need to figure out how to differentiate titles from other fields. It isn't apparent from your post, so I cannot help you there.

Finally, populate the hash. A most simple-minded solution would be to create a case structure: 

my @titles = ...; 
if (@titles == 1) {
   $BIGLIST{$title[0]} = [ @RESTOFFIELDS ];
}
elsif (@titles == 2) {
   $BIGLIST{$title[0]}{$titles[1]} = [ @RESTOFFIELDS ];
}
...etc.

[download]
This works is you have some small upper bound of titles. If not, you will need a loop that walks the @title array (untested): 
my @titles = ...; 
my $ref = \%BIGLIST;
while (@titles > 1) {
   my $title = shift @titles;
   $ref = \($ref->{$title});
}
$ref->{$title[0]} =  [ @RESTOFFIELDS ];

[download]

-Mark

In reply to Re: Creating Hash of hash of hash dynamically by kvale
in thread Creating Hash of hash of hash dynamically by rjc

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.