IMO, Data::Diver is definitely the way to go here. No fuss, no muss - just DWIMery. 

use strict;
use warnings;

use Data::Diver qw( DiveVal );
use Data::Dumper;

my $aokeys =
    [
        [ 'a', 'b', 'c' ],
        [ 'a', 'b', 'd' ],
        [ 'b', 'b', 'b' ],
    ];

my $href = {};

foreach my $key_aref ( @$aokeys )
{
    DiveVal( $href, @$key_aref ) = 1;
}

print Dumper $href;

[download]
$VAR1 = {
          'a' => {
                   'b' => {
                            'c' => 1,
                            'd' => 1
                          }
                 },
          'b' => {
                   'b' => {
                            'b' => 1
                          }
                 }
        };

[download]

In reply to Re: How to transform a matrix into a hash?? by bobf
in thread How to transform a matrix into a hash?? by yocoim

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