Perhaps your array @populations should be a scalar count of however many populations you wish to generate. In your subroutine you can just create your category arrays once and interpolate them into new anonymous arrays for each population. If you take a reference to them as suggested by moritz then each population will have the same individual, chromosome1 and chromosome2 arrays.

use strict;
use warnings;

use Data::Dumper;

my %HoH;
my $popCt = 4;

gener();

print Data::Dumper->Dumpxs([\%HoH], [q{*HoH}]);

sub gener
{
    my @chroma = ( 0...10 );
    my @chromb = ( 0...10 );
    my @ind    = ( 0...10 );

    for my $pop ( 1 .. $popCt )
    {
        $HoH{$pop} =
           {
               individual  => [ @ind ],
               chromasome1 => [ @chroma ],
               chromasome2 => [ @chromb ],
           };
    }
}

[download]

This produces

%HoH = (
         '4' => {
                  'chromasome2' => [
                                     0,
                                     1,
                                     2,
                                     3,
                                     4,
                                     5,
                                     6,
                                     7,
                                     8,
                                     9,
                                     10
                                   ],
                  'chromasome1' => [
                                     0,
                                     1,
                                     2,
                                     3,
                                     4,
                                     5,
                                     6,
                                     7,
                                     8,
                                     9,
                                     10
                                   ],
                  'individual' => [
                                    0,
                                    1,
                                    2,
                                    3,
                                    4,
                                    5,
                                    6,
                                    7,
                                    8,
                                    9,
                                    10
                                  ]
                },
         '1' => {
                  'chromasome2' => [
                                     0,
                                     1,
                                     2,
                                     3,
                                     4,
                                     5,
                                     6,
                                     7,
                                     8,
                                     9,
                                     10
                                   ],
                  'chromasome1' => [
                                     0,
                                     1,
                                     2,
                                     3,
                                     4,
                                     5,
                                     6,
                                     7,
                                     8,
                                     9,
                                     10
                                   ],
                  'individual' => [
                                    0,
                                    1,
                                    2,
                                    3,
                                    4,
                                    5,
                                    6,
                                    7,
                                    8,
                                    9,
                                    10
                                  ]
                },
         '3' => {
                  'chromasome2' => [
                                     0,
                                     1,
                                     2,
                                     3,
                                     4,
                                     5,
                                     6,
                                     7,
                                     8,
                                     9,
                                     10
                                   ],
                  'chromasome1' => [
                                     0,
                                     1,
                                     2,
                                     3,
                                     4,
                                     5,
                                     6,
                                     7,
                                     8,
                                     9,
                                     10
                                   ],
                  'individual' => [
                                    0,
                                    1,
                                    2,
                                    3,
                                    4,
                                    5,
                                    6,
                                    7,
                                    8,
                                    9,
                                    10
                                  ]
                },
         '2' => {
                  'chromasome2' => [
                                     0,
                                     1,
                                     2,
                                     3,
                                     4,
                                     5,
                                     6,
                                     7,
                                     8,
                                     9,
                                     10
                                   ],
                  'chromasome1' => [
                                     0,
                                     1,
                                     2,
                                     3,
                                     4,
                                     5,
                                     6,
                                     7,
                                     8,
                                     9,
                                     10
                                   ],
                  'individual' => [
                                    0,
                                    1,
                                    2,
                                    3,
                                    4,
                                    5,
                                    6,
                                    7,
                                    8,
                                    9,
                                    10
                                  ]
                }
       );

[download]

I hope this is of use.

Cheers,

JohnGG

In reply to Re: Hash of Hash Redux by johngg
in thread Hash of Hash Redux by BioNrd

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