#!/usr/bin/perl -w
use strict;
use Data::Dump qw(pp);

my ($arrayRef, $hashRef) = makeBothTypes();

sub makeBothTypes
{
    my $rowName = 'A';

    my @twoDarray;
    my %twoDhash;

    while (<DATA>)
    {
        my @row = split;  # no chomp needed for default split
   
        push @twoDarray, \@row;
        $twoDhash{$rowName++} = \@row;
    }
     
    return (\@twoDarray,\%twoDhash);
}


print pp($arrayRef);
print pp($hashRef);
print "\n";

print "$hashRef->{B}[2]\n";   #23
print "$arrayRef->[1][2]\n";  #23

=output that this prints....
[
  [11, 12, 13, 14, 15, 16, 17],
  [21, 22, 23, 24, 25, 26, 27],
  [31, 32, 33, 34, 35, 36, 37],
  [41, 42, 43, 44, 45, 46, 47],
  [51, 52, 53, 54, 55, 56, 57],
]{
  A => [11, 12, 13, 14, 15, 16, 17],
  B => [21, 22, 23, 24, 25, 26, 27],
  C => [31, 32, 33, 34, 35, 36, 37],
  D => [41, 42, 43, 44, 45, 46, 47],
  E => [51, 52, 53, 54, 55, 56, 57],
}
23
23
=cut

__DATA__
11 12 13 14 15 16 17
21 22 23 24 25 26 27
31 32 33 34 35 36 37
41 42 43 44 45 46 47
51 52 53 54 55 56 57