I think I figured out what you're trying to do here. If I'm off a bit, try to use this as a base to build from. You might want to take a look at perlref, perlreftut, and perldsc to learn more about references and complex data structures.

The example below should get you started. Since it appears you want to use a subroutine to add the array to the hash, I've coded it that way.

HTH

use strict;
use warnings;
use Data::Dumper;

my %hash;

my @array1 = qw( one two three );
my @array2 = qw( four five six );
my @array3 = qw( seven eight nine );

add_arrayref_to_hashref( \@array1, \%hash, 'key1' );
print "\nafter adding array1 using key1:\n", Dumper( \%hash );

add_arrayref_to_hashref( \@array2, \%hash, 'key1' );
print "\nafter adding array2 using key1:\n", Dumper( \%hash );

# getting a bit fancier here...
my $array3ref = \@array3;
add_arrayref_to_hashref( $array3ref, \%hash, ${ $array3ref }[1] );
print "\nafter adding array3 using ${ $array3ref }[1]:\n", Dumper( \%h
+ash );

sub add_arrayref_to_hashref
{
    my ( $arrayref, $hashref, $key ) = @_;

    push( @{ ${ $hashref }{$key} }, $arrayref );
}
[download]

OUTPUT:

after adding array1 using key1:
$VAR1 = {
          'key1' => [
                      [
                        'one',
                        'two',
                        'three'
                      ]
                    ]
        };

after adding array2 using key1:
$VAR1 = {
          'key1' => [
                      [
                        'one',
                        'two',
                        'three'
                      ],
                      [
                        'four',
                        'five',
                        'six'
                      ]
                    ]
        };

after adding array3 using eight:
$VAR1 = {
          'key1' => [
                      [
                        'one',
                        'two',
                        'three'
                      ],
                      [
                        'four',
                        'five',
                        'six'
                      ]
                    ],
          'eight' => [
                       [
                         'seven',
                         'eight',
                         'nine'
                       ]
                     ]
        };
[download]

Update: Ack! I see davidj posted a very similar response while I was composing mine. His uses a slice with your actual data, while mine is more of a general example. Use whichever helps, and enjoy using refs! Extra credit: Instead of passing 3 arguments, you could eliminate the key and simply pass references to the hashref and the desired arrayref, but I'll leave that as an exercise for the reader...

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