if (ref($item) =~ /HASH/) {}

##</code><code>##

print "Array in Array: ", @{$item}, "\n";
...
print "Hash in Array: ", %{$item}, "\n";

##</code><code>##

#!/usr/bin/perl -w

use strict;
$, = " ";

my %Volume_Info = ( alpha => [ 0, 512, 1048576, 1,
                               { one => 'first_hash' },
                               [ 'two', 'first_array' ],
                               { three => 'second_hash' },
                               -1, 0, 0, 0, 0, 0, 'zfod', 0 ],
                    beta  => [ 1, 2, 3,
                               { four => 'third_hash' },
                               2, 1 ] );

for my $vol_key ( sort keys %Volume_Info ) {
        print "\nVolume: $vol_key\n";
        foreach my $item ( @{ $Volume_Info{$vol_key}} ) {
            if (ref($item) =~ /ARRAY/) {
                print "Array in Array item: ", @{$item}, "\n";
            } elsif (ref($item) =~ /HASH/) {
                print "Hash in Array: ", %{$item}, "\n";
            } else {
                print "Array Item: $item \n";
            }
        }
    }

##</code><code>##

Volume: alpha
Array Item: 0 
Array Item: 512 
Array Item: 1048576 
Array Item: 1 
Hash in Array:  one first_hash 
Array in Array item:  two first_array 
Hash in Array:  three second_hash 
Array Item: -1 
Array Item: 0 
Array Item: 0 
Array Item: 0 
Array Item: 0 
Array Item: 0 
Array Item: zfod 
Array Item: 0 

Volume: beta
Array Item: 1 
Array Item: 2 
Array Item: 3 
Hash in Array:  four third_hash 
Array Item: 2 
Array Item: 1