values returns two individual array references, which you can't dereference in one go. You have to iterate over them: 

for my $aref (values %alphabet) {
    say for @$aref;
}

[download]

Also, you probably meant to take references of the arrays only, not of every element used to initialize the hash.   \( ... ) takes references of every element of the (unflattened!) list, so the resulting data structure is 

...
use Data::Dumper;
print Dumper \%alphabet;

[download]
$VAR1 = {
          'SCALAR(0x783790)' => [
                                  '1',
                                  '2',
                                  '3',
                                  '4'
                                ],
          'SCALAR(0x783e50)' => [
                                  '9',
                                  '8',
                                  '7',
                                  '6'
                                ]
        };

[download]

which is probably not what you intended. (The scalar refs are stringified here, because hash keys are always strings in Perl.)

In reply to Re: Dereferencing a Hash of Arrays by Eliya
in thread Dereferencing a Hash of Arrays by toro

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