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$code     = reference to an array holding identifiers
$hashhash = reference to a hash

$hashhash = {
             'identifier' => {'score'       => 7,
                              'query_start' => 80,
...
                             },
             'identifier' => {...}
            }

if ($hashhash->{$codes->[$x]}->{'defline'} =~ m/NP_/) {
   do_something;
}

Can't use string ("description") as an ARRAY ref while
        "strict refs" in use at /home/spitzem/wp/retr_standaloneblast_
+ABCGfam.pl line 589 (#1)
    (F) Only hard references are allowed by "strict refs".  Symbolic
    references are disallowed.  See perlref.