I'm not really following what you are trying to do, but it sounds to me like you need either a Hash of Arrays or an Array of Hashes (where the hashes are a single key => value pair and the value is your array) if you need to preserve order.

#!/usr/bin/perl -l

use strict;
use warnings;

my %unordered = (
    foo => [qw(foo baz baz)],
    bar => [0 .. 9],
);

print for @{ $unordered{foo} };


print "--------";

my @ordered = (
    { foo => [qw(foo baz baz)] },
    { bar => [0 .. 9] },
);

print for @{ $ordered[1]->{bar} };
[download]

L-LL-L--L-LL-L--L-LL-L--
-R--R-RR-R--R-RR-R--R-RR
B--B--B--B--B--B--B--B--
H---H---H---H---H---H---
(the triplet paradiddle with high-hat)