Nice but not in the gold 
use strict;
use warnings;
use Benchmark qw(:all) ;

my @foo = qw/1 2 3 4 5 6/;
my %bar = (pack('b', @foo) => 'elephants');

my @baz = qw/1 a 4 6 7/;

print $bar{pack('b', @baz)} . "\n";

[download]
Also outputs "elephants".

In reply to Re^2: non-scalar hash key by tweetiepooh
in thread non-scalar hash key by kdejonghe

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