You could sort the keys when you pass them to @sorted_scores, like so:

my @sorted_scores =  sort keys %hashFinal;
[download]

Then as long as:

• You don't add or remove any keys, and
• You sort them again when you map them

..then (I believe) you should be okay.

However, that's still pretty fragile and probably not really recommended.

Cheers,
Darren :)