If the user ID is numeric, starting at or near zero, and will only be incrementing, why not use an array instead? Don't use a hash unless you need to be able to store more complex information in the hash key (like a string), or if you're using numbers, if the numbers are from a random distribution (as an array will create elements to fill in the gaps). That way the array is immediately "sorted", to make it descending, just reverse it, and things are much easier to deal with.

If you have a legitimate need to use hashes in this case, just use sort against the hash keys: 

@descending_keys = sort { $b <=> $a } keys %hash;

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In reply to Re: hash creation. by Fastolfe
in thread hash creation. by Anonymous Monk

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