For each of the five keys I have I'm retrieving the second key and corresponding value from a double hash - then I want to sort those according to value, and if there are any duplicates in 'second' keys, I want to retrieve another one, until all five 'second' keys are unique.

foreach my $k (keys %{$data[$i]}) { #5 keys
        my ($key, $val) = retrieve_kv($hash{$k});
        
        ### CHECK IF UNIQUE - push to array and sort?
        ### REDO my ($key, $val) = retrieve_kv($hash{$k})
        ### UNTIL ALL 5 ARE UNIQUE

}

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Any tips on how to structure the inner loop efficiently?

In reply to Until loop / unique by monkini

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