agree, nowhere close to best practice but the approach to for loop is worth learning

I agree this is nowhere close to best practice

Clever, but 'Best Practise'? Seriously?

1. Obscure naming
2. Obscure logic
3. No comments for obscure logic
4. Recursion
5. Formatting (blank line after last return)
6. 'm' variable is declared too far from it actual usage

Actually, it really may not compile due to project style violation rule like 'do not use single char names outside of lambdas'
(see lint)