Recursion
Stobb forgot to discuss one important dogma of Functional Programming: No loops, ever. Use mapping, reduction or recursion instead. For the last part, I have never quite understood what makes recursion always superior over good old "while". In those cases where a loop would suffice, recursion is just a GOTO to the beginning of the function. On the other hand, in a pure FP language where variables can never be reassigned, a "while" would be pointless, so these go hand in hand.
Biting the hand that feeds IT
