[Haskell-cafe] Odd behavior with Num instance for lists (was: f^n for functional iteration)

[Dario Bertini]

I guess you meant

(*) = zipWith (*)
?

Dumb question: would it be fine to use such an instance in real world
application code (in contrast with library code... I guess it would be
frowned upon there?)

are there any "dangers"... weird interactions?

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