[foldr]

Haskell hides far more of the inner workings than Python, JS or Go. There's a huge gap between the semantics of a non-strict, pure functional language and the actual execution model.

[unfocussed_mike]

(Username checks out)

[tlavoie]

Sure, except it should be foldl' instead.

StackOverflow is thataway -->

Edit for reason: https://wiki.haskell.org/Foldr_Foldl_Foldl'