Idiomatic way to sum a list of Maybe Int in haskell

Question

Is there a more idiomatic way to implement the following? I feel like I\'m missing a way to get rid of the lambda, but couldn\'t figure out a way to convert it to point-free. Ma

Answer 1

I think foldM works well here.

import Control.Monad
sumMay = foldM (fmap . (+)) 0

I think it's the clearest as it maps (Ba duh duh ching) to what you'd do in pure code.