Is there an example of the Haskell analog 'mapM wi...

# arrow

[Jörg Winter]

Is there an example of the Haskell analog 'mapM with IO' in arrow core or arrow fx ?
I want to build a List (or Traversable, ..) of IO actions, and run them by mapM'ing over that data.

is it only foldMapM from ListKFoldable ? or is there a more compact way somewhere ?

[simon.vergauwen]

You’re looking to transform List<A> into IO<B> using (B, A) -> B ?

[simon.vergauwen]

In that case you’d want to use foldMapM from Foldable yes.

listOf(1, 2, 3).foldMapM(IO.monad()) { acc, i ->
   IO { acc + i }
} // IO(6)

[Jörg Winter]

exactly, thx!