First try at nullable

mapN

https://github.com/arrow-kt/arrow-core/pull/189 Would appreciate any feedback!

Thanks for the contribution! I’m reviewing it at the moment 🙂

@aballano updated based on your comments! thanks for showing me the

Gen

stuff. I left in

mapN

with 1 argument, but can remove it if we just want to consumers to use

a?.let { fn(it) }