Probably a very naive question, but I can't find an easy solution for: What's the most concise way o...

# arrow

[Michael Marth]

Probably a very naive question, but I can't find an easy solution for:
What's the most concise way of turning a List<Option<A>> into a Option<List<A>> ? So if any if the `Option`s in the original List is None , the whole return type should be None .

[Patrick Louis]

List<Option<A>>.sequence(Option.applicative()) will return a Option<List<A>> or rather Kind<ForOption,Kind<ForListK,A>> so you'll have to fix() output.

[Michael Marth]

sequence !
Thanks! Could not remember from my Haskell days ...