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kotlinlang

Hi all, I'm  stuck and hoping someone can point me in the right direction :pray: . I"m trying to do something like this:

```val numbers = listOf(1, 2, 3, 4)
val strings = numbers.map { somethingThatReturnsEither(it) }

// Here I'd like to map strings and put Lefts into one list and Rights into another list

return Tuple2(failures, successes)```
Hopefully that makes sense. I could just do a forEach and put everything into lists manually, but I'm hoping there's an FP way here

you can use list.partition { it.isRight() } or perhaps foldMap

ahh partition sounds like what I need! thank you :slightly_smiling_face: too many functions lol

looks like the types don't come thorugh with partition as I get two lists with the same inferred types. I can manually cast, but is there a better way?

you can also just fold the list and accumulate on the desired result type