Hi, I’m struggling to think of a good way to comb...

# arrow

[Vera van Mondfrans]

Hi,

I’m struggling to think of a good way to combine Either with Flow when the flow can emit values before coming across something that should cause failure. For example:

fun getNumbersThatAreNotEleven(n: Int): Either<ThatsElevenException, Flow<Int>> = 
  flow {
    for(i in 1..n) {
      if (i == 11) {
        // sacrilege, what do I do here?
      } else {
        emit(i)
      }
    }
  }

[albertosh]

Not sure if you’ll be able to do it. flow is lazily evaluated for each element, so unless you can recognize that something will fail at any point in time, you’d have already emitted the first items

[simon.vergauwen]

fun getNumbersThatAreNotEleven(n: Int): Flow<Either<ThatsElevenException, Int>>

This would work

[Vera van Mondfrans]

Right, i was afraid it;d be something like the latter

[Vera van Mondfrans]

Thanks : )