Is there a good way to interop from `Mono / Flux` to `Either / Validated` ? I find the suspended han...

# arrow

[Cody Mikol]

Is there a good way to interop from Mono / Flux to Either / Validated ? I find the suspended handling of parZip / parTraverse to be much more intuitive than the Webflux functionalities

[stojan]

You could probably use (or build something on top of) this https://github.com/Kotlin/kotlinx.coroutines/tree/master/reactive

[simon.vergauwen]

Are you looking for something like:

suspen fun <A> Mono<A>.toEither(): Either<Throwable, A?> = 
  Either.catch {
    awaitSingleOrNull()
  }

For Flux you could do the same but with collectList or take etc since need to deal somehow with how many elements you'd want to collect from the Flux to have it completed correctly.

[simon.vergauwen]

A better option might be if we add parZip to Flow and you could work with Flux / Flow iteropt so you can keep treating it as a stream without waiting until completion inside suspend