hi there, I'm trying to add arrow to an example an...

# arrow-contributors

[aballano]

hi there, I'm trying to add arrow to an example android app. I'm wondering, is it possible, having an IO<Either<E, A>> to flatmap to another one in case the inner Either is left?

I managed to do this, but I believe the same IO is being executed twice in case of the either is right

fun <E, A> IO<Either<E, A>>.handleErrorWith(f: (E) -> IO<Either<E, A>>): IO<Either<E, A>> {
    return flatMap { either ->
        either.fold(ifLeft = {
            f(it)
        }, ifRight = { this })
    }
}

[pakoito]

ifRight = { just(it) })

[aballano]

close, had to wrap into either also ifRight = { just(it.right()) })