Realizing the answer may be “Don’t get yourself in...

# arrow

[ibcoleman]

Realizing the answer may be “Don’t get yourself into such a situation.” I’m wondering if there’s a way to convert an Either<A, Either<A, B>> into an Either<A, B> (Sorry for the basic question)

[Satyam Agarwal]

val x: Either<Nothing, Either<Nothing, Int>> = 1.right().right()
val y: Either<Nothing, Int> = x.flatten()

[Satyam Agarwal]

works in 0.11.0

[ibcoleman]

flatten()! Outstanding, thanks Satyam!

[raulraja]

Hi Ian, Satyam ! Ian, alternatively you may have a map that should had been a flatMap at the point you are nesting. Beside flatten which is the same as flatMap(identity()) you can always use an either computation expressions to compose and extract the values in them:

either {
   val nested = x.bind()
   val y = nested.bind()
   y // Int
}