I have an `Either<E,V>`. I want to run some ...

# arrow

[Phani Mahesh]

I have an Either<E,V>. I want to run some extra checks on V and end up with a Left if they fail. Is there a utility function?

[Phani Mahesh]

Ex: 10.right().someFunc({ it.isOdd()}, { -> "Not Odd".left() }), what can someFunc be?

[Phani Mahesh]

I'm stupid, I can use Either.cond for this.

[kioba]

you can use flatMap as well in case you don’t have access to the Either construction.

fun myFunction(e: Either<Exception, Int>) =
e.flatMap{
  Either.cond(it.isOdd(), { it }, { error })
}