13 replies

Mapping Values of an Array with Effect in FP-TS

Is there something in Effect to map the right values of an

Array<Either<E, A>>

Array<Either<E, A>>

? I want to further refine the array by doing a computation on successes, accumulating further potential errors for each element so it looks like

Array<Either<E | EE, B>>

Array<Either<E | EE, B>>

. Something like

RA.map(a => E.isLeft(a) ? a : doSomething(a))

RA.map(a => E.isLeft(a) ? a : doSomething(a))

With fp-ts I could do that with nested pipes and

chainW

chainW

. It seems like Effect has a lot of utility functions to make things like this easier that I am probably missing.