arrow-core/arrow.core/separateEither

separateEither

fun <A, B> Iterable<Either<A, B>>.separateEither(): Pair<List<A>, List<B>>

Separate the inner Either values into the Either.Left and Either.Right.

Receiver

Iterable of Validated

Return

a tuple containing List with Either.Left and another List with its Either.Right values.

fun <A, B> Sequence<Either<A, B>>.separateEither(): Pair<Sequence<A>, Sequence<B>>

Separate the inner Either values into the Either.Left and Either.Right.

Receiver

Iterable of Validated

Return

a tuple containing Sequence with Either.Left and another Sequence with its Either.Right values.

fun <A, B> Option<Either<A, B>>.~~separateEither~~(): Pair<Option<A>, Option<B>>

Deprecated

This API is niche and will be removed in the future. If this method is crucial for you, please let us know on the Arrow Github. Thanks! https://github.com/arrow-kt/arrow/issues Prefer using the Option DSL, or explicit fold or when

Replace with

import arrow.core.None
import arrow.core.Some
import arrow.core.Option

fold({ None to None }) { either -> either.fold<Pair<Option<A>, Option<B>>>({ Some(it) to None }, { None to Some(it) }) }

Separate the inner Either value into the Either.Left and Either.Right.

Receiver

Option of Either

Return

a tuple containing Option of Either.Left and another Option of its Either.Right value.