arrow-core/arrow.core/Either/Companion/lift

lift

fun <A, B, C> ~~lift~~(f: (B) -> C): (Either<A, B>) -> Either<A, C>

Deprecated

This API is considered redundant. If this method is crucial for you, please let us know on the Arrow Github. Thanks! https://github.com/arrow-kt/arrow/issues Prefer explicitly creating lambdas

Replace with

{ it.map(f) }

Lifts a function (B) -> C to the Either structure returning a polymorphic function that can be applied over all Either values in the shape of Either

import arrow.core.*

fun main(args: Array<String>) {
 //sampleStart
 val f = Either.lift<Int, CharSequence, String> { s: CharSequence -> "$s World" }
 val either: Either<Int, CharSequence> = "Hello".right()
 val result = f(either)
 //sampleEnd
 println(result)
}

@JvmStatic

fun <A, B, C, D> ~~lift~~(fa: (A) -> C, fb: (B) -> D): (Either<A, B>) -> Either<C, D>

Deprecated

This API is considered redundant. If this method is crucial for you, please let us know on the Arrow Github. Thanks! https://github.com/arrow-kt/arrow/issues Prefer explicitly creating lambdas

Replace with

{ it.bimap(fa, fb) }