arrow-core/arrow.core/Validated/Companion/lift

lift

inline fun <E, A, B> lift(crossinline f: (A) -> B): (Validated<E, A>) -> Validated<E, B>(source)

inline fun <A, B, C, D> lift(crossinline fl: (A) -> C, crossinline fr: (B) -> D): (Validated<A, B>) -> Validated<C, D>(source)

Lifts two functions to the Bifunctor type.

import arrow.core.*

fun main(args: Array<String>) {
  //sampleStart
  val f = Validated.lift(String::toUpperCase, Int::inc)
  val res1 = f("test".invalid())
  val res2 = f(1.valid())
  //sampleEnd
  println("res1: $res1")
  println("res2: $res2")
}