arrow-core-data / arrow.core / AndThen / andThen

andThen

fun <X> andThen(g: (B) -> X): AndThen<A, X>

Compose a function to be invoked after the current function is invoked.

import arrow.core.AndThen
import arrow.core.extensions.list.foldable.foldLeft

fun main(args: Array<String>) {
  //sampleStart
  val f = (0..10000).toList().foldLeft(AndThen { i: Int -> i + 1 }) { acc, _ ->
    acc.andThen { it + 1 }
  }

  val result = f(0)
  //sampleEnd
  println("result = $result")
}

Parameters

g - function to apply on the result of this function.

Return a composed AndThen function that first applies this function to its input, and then applies g to the result.