arrow-core-data / arrow.core / AndThen / invoke

invoke

open fun invoke(a: A): B

Invoke the [AndThen] function

import arrow.core.AndThen

fun main(args: Array<String>) {
  //sampleStart
  val f: AndThen<Int, String> = AndThen(Int::toString)
  val result = f.invoke(0)
  //sampleEnd
  println("result = $result")
}

Parameters

a - value to invoke function with

Return result of type B.

operator fun <A, B> invoke(f: (A) -> B): AndThen<A, B>

Wraps a function in AndThen.

import arrow.core.AndThen

fun main(args: Array<String>) {
  //sampleStart
  val f = AndThen { x: Int -> x + 1 }
  val result = f(0)
  //sampleEnd
  println("result = $result")
}

Parameters

f - the function to wrap

Return wrapped function f.