How to convert function output to Unit with Kotlin

Question

I have troubles with a function in Kotlin that should return Unit, but due to a usage of another function returning a Boolean, there is a type mismatch.

Here is a co

Answer 1

As another alternative, you could make a higher order function that swallows the output of the function returning a value:

fun consume (fn: () -> Any): Unit {
  fn()
}

Giving:

fun foo(bar: Int): Unit = when(bar) {
    0 -> println("0")
    else -> consume { printAndReturnTrue(bar) }
}