Kotlin: how to pass a function as parameter to another?

Question

Given function foo :

fun foo(m: String, bar: (m: String) -> Unit) {
    bar(m)
}

We can do:

foo(\"a message\", { println         


        

Answer 1

If you want to pass setter and getter methods.

private fun setData(setValue: (Int) -> Unit, getValue: () -> (Int)) {
    val oldValue = getValue()
    val newValue = oldValue * 2
    setValue(newValue)
}

Usage:

private var width: Int = 1

setData({ width = it }, { width })