If I have something like this: ```class Foo { ...

# getting-started

[Joshua Hansen]

If I have something like this:

class Foo {
    var number: Int = 0
}

Is it possible to pass a reference to the number property to another class so that the other class can reassign it?

[Michael Krussel]

I believe you can pass a KMutableProperty1 to a function and get an instance of from ::number.

You can also access the setter from it pass it somewhere as a Function.

[Stephan Schröder]

or you pass a lambda around:

val foo = Foo()
val setter: (Int)->Unit = { newValue -> foo.number = newValue }
class Bar( val setNumber: (Int)->Unit )
val bar = Bar(setter)

[Ruckus]

Here's an example of what @Michael Krussel said. You can use ::number::set to get a `(Int) -> Unit`:

fun main() {
    val foo = Foo()
    val bar = Bar()
    bar.run(foo::number::set)
    println(foo.number)
}

class Foo {
    var number: Int = 0
}

class Bar {
    fun run(consumer: (Int) -> Unit) {
        repeat(5) {
            consumer(it)
        }
    }
}