ExtFunctions.kt

inline fun <T> MutableIterable<T>.iter(func: MutableIterator<T>.(T) -> Unit) {
    val iter = iterator()

    while (iter.hasNext()) {
        val item = iter.next()
        func(iter, item)
    }
}

fun example() {
    val list = mutableListOf("one", "two", "three", "four")

    list.iter {
        println(it)

        if (it == "three") {
            remove()
        }
    }
}