combineLatest.kt

fun printCurrentThread(tag: String) = println("$tag: ${Thread.currentThread().name.substringBefore("-")}")

fun main(args: Array<String>) {
	printCurrentThread("main thread name")

	Observable
			.combineLatest(
					just(Unit).observeOn(io()),
					just(Unit).observeOn(computation())
			) { _, _ ->
				Unit
			}
			.subscribe {
				printCurrentThread("subscribe onNext")
			}

	Thread.sleep(100L)
}