merge.kt

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

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

	Observable
			.merge(
					just(Unit).subscribeOn(Schedulers.computation()),
					just(Unit).subscribeOn(Schedulers.io())
			)
			.subscribe {
				printCurrentThread("subscribe onNext")
			}

	Thread.sleep(100L)
}