If you use a different scope for `launch` (like `GlobalScope`) your code will work without `yield`.

# coroutines

[Ruckus]

If you use a different scope for launch (like GlobalScope) your code will work without yield.

[marcinmoskala]

Also default dispatcher helps:

fun main(args: Array<String>) = runBlocking<Unit>(Dispatchers.Default) {
    val job = launch {
        var nextPrintTime = System.currentTimeMillis() + 500
        while (isActive) {
            if(System.currentTimeMillis() > nextPrintTime) {
                println("World!")
                nextPrintTime += 1000
            }
        }
    }
    println("Hello,")
    delay(2000)
    job.cancelAndJoin()
    println("World")
}

or:

fun main(args: Array<String>) = runBlocking<Unit> {
    val job = launch(Dispatchers.Default) {
        var nextPrintTime = System.currentTimeMillis() + 500
        while (isActive) {
            if(System.currentTimeMillis() > nextPrintTime) {
                println("World!")
                nextPrintTime += 1000
            }
        }
    }
    println("Hello,")
    delay(2000)
    job.cancelAndJoin()
    println("World")
}

[marcinmoskala]

@antonkeks It looks like a good puzzler to me 😉

[gildor]

while(true) blocks the only available thread, doesn’t look as puzzler for me

[gildor]

But interesting that it worked before, because launch was global and not child of runBlocking