<@U2E974ELT> So basically this is how I would do ...

# coroutines

[jkbbwr]

@elizarov
So basically this is how I would do it;

kotlin
suspend fun countdown() {
    for (i in 1..10) {
        await(delay(1000))
        print("T-Minus $i")
    }
}

fun main(args: Array<String>) {
    run {
        await(countdown())
    }
}

Anything marked with suspend can be awaited. await will simply wait until the completion
of what was marked and then return anything that was returned.

kotlin
suspend fun countdown() {
    while (true) {
        yield()
    }
}

fun main(args: Array<String>) {
    run {
        spawn(countdown())
        spawn(countdown()).join()
    }
}

yield explicitly gives up control. spawn takes a suspend and creates a Job|Task from it.
These tasks are joinable and run concurrently with other tasks and can be canceled.