A modern programming language that makes developers happier.

kotlinlang

Hi guys, super quick question.
Is there any way to create a cold observable that emits value only once for first subscription made to that observable?  It would require an observable with some kind of a memory, or something like that?
An observable that passes this test (Observable.just is just a placeholder):

``` 
@Test
   fun `assert observable fires only once ever`() {
       val testObservable = Observable.just(true)

       testObservable.test().assertValue(true)

       testObservable.test().assertNoValues()
   }
```

If you’re okay with using experimental coroutines, I think this would work
```
val channel = Channel&lt;Boolean&gt;(CONFLATED)
channel.offer(true)
val testObservable = channel.consumeAsFlow().asObservable()

testObservable.test().assertValue(true)

testObservable.test().assertNoValues()
```