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kotlinlang

Hi, I'm coming to coroutines from RxJs. And I'm looking for the equivalent of `switchMap` where showing search results while the user is typing. And I want to cancel all the previous requests to the server, just have the last one. In RxJs you use `switchMap` for that. What's the coroutine equivalent?

to `concatMap` you can:
```
while(true) {
   userTypes.awaitFirst() //suspend fun
   showResult()
}
```
but `switchMap` might require launching coroutine in parallel and keeping reference to job to cancel it.

I think `concatMap` would wait for the previous result. But I don't want to do that: if there's a new event I want to cancel processing of the previous.

<https://kotlinlang.slack.com/archives/C1CFAFJSK/p1556268286222400?thread_ts=1556268286.222400>

I didn't see it. I guess I overlooked something. Let me check.