Am using `StateFlow` in view model (along with use of `stateIn`)....is there something equivalent to...

# coroutines

[John O'Reilly]

Am using StateFlow in view model (along with use of stateIn)....is there something equivalent to MediatorLiveData or switchMap when using that?

[Javier]

combine?

[Javier]

https://kotlin.github.io/kotlinx.coroutines/kotlinx-coroutines-core/kotlinx.coroutines.flow/combine.html

[John O'Reilly]

The specific example I'm looking at is

val network = MutableStateFlow<String>("")
val stations = cityBikesRepository.pollNetworkUpdates(network.value)
    .stateIn(viewModelScope, SharingStarted.WhileSubscribed(), emptyList())

When network changes I want to restart polling using that value....I'm possibly trying to overstretch this approach to something it's perhaps not intended to support

[John O'Reilly]

hmm, maybe combine might do the trick

[Jan Skrasek]

switchmap is flatMapLatest.

[John O'Reilly]

yeah, looks like flatMapLatest is what I need.....thanks @Jan Skrasek / @Javier

val stations =  network.flatMapLatest {  cityBikesRepository.pollNetworkUpdates(it) }
    .stateIn(viewModelScope, SharingStarted.WhileSubscribed(), emptyList())

[John O'Reilly]

got to love Kotlin 🙂

[gildor]

You could just try to use switchMap, it exists, but deprecated, it's just an alias for flatMapLatest

[John O'Reilly]

In original question here I had been thinking of LiveData's switchMap but, yeah, could have probably also used Flow's one....in general I was probably overthinking this with use of StateFlow in the mix