how to combine two `SharedFlow`s into `Flow` that emits when either `SharedFlow` emits?

# coroutines

[Marko Novakovic]

how to combine two `SharedFlow`s into Flow that emits when either SharedFlow emits?

[FunkyMuse]

Use flow.combine?

[Marko Novakovic]

Returns a Flow whose values are generated with transform function by combining the most recently emitted values by each flow.

if one flow doesn’t emit resulting flow won’t emit either right?

[Casey Brooks]

combine is for grouping the results of multiple flows into a single object. To simply create a new Flow that passes through the individual emissions from each one independently, merge is the correct operator to use here

[Marko Novakovic]

suspend fun main() {
    val a = MutableSharedFlow<String>()
    val b = MutableSharedFlow<Int>()

    a.emit("")
    b.emit(1)

    merge(a, b)
        .collect { println(it) }
}

prints nothing @Casey Brooks. am I doing it wrong?

[Casey Brooks]

By default, `MutableSharedFlow`s will drop emissions if there are no subscribers. You'll need to start collect { }-ing before calling .emit on either of the original flows

[Marko Novakovic]

riiiight, thanks!