Why the last line prints `false` if the line befor...

# flow

[Tgo1014]

Why the last line prints false if the line before it prints 1 ?

val flow = MutableStateFlow(2)
val flowB: StateFlow<Boolean> = flow
    .map { it == 1 }
    .stateIn(GlobalScope, SharingStarted.Eagerly, false)

println(flow.value) // 2
flow.value = 1
println(flow.value) // 1
println(flowB.value) // false

[franztesca]

The flow is asynchronous. When you emit 1 in flow , there is some time before flowB picks collects the value from flow, maps it and emits it.
Your println statements are executed in that time, after 1 is emitted by flow but before 1 is collected by flowB.
You can run flowB on an Unconfined dispatcher to make it process the value as soon as it is emitted by flow.

.stateIn(GlobalScope + Dispatchers.Unconfined