Say I have a Flow of Booleans and only want to emit when they flip, what is the proper way to do tha...

# flow

[jossiwolf]

Say I have a Flow of Booleans and only want to emit when they flip, what is the proper way to do that? What am I looking for?

suspend fun Flow<Boolean>.flippedTo(value: Boolean, block: () -> Unit) {
    var previous: Boolean? = null
    collect { current ->
        if (previous == !value && current == value) {
            block()
        }
        previous = current
    }
}
boolFlow.flippedTo(false) {
    println("Flipped from true to false")
}
boolFlow.flippedTo(true) {
    println("Flipped from false to true")
}

[Javier]

StateFlow is not enough?

[baxter]

Maybe try distinctUntilChanged ? Or that ☝️