A question about setting multiple parameters

[leffsu]

Greetings!

Let's assume we have:

interface HomeScreenState {
val isLoading: Boolean
val title: String
val avatar: String
val items: List
val selectedItem: Any?
}

and a method like

fun update() {
_state.isLoading = true
val data = getSomeData()
_state.title = data.title
_state.avatar = data.avatar
_state.items = data.items
_state.selectedItem = data.items.firstOrNull()
}

or

fun update() {
_state.isLoading = true
val data = getSomeData()
_state.apply {
title = data.title
avatar = data.avatar
items = data.items
selectedItem = data.items.firstOrNull()
}
}

How many times would state.collect {} block be called in a view/widget in both cases?

[PatilShreyas]

The behaviour of StateFlow is conflated. So collect{} block will be called only once.

If there is a delay in getSomeData(), then the collector will be called twice.

[aartikov]

It depends on dispatcher

[PatilShreyas]

Yes, it depends on the dispatcher. For example, if using Main.immediate dispatcher, then each update will cause new model creation.

[PatilShreyas]

Converting this to a discussion since it's not actually an issue.