When in MVI what would you do a thing that has no diff? Like lets say some list of dynamically added buttons in a horizontal scroll view and you want to select one (and show border around it for example) by mvi it should be a click routed to viewmodel or wherever, where it copy mutates the state and emits a new tuple of list + selected index for example but now what, what about the list? only the index basically changed. Do you teardown the whole buttons list and recreate?

Model would be like,

data class Model(val list: List<Item>, val selectedIndex: Int)

. So, here, I would just update the

selectedIndex

and return the model without touching the list.

Yes but in this case its not a recycler view but some linear layout with dynamically added views. Would you diff it manually?

Yeah. Since I always have access to previous model in my

render(oldModel: Model, newModel: Model)

, I will diff it manually for those cases.

Btw similar issue is edit text.. every char typed is new State(val text) emitted..and then edittext.text = state.text.. it spams edit text too much and typing lags