I cannot seem to understand these two lines in the state code lab. private var _todoItems = Mutabl...

# compose

[Mehdi Haghgoo]

I cannot seem to understand these two lines in the state code lab.
private var _todoItems = MutableLiveData(listOf<TodoItem>())
val todoItems: LiveData<List<TodoItem>> = _todoItems

If todoItems is immutable val, then how is it constantly updated with _todoItems livedata?

[romainguy]

Think in Java if you wrote List<String> l = new ArrayList<String>()

[Mehdi Haghgoo]

So, todoItems is not really immutable, is it?

[gildor]

yes, it’s correct, they are read only,

[Ian Lake]

The todoItems variable always points to the same object in memory (the LiveData object), that's what val means. val says nothing about the mutability of the object itself