Can you explain what using derivedStateOf means in the context of state management?

derivedStateOf in the context of state management (for example, in Jetpack Compose for Android) is used to create a derived state based on other states. It allows computing a new state that automatically updates when dependent states change, without the need to manually track changes.

For example, if you have multiple states and want to get their combination or computed value, derivedStateOf will create a memoized value that recalculates only when the input data changes, improving performance and simplifying UI logic.

Example:

val firstName = mutableStateOf("Ivan")
val lastName = mutableStateOf("Ivanov")

val fullName = derivedStateOf { "${firstName.value} ${lastName.value}" }

// fullName will automatically update when firstName or lastName changes