Extension functions for LiveData

LiveDataExt.kt

import androidx.lifecycle.LiveData
import androidx.lifecycle.liveData
import androidx.lifecycle.map
import androidx.lifecycle.switchMap
import kotlinx.coroutines.delay

// Combine latest values
inline fun <X, Y, Z> LiveData<X>.combineLatest(data: LiveData<Y>, crossinline mapFunction: (X, Y) -> Z): LiveData<Z> {
    return switchMap { x: X -> data.map { y: Y -> mapFunction(x, y) } }
}

// Only emit a value from LiveData if a particular timespan has passed without it emitting another value
fun <X> LiveData<X>.debounce(timeoutMillis: Long): LiveData<X> {
    return switchMap { value ->
        liveData {
            delay(timeoutMillis)
            emit(value)
        }
    }
}