Retrieves the observable representation of the value associated with the specified key in the observable map. The resulting observable emits updates whenever the value for the given key changes, is added, or is removed.

map

abstract fun <S> map(transform: (Map<K, V>) -> S): Observable<S>

Transforms the current observable into a new observable by applying the specified transformation function to its emitted values.

mergeWith

abstract fun <O, R> mergeWith(other: Observable<O>, merge: (Map<K, V>, O) -> R): Observable<R>

Combines the current observable with another observable, producing a new observable that emits values derived by applying the provided merge function to the current values of both observables.

onChange

abstract fun onChange(notifyOnRegistration: Boolean = true, callback: (Map<K, V>) -> Unit): Disposable

Registers callback to be invoked with every new value of this observable, and right away with the current one if notifyOnRegistration.

switchMap

@JvmStatic

fun <T, R> Observable<T>.switchMap(transform: (T) -> Observable<R>): Observable<R>

Maps the current value of this Observable to an inner observable through transform, and mirrors the inner observable of the most recent value only: whenever this observable emits, the previous inner observable is unsubscribed and the new one is followed.