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.