reaktive/com.badoo.reaktive.observable/scan

scan

fun <T> Observable<T>.scan(accumulator: (acc: T, value: T) -> T): Observable<T>

Returns an Observable that subscribes to the source Observable and calls the accumulator function with a result of a previous accumulator invocation and a current element. The returned Observable emits every value returned by the accumulator function.

Please refer to the corresponding RxJava document.

fun <T, R> Observable<T>.scan(seed: R, accumulator: (acc: R, value: T) -> R): Observable<R>

Returns an Observable that subscribes to the source Observable and calls the accumulator function first with the specified seed value and a first element emitted by the source Observable. Then for every subsequent element emitted by the source Observable, calls accumulator with its previous result the emitted element. The returned Observable emits every value returned by the accumulator function.

Please refer to the corresponding RxJava document.

fun <T, R> Observable<T>.scan(getSeed: () -> R, accumulator: (acc: R, value: T) -> R): Observable<R>

Returns an Observable that subscribes to the source Observable and calls the accumulator function first with a value returned by getSeed function and a first element emitted by the source Observable. Then for every subsequent element emitted by the source Observable, calls accumulator with its previous result the emitted element. The returned Observable emits every value returned by the accumulator function.

Please refer to the corresponding RxJava document.