Learning RxJava

Fixed-size buffering

The simplest overload for buffer() accepts a count argument that batches emissions in that fixed size. If we wanted to batch up emissions into lists of eight elements, we can do that as follows:

import io.reactivex.Observable;public class Launcher {    public static void main(String[] args) {     Observable.range(1,50)               .buffer(8)               .subscribe(System.out::println);   }}

The output is as follows:

[1, 2, 3, 4, 5, 6, 7, 8][9, 10, 11, 12, 13, 14, 15, 16][17, 18, 19, 20, 21, 22, 23, 24][25, 26, 27, 28, 29, 30, 31, 32][33, 34, 35, 36, 37, 38, 39, 40][41, 42, 43, 44, 45, 46, 47, 48][49, 50]

Of course, if the number of emissions does not cleanly divide, the remaining elements will be emitted in a final list even if it is less than the specified ...