Argthtjtr

I have two observables and i would like to take from each one until there is nothing left from both. is there any operator to do this ? let me show you an example of what i have tried and what i want to accomplish:

  Observable<String> observable = Observable.just("hello","are", "doing");

        Observable<String> observable2 = Observable.just("how","you","today");

i would like to "reduce" this such that the final emissions would be"
Hello how are you doing today

here i have tried using scan but it works more like accumulation and i get the following results:

Observable.merge(observable, observable2).reduce(new BiFunction<String, String, String>() {

        @Override

        public String apply(String wordAccum1, String word2) {

            return wordAccum1 + " " + word2;

        }



    }).subscribe(new Consumer<String>() {

        @Override

        public void accept(String sentence) throws Exception {

            Log.v("consumerResult",sentence+"");

        }

    });

log output shows:
consumerResult: hello are doing how you today

how can i take from each one consecutively ?

Try this

    Observable<String> observable = Observable.just("hello", "are", "doing");

    Observable<String> observable2 = Observable.just("how", "you", "today");





    observable.zipWith(observable2, new BiFunction<String, String, String>() {

        @Override

        public String apply(String s, String s2) throws Exception {

            return s+" "+s2;

        }

    }).reduce(new BiFunction<String, String, String>() {

        @Override

        public String apply(String s, String s2) throws Exception {

            return s+ " " + s2;

        }

    }).subscribe(new Consumer<String>() {

        @Override

        public void accept(String s) throws Exception {

            System.out.println(s); // this will emit with "hello how are you doing today"

        }

    });

If you are using Java 8, you can reduce the same code using lambda, as follows

 observable.zipWith(observable2, (s, s2) -> s + " " + s2)

            .reduce((s, s2) -> s +" "+ s2).subscribe(System.out::println);