可在Kotlin中观察到的列表

我有这样的服务

 @GET("/")
fun getInfo(@Query("pew") pew1: Double, @Query("pew2") pew2: Double): Observable<PewResponse>

所以现在,当我有这个的时候

我有一个用服务器数据填充的列表

private var mPewList: MutableList<PewList> = arrayListOf()

然后我有这个功能

override fun getResultFromNetwork(): Observable<PewResponse> {
    val pewObservable = pewService.getInfo("pew1","pew2")
    return pewObservable.concatMap {
      //How do I fill my list ??

    }


}

我对这个很陌生 rxJava 所以我看到人们使用 Single 其他人用 Observable 有什么更好的?

编辑

我以这个例子为例 https://github.com/joanby/android-mvp/blob/master/MoviesFeed/app/src/main/java/com/juangabriel/moviesfeed/movies/MoviesRepository.java

现在我想做这样的事情:

@Override
public Observable<Result> getResultFromNetwork() {

    Observable<TopMoviesRated> topMoviesRatedObservable = moviesApiService.getTopMoviesRated(1)
            /*.concatWith(moviesApiService.getTopMoviesRated(2))
            .concatWith(moviesApiService.getTopMoviesRated(3))*/;

    return topMoviesRatedObservable
            .concatMap(new Function<TopMoviesRated, Observable<Result>>() {
                @Override
                public Observable<Result> apply(TopMoviesRated topMoviesRated) {
                    return Observable.fromIterable(topMoviesRated.getResults());
                }
            }).doOnNext(new Consumer<Result>() {
                @Override
                public void accept(Result result) {
                    results.add(result);
                }
            });

}

因此,我看到他填写了结果列表,然后在演示者上执行以下操作: https://github.com/joanby/android-mvp/blob/master/MoviesFeed/app/src/main/java/com/juangabriel/moviesfeed/movies/MoviesPresenter.java