Retrofit & RxJava multiple requests complete

Question

I need to do:

1. Request 2 lists of news from different websites
2. Combine results from requests
3. Sort items by date
4. Get 10 newest news
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Answer 1

If you don't want to do something specific with the combined results, then merge() is enough:

Observable regionalNews = ...;
Observable nationalNews = ...;

Observable
.merge(regionalNews, nationalNews)
.ignoreElements()
.observeOn(AndroidSchedulers.mainThread())
.doOnComplete(() -> { /* show alert */ })
.subscribe()