I think another answer is outdated. You should probably check the following methods. singleOrError: Emits the one and only element, IndexOutOfBoundsException if the source is longer than 1 item or a NoSuchElementException if the source is empty. firstOrError: Emits the first element or a NoSuchElementException if the source is empty. lastOrError: Emits the lastelement or … Read more
Update: From @lopar’s comments a better way would be: Observable.from(items).publish(publishedItems -> publishedItems.limit(1).concatWith(publishedItems.skip(1).debounce(1, TimeUnit.SECONDS))) Would something like this work: String[] items = {“one”, “two”, “three”, “four”, “five”}; Observable<String> myObservable = Observable.from(items); Observable.concat( myObservable.first(), myObservable.skip(1).debounce(1, TimeUnit.SECONDS) ).subscribe(s -> System.out.println(s));
Reactive programming is a programming paradigm, but I wouldn’t call it new. It’s actually been around for a while. Just like object-oriented programming, functional programming, or procedural programming, reactive programming is another programming paradigm. Paradigm is defined by Reactive Manifesto Reactive Streams, on the other hand, is a specification. For Java programmers, Reactive Streams is … Read more
Observable is the generic ReactiveX building block, of event source that emits values over time. (and thus exists in every language ReactiveX extended to) in short Observable events are: onNext* (onCompleted | onError)? /(* zero or more ? – zero or 1) Single and Completable are new types introduced exclusively at RxJava that represent reduced … Read more