This is an easy-peasy repo contains most important RxJava observers, observables, and operators with some samples. Samples Operators fromIterable fromArray repeat range rangeRepeat vinterval take skip timer distinct buffer map concatWith merge zip flatMap create debounce Observables observer scheduler disposable compositeDisposable single completable maybe flowable convertObservablesToAnotherOne coldObservables coldToHotObservable subjectAsObservableAndObserver publishSubjectAsObservableOnly asyncSubject behaviourSubject behaviourSubjectVisualSimulation replySubject rxKotlin Resources https://reactivex.io/documentation/operators.html https://github.com/ReactiveX/RxKotlin