The Observer pattern done right
ReactiveX is a combination of the best ideas from
the Observer pattern, the Iterator pattern, and functional programming
ReactiveX is everywhere, and it's meant for everything.
Manipulate UI events and API responses, on the Web with RxJS, or on mobile with Rx.NET and RxJava
Embrace ReactiveX's asynchronicity, enabling concurrency and implementation independence
Avoid intricate stateful programs, using clean input/output functions over observable streams.
Less is more
ReactiveX's operators often reduce what was once an elaborate challenge into a few lines of code.
Async error handling
Traditional try/catch is powerless for errors in asynchronous computations, but ReactiveX is equipped with proper mechanisms for handling errors.
Concurrency made easy
Observables and Schedulers in ReactiveX allow the programmer to abstract away low-level threading, synchronization, and concurrency issues.