Intro Just like when learning a new language you need to build up a dictionary to start understanding how the language works, you got to learn the Rx operators and everything will eventually click together. And then once you have a good common of a language it’s okay to start coming up with new words too to boost the expressiveness of your speech and for convenience. Same thing happened with me last week - for the first time I felt like I’m getting work done with RxSwift because I had good understanding how to use at least few operators.