Here we are; with approximately 80 ReactiveX operators covered, you should now have all the keys to implement a reactive application by creating, combining, filtering, or implementing any logic.

Being at ease with all these operators is one of the difficult parts of ReactiveX. The framework contains many operators, sometimes with confusing names, and sometimes with similar names but different behaviors. Moreover, the 80 operators covered here are only half of all the available operators in RxPY! However, most of the remaining ones are variants of the ones described here.

This chapter can be used as a quick reference to find the operator adapted to each use case. Hopefully, for each operator, the example provided with the description should also help you to clearly understand how and when to use the operator.

Some operators can be difficult to comprehend. They are usually the ones that work on higher-order observables. If you do not understand them at first, do not give up on using RxPY. This is part of the ReactiveX learning curve, and you can come back to them once you are familiar with all the basic operators.

The next chapter will focus on another important area of any framework: testing and debugging. As you will see, if functional programming and ReactiveX help in writing testable code, it lacks facilities for debugging.