We set out to learn more about basic operators. In doing so, we encountered the map() and filter() operators, which allowed us to control what was being emitted. Knowledge of the do() operator gave us a way to debug our streams. Furthermore, we learned about the existence of sandboxed environments, such as JS Bin and RxFiddle, and how they can help us to quickly get started with RxJS. AJAX was the next topic that we delved into, and we built an understanding of the different scenarios that might occur. Moving on deeper into RxJS, we looked at different operator categories. We barely scratched the surface on that one, but it offered us a way to approach how to learn which types of operators are in the library. Finally, we finished off this chapter by looking at how to change and develop our mindset to thinking about streams. 

It is with all this acquired knowledge that we are now ready to venture into more advanced Rx topics in the next chapter. We know our basics, now the time has come to master them.