Let's recap the categories of operators covered by the series. This lesson also shows what was not taught, and what comes next as learning material.
By now we have seen in this series, most of the common operators for transformation, filtering, and combination. In my opinion, the operators we saw, like combine latest, merge, take, skip and first, and many others are operators that you're going to be dealing with very often when handling RxJS code.
There are some variants that we didn't cover, like distinct has these variants, but in those cases the variant is either easy to understand if you know the others or they are very simple and don't require too much learning, like ignore elements is very simple and single as well.