Thinking in streams

So far, we have gone through a bunch of scenarios that have shown us which operators are at our disposal and how they can be chained. We have also seen how operators such as flatMap() and switchMap() can really change things as we move from one type of observable to another. So, which approach should you take when working with Observables? Obviously, we need to express an algorithm using operators, but where do we start? The first thing we need to do is to think of the start and the end. Which types of events do we want to capture and what should the end result look like? That already gives us a hint as to the number of transformations we need to carry out to get there. If we want to transform the data only, then we can probably make do with a map() operator and a filter() operator. If we want to transform from one Observable to the next, then we need a flatMap...