Appendix D: Materializing and Dematerializing

Two interesting operators we have not yet covered are materialize() and dematerialize(). We did not cover them in Chapter 3, Basic Operators, with all the other operators because it might have been confusing at that point in your learning curve. But hopefully, the point at which you are reading this means that you understand the onNext(), onComplete(), and onError() events well enough to use an operator that abstractly packages them in a different way.