To familiarize ourselves with the operators and their respective marble diagrams, the best way is to analyze the examples.

In this section, we see examples for the following operations:

• .map()
• .flatMap()
• .onExceptionResumeNext()
• .groupBy()
• .subscribeOn() and .observeOn()
• BehaviourSubject

This set of operators is diverse enough to familiarize the reader with the concepts of marble diagrams.