The previous chapters covered more than 30 operators. These operators allow us to implement a realistic application, but many others are often needed. This chapter describes more than 40 other operators that are also commonly used, grouped by functional category. As usual, each operator is described with its marble diagram, a comprehensive description, and an example of how to use it to help you decide when to use what operator.

The following topics will be covered in this chapter:

• Transforming observables
• Filtering observables
• Combining observables
• Utility operators
• Conditional operators
• Mathematical operators