Chapter 3. Functional Programming Concepts
"Object-oriented programming makes code understandable by encapsulating moving parts. Functional programming makes code understandable by minimizing moving parts."
- Michael Feathers
Using Scala and Spark is a very good combination for learning big data analytics. However, along with the OOP paradigm, we also need to know-how why functional concepts are important for writing Spark applications that eventually analyze your data. As mentioned in the previous chapters, Scala supports two programming paradigms: the Object-Oriented Programming paradigm and the Functional programming concepts. In Chapter 2, Object-Oriented Scala, we explored the OOP paradigm in which we have seen how to represent real-world objects in blueprints (classes) and then instantiate them into objects having real memory representation.
In this chapter, we will focus on the second paradigm (i.e. functional programming). We will see what functional programming is and how Scala supports...