This chapter was a Scala-Akka dojo where you learnt through several Katas. In the first part we explored the fundamental parts of Scala; in the second part we focused on the Akka actor model.
It is true, there were many important topics not covered in this chapter, such as futures, promises, and parallel collections. But we tried to provide a reference to them, although not an exhaustive guide.
So, as all the book examples are in Scala, we need to master fundamental techniques before delve into the SMACK stack.
The Actor Model is important to understand the architecture and operation of Spark.
In the following chapter, we will explore Spark design and provide some examples using Scala.
