List of Figures

Chapter 1. Why Scala?

Figure 1.1. A pure function that maps values of X to exactly one value of Y

Chapter 2. Getting started

Figure 2.1. The syntax of the Scala function declaration

Figure 2.2. The syntax of a for-comprehension

Chapter 3. OOP in Scala

Figure 3.1. Class hierarchy of UpdatableCollection before class linearization

Figure 3.2. Class linearization of UpdatableCollection

Figure 3.3. Class hierarchy of Scala with subtypes and views

Chapter 4. Having fun with functional data structures

Figure 4.1. Scala collection hierarchy with three main types of collections: Set, Seq, and Map

Figure 4.2. Parallel collections implemented in terms of split and combine operations using the Fork/Join framework

Figure 4.3. Scala parallel collection hierarchy

Chapter 5. Functional programming

Figure 5.1. A pure function where each value of X is mapped to exactly one value of Y

Figure 5.2. Separating pure and side-effecting (impure) code. The side-effecting code should form a thin layer around the application.

Figure 5.3. A partial function that’s only defined for a subset of parameter values, in this case only for 1 and 3. Compare this figure with figure 5.1.

Chapter 6. Building web applications in functional style

Figure 6.1. Kanban board with four phases.

Figure 6.2. SBT project structure

Figure 6.3. WeKanban project structure

Figure 6.4. The way HTTP requests are handled by Scalaz

Chapter 7. Connecting to a database

Figure 7.1. The H2 console

Figure 7.2. The Create a new Story screen