Principles of Scala FP
Scala supports all FP features. However, it is not easy to cover them in a single chapter. So we will discuss only the following few important FP features in this chapter:
- Pure functions
- Immutability (Immutable data)
- Referential transparency
- Functions are first-class citizens
- Anonymous functions
- Higher-Order Functions (HOF)
- Currying
- Tail recursion
- Implicit
- Typeclasses
FP Design Patterns
The following three are the most important and frequently used Functional Design Patterns.
- Monoid
- Monad
- Functor (Applicative functor)
Note
If you are new to Scala FP features and want to learn them in depth, I recommend that you refer to any Scala Basics books before picking this one.
Consider the following Scala FP features:

In the sections that follow, we will pick these features, one by one and discuss them in depth with some examples.
Scala FP features in action
I assume that you are already familiar with Scala Basics, Scala OOP features, and more. If you are new to them, go through some Scala basics...