Book Image

Learning Scala Programming

By : Vikash Sharma
Book Image

Learning Scala Programming

By: Vikash Sharma

Overview of this book

Scala is a general-purpose programming language that supports both functional and object-oriented programming paradigms. Due to its concise design and versatility, Scala's applications have been extended to a wide variety of fields such as data science and cluster computing. You will learn to write highly scalable, concurrent, and testable programs to meet everyday software requirements. We will begin by understanding the language basics, syntax, core data types, literals, variables, and more. From here you will be introduced to data structures with Scala and you will learn to work with higher-order functions. Scala's powerful collections framework will help you get the best out of immutable data structures and utilize them effectively. You will then be introduced to concepts such as pattern matching, case classes, and functional programming features. From here, you will learn to work with Scala's object-oriented features. Going forward, you will learn about asynchronous and reactive programming with Scala, where you will be introduced to the Akka framework. Finally, you will learn the interoperability of Scala and Java. After reading this book, you'll be well versed with this language and its features, and you will be able to write scalable, concurrent, and reactive programs in Scala.
Table of Contents (21 chapters)
Title Page
Packt Upsell
Contributors
Preface
Index

Summary


This chapter introduced us to the notion of reactive programming. We understood the concept of Observable events and reacting to them. This gave us an essence of what reactive programming is. After that, we went through reactive extensions and explored the API a bit. We saw how we can create Observables and subscribe to them. Finally, we looked at   an example that explained the way we can compose Observables using some operators available to us.

In next chapter, we'll cover one of the most important topics, that is, testing our programs. We'll go through the much talked about nowadays development model, that is, test-driven development (TDD). We'll start by answering the why and what of TDD and then understand the toolkits available in Scala for testing.