Book Image

Scala Programming Projects

By : Mikael Valot, Nicolas Jorand
Book Image

Scala Programming Projects

By: Mikael Valot, Nicolas Jorand

Overview of this book

Scala Programming Projects is a comprehensive project-based introduction for those who are new to Scala. Complete with step-by-step instructions and easy-to-follow tutorials that demonstrate best practices when building applications, this Scala book will have you building real-world projects in no time. Starting with the fundamentals of software development, you’ll begin with simple projects, such as developing a financial independence calculator, and then advance to more complex projects, such as a building a shopping application and a Bitcoin transaction analyzer. You’ll explore a variety of Scala features, including its OOP and FP capabilities, and learn how to write concise, reactive, and concurrent applications in a type-safe manner. You’ll also understand how to use libraries such as Akka and Play. Furthermore, you’ll be able to integrate your Scala apps with Kafka, Spark, and Zeppelin, along with deploying applications on a cloud platform. By the end of the book, you’ll have a firm foundation in Java programming that’ll enable you to solve a variety of real-world problems, and you’ll have built impressive projects to add to your professional portfolio.
Table of Contents (18 chapters)
Title Page
Copyright and Credits
Packt Upsell
Contributors
Preface
Index

Summary


We have covered how to create a small project in Scala from scratch to packaging. We used TDD along the way so that it is guaranteed that our code was well-designed and robust. It gives us confidence when we refactor code: as long as all tests pass, we know that our code stills works. We modeled our domain with immutable data structures and processed them using pure functions that have no side effects.

We used some basic features of the language that are used in most projects, and you should now be familiar with enough building blocks to implement a wide variety of projects.

As a further exercise, you could enhance this calculator with one or many of these features:

  • Create an app for the function RetCalc.nbOfMonthsSaving, which calculates how long you need to save before you can retire.
  • Create a function called RetCalc.annualizedTotalReturn, which calculates the geometric average of a sequence of returns. See https://www.investopedia.com/terms/a/annualized-total-return.asp for more details...