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Learning Scala Programming

You're reading from   Learning Scala Programming Object-oriented programming meets functional reactive to create Scalable and Concurrent programs

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Product type Paperback
Published in Jan 2018
Publisher Packt
ISBN-13 9781788392822
Length 426 pages
Edition 1st Edition
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Author (1):
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Vikash Sharma Vikash Sharma
Author Profile Icon Vikash Sharma
Vikash Sharma
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Table of Contents (16) Chapters Close

1. Getting Started with Scala Programming FREE CHAPTER 2. Building Blocks of Scala 3. Shaping our Scala Program 4. Giving Meaning to Programs with Functions 5. Getting Familiar with Scala Collections 6. Object-Oriented Scala Basics 7. Next Steps in Object-Oriented Scala 8. More on Functions 9. Using Powerful Functional Constructs 10. Advanced Functional Programming 11. Working with Implicits and Exceptions 12. Introduction to Akka 13. Concurrent Programming in Scala 14. Programming with Reactive Extensions 15. Testing in Scala 16. Other Books You May Enjoy

Why so serious about types?


We've seen that knowing what we're doing can save life. But joking aside, if we really think before writing our applications, it can really help. Our programs consist of two ingredients:

Data     |            Operations 

We can perform operations on the data available. At the same time, not all operations can be performed on all sorts of data. That's what difference types make. You don't want to perform an addition operation between an Integer and a String literal. That's why the compiler does not allow us to do that. Even if it assumes you're trying to concatenate the string with the literal, it's not going to give you a result that's not meaningful. That's why defining types make sense.

Let's discuss a few terms that we just mentioned. It's really good that Scala is a statically typed language because it provides us compile time type safety. The code that we write is less prone to runtime errors, because we were so smart and we wrote it that way (we'll learn about...

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