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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

Reactive programming

The best way to understand any new paradigm or concept is to reason about its existence. For this let's think of a very common and simple scenario, as shown here:

You might have come across the form behavior shown in the preceding figure. There's an agreement to read and then we click on the checkbox to agree to it so that we can proceed further. On the left-hand side, the checkbox is unchecked. Hence, based on its value, we have set the visibility of the Continue button (currently for the unchecked box) to false. Once we click and set the checkbox value to true, the visibility of the Continue button also becomes true. What is happening is when we click on checkbox, it emits an event with its value, that is, true/false. Now, based on its value, we can set the button's visibility to true/false. This is an example of observing events...

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