Book Image

Functional Kotlin

Book Image

Functional Kotlin

Overview of this book

Functional programming makes your application faster, improves performance, and increases your productivity. Kotlin supports many of the popular and advanced functional features of functional languages. This book will cover the A-Z of functional programming in Kotlin. This book bridges the language gap for Kotlin developers by showing you how to create and consume functional constructs in Kotlin. We also bridge the domain gap by showing how functional constructs can be applied in business scenarios. We’ll take you through lambdas, pattern matching, immutability, and help you develop a deep understanding of the concepts and practices of functional programming. If you want learn to address problems using Recursion, Koltin has support for it as well. You’ll also learn how to use the funKtionale library to perform currying and lazy programming and more. Finally, you’ll learn functional design patterns and techniques that will make you a better programmer.By the end of the book, you will be more confident in your functional programming skills and will be able to apply them while programming in Kotlin.
Table of Contents (22 chapters)
Title Page
Copyright and Credits
Dedication
Packt Upsell
Contributors
Preface
Index

Chapter 6. Delegates in Kotlin

In the last two chapters, we learned about functions and function types in functional programming. We also learned about the various types of function Kotlin has to offer.

This chapter is based on delegates in Kotlin. Delegates are awesome features of Kotlin in favour of functional programming. If you are coming from a non-FP background such as Java, you are probably hearing about delegates for the first time. So in this chapter, we will try to untangle things for you.

We will start by learning the basics of delegation and then gradually move into implementations of delegates in Kotlin.

The following list contains the topics that will be covered in this chapter:

  • Introduction to delegation
  • Delegates in Kotlin
  • Delegated properties
  • Standard delegates
  • Custom delegates
  • Delegated map
  • Local delegation
  • Class delegation

So, let's get started with delegates.