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 8. Collections and Data Operations in Kotlin

In the previous chapters, we have covered a wide range of topics, starting from data types, classes, and objects in Kotlin and moving on to immutability, functions, delegates, and coroutines in the last chapter. In this chapter, we are going to discuss the collections framework and data operations in Kotlin. Kotlin inherits collections framework from Java, but has significant changes from it in favor of functional programming.

The collections framework that Kotlin provides is more functional than Java and, as the signature of Kotlin, it is easier to use and understand.

We will start this chapter with the fundamentals of collections and gradually move on to data operations that collections support in Kotlin. The following is the list of topics that we are going to cover in this chapter:

  • An introduction to collections
  • The Iterator and Iterable interfaces
  • Collection types in Kotlin—Array, List, Map, and Set
  • Mutability and immutability
  • Working with...