Book Image

Kotlin Programming Cookbook

By : Aanand Shekhar Roy, Rashi Karanpuria
Book Image

Kotlin Programming Cookbook

By: Aanand Shekhar Roy, Rashi Karanpuria

Overview of this book

The Android team has announced first-class support for Kotlin 1.1. This acts as an added boost to the language and more and more developers are now looking at Kotlin for their application development. This recipe-based book will be your guide to learning the Kotlin programming language. The recipes in this book build from simple language concepts to more complex applications of the language. After the fundamentals of the language, you will learn how to apply the object-oriented programming features of Kotlin 1.1. Programming with Lambdas will show you how to use the functional power of Kotlin. This book has recipes that will get you started with Android programming with Kotlin 1.1, providing quick solutions to common problems encountered during Android app development. You will also be taken through recipes that will teach you microservice and concurrent programming with Kotlin. Going forward, you will learn to test and secure your applications with Kotlin. Finally, this book supplies recipes that will help you migrate your Java code to Kotlin and will help ensure that it's interoperable with Java.
Table of Contents (21 chapters)
Title Page
Copyright and Credits
Packt Upsell
Contributors
Preface
Index

How to iterate over a class's properties in Kotlin


Reflections in Kotlin allows us introspection of the structure of our program at runtime. This also enables us to introspect the class modifiers, methods, and properties. In this recipe, we will see how we can iterate over the properties of a Kotlin class. So let’s get started!

Getting ready

We’ll be using IntelliJ IDEA IDE for coding purposes. We will create a Student class, which will have the roll_number and name properties. We will then see how we can iterate over its properties.

If you are not using IntelliJ IDE or Android Studio, you might need to include reflection library in your classpath. Head on over to https://kotlinlang.org/docs/reference/reflection.html to learn more about this.

How to do it...

In the following steps, we will see how to iterate over a class's properties:

  1. Here's our Student class with the roll_number and full_name attributes:
class Student constructor(var roll_number:Int, var full_name:String)
  1. Now, we will be using...