Programming in Kotlin

Introduction

The book "Programming Kotlin" by Venkat Subramaniam is not just another language guide, but a deep and thoughtful immersion into the philosophy and capabilities of Kotlin. Published in 2019, it remains relevant today, as Kotlin has firmly established itself in Android development, backend, and even data science. The author, known for his work on Java and functional programming, offers the reader not a dry listing of syntax, but a meaningful approach to writing clean, safe, and expressive code.

What This Book Is About

The book covers all key aspects of the Kotlin language: from basic syntax to advanced concepts like coroutines and DSL. Special attention is paid to null safety, functional approaches (lambdas, higher-order functions), the type system, and interoperability with Java. The author consistently reveals how Kotlin solves many problems inherent in Java and how to write idiomatic code in the new language.

Who This Book Is For

The book is aimed at experienced Java developers who want to quickly and effectively learn Kotlin. It will also be useful for those already familiar with the basics of Kotlin but looking to delve into advanced topics. Beginners in programming may find the book challenging due to the abundance of terms and the assumption of JVM knowledge.

What the Reader Will Learn

• Syntax basics: variables, functions, classes, objects, data types.
• Null safety: how Kotlin eliminates NullPointerException at the type level.
• Functional programming: lambdas, higher-order functions, immutability.
• Type system: generics, variance, type aliases.
• Coroutines: asynchronous programming without callbacks.
• DSL: creating domain-specific languages in Kotlin.
• Interoperability with Java: how to call Java code from Kotlin and vice versa.
• Testing: writing tests using Kotlin style.

Strengths

The main advantage of the book is its clarity of presentation. Venkat Subramaniam knows how to explain complex concepts in simple terms, backing them up with clear examples. Each chapter contains practical exercises that help reinforce the material. The book is written in a lively language, without excessive academicism. Additionally, the author focuses on best practices and Kotlin idioms, allowing you to write quality code right away.

Who It Is Recommended For

I recommend this book to anyone who already has experience in Java or another JVM language and wants to switch to Kotlin. It will also be useful for Android developers striving to write safer and more concise code. If you are just starting to program, it is better to first learn the basics using simpler materials and then return to this book.

Overall, "Programming Kotlin" is an excellent choice for those who want not just to learn the syntax, but to understand the spirit of the language and learn to use its capabilities to the fullest.