Book Image

Mastering Kotlin

By : Nate Ebel
Book Image

Mastering Kotlin

By: Nate Ebel

Overview of this book

Using Kotlin without taking advantage of its power and interoperability is like owning a sports car and never taking it out of the garage. While documentation and introductory resources can help you learn the basics of Kotlin, the fact that it’s a new language means that there are limited learning resources and code bases available in comparison to Java and other established languages. This Kotlin book will show you how to leverage software designs and concepts that have made Java the most dominant enterprise programming language. You’ll understand how Kotlin is a modern approach to object-oriented programming (OOP). This book will take you through the vast array of features that Kotlin provides over other languages. These features include seamless interoperability with Java, efficient syntax, built-in functional programming constructs, and support for creating your own DSL. Finally, you will gain an understanding of implementing practical design patterns and best practices to help you master the Kotlin language. By the end of the book, you'll have obtained an advanced understanding of Kotlin in order to be able to build production-grade applications.
Table of Contents (25 chapters)
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Section 1: Kotlin – A Modern Solution to Application Development
Section 2: Putting the Pieces Together – Modeling Data, Managing State, and Application Architecture
Section 3: Play Nice – Integrating Kotlin With Existing Code
Section 4: Go Beyond – Exploring Advanced and Experimental Language Features
Section 5: The Wide World of Kotlin – Using Kotlin across the Entire Development Stack

A function for every job – understanding function variations

In Kotlin, there are a number of function variations that we can write, and by leveraging these function types we can take advantage more fully of the Kotlin language.

In this section, we'll take a look at a number of the function types, including the following:

  • Top-level functions
  • Class functions
  • Local functions
  • Single expression functions
  • Infix functions
  • Extension functions

Top-level functions

Top-level functions are functions that are not tied to any class instance. These functions can be defined within any Kotlin file as independently callable functions, and can be made publicly available to the rest of your Kotlin code, depending on the defined...