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)
Free Chapter
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

Chapter 2: Programmer's Multi-Tool

  1. Can you name two programming paradigms that Kotlin supports?
  • Function, reactive, object-oriented
  1. Is it true or false that Kotlin requires everything to be contained within classes?
  • False
  1. What is a top-level function?
  • A function that exists independently of any containing class. Top-level functions are typically defined at the top of a .kt file, but can be placed anywhere within a .kt file as long as it's not within a class or object declaration.
  1. What are higher-order functions?
  • Functions that return other functions, or functions that take other functions as parameters.
  1. How do you declare a nullable type in Kotlin?
  • By adding a ? operator to the end of the type declaration, for example, String?.
  1. What are the three ways to handle null?
  • Using an it/else check
  • Using the Elvis operator
  • Using the let() function
  1. Is...