Essential Ruby

This book covers the most essential concepts in Ruby. The goal is to provide a solid foundation to build upon. This book distills my Ruby programming knowledge into a concise and easy-to-read format. Repetition is key to learning Ruby. We will visit the concepts from different angles. You will get the most benefit out of the book if you work through every example as you read through the book.

There are four sections in this book. Section 1 introduces the basic Object Oriented Programming (OOP). Section 2 covers the required concepts to understand Ruby. Section 3 provides the basics needed to learn the Ruby Object Model. Section 4 revisits OOP concepts required to clarify the reader's questions.

Each early chapters are as small as possible and focuses on explaining one concept at a time. Gradually the later chapters increase in complexity and introduce readers to subtle concepts. These subtle concepts are not discussed in any of the current books on Ruby. This book uses Ruby 2.3.0.