Book Image

Polished Ruby Programming

By : Jeremy Evans
Book Image

Polished Ruby Programming

By: Jeremy Evans

Overview of this book

Anyone striving to become an expert Ruby programmer needs to be able to write maintainable applications. Polished Ruby Programming will help you get better at designing scalable and robust Ruby programs, so that no matter how big the codebase grows, maintaining it will be a breeze. This book takes you on a journey through implementation approaches for many common programming situations, the trade-offs inherent in each approach, and why you may choose to use different approaches in different situations. You'll start by refreshing Ruby fundamentals, such as correctly using core classes, class and method design, variable usage, error handling, and code formatting. Then you'll move on to higher-level programming principles, such as library design, use of metaprogramming and domain-specific languages, and refactoring. Finally, you'll learn principles specific to web application development, such as how to choose a database and web framework, and how to use advanced security features. By the end of this Ruby programming book, you’ll be a well rounded web developer with a deep understanding of Ruby. While most code examples and principles discussed in the book apply to all Ruby versions, some examples and principles are specific to Ruby 3.0, the latest release at the time of publication.
Table of Contents (23 chapters)
Section 1: Fundamental Ruby Programming Principles
Section 2: Ruby Library Programming Principles
Section 3: Ruby Web Programming Principles

Chapter 8: Designing for Extensibility

Most decent-sized libraries benefit from being designed upfront for extensibility. The larger the library, the more it benefits from extensible design. In this chapter, you'll learn how to make your libraries extensible, with a full discussion on implementing a plugin system to do so. You'll also learn how restricting mutability can result in more maintainable libraries that are easier to understand.

In this chapter, we will cover the following topics:

  • Using Ruby's extensibility features
  • Designing plugin systems
  • Understanding globally frozen, locally mutable design

By the end of this chapter, you'll be close to an expert in plugin system design.