Book Image

Polished Ruby Programming

By : Jeremy Evans
5 (1)
Book Image

Polished Ruby Programming

5 (1)
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 2: Designing Useful Custom Classes

In the previous chapter, you learned about how to get the most out of Ruby's core classes. However, outside of small scripts, you'll probably want to create your own classes to organize your code. How you design and structure your classes has a huge effect on how intuitive and maintainable your code is. This chapter will help you learn when a new class is a good idea, how to apply some important object-oriented design principles, how to determine class size, and whether it is worthwhile to introduce a custom data structure.

In this chapter, you'll learn the following principles for designing custom classes:

  • Learning when to create a custom class
  • Handling trade-offs in SOLID design
  • Deciding on larger classes or more classes
  • Learning when to use custom data structures

By the end of this chapter, you'll have a better understanding of the principles of Ruby class design and the trade-offs between...