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


In this chapter, you learned all about optimization in Ruby. You learned that you should only optimize if you have identified a bottleneck in your application. You learned that you should profile and benchmark a specific use case before attempting to optimize the use case, so you can test that your optimization actually improved performance. Next, you learned that the best way to improve performance is by running the least amount of code possible. Finally, you learned some techniques and tricks for optimizing when the profile output isn't helpful in alerting you to the cause of the performance issue in your library.

You've now finished Section 2 of the book, and are ready to move on to the final part of the book, which focuses on principles of Ruby web programming, starting with the most important part, the database. In the next chapter, we will learn why the database is crucial to the design of web applications.