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)
1
Section 1: Fundamental Ruby Programming Principles
8
Section 2: Ruby Library Programming Principles
17
Section 3: Ruby Web Programming Principles

Chapter 5: Handling Errors

There are multiple ways to handle errors in your code. Most commonly in Ruby, errors are handled by raising exceptions, but there are other approaches used occasionally, such as returning nil for errors.

In this chapter, you'll learn about trade-offs in error handling, issues when handling transient errors with retries, and more advanced error handling such as exponential backoff and circuit breakers. You'll also learn how to design useful exception class hierarchies.

In this chapter, we will cover the following topics:

  • Handling errors with return values
  • Handling errors with exceptions
  • Retrying transient errors
  • Designing exception class hierarchies

By the end of this chapter, you'll have a better understanding of how best to handle errors in your Ruby programs.