Autorentext

David A. Black is a well-known Ruby programmer, trainer, speaker, author, and event organizer. He was one of the founders of Ruby Central, Inc., the parent organization of the annual international RubyConf.

Joseph Leo III is the founder and owner of Def Method, a New York City-based Ruby on Rails consultancy dedicated to building high-quality, thoughtfully crafted software. He has over 20 years of experience as a software developer, engineering leader, and Ruby community organizer.

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For over fifteen years, The Well-Grounded Rubyist has taught beginner and developing Ruby programmers the veteran secrets of Ruby. This new fourth edition of the groundbreaking classic goes beyond syntax and commands into how a Rubyist really thinks. Fully updated for Ruby 3.4, this approachable guide shows you Ruby principles in a way that’s friendly, clear, and packed with code samples.

You don’t need to know every Ruby function or add-on library to be a well-grounded Rubyist. All you need is to properly understand the principles that underpin Ruby code! This book highlights the most useful parts of the language with examples designed to spark “aha!” moments. This is not a dry syntax reference or overly technical deep dive. You’ll go from your first Ruby program all the way to sophisticated topics like reflection, threading, and recursion.

You’ll learn how to:

 • Master Ruby’s object-oriented core, including classes, modules, and message passing
 • Work with Ruby’s built-in types: strings, symbols, arrays, hashes, and numerics
 • Use RubyGems to install, share, and manage libraries
 • Organize your code with classes, modules, and mixins
 • Write clean, expressive Ruby with functional techniques and blocks
 • Harness regular expressions and file/keyboard I/O for real-world tasks

About the book

In The Well-Grounded Rubyist, Fourth Edition expert Rubyists David A. Black and Joseph Leo III distill their years of knowledge into an easy-to-read, casual style. Everything you learn is useful and instantly applicable to your day-to-day work as a Ruby developer. You’ll explore the underpinnings of Ruby’s object system, learn how Ruby resolves messages into method calls, and discover why Rubyists think differently about problem solving than programmers in other languages.

About the reader

For programmers looking to start working with Ruby, or deepen their understanding of the language.

About the author

David A. Black is a well-known Ruby programmer, trainer, speaker, author, and event organizer. He was one of the founders of Ruby Central, Inc., the parent organization of the annual international RubyConf.

Joseph Leo III is the founder and owner of Def Method, a New York City-based Ruby on Rails consultancy dedicated to building high-quality, thoughtfully crafted software. He has over 20 years of experience as a software developer, engineering leader, and Ruby community organizer.