Explore options for asynchrony in Ruby, including threads, mutexes, queues, Reactors, Futures, Promises, Fibers, Guilds and much more.

A garden tour of programming languages, from a Rubyist's perspective.

Build, retrieve, search, transform, and reduce over collections of data in fluent, expressive, idiomatic Ruby.

Learn to use Ruby's most fundamental object types and methods with clarity and style. Enrich your vocabulary, and speak Ruby as a native!

Understand Ruby better by digging deep into internals, implementations, and extending the language.

Learn robust and flexible patterns for modeling your business domain in idiomatic Ruby code.

A handpicked toolbox of Ruby libraries that will make your life easier.

The course after the intro-to-Ruby course!

Apply functional ideas like Referential Transparency, Immutability, Functional Composition, and Pattern-Matching in practical, idiomatic Ruby code

Learn about common attack vectors and how to code defensively against them!

"What's going on in there?" Ruby can usually answer the question for you... if you know how to ask. This course on diagnostics, debugging, and dynamic exploration will equip you to ask your programs to explain themselves.

Investigative debugging is the practice of using the full diagnostic arsenal at our disposal, along with our special privileges as machine operators, to understand code by surveilling it.

It's time to make objects work for you.

Learn to use Ruby's rich metaprogramming capabilities to augment the language - safely and sustainably.

Ruby modules are the foundational concept for code decomposition and organization, metaprogramming, and object-oriented classes. Get a deep understanding of modules and code-loading in Ruby, and you'll write stronger code!

Work skillfully with the filesystem, data storage formats, and databases in Ruby.

There are some lessons that will serve you no matter what programming language or framework you're working in. Follow this garden path for diverse inspiration on coding style, testing philosophy, working as a team, and furthering your career!

Master the art of code construction in Ruby: learn micro-patterns, idioms, and refactoring techniques to guide you through the myriad tiny questions that make up the day-to-day of coding.

Go from zero to committing in half an hour. Develop in the cloud. Share your development environment improvements with everyone on your team, instantly. Make development environment setup a non-event. For a preview, see Avdi's QCon Talk and InfoQ Article on Devcontainers.

Design, verify, and safely refactor your Ruby code using mature testing disciplines and practices.