The Ruby Reference
FreeFree, open-source reference for Ruby 2.7
FreeFree tier
About The Ruby Reference
The Ruby Reference is a comprehensive, up-to-date reference book for the Ruby programming language (currently covering Ruby 2.7). It describes the language structure, core classes, and standard library, and includes additional useful information and links for Ruby development. The content is primarily taken from official Ruby documentation, reorganized for easier reading, with some quotes from the Ruby website and unique content written specifically for the book. The source code is available on GitHub, making it an open-source resource for Ruby developers.
Key Features
Comprehensive reference for Ruby language structure
Covers core classes and standard library
Up-to-date with current Ruby version (2.7)
Reorganized from official Ruby documentation for easier reading
Includes quotes from Ruby website and original content
Open source on GitHub for community contributions
Pros & Cons
Pros
- Free and open source
- Comprehensive coverage of Ruby 2.7
- Well-organized from official docs
- Includes additional original content
- Available on GitHub for contributions
Cons
- Only covers Ruby 2.7 (may be outdated for newer versions)
- Not an interactive tool; static reference content only
- Limited to the reference format; no tutorials or exercises
Best For
Learning Ruby programming languageQuick reference for experienced Ruby developersConsulting Ruby documentation in an organized formatTeaching Ruby in educational settings
FAQ
What is The Ruby Reference?
The Ruby Reference is a free, open-source reference book for the Ruby programming language, covering language structure, core classes, and standard library.
Is The Ruby Reference free?
Yes, it is completely free and open source. The source is available on GitHub.
What Ruby version does it cover?
As indicated on the homepage, it covers Ruby 2.7.
Where can I find the source code?
The source code (rendering scripts, config, and unique content) is hosted on GitHub at rubyreferences.github.io/rubyref/.