Ruby-Doc.org

Core API

These are the API documents for the base classes and modules in the current stable release of Ruby 2.5.

• 2.5.1 core - Core API docs for Ruby 2.5.1 This is the current official release.
• 2.6.0.preview2 core - Core API docs for Ruby 2.6.0.preview2
• 2.5.0 core - Core API docs for Ruby 2.5.0
• 2.4.4 core - Core API docs for Ruby 2.4.4
• 2.4.3 core - Core API docs for Ruby 2.4.3
• 2.4.2 core - Core API docs for Ruby 2.4.2
• 2.4.1 core - Core API docs for Ruby 2.4.1
• 2.4.0 core - Core API docs for Ruby 2.4.0
• 2.3.7 core - Core API docs for Ruby 2.3.7
• 2.3.6 core - Core API docs for Ruby 2.3.6
• 2.3.5 core - Core API docs for Ruby 2.3.5
• 2.3.4 core - Core API docs for Ruby 2.3.4
• 2.3.3 core - Core API docs for Ruby 2.3.3
• 2.3.2 core - Core API docs for Ruby 2.3.2
• 2.3.1 core - Core API docs for Ruby 2.3.1
• 2.3.0 core - Core API docs for Ruby 2.3.0
• 2.2.10 core - Core API docs for Ruby 2.2.10
• 2.2.7 core - Core API docs for Ruby 2.2.7
• 2.2.6 core - Core API docs for Ruby 2.2.6
• 2.2.5 core - Core API docs for Ruby 2.2.5
• 2.2.4 core - Core API docs for Ruby 2.2.4
• 2.2.3 core - Core API docs for Ruby 2.2.3
• 2.2.2 core - Core API docs for Ruby 2.2.2
• 2.2.1 core - Core API docs for Ruby 2.2.1
• 2.2.0 core - Core API docs for Ruby 2.2.0
• 2.1.9 core - Core API docs for Ruby 2.1.9
• 2.1.8 core - Core API docs for Ruby 2.1.8
• 2.1.7 core - Core API docs for Ruby 2.1.7
• 2.1.6 core - Core API docs for Ruby 2.1.6
• 2.1.5 core - Core API docs for Ruby 2.1.5
• 2.1.4 core - Core API docs for Ruby 2.1.4
• 2.1.3 core - Core API docs for Ruby 2.1.3
• 2.1.2 core - Core API docs for Ruby 2.1.2
• 2.1.1 core - Core API docs for Ruby 2.1.1
• 2.1.0 core - Core API docs for Ruby 2.1.0
• 2.0.0 core - Core API docs for Ruby 2.0.0
• 1.9.3 core - Core API docs for Ruby 1.9.3 base classes and modules, such as String, Array, Symbol, etc.
• 1.9 keywords - Keywords defined in 1.9.
• MRuby core - Core API docs for MRuby (this is not an active release version).
• trunk-core - Core API docs for Ruby trunk (not yet officially released)
• 1.9.2 core - Core API docs for Ruby 1.9.2
• 1.9.1 core - Core API docs for Ruby 1.9.1
• 1.8.7 core - Core API docs for Ruby 1.8.7.
• 1.8.6 core - Core API docs for Ruby 1.8.6.

Standard Library API

These are the API documents for the standard library classes and modules in version 2.5

• The 2.5.1 standard library (this is the current official release)
  Additional libraries included with the standard Ruby distribution, such as CGI, OpenURI, and REXML
• The 2.6.0.preview2 standard library
• The 2.5.0 standard library
• The 2.4.4 standard library
• The 2.4.3 standard library
• The 2.4.2 standard library
• The 2.4.1 standard library
• The 2.4.0 standard library
• The 2.3.7 standard library
• The 2.3.6 standard library
• The 2.3.5 standard library
• The 2.3.4 standard library
• The 2.3.3 standard library
• The 2.3.2 standard library
• The 2.3.1 standard library
• The 2.3.0 standard library
• The 2.2.10 standard library
• The 2.2.7 standard library
• The 2.2.6 standard library
• The 2.2.5 standard library
• The 2.2.4 standard library
• The 2.2.3 standard library
• The 2.2.2 standard library
• The 2.2.1 standard library
• The 2.2.0 standard library
• The 2.1.9 standard library
• The 2.1.8 standard library
• The 2.1.7 standard library
• The 2.1.6 standard library
• The 2.1.5 standard library
• The 2.1.4 standard library
• The 2.1.3 standard library
• The 2.1.2 standard library
• The 2.1.1 standard library
• The 2.1.0 standard library
• The 2.0.0 standard library
• The 1.9.3 standard library
• The 1.9.2 standard library
• The 1.9.1 standard library
• The 1.8.7 standard library
• The 1.8.6 standard library
• The Ruby trunk standard library

Getting Started

A collection of resources for those just starting out with Ruby.

• Ruby 2.6 resources
  
  • Ruby 2.6.0 preview 2
  • The method JIT compiler for Ruby 2.6
• Programming Ruby
  An on-line copy of the first edition of the book Programming Ruby, by Dave Thomas.
• 10 Minutes to Your First Ruby Application
  Write a useful Ruby program that demonstrates key language concepts.
• Additional Documents
  A varied collection of other documents hosted on Ruby-Doc
• Downloads
  Various document sets and translated works, suitable for downloading for local perusal.
• Practicing Ruby
  A unique journal curated by Gregory Brown
• More ...

Docs in Other Languages

• French / Français
• German / Deutsch
• Bulgarian / български
• Spanish / Español
• Polish / Polski

Ruby Books

There are an increasing number of Ruby books. This section shows what's currently available.

• Programming Ruby
• The Ruby Way
• Learn to Program with Ruby
• More ...

Ruby Stuff

Help support this site - scope out the goods for sale at RubyStuff.

• Shirts
• Coffee mugs
• Mouse pads
• Thongs and boxers
• See all of the available designs

More Ruby-Doc

• Downloads
• The Ruby Specification Project