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Core API

These are the API documents for base classes and modules in the current stable release of Ruby 3.0.3

• 3.0.3 core - Core API docs for Ruby 3.0.3 This is the current official release.
• 3.1.0_preview1 core - Core API docs for Ruby 3.1.0_preview1
• 3.0.2 core - Core API docs for Ruby 3.0.2
• 3.0.0 core - Core API docs for Ruby 3.0.0
• 2.7.5 core - Core API docs for Ruby 2.7.5
• 2.7.4 core - Core API docs for Ruby 2.7.4
• 2.7.3 core - Core API docs for Ruby 2.7.3
• 2.7.2 core - Core API docs for Ruby 2.7.2
• 2.7.1 core - Core API docs for Ruby 2.7.1
• 2.7.0 core - Core API docs for Ruby 2.7.0
• 2.6.9 core - Core API docs for Ruby 2.6.9
• 2.6.8 core - Core API docs for Ruby 2.6.8
• 2.6.8 core - Core API docs for Ruby 2.6.8
• 2.6.7 core - Core API docs for Ruby 2.6.7
• 2.6.6 core - Core API docs for Ruby 2.6.6
• 2.6.5 core - Core API docs for Ruby 2.6.5
• 2.6.4 core - Core API docs for Ruby 2.6.4
• 2.6.3 core - Core API docs for Ruby 2.6.3
• 2.6.2 core - Core API docs for Ruby 2.6.2
• 2.6.1 core - Core API docs for Ruby 2.6.1
• 2.6 core - Core API docs for Ruby 2.6
• 2.5.9 core - Core API docs for Ruby 2.5.9
• 2.5.8 core - Core API docs for Ruby 2.5.8
• 2.5.7 core - Core API docs for Ruby 2.5.7
• 2.5.6 core - Core API docs for Ruby 2.5.6
• 2.5.5 core - Core API docs for Ruby 2.5.5
• 2.5.4 core - Core API docs for Ruby 2.5.4
• 2.5.3 core - Core API docs for Ruby 2.5.3
• 2.5.2 core - Core API docs for Ruby 2.5.2
• 2.5.1 core - Core API docs for Ruby 2.5.1
• 2.5.0 core - Core API docs for Ruby 2.5.0
• 2.4.10 core - Core API docs for Ruby 2.4.10
• 2.4.9 core - Core API docs for Ruby 2.4.9
• 2.4.8 core - Core API docs for Ruby 2.4.8
• 2.4.7 core - Core API docs for Ruby 2.4.7
• 2.4.6 core - Core API docs for Ruby 2.4.6
• 2.4.5 core - Core API docs for Ruby 2.4.5
• 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
• 2.3.8 core - Core API docs for Ruby 2.3.8
• 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 3.0.3

• The 3.0.3 standard library (this is the current official release)
  Additional libraries included with the standard Ruby distribution, such as CGI, OpenURI, and REXML
• The 3.1.0_preview1 standard library
• The 3.0.2 standard library
• The 3.0.0 standard library
• The 2.7.5 standard library
• The 2.7.4 standard library
• The 2.7.3 standard library
• The 2.7.2 standard library
• The 2.7.1 standard library
• The 2.7.0 standard library
• The 2.6.9 standard library
• The 2.6.8 standard library
• The 2.6.8 standard library
• The 2.6.7 standard library
• The 2.6.6 standard library
• The 2.6.5 standard library
• The 2.6.4 standard library
• The 2.6.3 standard library
• The 2.6.2 standard library
• The 2.6.1 standard library
• The 2.6 standard library
• The 2.5.9 standard library
• The 2.5.8 standard library
• The 2.5.7 standard library
• The 2.5.6 standard library
• The 2.5.5 standard library
• The 2.5.4 standard library
• The 2.5.3 standard library
• The 2.5.2 standard library
• The 2.5.1 standard library
• The 2.5.0 standard library
• The 2.4.10 standard library
• The 2.4.9 standard library
• The 2.4.8 standard library
• The 2.4.7 standard library
• The 2.4.6 standard library
• The 2.4.5 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 2.3.8 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.

• 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 ...

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