Ruby Documentation Welcome to the official Ruby programming language documentation. Getting Started New to Ruby? Start with our Getting Started Guide. Core Classes and Modules Explore the essential classes and modules: String - Text manipulation and string utilities. Symbol - Named identifiers inside the Ruby interpreter.
Identical regexp can or cannot run in linear time depending on your ruby binary. Neither forward nor backward compatibility is guaranteed about the return value of this method.
Ruby is a simple and powerful object-oriented programming language, created by Yukihiro Matsumoto (who goes by the handle “Matz” in this document and on the mailing lists).
Ruby was first developed by Matz (Yukihiro Matsumoto) in 1993, and is now developed as Open Source. It runs on multiple platforms and is used all over the world especially for web development.
As with most programming languages, Ruby leverages a wide set of third-party libraries. Nearly all of these libraries are released in the form of a gem, a packaged library or application that can be installed with a tool called RubyGems.
Ruby 3.1.7 has been released. This release includes CVE-2025-27219, CVE-2025-27220 and CVE-2025-27221 fixes and update bundled REXML and RSS gems. Please see the GitHub releases for further details. This version is a final release of Ruby 3.1 series. We will not provide any further updates including security fixes for Ruby 3.1 series.
Ruby’s grammar differentiates between statements and expressions. All expressions are statements (an expression is a type of statement), but not all statements are expressions.
In the simplest case, the dumped string contains the original string, enclosed in double-quotes; this example is done in irb (interactive Ruby), which uses method ‘inspect` to render the results:
We intend to release the latest stable Ruby version (currently Ruby 3.4) every two months following the most recent release. Following this release (3.4.4), Ruby 3.4.5 is scheduled for July, 3.4.6 for September, 3.4.7 for November, and 3.4.8 for January.
