The Koans walk you along the path to enlightenment in order to learn Ruby. The goal is to learn the Ruby language, syntax, structure, and some common functions and libraries.

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.

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 …

Ruby Documentation Welcome to the official Ruby programming language documentation. Getting Started New to Ruby? Start with our Getting Started Guide. Core Classes and …

Ruby code can raise exceptions. Most often, a raised exception is meant to alert the running program that an unusual (i.e., exceptional) situation has arisen, and may need to be handled.

This system is hosting the development of Ruby language and its related projects. You must register your account and activate it via an email before reporting issues.

Jul 15, 2025 · We intend to release the latest stable Ruby version (currently Ruby 3.4) every two months following the most recent release. Ruby 3.4.6 is scheduled for September, 3.4.7 for …

The Ruby Standard Library is a large collection of classes and modules you can require in your code to gain additional features. Below is an overview of the libraries and extensions, followed …

However, by convention, a method with an exclamation point or bang is considered dangerous. In Ruby’s core library the dangerous method implies that when a method ends with a bang (!), it …

person = {name: 'Matz', language: 'Ruby'} person # => {name: "Matz", language: "Ruby"} You can use a hash to give names to method arguments: def some_method (hash) p hash end …