Ruby Programming Language
Ruby is... A dynamic, open source programming language with a focus on simplicity and productivity. It has an elegant syntax that is natural to read and easy to write. Download Ruby …
Download Ruby
See the Installation page for details on building Ruby from source. If you have an issue compiling Ruby, consider using one of the third party tools mentioned above.
index - Documentation for Ruby 4.0
Ruby Documentation Welcome to the official Ruby programming language documentation. Getting Started New to Ruby? Start with our Getting Started Guide. Core Classes and …
class Regexp - Documentation for Ruby 4.0
Note that this is a property of the ruby interpreter, not of the argument regular expression. Identical regexp can or cannot run in linear time depending on your ruby binary.
Ruby 3.4.5 Released - Ruby Programming Language
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 …
class String - Documentation for Ruby 4.0
Encoding. default_internal = 'UTF-8' t = s. encode # => "Ruby™" t. encoding # => #<Encoding:UTF-8> With only argument dst_encoding given, uses that encoding:
class Hash - Documentation for Ruby 4.0
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 …
control_expressions - Documentation for Ruby 4.0
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.
exceptions - Documentation for Ruby 4.0
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.
class Hash - Documentation for Ruby 2.0.0
books [: matz] = "The Ruby Language" books [: black] = "The Well-Grounded Rubyist" Hashes are also commonly used as a way to have named parameters in functions.