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
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.
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.
module Math - Documentation for Ruby 4.0
See class Float for the constants that affect Ruby’s floating-point arithmetic. What’s Here Trigonometric Functions ::cos: Returns the cosine of the given argument. ::sin: Returns the …
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 …
strftime_formatting - Documentation for Ruby 4.0
Formats for Dates and Times Several Ruby time-related classes have instance method strftime, which returns a formatted string representing all or part of a date or time: Date#strftime. …
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
self. language = hash [:language] end end matz = Dev. new (name: 'Matz', language: 'Ruby') matz # => #<Dev: @name="Matz", @language="Ruby"> Creating a Hash You can create a Hash …
pattern_matching - Documentation for Ruby 4.0
For this case, the pin operator ^ can be used, to tell Ruby “just use this value as part of the pattern”: expectation = 18 case [1, 2] in ^expectation, *rest "matched. expectation was: …
class ERB - Documentation for Ruby 4.0
The Ruby Processing System RDoc, for example, has one that can be used elsewhere. Other popular template processors may found in the Template Engines page of the Ruby Toolbox.