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.
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 …
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.
control_expressions - Documentation for Ruby 3.4
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.
class Array - Documentation for Ruby 4.0
A number of Ruby methods, both in the core and in the standard library, provide instance method to_a, which converts an object to an array. ARGF#to_a Array#to_a Enumerable#to_a …
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 …
class Time - Documentation for Ruby 4.0
Ruby supports leap seconds as far as if the C function localtime and gmtime supports it. They use the tz database in most Unix systems. The tz database has timezones which supports leap …