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- index - Documentation for Ruby 4. 0
Use the following links to access the comprehensive set of libraries included with Ruby:
- About Ruby
Ruby, as a language, has a few different implementations This page has been discussing the reference implementation, in the community often referred to as MRI (“Matz’s Ruby Interpreter”) or CRuby (since it is written in C), but there are also others
- Documentation for Ruby 3. 4
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 Array - Ordered collections of objects Hash - Key-value pairs for efficient data retrieval Integer - Integer number class
- TryRuby: Learn programming with Ruby
Ruby is a programming language from Japan which is revolutionizing software development The beauty of Ruby is found in its balance between simplicity and power
- 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
- Documentation for Ruby
Ruby 3 1 (End of Support 2025-04) Ruby 3 0 (End of Support 2024-04) Ruby 2 7 (End of Support 2023-04) Ruby 2 6 (End of Support 2022-04) Ruby 2 5 (End of Support 2021-04) Ruby 2 4 (End of Support 2020-04) Ruby 2 3 (End of Support 2019-04) Ruby 2 2 (End of Support 2018-04) Ruby 2 1 (End of Support 2017-04)
- operators - Documentation for Ruby 4. 0
Operators In Ruby, operators such as +, are defined as methods on the class Literals define their methods within the lower level, C language String class, for example Ruby objects can define or overload their own implementation for most operators Here is an example:
- 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 DateTime#strftime Time#strftime Each of these methods takes optional argument format, which has zero or more embedded format specifications (see below)
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