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Installing Ruby If you cannot compile your own Ruby, and you do not want to use a third-party tool, you can use your system’s package manager to install Ruby Some members of the Ruby community feel that you should avoid package managers to install Ruby and that you should use dedicated tools instead
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 Modules Explore the essential classes and modules: String - Text manipulation and string utilities Symbol - Named identifiers inside the Ruby interpreter
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
Documentation for Ruby 3. 4 Ruby Documentation Welcome to the official Ruby programming language documentation Getting Started 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
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:
Ruby From Other Languages Much of the syntax is familiar to users of Perl, Python, and Java (among other languages), so if you’ve used those, learning Ruby will be a piece of cake This document contains two major sections
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 sine of the given argument ::tan: Returns the tangent of the given argument Inverse Trigonometric Functions ::acos: Returns the arc cosine of the given
literals - Documentation for Ruby 4. 0 Symbol Literals A Symbol represents a name inside the ruby interpreter See Symbol for more details on what symbols are and when ruby creates them internally You may reference a symbol using a colon: :my_symbol You may also create symbols by interpolation and escape sequences described in Escape Sequences with double-quotes:
methods - Documentation for Ruby 4. 0 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 indicates that unlike its non-bang equivalent, permanently modifies its receiver
class Net::HTTPSession - Documentation for Ruby 4. 0 It consists of some or all of: scheme, hostname, path, query, and fragment; see URI syntax A Ruby URI::Generic object represents an internet URI It provides, among others, methods scheme, hostname, path, query, and fragment Schemes An internet URI has a scheme The two schemes supported in Net::HTTP are 'https' and 'http':