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Ruby is an open source programming language created in 1995 by Yukihiro Matsumoto.

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git clone https://github.com/ruby/ruby
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Ruby is a dynamic, reflective, object-oriented, general-purpose programming language. It was designed and developed in the mid-1990s by Yukihiro "Matz" Matsumoto in Japan. According to its creator, Ruby was influenced by Perl, Smalltalk, Eiffel, Ada, and Lisp. Read more on Wikipedia...


Example from Compiler Explorer:
# Type your code here, or load an example. def square(num) num * num end
Example from Riju:
puts "Hello, world!"
Example from hello-world:
#!/usr/bin/env ruby print "Hello World"
# Hello World in Ruby puts "Hello World!"
Example from Linguist:
module Foo end
Example from Wikipedia:
"Hello, World!".in_blue => "<span style=\"color: #00f\">Hello, World!</span>"
__ENCODING__ __FILE__ __LINE__ alias and BEGIN begin break case class def defined do else elsif END end ensure false for if in module next nil not or redo rescue retry return self super then true undef unless until when while yield

Language features

Feature Supported Example Token
Standard Library puts "Hello, World!"
Conditionals
Functions
While Loops
Case Sensitivity
Range Operator (3...6)
Line Comments # A comment #
Print() Debugging puts "Hi" puts
Operator Overloading
Multiline Strings
Mixins module A def a1 end def a2 end end module B def b1 end def b2 end end class Sample include A include B def s1 end end samp = Sample.new samp.a1 samp.a2 samp.b1
Iterators (0...42).each do |n| puts n end
File Imports load 'filename.rb' require 'filename' require 'trig.rb'
Directives coding: UTF-8
Here Document
Generators # Generator from an Enumerator object chars = Enumerator.new(['A', 'B', 'C', 'Z']) 4.times { puts chars.next } # Generator from a block count = Enumerator.new do |yielder| i = 0 loop { yielder.yield i += 1 } end 100.times { puts count.next }
Garbage Collection
MultiLine Comments =begin A comment. =end =begin =end
Comments # A comment
Classes # A tiny Person class in Ruby: class Person attr_accessor :name, :age, : # getter and setter methods def initialize(name, age) @name = name @age = age end end # Create a new Person object: person = Person.new("John", 30) puts person.name puts person.age # Change the age of the person: person.age = 35 puts person.age
Constants # Constants in Ruby being with a capital letter. Will throw a warning or error, depending on runtime settings. Name = "John" # Not a constant name = "John"
Exceptions def hello puts "Hello, World!" # start an exception handler begin raise "This is an exception" rescue => e puts "Exception caught: #{e}" end end hello
Assignment pldb = 80766866
Booleans true false
Integers pldb = 80766866
Duck Typing
Regular Expression Syntax Sugar puts "Hello World".match(/\w/)
Strings "hello world" "
Case Insensitive Identifiers X
Semantic Indentation X
Async Await X
Function Overloading X
Dispose Blocks Pattern X
Dependent types X
Enums X
Variable Substitution Syntax X

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