View source for Ruby (programming language)

{{distinguish|Ruby on Rails}}
{{infobox programming language
| name                   = Ruby
| logo                   = Ruby logo.svg
| paradigm               = [[Multi-paradigm programming language|multi-paradigm]]: [[Object-oriented programming|object-oriented]], [[Imperative programming|imperative]], [[Functional programming|functional]], [[Reflective programming|reflective]]
| scope                  = lexical, sometimes dynamic
| year                   = 1995
| designer               = [[Yukihiro Matsumoto]]
| developer              = Yukihiro Matsumoto, et al.
| latest_release_version = {{wikidata|property|reference|edit|P348}}
| latest_release_date    = {{start date and age|{{wikidata|qualifier|P348|P577}}}}
| typing                 = [[Duck typing|duck]], [[Dynamic typing|dynamic]]
| implementations        = [[Ruby MRI]], [[YARV]], [[Rubinius]], [[MagLev (software)|MagLev]], [[JRuby]], [[MacRuby]], [[RubyMotion]], [[HotRuby]], [[IronRuby]], [https://github.com/mruby/mruby mruby]
| influenced_by          = [[Ada (programming language)|Ada]],<ref name="nov2pro"/> [[C++]],<ref name="nov2pro"/> [[CLU (programming language)|CLU]],<ref name="bini"/> [[Dylan (programming language)|Dylan]],<ref name="bini"/> [[Eiffel (programming language)|Eiffel]],<ref name="nov2pro">{{cite book|last=Cooper|first=Peter|title=Beginning Ruby: From Novice to Professional|edition=2nd|series=Beginning from Novice to Professional|year=2009|publisher=[[Apress]]|location=Berkeley|isbn=978-1-4302-2363-4|page=101|quote=To a lesser extent, Python, LISP, Eiffel, Ada, and C++ have also influenced Ruby.}}</ref> [[Lisp (programming language)|Lisp]],<ref name="bini"/> [[Perl]],<ref name="bini"/> [[Python (programming language)|Python]],<ref name="bini"/> [[Smalltalk]]<ref name="bini">{{cite book|last=Bini|first=Ola|title=Practical JRuby on Rails Web 2.0 Projects: Bringing Ruby on Rails to Java|url=https://archive.org/details/practicaljrubyon00bini|year=2007|publisher=APress|location=Berkeley|isbn=978-1-59059-881-8|page=[https://archive.org/details/practicaljrubyon00bini/page/n30 3]|quote=It draws primarily on features from Perl, Smalltalk, Python, Lisp, Dylan, and CLU.}}</ref>
| influenced             = [[D (programming language)|D]],<ref>[http://www.digitalmars.com/d/1.0/ Intro – D Programming Language 1.0 – Digital Mars]</ref> [[Elixir (programming language)|Elixir]], [[Falcon (programming language)|Falcon]], [[Fancy (programming language)|Fancy]],<ref>{{cite web|url=http://rubini.us/2011/02/23/introduction-to-fancy/|title=Introduction to Fancy|last=Bertels|first=Christopher|date=23 February 2011|work=Rubinius blog|publisher=Engine Yard|accessdate=2011-07-21|archive-date=2018-12-25|archive-url=https://web.archive.org/web/20181225131621/https://rubinius.com/2011/02/23/introduction-to-fancy/%0A%20|url-status=dead}}</ref> [[Groovy (programming language)|Groovy]], [[Ioke (programming language)|Ioke]],<ref>{{cite web|url=http://ioke.org/|title=Ioke|last=Bini|first=Ola|work=Ioke.org|accessdate=2011-07-21|quote=inspired by Io, Smalltalk, Lisp and Ruby|archive-date=2011-07-21|archive-url=https://web.archive.org/web/20110721091046/http://www.ioke.org/|url-status=dead}}</ref> [[Mirah (programming language)|Mirah]], [[Nu (programming language)|Nu]],<ref>{{cite web|url=http://programming.nu/about|title=About Nu™|last=Burks|first=Tim|work=Programming Nu™|publisher=Neon Design Technology, Inc.|accessdate=2011-07-21|archive-date=2011-07-24|archive-url=https://web.archive.org/web/20110724191313/http://programming.nu/about|url-status=dead}}</ref> [[Reia (programming language)|Reia]], [[Crystal (programming language)|Crystal]]
| operating_system       = [[Cross-platform]]
| license                = [[Ruby License]] or [[BSD licenses|BSD License]]<ref>{{Cite web |url=http://svn.ruby-lang.org/cgi-bin/viewvc.cgi/trunk/COPYING?view=markup |title=COPYING in Ruby official source repository |access-date=2013-04-22 |archive-date=2017-03-20 |archive-url=https://web.archive.org/web/20170320052254/https://svn.ruby-lang.org/cgi-bin/viewvc.cgi/trunk/COPYING?view=markup |url-status=dead }}</ref><ref>{{Cite web |url=http://svn.ruby-lang.org/cgi-bin/viewvc.cgi/trunk/BSDL?view=markup |title=BSDL in Ruby official source repository |access-date=2013-04-22 |archive-date=2022-03-21 |archive-url=https://web.archive.org/web/20220321143246/https://svn.ruby-lang.org/cgi-bin/viewvc.cgi/trunk/BSDL?view=markup |url-status=dead }}</ref>
| website                = {{url|http://www.ruby-lang.org/}}
| file_ext               = .rb, .rbw
| wikibooks              = Ruby Programming
}}
'''Ruby''' is the name of a [[programming language]] that was created in the mid-1990s by [[Yukihiro Matsumoto|Yukihiro "Matz" Matsumoto]] in [[Japan]]. Like other programming languages, such as [[Python (programming language)|Python]], its [[structure]] (the way it works) is very similar to the [[English language]]. It has these [[qualities]]:

* [[Terse]]. Short, but still easy to understand.
* [[Dynamic]]. Easy to change, anytime and anywhere.
* [[Duck typing]]. If you think you understand it, you probably understand it.

Many programmers like it because the creator tried to make it easy and nice to use.<ref>{{cite web|url=http://www.ruby-lang.org/en/about/|title=About ruby}}</ref>

[[Ruby on Rails]] (RoR) is a [[web application framework]] that is implemented using the Ruby language.<ref>{{cite web | url=https://stackoverflow.com/questions/1237372/what-is-the-difference-between-ruby-and-ruby-on-rails | title=What is the difference between Ruby and Ruby on Rails? }}</ref>

== Example ==
An example [[Hello World]] program in Ruby:
<syntaxhighlight lang="ruby">
puts "Hello World!"
</syntaxhighlight>
An example program in Ruby that asks for your name and then says it:
<syntaxhighlight lang="ruby">
puts "What's your name?"
name = gets.chomp
puts "Ah hello there, #{name}"
</syntaxhighlight>
A function in Ruby that joins the 2 strings (or arrays/integers) into one, removes all numbers from it, capitalizes the string and then repeats it 5 times:
<syntaxhighlight lang="ruby">
def somefunction(arg1, arg2) # creates a function with 2 arguments. the args can be called anything
    arg = arg1 + arg2 # this joins them into 1 string
    arg = arg.tr("1234567890","") # this replaces all the numbers with a nothing. erases them essentially.
    arg = arg.capitalize # read that out loud
    5.times do # read that out loud too
        puts arg # prints it on a new line
    end
end
somefunction("h1e2l6lo7,"," W5o6r8l9d!3") # does the function
</syntaxhighlight>
Output:
<syntaxhighlight lang="text">
Hello, World!
Hello, World!
Hello, World!
Hello, World!
Hello, World!
</syntaxhighlight>

==References==
{{Reflist}}

==Other websites==
{{Commons category|Ruby programming language}}
{{Wikibooks|Ruby Programming}}
{{Wikiversity|Topic:Ruby}}
* {{official website|http://www.ruby-lang.org/en/}}
* [http://www.ruby-doc.org Ruby documentation site]
* [http://www.ipa.go.jp/osc/english/ruby/index.html Ruby Draft Specification- Sep 2010] {{Webarchive|url=https://web.archive.org/web/20120322021600/http://www.ipa.go.jp/osc/english/ruby/index.html |date=2012-03-22 }}
* [http://spec.ruby-doc.org/ Wiki: Ruby language and implementation specification] {{Webarchive|url=https://web.archive.org/web/20130411031838/http://spec.ruby-doc.org/ |date=2013-04-11 }}
* {{dmoz|Computers/Programming/Languages/Ruby|Ruby}}


{{tech-stub}}

{{DEFAULTSORT:Ruby (Programming Language)}}
[[Category:Multi-paradigm programming languages]]
[[Category:Object-oriented programming languages]]
[[Category:Functional languages]]