Functional programming: Difference between revisions

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=== Industry ===

Functional programming has been employed in a wide range of industrial applications. For example, [[Erlang (programming language)|Erlang]], which was developed by the [[Sweden|Swedish]] company [[Ericsson]] in the late 1980s, was originally used to implement [[Fault tolerance|fault-tolerant]] [[telecommunicationtelecommunications]]s systems,<ref name="armstrong2007"/> but has since become popular for building a range of applications at companies such as [[Nortel]], [[Facebook]], [[Électricité de France]] and [[WhatsApp]].<ref name="erlang-faq"/><ref name="larson2009"/><ref>{{cite conference |last=Piro |first=Christopher |title=Functional Programming at Facebook |url=http://cufp.galois.com/2009/abstracts.html#ChristopherPiroEugeneLetuchy |year=2009 |conference=CUFP 2009 |access-date=2009-08-29 |archive-url=https://web.archive.org/web/20091017070140/http://cufp.galois.com/2009/abstracts.html#ChristopherPiroEugeneLetuchy |archive-date=2009-10-17 |url-status=dead }}</ref><ref name="Sim-Diasca"/><ref name="whatsapp.blog.2012">[http://blog.whatsapp.com/index.php/2012/01/1-million-is-so-2011/ 1 million is so 2011] {{Webarchive|url=https://web.archive.org/web/20140219234031/http://blog.whatsapp.com/index.php/2012/01/1-million-is-so-2011/ |date=2014-02-19}} // WhatsApp blog, 2012-01-06: "the last important piece of our infrastracture is Erlang"</ref> [[Scheme (programming language)|Scheme]], a dialect of [[Lisp (programming language)|Lisp]], was used as the basis for several applications on early [[Apple Macintosh]] computers<ref name="clinger1987"/><ref name="hartheimer1987"/> and has been applied to problems such as training-[[Computer simulation|simulation software]]<ref name="kidd2007"/> and [[telescope]] control.<ref name="cleis2006"/> [[OCaml]], which was introduced in the mid-1990s, has seen commercial use in areas such as financial analysis,<ref name="minksy2008"/> [[software driver|driver]] verification, industrial [[robot]] programming and static analysis of [[embedded software]].<ref name="leroy2007"/> [[Haskell]], though initially intended as a research language,<ref name="hudak2007"/> has also been applied in areas such as aerospace systems, hardware design and web programming.<ref name="haskell-industry"/><ref name="hudak2007"/>

Other functional programming languages that have seen use in industry include [[Scala (programming language)|Scala]],<ref>{{cite conference |last=Momtahan |first=Lee |title=Scala at EDF Trading: Implementing a Domain-Specific Language for Derivative Pricing with Scala |url=http://cufp.galois.com/2009/abstracts.html#LeeMomtahan |year=2009 |conference=CUFP 2009 |access-date=2009-08-29 |archive-url=https://web.archive.org/web/20091017070140/http://cufp.galois.com/2009/abstracts.html#LeeMomtahan |archive-date=2009-10-17 |url-status=dead }}</ref> [[F Sharp (programming language)|F#]],<ref name='quantFSharp'/><ref name='businessAppsFSharp'/> [[Wolfram Language]],<ref name="reference.wolfram.com"/> [[Lisp (programming language)|Lisp]],<ref>{{cite web |last=Graham |first=Paul |title=Beating the Averages |url=http://www.paulgraham.com/avg.html |year=2003 |access-date=2009-08-29}}</ref> [[Standard ML]]<ref>{{cite conference |last=Sims |first=Steve |title=Building a Startup with Standard ML |url=http://cufp.galois.com/2006/slides/SteveSims.pdf |year=2006 |conference=CUFP 2006 |access-date=2009-08-29}}</ref><ref>{{cite conference |last=Laurikari |first=Ville |title=Functional Programming in Communications Security. |url=http://cufp.galois.com/2007/abstracts.html#VilleLaurikari |year=2007 |conference=CUFP 2007 |access-date=2009-08-29 |archivedate=2010-12-21 |archiveurl=https://web.archive.org/web/20101221110947/http://cufp.galois.com/2007/abstracts.html#VilleLaurikari |url-status=dead }}</ref> and Clojure.<ref>{{cite web |url=http://www.infoq.com/news/2009/01/clojure_production |last=Lorimer |first=R. J. |title=Live Production Clojure Application Announced |date=19 January 2009|work=InfoQ}}</ref> Scala has been widely used in [[Data science]],<ref>{{Cite book |last=Bugnion |first=Pascal |title=Scala for Data Science |publisher=[[Packt]] |year=2016 |isbn=9781785281372 |edition=1st |language=en-US}}</ref> while [[ClojureScript]],<ref>{{Cite web |title=Why developers like ClojureScript |url=https://stackshare.io/clojurescript |access-date=2024-04-29 |website=StackShare |language=en}}</ref> [[Elm (programming language)|Elm]]<ref>{{Citation |last=Herrick |first=Justin |title=jah2488/elm-companies |date=2024-04-29 |url=https://github.com/jah2488/elm-companies |access-date=2024-04-29}}</ref> or [[PureScript]]<ref>{{Cite web |title=Why developers like PureScript |url=https://stackshare.io/purescript |access-date=2024-04-29 |website=StackShare |language=en}}</ref> are some of the functional frontend programming languages used in production. [[Elixir (programming language)|Elixir]]'s Phoenix framework is also used by some relatively popular commercial projects, such as [[Font Awesome]] or [[Allegro Platform|Allegro]] (one of the biggest e-commerce platforms in Poland)<ref>{{Cite web |last=Team |first=Editorial |date=2019-01-08 |title=ALLEGRO - all you need to know about the best Polish online marketplace |url=https://ecommercegermany.com/blog/allegro-all-you-need-to-know-about-the-best-polish-online-marketplace |access-date=2024-04-29 |website=E-commerce Germany News |language=en-US}}</ref>'s classified ads platform ''Allegro Lokalnie.''<ref>{{Cite web |title=Websites using Phoenix Framework - Wappalyzer |url=https://www.wappalyzer.com/technologies/web-frameworks/phoenix-framework/ |access-date=2024-04-29 |website=www.wappalyzer.com}}</ref>