Sswc 2011 scrive loves haskell social swedish webcamp emily green heidi harman

We ♥ Haskell ------------------ by @heidiHarman & @greenEmilyMay @scriveMonday, August 15, 2011

We ♥ Haskell ------------------ The story behind SkrivaPå and more about HaskellMonday, August 15, 2011

@heidiHarman & @greenEmilyMay @scrive @skrivaPa @scrive_UK Emily Green Heidi Harman :: JavaDev -> HaskellDev -> _ Kaospilot, Denmark ServerCode _ Planner, projectmanager = :: BristolUni -> Maths -> Degree webagencies :: JQuery -> CSS -> GUICode _ IFL Stockholm School of Economics :: Bank -> Scrive -> Happy _ Agencies _ Runalong Startup _ GeekGirlMeetup _ London, ScriveMonday, August 15, 2011

Structure allows freedomMonday, August 15, 2011

Or as Björk would have put it: “I tried organizing freedom, how scandinavian of me”Monday, August 15, 2011

SkrivaPå aka Scrive Digital signatures for contracts etcMonday, August 15, 2011

@heidiHarman & @greenEmilyMay @scrive @skrivaPa @scrive_UK Why SkrivaPå? > Proven business model and product > A fantastic TeamMonday, August 15, 2011

@heidiHarman & @greenEmilyMay @scrive @skrivaPa @scrive_UK Why SkrivaPå? Yes, it’s as simple as that! > Proven business model and product > A fantastic TeamMonday, August 15, 2011

@heidiHarman & @greenEmilyMay @scrive @skrivaPa @scrive_UK Tibetan Patches 3 3 3 1Monday, August 15, 2011

@heidiHarman & @greenEmilyMay @scrive @skrivaPa @scrive_UK We Use Haskell Because the CTO, Gracjan, wanted to. “Haskell, whatʼs that?” > Itʼs a strongly typed, lazily evaluated, functional language. “Haskell, thatʼs a brave choice.” > Itʼs well-known and loved in academic circles, but a bit unusual of an unusual choice for building “real stuff”.Monday, August 15, 2011

@heidiHarman & @greenEmilyMay @scrive @skrivaPa @scrive_UK Can I Describe What itʼs Like? Imagine: Variables canʼt change value. Once you set the value of a variable you canʼt change it. Ever. (If you ask me how to keep an incrementing count of user logins, I shall say “monads”.)Monday, August 15, 2011

@heidiHarman & @greenEmilyMay @scrive @skrivaPa @scrive_UK Functions Only :: Input -> AnotherInput -> Output Want to go mess around with something that isnʼt stated in the type signature. Hard cheese. You canʼt.Monday, August 15, 2011

@heidiHarman & @greenEmilyMay @scrive @skrivaPa @scrive_UK My, this sounds insane, why?! Answer: some things are easier The thing thatʼs making functional languages like Haskell popular at the moment is ........ Programming for Multiple CoresMonday, August 15, 2011

@heidiHarman & @greenEmilyMay @scrive @skrivaPa @scrive_UK How many cores does your computer have? How many will it have in 3 years time?Monday, August 15, 2011

@heidiHarman & @greenEmilyMay @scrive @skrivaPa @scrive_UK Immutability Makes Multi- Threaded Code Easier Did you know Twitter uses a functional language for itʼs highly threaded server code?Monday, August 15, 2011

@heidiHarman & @greenEmilyMay @scrive @skrivaPa @scrive_UK TypeSafe saveAddress :: String -> Maybe Error User newtype Email = String saveAddress :: Email -> Maybe Error UserMonday, August 15, 2011

@heidiHarman & @greenEmilyMay @scrive @skrivaPa @scrive_UK Structure Gives Freedom But it makes compilation longer > “Like a logician on your shoulder” - eric > GHC magicMonday, August 15, 2011

@heidiHarman & @greenEmilyMay @scrive @skrivaPa @scrive_UK Itʼs Different > Do you miss that excited feeling you got when you coded as a kid. Become a happy idiot again, learn Haskell.Monday, August 15, 2011

@heidiHarman & @greenEmilyMay @scrive @skrivaPa @scrive_UK Quest to Grok the Monad > If you learn Haskell you will quickly hear the word “monad”. Keep calm.Monday, August 15, 2011

@heidiHarman & @greenEmilyMay @scrive @skrivaPa @scrive_UK I love one thing more than Haskell, Haskell coders. Tip: if someone learns Haskell just to work on your project, theyʼll probably do a good job.Monday, August 15, 2011

Thank youMonday, August 15, 2011

More links about us Lukas Duczko on distributed teams at SSES http://www.vimeo.com/22653093 IDG idg.se/2.1006/1.387765/arets-webbentreprenorer-lukas-duczko-och-gracjan-polakMonday, August 15, 2011

@heidiHarman & @greenEmilyMay @scrive @skrivaPa @scrive_UK CoffetalkMonday, August 15, 2011

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Sswc 2011 scrive loves haskell social swedish webcamp emily green heidi harman

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Sswc 2011 scrive loves haskell social swedish webcamp emily green heidi harman — Presentation Transcript