What's so special about Elm?

This presentation was given at Webbisauna (https://www.webbisauna.fi/) on April 1st, 2016.

The slides themselves don't tell that much, but the talk was recorded, so hopefully I can link the video here sooner or later.

Transcript

1. What’s so special
   about Elm?
   Ossi Hanhinen
   Futurice
   @ohanhi
   

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2. What we used to do
   

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3. jQuery
   Hello Tampere
   Tampere
   event
   listener
   change
   

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4. jQuery
   Hello Tampere
   Tampere
   event
   listener
   change
   Ajax
   change
   

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5. React
   Just the UI
   Redux
   Predictable state
   

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6. Single State
   Model
   View
   map
   

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7. Single Update
   Action Update
   View View
   Model
   

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8. Single Update
   Action Update
   User View
   Model
   View
   

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9. I thought this talk was
   supposed to be about Elm!?
   

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10. React is JavaScript
    

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11. Elm is Elm
    

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12. Functional Programming
    

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13. Is your function pure?
    

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14. Is your function pure?
    

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15. In Elm all functions are pure
    

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16. Currying and Partial Application
    

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17. Demo:
    Currying
    

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18. Functional Reactive Programming
    

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19. Demo:
    Interactive app
    

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20. Language features
    

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21. elm
    Strong static
    types
    That don’t get in the way
    

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22. Elm has guarantees
    

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23. zero
    runtime exceptions
    

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24. Tools
    elm-make - Build Elm and catch errors ahead of time
    elm-package - Package manager that enforces SemVer
    elm-reactor - Hot swapping and time-traveling since 2013
    elm-format - Automatic code beautification
    

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25. “Go and learn Elm. Seriously.
    It is the simplest language I have
    ever tried, and the team has put a
    crazy lot of effort into making the
    developer experience as nice as
    possible.”
    @ohanhi
    

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