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Unlearn OOP (if you want to learn FP)

Avatar for Uberto Barbini Uberto Barbini
November 29, 2019
Programming
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320

Unlearn OOP (if you want to learn FP)

Keynote at the Italian Kolin Community Conference 2019

Avatar for Uberto Barbini

Uberto Barbini

November 29, 2019
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Transcript

  1. Unlearn Object Oriented Programming (if you want to learn Functional

    Programming) Uberto Barbini ramtop @

  2. When I was a kid I wanted to become a

    Naturalist

  3. I kept reading books about Natural Sciences

  4. I kept reading books about Natural Sciences

  5. I kept reading books about Natural Sciences

  6. Classification was simple...

  7. Then Cladistic arrived... Common ancestors

  8. And birds became dinosaurs!

  9. We are all fish, technically

  10. Scientists are humans...

  11. None

  12. https://pixabay.com/users/endriqstudio-13819715/ https://pixabay.com/users/endriqstudio-13819715/

  13. It’s not easy to Unlearn

  14. None

  15. https://pixabay.com/users/sasint-3639875/ https://pixabay.com/users/sasint-3639875/ Object Oriented vs Functional

  16. None
  17. None
  18. None
  19. None
  20. None
  21. None

  22. Thou Shalt Have No Manager Class

  23. None
  24. None
  25. None
  26. None
  27. None

  28. Credits https://pixabay.com/users/sasint-3639875/ Credits https://pixabay.com/users/sasint-3639875/ The Elephant in the room

  29. None

  30. Object-Oriented Functional

  31. Url Shortener

  32. Url Shortener

  33. Unlearn What seems What seems wrong wrong but it’s but

    it’s right right? ? What seems What seems right right but it’s but it’s wrong wrong? ?
  34. None

  35. Well Defined Types

  36. None

  37. Generics are Type builders

  38. None

  39. Anemic Objects Immutable Data

  40. None

  41. Don’t use Exceptions as result

  42. None

  43. Side effects should be left out

  44. None

  45. Function types instead of Interfaces

  46. None

  47. Which Language or Library should I use?

  48. The ones that spark joy!

  49. Where should I start in an existing Legacy Project?

  50. https://pixabay.com/users/1588877-1588877/ Small changes

  51. None

  52. Unlearn is difficult Functional Programming is made of Arrows Look

    at your code with new eyes (plus we are fish)

  53. Excuses to avoid learning FP: It’s just a bunch of

    funny words I don’t have time What’s the point?

  54. Tell me your Questions! Uberto Barbini @ramtop Blog https://medium.com/@ramtop Book:

    https://tinyurl.com/funkotlinbook