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Unlearn OOP (if you want to learn FP)
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Uberto Barbini
November 29, 2019
Programming
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Unlearn OOP (if you want to learn FP)
Keynote at the Italian Kolin Community Conference 2019
Uberto Barbini
November 29, 2019
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Transcript
Unlearn Object Oriented Programming (if you want to learn Functional
Programming) Uberto Barbini ramtop @
When I was a kid I wanted to become a
Naturalist
I kept reading books about Natural Sciences
I kept reading books about Natural Sciences
I kept reading books about Natural Sciences
Classification was simple...
Then Cladistic arrived... Common ancestors
And birds became dinosaurs!
We are all fish, technically
Scientists are humans...
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https://pixabay.com/users/endriqstudio-13819715/ https://pixabay.com/users/endriqstudio-13819715/
It’s not easy to Unlearn
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https://pixabay.com/users/sasint-3639875/ https://pixabay.com/users/sasint-3639875/ Object Oriented vs Functional
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Thou Shalt Have No Manager Class
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Credits https://pixabay.com/users/sasint-3639875/ Credits https://pixabay.com/users/sasint-3639875/ The Elephant in the room
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Object-Oriented Functional
Url Shortener
Url Shortener
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? ?
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Well Defined Types
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Generics are Type builders
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Anemic Objects Immutable Data
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Don’t use Exceptions as result
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Side effects should be left out
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Function types instead of Interfaces
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Which Language or Library should I use?
The ones that spark joy!
Where should I start in an existing Legacy Project?
https://pixabay.com/users/1588877-1588877/ Small changes
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Unlearn is difficult Functional Programming is made of Arrows Look
at your code with new eyes (plus we are fish)
Excuses to avoid learning FP: It’s just a bunch of
funny words I don’t have time What’s the point?
Tell me your Questions! Uberto Barbini @ramtop Blog https://medium.com/@ramtop Book:
https://tinyurl.com/funkotlinbook