it’s not because you are not in object-land that you can drop minimally good practices

1. objects can still teach us
one or two things.
Phil Calçado - SoundCloud
@pcalcado
http://philcalcado.com
Sunday, January 29, 12

2. http://bit.ly/work-at-soundcloud
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3. (I will not talk about monads,
scalaz, bifunctors or burritos)
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4. with
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5. we thought we would...
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6. more like...
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7. and then...
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8. Sunday, January 29, 12

9. with
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10. we think we can...
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11. but what I see in the wild...
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12. but what I see in the wild...
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13. coupling
no single responsibility
“cyclomatic complexity”
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14. coupling
no single responsibility
“cyclomatic complexity”
it’s just (bad) procedural
code, really
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15. that code was replaced by something like this
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16. coupling
no single responsibility
“cyclomatic complexity”
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17. all old problems.
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18. all old problems.
?
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19. coupling
no single responsibility
“cyclomatic complexity”
composition!
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20. Sunday, January 29, 12

21. building blocks you need:
higher-order functions
combinators
partial application
function composition
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22. (I kinda lied)
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23. all old problems.
?
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24. much older than we thought...
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25. tl;dr
=> it’s not because you are not in object-
land that you can drop minimally good
practices
=> just using the basic blocks of functional
programming gives you a lot
=> after a while using these you see
patterns emerging. and you understand why
monads and friends exist. promise :)
Sunday, January 29, 12

26. Functional Programming with Bananas,
Lenses, Envelopes and Barbed Wire:
http://bit.ly/FP-with-Bananas-Lenses-
Envelopes-and-Barbed-Wire
Basic Category Theory for Computer
Scientists: http://amzn.to/xxeVUC
Theorems for free!:
http://bit.ly/Theorems-for-free
The Essence of Functional Programming:
http://bit.ly/the-essence-of-FP
Sunday, January 29, 12