Introduction to functional programming with Javascript

Transcript

1. Introduction to Functional programming (with javascript)
2. It is not rocket science
5. It is (probably) not a different paradigm of programming
6. It’s not new
7. Functional programming is a way of modelling a system in terms of processes. Verbs not nouns.
8. input λ output data algorithm data
9. http request server http response db
10. react html http response mouse click keypress timer
11. f(data) => View
12. Functional programming suits the web
13. Erm. About all that terminology.
14. Pure function
15. Not a pure function
16. Not a pure function
17. Higher order function
18. map [a, b, c] [b, c, d] map [1] [11] map
19. reduce [1, 2, 3] 6 reduce [1, 2, 3, 4] reduce [2, 4]
20. [1, 2, 3, 4] reduce [1, 2, 2, 3, 3, 3, 4, 4, 4, 4]
21. map => reduce [{name: bob, age: 42}, {name: jenny, age: 40}] [42, 40] map [82] reduce
24. To the code!
25. Fin