The functional reactive nature of Marble.js
1 like210 views
The document discusses the functional reactive nature of marble.js, a Node.js framework, emphasizing functional programming concepts such as pure functions, immutability, and reactive programming with streams. It highlights key features of marble.js, including its open-source nature, TypeScript support, and ease of building REST/event-based APIs. The aim is to promote functional reactive programming as a means to create type-safe, easily testable, and readable code.
![@JOZFLAKUS
const length = ([x, ...xs], len = 0) =>
def(x)
? length(xs, len + 1)
: len
Recursion
#5](https://image.slidesharecdn.com/marble-190329094058/85/The-functional-reactive-nature-of-Marble-js-11-320.jpg)
The functional reactive nature of Marble.js
- 1. Follow us @boldarecom@JOZFLAKUS The functional reactive nature of marble.js
- 2. Follow us @boldarecom@JOZFLAKUS The functional reactive nature of marble.js
- 3. Follow us @boldarecom@JOZFLAKUS Józef Flakus Senior JavaScript developer
- 4. λ
- 5. @JOZFLAKUS Ord, Setoid, Semigroup, Foldable, Monoid, Applicative, Contravariant, Functor, Bifunctor, Profunctor, Monad ...
- 6. @JOZFLAKUS Functional programming is not only about Category Theory
- 8. @JOZFLAKUS f(x) = x + 1 ---------------------------------------------------- f(2) = 3 #2 Referential transparency
- 9. @JOZFLAKUS Immutability const x = { foo: ‘bar’ } const y = x X.foo = ‘baz’ y.foo === #3
- 10. @JOZFLAKUS add :: Number -> Number -> Number ----------------------------------- const add = x => y => x + y ----------------------------------- const sum = add(2)(3) First-class functions #4
- 11. @JOZFLAKUS const length = ([x, ...xs], len = 0) => def(x) ? length(xs, len + 1) : len Recursion #5
- 12. @JOZFLAKUS People are finally hearing about functional programming again
- 13. reactive
- 14. @JOZFLAKUS
- 15. @JOZFLAKUS mergeMap, concatMap, switchMap, exhaust, buffer, bufferCount, multicast, pairwise, takeUntil, takeWhile, withLatestFrom, zip, pluck, publishLast, skipWhile …
- 16. @JOZFLAKUS Reactive programming is programming with asynchronous data streams... 1 2 3
- 17. @JOZFLAKUS … and you can do with streams whatever you imagine 1 2 3 map(x => 10 * x) 10 20 30
- 21. @JOZFLAKUS A functional reactive Node.js framework for building server-side applications
- 22. @JOZFLAKUS Based on RxJS library
- 23. @JOZFLAKUS TypeScript users as a main target
- 24. @JOZFLAKUS Since version 2.0 it acts like a framework
- 25. @JOZFLAKUS Build REST/event based APIs with ease
- 27. @JOZFLAKUS #1 RxJS like a hammer for expressing asynchronous flow
- 30. @JOZFLAKUS #4 Effect as a main building block
- 32. @JOZFLAKUS #6 Everything is just a function
- 33. Not only basic HTTP protocol
- 39. Type safety as a main goal
- 45. @JOZFLAKUS Why should I care?
- 47. @JOZFLAKUS 2# Easy to read ;-) and reason about
- 48. @JOZFLAKUS 3# Avoid confusing problems and errors in code
- 49. @JOZFLAKUS 4# Really fun to write!
- 54. @JOZFLAKUS Sometimes, the elegant implementation is just a function. Not a method. Not a class. Just a function. ~ John Carmack >
- 55. @JOZFLAKUS See you on the Mars!
- 56. @boldarecom