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ReasonML - Front in Vale 2018
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Ana Luiza Portello
August 11, 2018
Programming
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ReasonML - Front in Vale 2018
Ana Luiza Portello
August 11, 2018
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Transcript
ANA LUIZA BASTOS github.com/anabastos @naluhh @anapbastos Software Developer na Quanto
e cientista da computação na PUC-SP anabastos.me
JSLADIES fb.com/jsladiesbr twitter.com/jsladiessp meetup.com/JsLadies-BR/ LAMBDA.IO t.me/lambdastudygroup github.com/lambda-study-group/ meetup.com/Lambda-I-O-Sampa- Meetup/
None
JAVASCRIPT
Javascript foi pensado em 10 dias pelo Brendan Eich em
1995 para fazer sites interativos
None
None
None
None
Linguagens que compilam JS são os novos frameworks JS.
• Mudar de um ecossistema para outro. • Necessidade de
reescrever o projeto do 0. • Problemas com Interop. • Maioria das tools e frameworks são para o JS.
O que é ReasonML?
Mantida e usada pelo Facebook Se tornou open source em
2016 Criado pelo Jordan Walke (criador do React) Sintaxe em cima do OCaml e inspirada em JavaScript
Mesmo ecossistema e workflow
“it's a new syntax and toolchain for Ocaml.”
O que é OCaml?
Linguagem da familia ML(SML, OCaml, Haskell) Conhecido pela sua mantenabilidade
Décadas de pesquisa em sistemas de tipos e engenharia de compiladores tops
O que é ser uma nova syntax pra OCaml?
WORKFLOW OCAML
Ocaml AST OCAMLOPT Syntax OCaml(.ml) OCAMLC NativeCode ByteCode BUCKLESCRIPT Javascript
None
Ocaml AST Syntax Reason(.re) BUCKLESCRIPT OCAMLOPT Syntax OCaml(.ml) OCAMLC Javascript
NativeCode ByteCode .ml == .re
JAVASCRIPT FRIENDLY
let msg = ”hello world!”; Js.log(msg); // hello world! Hello
World
let add = (a, b) => a + b; Função
math.re
import { add } from “math.re”; add(1, 2) // 3
index.js
ESTRUTURAS DE DADOS IMUTÁVEIS & OTIMIZADAS const
É uma LINGUAGEM ESTATICAMENTE tipada.
String Bool List Float Int Record Tuple Option Unit
Inferencia de Tipos
let add = (a, b) => a + b; Inferencia
de Tipos val add: Int => Int => Int
/* REASON */ let add = (a, b) => a
+ b; /* JS + FLOW / TYPESCRIPT */ const add = (a: number, b: number): number => a + b;
Declaração de Tipos
None
type item = { title: string, completed: boolean, }; type
state = { items: list(item) };
type statusType = ToDo | Doing | Done
Option
null NaN -Infinity “undefined is not a function”
type option('a) = None | Some('a);
Currying & Partial Application (Proposal)
let add = (x, y) => x + y; let
inc = add(1); inc(10); /* 11 */
let multiply = (x, y) => x * y; let
multiplyBy10 = multiply(10); multiplyBy10(10); /* 100 */
Pipeline Operator (Proposal)
let number = 50 number |> inc |> multiplyBy10 /*
510 */ multiplyBy10(inc(50))
Pattern Matching (Proposal)
type color_type = White | Black let colorHex = (color)
=> switch(color) { | White => “#FFFFFF” | Black => “#000000” _ => “#999999” };
Recursão (ES6)
None
ReasonML x ReasonReact
REACT BINDINGS
None
JSX
AMBIENTE
npm install -g bs-platform
create-react-app NOME X bsb -init NOME -theme react
yarn start
None
None
NOME/ README.md node_modules/ public/ favicon.ico index.html src/ index.re index.css app.re
app.css Logo.svg package.json bsconfig.json { "name": <app-name>, "sources": [ "src" ], "bs-dependencies": [ "reason-react", "bs-jest", ], "reason": { "react-jsx": 2 }, "bsc-flags": [ "-bs-super-errors" ], "refmt": 3 } bsconfig.json = package.json + .babelrc + .eslintrc
"scripts": { "build": "bsb -make-world -clean-world", "watch": "bsb -make-world -clean-world
-w" }
Eu vou ter que reescrever tudo?
Adicionar bsconfig.json Buildar com o bucklescript
Já tem as features da ES2030 sem migrar de ecossistema
para outro
Documentação Ocaml caml.inria.fr/pub/docs/manual-ocaml/ Documentação BuckleScript bucklescript.github.io/bucklescript/Manual.html Documentação Reason reasonml.github.io/docs/en/quickstart-javascript.html Documentação
ReasonReact reasonml.github.io/reason-react/docs/en/installation.html Reason Package Index redex.github.io/ Exploring Reason reasonmlhub.com/exploring-reasonml
Comunidade Discord discord.gg/reasonml Twitter twitter.com/reasonml “StackOverFlow” reasonml.chat
OBRIGADA :) speakerdeck.com/anabastos anabastos.me github.com/anabastos @naluhh @anapbastos