alexandrebodin

Comparing two different ways to do dependency injection

Simple factory (straight forward)

 const createStuff = (dependencies) => {
 
  const newStuff = {
    //... using the dependencies
  }
 

alexandrebodin

const {
    GraphQLObjectType,
    GraphQLScalarType,
    TypeInfo,
    visit,
    visitWithTypeInfo,
    findDeprecatedUsages,
    parse,
    validate,
    execute,

alexandrebodin

import knex from 'knex';
import userQueries from './user';

function DB(qb) {
    this.qb = qb;
}


DB.prototype.startTransaction = function(fn) {
    this.knex.transaction(trx => {

alexandrebodin

const proto = {
  timeout: null,
  promise: null,
  racer: null,
  then(fn) {
    this.promise = this.promise.then(result => {
      return Promise.race([this.racer, fn(result)]);
    });

    return this;

alexandrebodin

// no need to load any addon here only register

storiesOf('newAPI', module)
  .add('story', ({ knob , note, state: { counter, setCounter } }, context) => {
    note('myNotes')
    return <div onClick={() => setCounter(n => n + 1)}>{knob.text('name', 'Alex')} - {counter} </div>
  });

alexandrebodin

const definedProto = {
    $$typeof: Symbol.for('jest.asymmetricMatcher'),

    asymmetricMatch(o) {
        return typeof o !== undefined;
    },

    toAsymmetricMatcher() {
        return 'Defined';
    },

alexandrebodin

const stories = storiesOf('Button');


// this will apply the decorator to every story
stories.addDecorator(withKnobs)

// this will call the function with the final storyFn computed in `add`
stories.addMiddleware(fn)
stories.addMiddleware(fn(options))

alexandrebodin

// db/utils/buildSaver.js


const buildEntitySaver = (tableName, entityToDB) => {
   
  function create(entity) {
    return queryBuilder(tableName)
        .insert(entityToDB(entity))
        .returning('id')
        .then(([id]) => id);

alexandrebodin

const mapping = {
    userId: 'user_id',
    comment: 'comment',
    date: 'date',
    id: 'id',
    createdAt: 'created_at',
    updatedAt: 'updated_at',
};

alexandrebodin

var R = require('ramda');

var db = require('./db/queries');

const a = db.filterUser({}, {})
  .addContact('contact')
  .addCompany(['contact', 'company'])
  .then(res => {
    console.log(res.splice(0, 1))
  });