jhonnymoreira

const request = new XMLHttpRequest
const URL = 'https://google.com.br'

// `async` by default, since the last function param is ommited
request.open('GET', URL)
request.send()

// use `load` instead of `ready` so there is no need to do more checks
// related to status code and stuff
request.addEventListener('load', handleResponse)

jhonnymoreira

/**
 * @function
 *
 * Returns the value of a path to be found within an object.
 *
 * @param {Object} [from] The object to search
 * @param {Array} [path] The path to search within object
 *
 * @return {*} The value from path search
 */

jhonnymoreira

Vue Learning

Directives

Special attributes provided by Vue, which applies reactive behavior to the rendered DOM.

Each directive is prefixed with a v-. Here a list of all directives:

Conditional Directives

jhonnymoreira

rows = [
  [9, 0, 5, 0, 0, 8, 0, 0, 2],
  [0, 0, 8, 0, 0, 0, 5, 0, 0],
  [0, 4, 0, 0, 3, 5, 0, 6, 9],
  [4, 0, 3, 7, 0, 2, 0, 0, 0],
  [0, 0, 7, 0, 4, 0, 2, 0, 0],
  [0, 0, 0, 3, 0, 9, 6, 0, 4],
  [2, 8, 0, 4, 9, 0, 0, 1, 0],
  [0, 0, 9, 0, 0, 0, 4, 0, 0],
  [5, 0, 0, 8, 0, 0, 7, 0, 6]

jhonnymoreira

export function add(x: number, y: number): number
export function subtract(x: number, y: number): number

jhonnymoreira

const parseCookies = cookies =>
  cookies.split(/;\s?/)
    .reduce((parsedCookie, cookie) => {
      const [key, value] = cookie.split('=')

      parsedCookie[key] = (value
        ? value
        : '')
    
      return parsedCookie

jhonnymoreira

SQL Learning

SQL means Structured Query Language. It is a language designed to manage data stored in relational databases.

---

Concepts

Relational Databases

jhonnymoreira

FROM ubuntu:18.04

RUN apt-get update && apt-get install -y \
  autoconf \
  bison \
  build-essential \
  curl \
  gcc-6 \
  git \
  libffi-dev \

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const RANKS_WEIGHTS = {
  'Iron 1': 1,
  'Iron 2': 2,
  'Iron 3': 3,
  'Bronze 1': 4,
  'Bronze 2': 5,
  'Bronze 3': 6,
  'Silver 1': 7,
  'Silver 2': 8,
  'Silver 3': 9,

jhonnymoreira

const getMEIDebt = (indexBegin, length) => {
  const NODE_SELECTOR = '.total.updatable.text-center';

  const sum = (x, y) => x + y;
  const normalizeValue = (value) =>
    value.replace('R$', '').replace(',', '.').trim();

  return Array.from(document.querySelectorAll(NODE_SELECTOR))
    .slice(indexBegin, length)
    .map((node) => parseFloat(normalizeValue(node.innerText)))