emerson-pereira

	Pode ser redeclarada	Pode ser reatribuida	É escopada em bloco
var	✅	✅	❌
let	❌	✅	✅
const	❌	❌	✅

emerson-pereira

const http = require("http");

const PORT = 8080;
const server = http.createServer((req, res) => {
  if (req.url === "/") {
    res.end("Welcome home!");
  }
  if (req.url === "/user") {
    if (req.method === "GET") {
      res.end("This is the user page");

emerson-pereira

# Kills port
function kill-port() {
  echo 'Killing port ' $1
  kill $(lsof -t -i :$1)
  echo 'Killed port ' $1
}

emerson-pereira

function aboveAverage(numbers = []) {
   let total = numbers.reduce((acc, curr) => acc + curr, 0);
   let average = total / numbers.length;
   let aboveAverage = numbers.filter(number => number > average);
   return aboveAverage.length;
}

emerson-pereira

alias list='f() {
	cd /Users/emerson/Projects/$1;
	printf "Please select folder:\n"
	select d in */; do test -n "$d" && break; echo ">>> Invalid Selection"; done
	cd "$d"
};f'

emerson-pereira

const express = require('express');
const session = require('express-session');  
const passport = require('passport'); 
const cookieParser = require('cookie-parser');
const fs = require('fs');
const https = require('https');
const cfenv = require('cfenv');
const axios = require('axios');

const settings = require('./settings.js');

emerson-pereira

Template String

var arr = ['Foo', 'Bar']

console.log(`Olá
    ${arr[0]}
    e
    ${arr[1]}`)

emerson-pereira

// ==UserScript==
// @name         Wikipedia
// @namespace    http://tampermonkey.net/
// @version      0.1
// @description  try to take over the world!
// @author       You
// @match        https://en.wikipedia.org/*
// @match        https://pt.wikipedia.org/*
// @grant        none
// @import       https://cdnjs.cloudflare.com/ajax/libs/jquery/3.3.1/jquery.min.js

emerson-pereira

[
    { "id": 11, "name": "Mr. Foo" },
    { "id": 12, "name": "Narco Bar" },
    { "id": 13, "name": "Bombasto" },
    { "id": 14, "name": "Celeritas" },
    { "id": 15, "name": "Magneta" },
    { "id": 16, "name": "RubberMan" },
    { "id": 17, "name": "Dynama" },
    { "id": 18, "name": "Dr IQ" },
    { "id": 19, "name": "Magma" },

emerson-pereira

var ids = [ ... ];

ids.forEach(function(id, i){
    callApi(id);
});

function callApi(videoId) {
    $.ajax({
        type: 'GET',