LautaroJayat

//  First we require the http native module and we store it in a variable
const http = require('http');

//  Then we set a port based on the following condition: if the enviroment variable
//  'PORT' exists, then we use it. Else, we use 3000.
const PORT = process.env.PORT || 3000;

//  Then we call the createServer() function to initialize our server
//  And we store it in a cool variable. 
const server = http.createServer(

LautaroJayat

// Now we put assign the names for the request and response objects that
// are used in the createServer(function);
const server = http.createServer((req, res) => {
    // Lets see what a request object looks like.
    console.log(req);
}).listen(PORT);

LautaroJayat

const server = http.createServer((req, res) => {
    // Let store our URL and Method in a variable
    const URL = req.url;
    // Lets make something using conditionals
    if (req.url === '/') {
        // Note that we are using res.write() method and then using res.end().
        // This is mandatory if you expect your server to work fine.
        res.write('Yea! Its Working! Esoteric Knowledge!', 'utf-8', () => {
            console.log('console.log from the callback function!')
        });

LautaroJayat

const http = require('http');
//  Require the File System Module
const fs = require('fs');

const PORT = process.env.PORT || 3000;


const server = http.createServer((req, res) => {

    const URL = req.url;

LautaroJayat

const server = http.createServer((req, res) => {

    const URL = req.url;
    if (req.url === '/') {
        
        // We try to read the method in a Synchronous way
        // Note that we dont assign the output to a variable,
        // instead, we store the output in the second parameter of the
        // callback function.
        fs.readFile('./views/index.html', (err, data) => {

LautaroJayat

const server = http.createServer((req, res) => {

    const URL = req.url;

    if (req.url === '/') {

        // We try to read the method in a Synchronous way
        // Note that we dont assign the output to a variable,
        // instead, we store the output in the second parameter of the
        // callback function.

LautaroJayat

const http = require('http');

//  This is what we are importing as a function to http.createServer()
const app = require('./app');

const PORT = process.env.PORT || 3000;

var server = http.createServer(app).listen(PORT);

server.on('listening', () => {

LautaroJayat

const ctrl = require('./controllers/controllers');

const app = (req, res) => {

    const URL = req.url;
    
    // What we say when the request method isnt GET
    if (req.method !== 'GET') {
        ctrl.forInvalidMethod(req, res);
    }

LautaroJayat

const http = require('http');
const fs = require('fs');
const ctrl = {};


ctrl.forInvalidMethod = function (req, res) {
    res.statusCode = 405;
    res.setHeader('Allow', 'GET');
    return res.end();
}

LautaroJayat

let array = [1, 2, 3, '4', undefined, 'a', [], null];

function onlyNumbers(arr) {
    //  We create an array to output
    let output = [];
    //  We use forEach() to check if the type of every element is the string 'number'
    //  because we know that it outputs a lowercase string with the type.
    //  If true, we push the element to the output.
    arr.forEach(e => { if (typeof (e) === 'number') { output.push(e) } })
    return output