rehasantiago

console.log("1");
setTimeout(() => console.log("2"),0);
var promise = new Promise(function(resolve, reject) {
  resolve();
});
promise.then(function(resolve) {
  console.log('3');
})
.then(function(resolve) {
  console.log('4');

rehasantiago

Promise.resolve().then(() => console.log("promise resolved"));
process.nextTick(() => console.log("process.nextTick"));

rehasantiago

let start = Date.now();
setTimeout(() => console.log(Date.now()-start), 1000);
for(let i=0;i<1000;i++);

rehasantiago

setTimeout(() => console.log("1"), 0);
Promise.resolve().then(() => console.log("2"));
console.log("3");

rehasantiago

const fs = require('fs'),
   path = require('path'),
   filePath = path.join(__dirname, 'test.js');

setTimeout(()=> console.log("setTimeout"), 0);
Promise.resolve().then(() => console.log("promise"))

fs.readFile('filePath', function() {
   console.log('readFile');
});

rehasantiago

setImmediate(() => console.log(“setImmediate”));
process.nextTick(() => console.log(“process.nextTick”));
setTimeout(() => console.log(“setTimeout”), 0);

rehasantiago

const func1 = () => {
   setImmediate(() => console.log("setImmediate1"));
   process.nextTick(() => console.log("process.nextTick1"));
   setTimeout(() => console.log("setTimeout1"), 0);
}
const func2 = () => {
   setImmediate(() => console.log("setImmediate2"));
   process.nextTick(() => console.log("process.nextTick2"));
   setTimeout(() => console.log("setTimeout2"), 0);
}

rehasantiago

let arr = [1,2,3,4,5];
arr.forEach(function(word) {
  console.log(word);
 });
// 1
// 2
// 3
// 4
// 5

rehasantiago

Array.prototype.pForEach = function(callback) {
   for (let i = 0; i < this.length; i++) {
    callback(this[i], i, this);
  }
}

rehasantiago

const arr = [1,2,3,4];
const newArr = arr.map(elem => {
    return elem * 2
});
console.log(newArr);
// [2, 4, 6, 8]