destructuring.js

//array
var [name, lastname] = ["Julián", "Castellanos"];  
console.log(name); // "Julián"  
console.log(lastname); // "Castellanos"

//object
var person = { name: "Carlos", lastname: "Castellanos" };  
var { name, lastname } = person;  
console.log(name); // "Julián"  

//functions
var func = function() {
  return ["Julián", "Castellanos"];
}
var [name, lastname] = func();
console.log(name); //Julián