Heru HartantoMaybe you will find coding skill test that push you ability to swap value between two variables, some developer often using "the third var" technique
// use var instead of let :(
var a = 10;
var b = 14;
var temp = b;
b = a
a = temp
console.log(a, b);
but some developer don't waste his line to create third variable, so this is what they do
let a = 10;
let b = 15;
[a,b] = [b,a]; // array destructuring
console.log(a, b);
even more, they can shorting their line with this rhapsodic technique
let [a,b] = [10,15];
[a,b] = [b,a];
console.log(a, b);
