JSFiddle - React, Tailwind, and code Playground

by rlemon

JavaScript

var arr = {
    0 : "hello",
    8 : "world",
    14: "!"
    };

var count = 0;
for (var k in arr) {
   ++count;
}

document.write(arr[0] + " " + arr[8] + arr[14] + " with a length of " + count );