Fun quiz!!

quiz-5-1.js

let arr = [1, "hi", {x : 2}, [3, 4]];
delete arr[1];
console.log(arr.length);
// What will console print?

quiz-5-2.js

let arr = [1, "hi", {x : 2}, [3, 4]];
for(let i = 0; i < arr.length; i++) {
  if (arr[i] === "hi") arr.splice(i, 1); 
  else console.log(arr[i]);
}
// What will console print?

quiz-5-3.js

var x = 1;
var z = y + 3;
var y = 2;
console.log(x, y, z);
// What will console print?

quiz-5-4.js

"use strict";
function func() {
  return this;
}
console.log(func());
// What will console print?

quiz-5-5.js

function Foo() {
  this.bar = 10;
}
Foo.prototype.bar = 42;

var foo = new Foo();
console.log("1", foo.bar);

delete foo.bar;           
console.log("2", foo.bar);

quiz-5-6.js

let a = (function(x, y, z){
  delete x, delete y, delete z;
  return x + y + z;
})(1, [2, 3], {x: 4});

console.log(a);