alenvlahovljak

//* Type Inference *//
// The system can guess that array will contain only numbers
// based on the array's initialization.

const arr1 = [14, 21, 28];

arr1.push(15);
arr1.push("Hello World!");

alenvlahovljak

const arr1 = [1, 2, 3];
const arr2 = [];


if (arr1) {
    console.log("You should see this message!");
}

if (arr1.length) {
    console.log("Array is not empty!");

alenvlahovljak

var students = [];


//** if(students) **//
// 1. students 
// 2. Boolean(students)
if (true) console.log("You can see this message!");

//** if(students == true) **//
// 1. "" == true

alenvlahovljak

var students = [];


if (students) {
    console.log("You can see this message!");
}

if (students == true) {
    console.log("You can't see this message!");
}

alenvlahovljak

var arr1 = [];
var arr2 = [];


//1. arr1 != arr2
//2. (!(arr1 == arr2))
//3. (!(false))
if (true) console.log("It's true again!");

alenvlahovljak

var arr1 = [];
var arr2 = [];


//1. arr1 == !arr2
//2. [] == false 
//3. "" == false
//4. "" == 0
//5. 0 == 0 
//6. 0 === 0 

alenvlahovljak

var arr1 = [];
var arr2 = [];


if (arr1 == !arr2) {
    console.log("Yes, it's true!");
}

if (arr1 != arr2) {
    console.log("It's true again!");

alenvlahovljak

var str1 = "Hello";
var str2 = new String("Hello");

str1 == str2   // true
str1 === str2   // false - coercion was not allowed this time

alenvlahovljak

// 1.   compare number == array
// 2.   42 == ToPrimitive(array)
// 3.   42 == "42"
// 4.   42 === 42

if (true) console.log("Now you know the magic!");

alenvlahovljak

var number = 42;
var array = [42];

if (number == array) console.log("It works. Is this a magic?");