AliN11

  #1: object
  #2: 57
  #3: 10.5
  #4: undefined
  #5: John
  #6: 542
  #7: 113
  #8: 3
  #9: 64
 #10: 2

AliN11

try {
    var x = y / 10;
} catch(error) {
    console.log(error);
}

// Console: ReferenceError: y is not defined

AliN11

<?php

class Room
{
    private $color = 'white';
    private $size  = 'xl';

    public function setColor(string $color): void
    {
        $this->color = $color;

AliN11

<?php

class Sun
{
    // ...

    private function __sleep() {}
    private function __wakeup() {}
};

AliN11

window.name = 'شایان شایان پرور';

function greeting() {
    console.log('سلام آقای ' + window.name);
}

greeting(); // سلام آقای شایان شایان پرور

// ...

AliN11

let name1 = "John";
let name2 = name1;

console.log(name1); // John
console.log(name2); // John

name1 = "Paolo";

console.log(name1); // Paolo
console.log(name2); // John

AliN11

let house1 = {
    color: 'green'
}

let house2 = house1;

console.log(house1.color); // green
console.log(house2.color); // green

house1.color = "yellow"

AliN11

enum Colors {Red, Green, Blue};

console.log(typeof Colors); // object
console.log(Colors);

/*
{
    '0': 'Red',
    '1': 'Green',
    '2': 'Blue',

AliN11

// These two lines:
console.log(y); // undefined
y = "Street";

// are interpreted as:
var y;
console.log(y); // undefined
y = "Street";

AliN11

let person = {
    name: 'Bastian',
    lastname: 'Schweinsteiger'
};

person = JSON.stringify(person);

localStorage.setItem('user', person);