08-JavaScriptObjects.js

//JavaScript Objects 
const car = {
    name: "BMW",
    model: 500,
    weight: "850kg",
    color: "white",
    start: function () {
      console.log("Car has started");
    },
    drive: function () {
      console.log("Car is driving.");
    },
    brack: function () {
      console.log("The car is bracket.");
    },
    stop: function () {
      console.log("The car is stop.");
    },
    fullName: function () {
      return this.name + " " + this.model;
    },
};

const parson = {
    fastName: "Sahin",
    lastName: "Enam",
    age: 17,
    home: "Bhola",
    fullName: function () {
      return this.fastName + " " + this.lastName;
    },
};

console.log(car.weight);
console.log(car.color);
console.log(car['model']);
car.start();
car.brack();
car.stop();
console.log(car.fullName());

console.log(parson.fullName());



// JavaScript Objects

/*
 * Object Literal
 * If you create a JavaScript Object using literals then its not a Singleton
 * Constractor can create Singleton
 */

// Explain Symbol
const newSymb = Symbol('Key1');

// Object Literal
const mobileModel = {
  // key: value
  brand: 'Samsung',
  model: 's24 Ultra',
  processor: 'Sanpdragon Gen 3',
  camera: ['200MP', '12MP', '12MP'],
  hasZoomCamera: true,
  // To Explain Bracket Notation
  'selfie camera MP': 12,
  // Let me use symbol as keys in Object
  [newSymb]: 'MyKey1',
  brandModel: function () {
    return `Mobile Brand is ${this.brand} and model is ${this.model}`;
  },
  battray: {
    mah: 5000,
  },
};

/*
 * Object Access Process
 * You can do this two Ways
 * dot Notation & Bracket Notation
 */

// Dot Notation
console.log(mobileModel.brand);

// Bracket Notation
console.log(mobileModel['precessor']);
console.log(mobileModel['selfie camera']);
console.log(mobileModel[newSymb]); // No other option then bracket notation

// Change Oblect values
mobileModel.model = 's25 Ultra';

// You can freez an Object
Object.freeze(mobileModel);
mobileModel.model = 's26 Ultra';

// Sometimes you might need to collect all keys as arrays
console.log(Object.keys(mobileModel));
// If need values
console.log(Object.values(mobileModel));
//If need to search a key is available or not
console.log(mobileModel.hasOwnProperty('camera'));

console.log(mobileModel.brandModel());

const obj1 = {
  a: 1,
  b: 2,
  c: 3,
};

const obj2 = {
  p: 1,
  q: 2,
  r: 3,
};

const obj3 = {
  x: 1,
  y: 2,
  z: 3,
};

// const obj3 = { obj1, obj2 };
// const objFinal = Object.assign(target, source);
// const objFinal = Object.assign({}, obj1, obj2, obj3);

const objFinal = { ...obj1, ...obj2, ...obj3 };
console.log(objFinal);

console.log(mobileModel.battray.mah);

/*
 * Object Constractor
 * Singleton
 */
function Person(first, last) {
  (this.firstName = first), (this.lastName = last);
}

const person1 = new Person('Ali', 'Hossain');
person1.age = 18;
const person2 = new Person('Shovo', 'Ahmed');
person2.greet = function () {
  return 'Hello';
};

console.log(person1);
console.log(person2.greet());