Object in Javascript

 // Singletons (Type Of Object)

//object.create

//Object literals(This Part 1)

//Part 1

const mysym = Symbol("Key1")  

//Symbol Declaration

const Jsuser ={

    name : "Debadatta",

    age: 19,

    location:"Cuttack",

    email:"debadatta@gmail.com",

    isloggedIn: false,

    lastlogindays:["Mon","Wed","Sat"],

    "Pf account": "y",

    [mysym]:"Symbol1"

}

// console.log(Jsuser.lastlogindays);

// console.log(Jsuser["lastlogindays"]);

// console.log(Jsuser["Pf account"]);

// console.log(Jsuser[mysym])

// console.log(typeof Jsuser[mysym])

// console.log(Jsuser);

// Jsuser.greetings = function(){

//     console.log("Hello Debadatta");

// }

// Jsuser.greetingsTwo = function(){

//     console.log(`Hello Debadatta,${this.email}`);

// }

// console.log(Jsuser.greetings());

// console.log(Jsuser.greetingsTwo());

//Object Freze

//Object Override

//Part 2(Singleton)

const tinderuser = {}

tinderuser.id = "123abc"

tinderuser.name = "Aditya"

tinderuser.isloggedIn = false

// console.log(tinderuser);

const regular = {

    email:"abc@gmail.com",

    fullname : {

        userfullname:{

            first:"Aditya",

            Last:"Pradhan"

        }

    }

}

// console.log(regular.fullname.userfullname.Last);

const obj1 = {1:"A",2:"P"}

const obj2 = {3:"D",4:"P"}

// const obj3 = Object.assign({},obj1,obj2)

// console.log(obj3);

// const obj3 = {...obj1,...obj2}

// console.log(obj3);

const users =[

    {

        id:1,

        name:"Aditya"

    },

    {

        id:2,

        name:"Deba"

    },

    {

        id:3,

        name:"Jyoti"

    },

]

// console.log(Object.keys(tinderuser));

// console.log(Object.values(tinderuser));

// console.log(Object.entries(tinderuser));

// console.log(tinderuser.hasOwnProperty('isloggedIn'));

// Json API

const course ={

    coursename : "Js in hindi",

    price:"999",

    cousreinstructor:"Hitesh"

}

const {cousreinstructor : instructor} = course

console.log(instructor);

// json structure

{

    "name":"hitesh",

    "course":"Js"

    "price":"free"

}

//Json Api in array

[

    {},

    {},

    {}

]