// constructor function

function Person (name) {

​

   // assigning  parameter values to the calling object

    this.name = name;

​

    // defining method

    this.greet = function () {

        return ('Hello' + ' ' + this.name);

    }

}

// method 1

​

function nested(name , age , color){

    this.name = name;

    this.details = { 

        age : age,

        color : color

    }

}

​

let nestedObj = new nested( "Elroi" , 22 , "blue");

 console.log(nestedObj)

​

​

// method 2

class Nested2{

    constructor(name , age , color){

        this.name = name;

        this.details = {

            age : age,

            color : color

        }

    };

​

    displayInfo(){

        console.log(`${this.name} ${this.details.age} ${this.details.color} `)

    } 

}

​

let aaa  = new Nested2("Ean" , 14 , "black");

aaa.displayInfo(); 

function add(c, d) {

  return this.a + this.b + c + d;

}

​

var o = {a: 1, b: 3};

​

// The first parameter is the object to use as

// 'this', subsequent parameters are passed as

// arguments in the function call

add.call(o, 5, 7); // 16

​

// The first parameter is the object to use as

// 'this', the second is an array whose

// members are used as the arguments in the function call

add.apply(o, [10, 20]); // 34