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Commit 56c9afd

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Working on Objects
1 parent 9192fa7 commit 56c9afd

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4 files changed

+166
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4 files changed

+166
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lines changed

‎Objects/JSConstructorFunction.js‎

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// In JavaScript, a constructor function is used to create objects.
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function Person (){
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this.name= 'Chittaranjan',
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this.age= 23
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}
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const person = new Person()
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console.log(person.name, person.age)
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// constructor function
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function Man(){
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this.name = 'Chitta',
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this.age = 34,
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this.greet = function(){
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console.log('Hello '+this.name)
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}
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}
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man1 = new Man()
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man2 = new Man()
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man2.name = 'Ashok' // Changing the value for an object
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man1.greet()
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man2.greet()
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// JavaScript Constructor Function Parameters
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function Person1(name, age, gender){
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this.name = name,
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this.age = age,
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this.gender = gender,
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this.intro = function(){
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console.log(this.name+' is '+this.age+' years old - '+this.gender)
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}
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}
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p1 = new Person1('Chitta', 34, 'M')
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p2 = new Person1('Ambuja', 29, 'F')
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p1.intro()
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p2.intro()
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/* Create Objects: Constructor Function Vs Object Literal
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Object Literal is generally used to create a single object.
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The constructor function is useful if you want to create multiple objects.
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*/
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// using object literal
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let person2 = {
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name: 'Sam'
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}
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function Person2 () {
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this.name = 'Sam'
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}
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let per1 = new Person2();
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let per2 = new Person2();
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console.log(per1.name);
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console.log(per2.name);
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/*JavaScript Object Prototype
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You can also add properties and methods to a constructor function using a prototype. */
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// constructor function
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function Person3 () {
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this.name = 'John',
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this.age = 23
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}
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// creating objects
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let per31 = new Person3();
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let per32 = new Person3();
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// adding new property to constructor function
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Person3.prototype.gender = 'Male';
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console.log(per31.gender); // Male
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console.log(per32.gender); // Male
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//JavaScript Built-in Constructors
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let a = new Object(); // A new Object object
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let b = new String(); // A new String object
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let c = new Number(); // A new Number object
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let d = new Boolean(); // A new Boolean object
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‎Objects/JSMethods.js‎

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// creating an object
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let stud = { };
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// adding a property
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stud.name = 'John';
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// adding a method
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stud.greet = function() {
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console.log('hello');
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}
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// accessing a method
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stud.greet(); // hello
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// Use of this keyword and methods inside a object
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const student = {
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name: 'Ambuja',
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rollNo: 234556,
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totalMarks: 41,
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studInfo: function(){
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console.log('name of the student - '+this.name)
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console.log('Rool No of the student - '+this.rollNo)
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},
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result: function(){
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if(this.totalMarks>=40)
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console.log('PASSED')
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else console.log('FAILED')
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}
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}
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student.studInfo()
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student.result()
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// User of the this.variable and local varible
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const person = {
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name: 'Chittaranjan',
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age: 30,
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greet: function() {
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let surname = 'Swain';
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console.log('The name is' + ' ' + this.name + ' ' + surname); }
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};
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person.greet();

‎Objects/JSObjects.js‎

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const person = {
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name: 'chitta',
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age: 20
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}
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console.log(person)
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console.log(typeof(person))
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console.log(person.name) // Dot notaion
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console.log(person['age']) // bracket notation
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person.age = 30
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console.log(person.age)

‎Objects/ObjectFunctions.js‎

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const person = {
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name: 'chitta',
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age: 20,
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greet: function() {
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console.log('Hello')
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}
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}
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person.greet()
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const student = {
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name: 'Ambuja',
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rollNo: 234556,
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totalMarks: 41,
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studInfo: function(){
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console.log('name of the student - '+student.name)
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console.log('Rool No of the student - '+student.rollNo)
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},
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result: function(){
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if(student.totalMarks>=40)
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console.log('PASSED')
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else console.log('FAILED')
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}
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}
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student.studInfo()
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student.result()

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