Day 10 || Array in JavaScript || Object in JavaScript

  JavaScript Topics 

Day 10 :

•     Array

•     Object

Array:

var sweetBox = ["Mango Crunch", "Oreo Crunch", "Kesar Crunch", "Orange Apricot Crunch"];

sweetBox.push("Rose Kaju Crunch")

sweetBox.unshift("Cherries Crunch")

sweetBox.pop()

sweetBox.shift()

array.splice(index, elements to be removed, elements to be added)

sweetBox.splice(0,1,"Lemon Crunch", "Kiwi Crunch")

console.log(sweetBox)

var sweetBox = ["Mango Crunch", "Oreo Crunch", "Kesar Crunch", "Orange Apricot Crunch",123,143,133, true, false];

Object:

var student = {

    name:"Hema",

    age:21,

    isStudent:true,

    studentAge:23

}

student.course = "FSWD"

student.age = 22

delete student.isStudent;

student["course"] = "FSWD";

student["age"] = 23;

delete student["isStudent"];

var studentAge = "age";

console.log(student.studentAge)

console.log(student[studentAge])

Tasks:

Array Task: Shopping List

Create a JavaScript program that simulates a simple shopping list. Use an array to represent the items in the list.

Your program should perform :

Create an Array:

Create an array called shoppingList with some initial items.

Display Shopping List:

Write a function that takes the shopping list array as a parameter and displays the list of items.

Add Item:

Write a function that takes the shopping list array and a new item as parameters. Add the new item to the shopping list.

Remove Item:

Write a function that takes the shopping list array and an item to remove as parameters. Remove the specified item from the shopping list.

Object Task: Student Information

Create a JavaScript program that manages information about students. Each student should have the following properties:

Name

Age

Grade Level

Subjects (an array of subjects the student is studying)

Your program should perform :

Create an Object:

Create an object called student with properties for a sample student.

Display Student Information:

Write a function that takes a student object as a parameter and displays its information (name, age, grade level, and subjects).

Update Property:

Write a function that takes a student object, a property name, and a new value as parameters. Update the specified property of the student with the new value.

Add Subject:

Write a function that takes a student object and a new subject as parameters. Add the new subject to the student's list of subjects.

Interview Questions:

1. What is the difference between splice() and slice()?

2. How do you add a new property to an object?