Page 205 - Web Applications (803) Class 12
P. 205
splice() The splice() method adds and/or const fruits = [“pear”, “pinapple”, “guava”, “cherry”,
deletes elements from an array. The “olive”];
original array is replaced. // At position 3, insert 2 elements:
fruits.splice(3, 0, “papaya”, “melon”);
document.write(fruits);
// At position 2, remove 2 items:
fruits.splice(2, 2);
document.write(“<br>”+”After removing elements
“+fruits);
Output:
pear,pinapple,melon,cherry,olive
unshift() Inserts new elements at the beginning const characters = [“Harry”, “Ron”, “Hermione”,
of an array. The original array is “Neville”];
overwritten. characters.unshift(“Hagrid”, “Dudley”);
document.write(characters);
Output:
Hagrid,Dudley,Harry,Ron,Hermione,Neville
indexOf() Returns the location of a value’s first var text = “The cheetah landed in India on 17
appearance in a string. September 2022”;
document.write(text.indexOf(“in”));
Output: 19
match() Finds a match within a string var text = “The rain in INDIA arrives every year
in June”;
document.write(text.match(“ear”));
document.write(“<br>”+text.match(“india”));
Output:
ear
null
Creating a JavaScript Object
You can define and create your own objects in any of the following ways:
Using an object literal.
The following example creates a new JavaScript object with three properties:
const student = {Name : "Uma", age : 15, Address : "Green Park" };
OR
Create an empty JavaScript object, and then add the properties using dot notation as shown:
const student = {};
student.Name = "Uma";
student.age = 15;
student.Address = "Green Park";
Web Scripting—JavaScript 203

