This article is going to explain how to create array objects in JavaScript using JSON (JavaScript Object Notation).
JSON provides and different way through which we can create array objects in JavaScript.
Syntax of creating Array objects in JavaScript with JSON:
If the JSON data describes an array and each element of that array is an object.
<script type="text/javascript">
var variableName = {
// JSON Script data
……………………………
…………………………..
}
</script>
Here I’m creating an example on how to create Array objects in JavaScript using with JavaScript Object Notification (JSON).
// Declaration of Array object using JSON structure and data types
var StudentDetails = {
//Array to collect record of Student.
// Information of MCA students
"MCAStudent": [{
"StudentName": "Kumar Vishu",
"Roll_No":100,
"Stream": "Computer Science",
"Course": "MCA"
}],
// Information of B.Tech Students
"BtechStudent":[
{
"StudentName": "Tarun Bindra",
"Roll_No":101,
"Stream": "Science",
"Course": "B.Tech"
}],
// Information of MBA Student
"MbaStudent":[
{
"StudentName": "Arun Singh",
"Roll_No":103,
"Stream": "Management Studies",
"Course": "MBA"
}],
// Information of BE student
"BeStudent":[
{
"StudentName": "Rohit Tyagi",
"Roll_No":104,
"Stream": "Engineering",
"Course": "BE"
}],
// Information of B.A. student
"BaStudent":
[{
"StudentName": "Rohan Bopanna",
"Roll_No":105,
"Stream": "Art",
"Course": "B.A."
}]
}// End of creation of Array object in JavaScript using with JSON
Let’s see a complete demonstration on creating Array objects in Java Script. Write the following code:
<!DOCTYPE html>
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=windows-1252">
<title></title>
</head>
<body>
<h1 style="color: purple;">Example of Creating Array Object in JavaScript using JSON</h1> </br>
<script type="text/javascript">
// Declaration of Array object using JSON structure and data types
var StudentDetails = {
//Array to collect record of Student.
// Information of MCA students
"MCAStudent": [{
"StudentName": "Kumar Vishu",
"Roll_No":100,
"Stream": "Computer Science",
"Course": "MCA"
}],
// Information of B.Tech Students
"BtechStudent":[
{
"StudentName": "Tarun Bindra",
"Roll_No":101,
"Stream": "Science",
"Course": "B.Tech"
}],
// Information of MBA Student
"MbaStudent":[
{
"StudentName": "Arun Singh",
"Roll_No":103,
"Stream": "Management Studies",
"Course": "MBA"
}],
// Information of BE student
"BeStudent":[
{
"StudentName": "Rohit Tyagi",
"Roll_No":104,
"Stream": "Engineering",
"Course": "BE"
}],
// Information of B.A. student
"BaStudent":
[{
"StudentName": "Rohan Bopanna",
"Roll_No":105,
"Stream": "Art",
"Course": "B.A."
}]
}// End of creation of Array object in JavaScript using with JSON
//Print Array items or elements on web page.
//Declare variable to count array element
var i =0;
document.writeln("<table border='2' width='1000'><tr>");
// Print MCA Student details on web page
for(i=0;i<StudentDetails.MCAStudent.length; i++)
{
document.writeln("<td><table><tr>");
document.writeln("<td>")
document.writeln("<table><tr>"+"<td><b>Student Name:</b></td>"+"<td>"+StudentDetails.MCAStudent[i].StudentName+"<td></tr>");
document.writeln("<tr>"+"<td><b>Roll_No:</b></td>"+"<td>"+StudentDetails.MCAStudent[i].Roll_No+"<td></tr>");
document.writeln("<tr>"+"<td><b>Stream:</b></td>"+"<td>"+StudentDetails.MCAStudent[i].Stream+"<td></tr>");
document.writeln("<tr>"+"<td><b>Course:</b></td>"+"<td>"+StudentDetails.MCAStudent[i].Course+"<td></tr>");
document.writeln("</td>");
document.writeln("</tr></table></td>");
}
// Print B.Tech Student details
for(i=0;i<StudentDetails.BtechStudent.length;i++)
{
document.writeln("<td><table ><tr>");
document.writeln("<td>")
document.writeln("<table><tr>"+"<td><b>Student Name:</b></td>"+"<td>"+StudentDetails.BtechStudent[i].StudentName+"<td></tr>");
document.writeln("<tr>"+"<td><b>Roll_No:</b></td>"+"<td>"+StudentDetails.BtechStudent[i].Roll_No+"<td></tr>");
document.writeln("<tr>"+"<td><b>Stream:</b></td>"+"<td>"+StudentDetails.BtechStudent[i].Stream+"<td></tr>");
document.writeln("<tr>"+"<td><b>Course:</b></td>"+"<td>"+StudentDetails.BtechStudent[i].Course+"<td></tr>");
document.writeln("</td>");
document.writeln("</tr></table></td>");
}
// Print MBA Student Details
for(i=0;i<StudentDetails.MbaStudent.lenght;i++)
{
document.writeln("<td><table><tr>");
document.writeln("<td>")
document.writeln("<table><tr>"+"<td><b>Student Name:</b></td>"+"<td>"+StudentDetails.MbaStudent[i].StudentName+"<td></tr>");
document.writeln("<tr>"+"<td><b>Roll_No:</b></td>"+"<td>"+StudentDetails.MbaStudent[i].Roll_No+"<td></tr>");
document.writeln("<tr>"+"<td><b>Stream:</b></td>"+"<td>"+StudentDetails.MbaStudent[i].Stream+"<td></tr>");
document.writeln("<tr>"+"<td><b>Course:</b></td>"+"<td>"+StudentDetails.MbaStudent[i].Course+"<td></tr>");
document.writeln("</td>");
document.writeln("</tr></table></td>");
}
// Print BE Student Details
for(i=0;i<StudentDetails.BeStudent.length;i++)
{
document.writeln("<td><table><tr>");
document.writeln("<td>")
document.writeln("<table><tr>"+"<td><b>Student Name:</b></td>"+"<td>"+StudentDetails.BeStudent[i].StudentName+"<td></tr>");
document.writeln("<tr>"+"<td><b>Roll_No:</b></td>"+"<td>"+StudentDetails.BeStudent[i].Roll_No+"<td></tr>");
document.writeln("<tr>"+"<td><b>Stream:</b></td>"+"<td>"+StudentDetails.BeStudent[i].Stream+"<td></tr>");
document.writeln("<tr>"+"<td><b>Course:</b></td>"+"<td>"+StudentDetails.BeStudent[i].Course+"<td></tr>");
document.writeln("</td>");
document.writeln("</tr></table></td>");
}
// Print BA student Details
for(i=0;i<StudentDetails.BaStudent.length;i++)
{
document.writeln("<td><table><tr>");
document.writeln("<td>")
document.writeln("<table><tr>"+"<td><b>Student Name:</b></td>"+"<td>"+StudentDetails.BaStudent[i].StudentName+"<td></tr>");
document.writeln("<tr>"+"<td><b>Roll_No:</b></td>"+"<td>"+StudentDetails.BaStudent[i].Roll_No+"<td></tr>");
document.writeln("<tr>"+"<td><b>Stream:</b></td>"+"<td>"+StudentDetails.BaStudent[i].Stream+"<td></tr>");
document.writeln("<tr>"+"<td><b>Course:</b></td>"+"<td>"+StudentDetails.BaStudent[i].Course+"<td></tr>");
document.writeln("</td>");
document.writeln("</tr></table></td>");
}
document.writeln("</tr></table>");
</script>
</body>
</html>
Now save this code in html format and execute on web browser.
This is the complete description of creating array object in javascript using JSON.
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