JSON Array Object Program

INTRODUCTION

A JSON Array is an ordered sequence of values. Its external text form is a string wrapped in square brackets with commas separating the values. A JSON Object is an unordered collection of name/value pairs.

Simple Array Objects Syntax

JSON objects can be created with JavaScript.

Let us see the various ways of creating JSON objects using JavaScript.

Creation of an empty Object
var JSONOb = {};

Creation of a new Object
var JSONOb = new Object();
Creation of an object with attribute bookname with value in string, attribute price with numeric value. Attribute is accessed by using '.' Operator,
var JSONObj = {"bookname":"VB BLACK BOOK", "price":500};

Example for JSON Array Object run in HTML

<html>
<head>
<title>Creation of array object in javascript using JSON</title>
<script language = "javascript" >
document.writeln("<h2>JSON array object</h2>");
var books = { "Java" : [
{ "Name" : "Core Java", "price" : 600 },
{ "Name" : "Guide to Java", "price" : 400 }],
"JSP" : [
{ "Name" : "Basics of JSP", "price" : 1000 },
{ "Name" : "Tutorial of JSP", "price" : 1300 }]
}
var i = 0
document.writeln("<table border = '2'><tr>");
for(i = 0;i<books.Java.length;i++){
document.writeln("<td>");
document.writeln("<table border = '1' width = 100 >");
document.writeln("<tr><td><b>Name</b></td><td width = 50>" + books.Java[i].Name+"</td></tr>");
document.writeln("<tr><td><b>Price</b></td><td width = 50>" + books.Java[i].price +"</td></tr>");
document.writeln("</table>");
document.writeln("</td>");
}
for(i = 0;i<books.JSP.length;i++){
document.writeln("<td>");
document.writeln("<table border = '1' width = 100 >");
document.writeln("<tr><td><b>Name</b></td><td width = 50>" + books.JSP[i].Name+"</td></tr>");
document.writeln("<tr><td><b>Price</b></td><td width = 50>" + books.JSP[i].price+"</td></tr>");
document.writeln("</table>");
document.writeln("</td>");
}
document.writeln("</tr></table>");
</script>
</head>
<body>
</body>
</html>

Output

Result

Thus, we have successfully learned the JSON Array object creation program.