Parsing a message in JavaScript with JSON
In the previous section of example we have studied how
to create message in JSON in JavaScript and now we will come to know that how we
can parse the message in JSON in JavaScript.
We can parse the message with JSON in JavaScript by
using the method "String.parseJSON(filter)". It parses the JSON
message to an string or object. The parameter "filter" is optional in
this method which is used to filter message or transform their results. This
method internally uses the JavaScript's method eval() to parse messages.
Here is the full example code for ParseMessageJSON.htm as follows:
ParseMessageJSON.htm
<html>
<head>
<title>Parsing Message using JSON in JavaScript</title>
<script language="javascript" src="json2.js"></script>
<script language="javascript" >
var students = {
"Maths" : [
{ "Name" : "Amit", // First element
"Marks" : 67,
"age" : 23 },
{
"Name" : "Sandeep", // Second element
"Marks" : 65,
"age" : 21 }
]
}
// Printing Maths array values in the alert message
var i=0
var arrayObject = new Array();
for(i=0;i<students.Maths.length;i++)
{
arrayObject.push(students.Maths[i].Name);
arrayObject.push(students.Maths[i].Marks);
arrayObject.push(students.Maths[i].age);
}
alert("Parsing JSON Message Example ");
alert(arrayObject.toJSONString().parseJSON());
</script>
</head>
<body>
Parsing Message using JSON in JavaScript
</body>
</html>
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To run this example we need to have json2.js file
included with our ParseMessageJSON.htm file. File "json2.js" is
as same as in our previous example of "creating message in JavaScript
with JSON" .
Output:
Run ParseMessageJSON.htm file on your browser.
It will generate output on your browser as follows:
Download Code
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