Node Exists ?

Check whether if a node exists ?

by Varun Krishna P

JavaScript

$(function() {
    var sampleData = {            
            "student": [
                {
                    "sn_no": "001",
                    "r_no" : "R001",
                    "s_name": "Student 1"
                },
                {
                    "sn_no": "002",
                    "r_no" : "R002",
                    "s_name": "Student 2"
                },
                {
                    "sn_no": "003",
                    "r_no" : "R003",
                    "s_name": "Student 3"
                },
                {
                    "sn_no": "004",
                    "r_no" : "R004",
                    "s_name": "Student 4"
                },
                {
                    "sn_no": "005",
                    "r_no" : "R005",
                    "s_name": "Student 5"
                },
                {
                    "sn_no": "006",
                    "r_no" : "R006",
                    "s_name": "Student 6"
                },
                {
                    "sn_no": "007",
                    "r_no" : "R007",
                    "s_name": "Student 7"
                },
                {
                    "sn_no": "008",
                    "r_no" : "R008",
                    "s_name": "Student 8"
                },
                {
                    "sn_no": "009",
                    "r_no" : "R009",
                    "s_name": "Student 9"
                },
                {
                    "sn_no": "0010",
                    "r_no" : "R0010",
                    "s_name": "Student 10"
                },
            ]
        };
    /*var sampleData = {
         {message: "Something went wrong.Please try later }
    };*/
    /*
    How ever when checking if(typeof sampleData.student != undefined it wasn't working. But if I do this if(sampleData.student != undefined it is working. */
});