// Defining variable and converting JSON data

var userData = JSON.stringify([
    {
        "id" : 101,
        "firstName" : "Rohit",
        "lastName" : "Sharma",
        "email": "srrexhsharma@gmail.com",
        "phone" : 9999477068,
        "address" : { "houseNo": "G-145 A", "street": "Street No. 14", "colony" : "Kunwar Singh Nagar", "landmark" : "Hanuman Mandir, Nangloi", "City" : "Delhi", "State" : "New Delhi", "PIN" : 110041},
        "alternateNo" : 7503070277

    },
    {
        "id" : 102,
        "firstName" : "Dheeraj",
        "lastName" : "Sharma",
        "email": "perfectdheerajsharma@gmail.com",
        "phone" : 7503070277,
        "address" : { "houseNo": "G-145 A", "street": "Street No. 14", "colony" : "Kunwar Singh Nagar", "landmark" : "Hanuman Mandir, Nangloi", "City" : "Delhi", "State" : "New Delhi", "PIN" : 110041},
        "alternateNo" : 9999477068

    },
    {
        "id" : 103,
        "firstName" : "Salman",
        "lastName" : "Malik",
        "email": "salmanmaliksahab@gmail.com",
        "phone" : 9899618647,
        "address" : { "houseNo": "45 B", "street": "Street No. 4", "colony" : "Nanngloi No. 2", "landmark" : "Metro Station, Nangloi", "City" : "Delhi", "State" : "New Delhi", "PIN" : 110041},
        "alternateNo" : 7503070277

    },
    {
        "id" : 104,
        "firstName" : "Nitish",
        "lastName" : "Kumar",
        "email": "ennitish@gmail.com",
        "phone" : 9654774788,
        "address" : { "houseNo": "B-87", "street": "Street No. 6", "colony" : "Shiv Ram Park", "landmark" : "Hanuman Mandir, Nangloi", "City" : "Delhi", "State" : "New Delhi", "PIN" : 110041},
        "alternateNo" : 7503070277

    }
]);

// Function to read data from JSON stored variable

function readData()
{
    var userDb = JSON.parse(userData);
    console.log(userDb);
}

// calling readData function
readData();

// Function to find particular entry from JSON store using name or id

function findEntryById(id){
    var data = JSON.parse(userData);
    console.log(data.filter(function(person){
        return person.id == id;
    }));
}

// calling findEntryByName function
findEntryById();

// Function to find a particular entry by its position/index

function findEntryByPosition(position){
    var dataNew = JSON.parse(userData);
    console.log(dataNew[position]);
}

// calling findEntryByPosition function
findEntryByPosition();