My JSON objects look like this:

[{
  "aid": "1",
  "atitle": "Ameya R. Kadam"
}, {
  "aid": "2",
  "atitle": "Amritpal Singh"
}, {
  "aid": "3",
  "atitle": "Anwar Syed"
}, {
  "aid": "4",
  "atitle": "Aratrika"
}, {
  "aid": "5",
  "atitle": "Bharti Nagpal"
}]

As you can see the names are differentiated through their associated aid's. Now suppose I want to display the name stacked with aid: 4. what js should i write for that?

My JSON objects look like this:

[{
  "aid": "1",
  "atitle": "Ameya R. Kadam"
}, {
  "aid": "2",
  "atitle": "Amritpal Singh"
}, {
  "aid": "3",
  "atitle": "Anwar Syed"
}, {
  "aid": "4",
  "atitle": "Aratrika"
}, {
  "aid": "5",
  "atitle": "Bharti Nagpal"
}]

As you can see the names are differentiated through their associated aid's. Now suppose I want to display the name stacked with aid: 4. what js should i write for that?

• javascript
• json

4 Answers 4

What I would suggest is modify the JSON if possible to use the AID as the key for the list of objects instead of just sending a list. If you can't change the JSON I would put the objects into an associative array using there AID as the key so you can directly get to the objects as needed.

You could loop over the elements of your array, testing, for each one, if its aid is 4 :

var list = [{"aid":"1","atitle":"Ameya R. Kadam"},
        {"aid":"2","atitle":"Amritpal Singh"},
        {"aid":"3","atitle":"Anwar Syed"},
        {"aid":"4","atitle":"Aratrika"},
        {"aid":"5","atitle":"Bharti Nagpal"}
    ];
var length = list.length;
var i;
for (i=0 ; i<length ; i++) {
    if (list[i].aid == 4) {
        alert(list[i].atitle);
        break; // Once the element is found, no need to keep looping
    }
}

Will give an alert with "Aratrika"

you can simple do

var someValue = [{
  "aid": "1",
  "atitle": "Ameya R. Kadam"
}, {
  "aid": "2",
  "atitle": "Amritpal Singh"
}, {
  "aid": "3",
  "atitle": "Anwar Syed"
}, {
  "aid": "4",
  "atitle": "Aratrika"
}, {
  "aid": "5",
  "atitle": "Bharti Nagpal"
}];
console.log(someValue[3]["atitle"]);

This should give you "Aratrika"

Alternatively you could loop and iterate through all objects.

The only thing you can do (as far as I know), is searching for the aid:4 pair using a for loop:

a = [ /* data here ... */ ];
for (var i = 0; i < a.length; i++) {
    if (a[i].aid == 4) {
        name = a[i].name;
        break;
    }
}

I don't think there's an easier way to do that.