Parsing a JSON Object with multiple Sub-Objects

Question

<script type="text/javascript" src="http://static.stackmob.com/js/2.5.3-crypto-sha1-hmac.js"></script>
<script type="text/javascript">
$j.ajax({
        dataType : 'json',
        url : "/api/core/v2/groups/", //or any other rest call here
        beforeSend: function(xhr) {
            var bytes = Crypto.charenc.Binary.stringToBytes('username' + ":" + 'password');
                    var base64 = Crypto.util.bytesToBase64(bytes);
            xhr.setRequestHeader("Authentication", "Basic " + base64);
        },
        success: function(data, status, xhr) {
            console.log("success!");
            console.log(data);
                        console.log(data[0]);
        }
    });

The output of data is

Object
    data: Array[25]
        0: Object
            contentTypes: Array[4]
            creationDate: "2012-05-31T20:21:20.532+0000"
            creator: Object
            description: "A discussion group for anyone interested in amateur radio."
            displayName: "amd-amateur-radio-forum"
            followerCount: 5
            groupType: "OPEN"
            id: 1133
            memberCount: 3
            modificationDate: "2012-06-04T21:23:07.078+0000"
            name: "AMD Amateur Radio Forum"
            resources: Object
            type: "group"
            viewCount: 62
            __proto__: Object
        1: Object
        2: Object
        3: Object

but when I try to output data[0] or data[1] they all come back as undefined. I am not sure how to deal with this JSON object.

The output of alert(data) is

[Object object]

so I am assuming it is a properly formatted JSON object.

Here is the output JSON.stringify(data)

{"data":[{"contentTypes":["discussions","documents","blog","projects"],"memberCount":3,"creator":{"name":"firstname lastname","level":{"name":"Level I","description":"null","points":7,"resources":{"image":{"ref":"http://connect-dev.amd.com/api/core/v2/images/status/statusicon-47.gif","allowed":["GET"]}}},"username":"dkyle","email":"david.kyle@amd.com","firstName":"firstname","lastName":"lastname","resources":{"self":{"ref":"http://connect-dev.amd.com/api/core/v2/users/4183","allowed":["GET"]},"avatar":{"ref":"http://connect-dev.amd.com/api/core/v2/users/4183/avatar","allowed":["GET"]}},"id":4183},"groupType":"OPEN","name":"AMD Amateur Radio Forum","displayName":"amd-amateur-radio-forum","description":"A discussion group for anyone interested in amateur radio.","followerCount":5,"resources":{"projects":{"ref":"http://connect-dev.amd.com/api/core/v2/groups/1133/projects","allowed":["GET"]},"invites":{"ref":"http://connect-dev.amd.com/api/core/v2/groups/1133/invites","allowed":["POST"]},"documents":{"ref":"http://connect-dev.amd.com/api/core/v2/groups/1133/documents","allowed":["GET","POST"]},"html":{"ref":"http://connect-dev.amd.com/groups/amd-amateur-radio-forum","allowed":["GET"]},"self":{"ref":"http://connect-dev.amd.com/api/core/v2/groups/1133","allowed":["GET"]},"blog":{"ref":"http://connect-dev.amd.com/api/core/v2/blogs/1368","allowed":["GET"]},"members":{"ref":"http://connect-dev.amd.com/api/core/v2/groups/1133/members","allowed":["GET"]},"discussions":{"ref":"http://connect-dev.amd.com/api/core/v2/groups/1133/discussions","allowed":["GET","POST"]}},"id":1133,"type":"group","creationDate":"2012-05-31T20:21:20.532+0000","modificationDate":"2012-06-04T21:23:07.078+0000","viewCount":62},{"contentTypes":["discussions","documents","blog","projects"],"memberCount":34,"creator":{"name":"firstname lastname","level":{"name":"Level I","description":"null","points":24,"resources":{"image":{"ref":"http://connect-dev.amd.com/api/core/v2/images/status/statusicon-47.gif","allowed":["GET"]}}},"username":"username","email":"kristi.fontenot@amd.com","firstName":"firstname","lastName":"lastname","resources":{"self":{"ref":"http://connect-dev.amd.com/api/core/v2/users/4291","allowed":["GET"]},"avatar":{"ref":"http://connect-dev.amd.com/api/core/v2/users/4291/avatar","allowed":["GET"]}},"id":4291},"groupType":"OPEN","name":"AMD Community Corps Connect (Matching Gifts, GIVE and Volunteerism)","displayName":"amd-community-corps-connect-matching-gifts-give-and-volunteerism","description":"Through this community, employees are be able to support the causes they care about most in ways thev have never been able to before. Not only that, employees will be able to connect and network with fellow AMD employees in a way that allows everyone connected to each other to volunteer together, while providing the ability to track volunteer hours, make charitable contributions and request a match all in the same tool.  \r\n\r\nhttp://amd.yourcause.com \r\n\r\n","followerCount":55,"resources":{"projects":{"ref":"http://connect-dev.amd.com/api/core/v2/groups/1074/projects","allowed":["GET"]},"invites":{"ref":"http://connect-dev.amd.com/api/core/v2/groups/1074/invites","allowed":["POST"]},"documents":{"ref":"http://connect-dev.amd.com/api/core/v2/groups/1074/documents","allowed":["GET","POST"]},"html":{"ref":"http://connect-dev.amd.com/groups/amd-community-corps-connect-matching-gifts-give-and-volunteerism","allowed":["GET"]},"self":{"ref":"http://connect-dev.amd.com/api/core/v2/groups/1074","allowed":["GET"]},"blog":{"ref":"http://connect-dev.amd.com/api/core/v2/blogs/1267","allowed":["GET"]},"members":{"ref":"http://connect-dev.amd.com/api/core/v2/groups/1074/members","allowed":["GET"]},"discussions":{"ref":"http://connect-dev.amd.com/api/core/v2/groups/1074/discussions","allowed":["GET","POST"]}},"id":1074,"type":"group","creationDate":"2012-05-07T19:24:31.880+0000","modificationDate":"2012-09-07T02:00:51.821+0000","viewCount":544}

It is actually longer than that

Answer 1

If you are outputting stringifying data and you have inside that an array named data then you need to do data.data[0] instead of data[0].

It would be a little more clear for you if you said:

success: function(result, status, xhr){
  var data = result.data;

Then data[0] would work just fine.