Facebook App Users List

Question

I am fairly new to the Facebook APIs. I want to get a list of my friends who have also installed my app. (The idea being you can then start a game with them).

This gives

Answer 1

Use this query in JS

function getAppFriends()
{

    var fql = "SELECT uid, name, pic_square, is_app_user 
               FROM user 
               WHERE uid IN (SELECT uid2 FROM friend WHERE uid1 = me()) 
               OR uid IN(SELECT uid1 FROM friend WHERE uid2=me()) 
               ORDER BY  name";

    var query = FB.Data.query(fql);

    query.wait(function(responseFromFb){

       if(responseFromFb!=null){

           // Read the responseFromFb and check for 
           // is_app_user = true and list them out the way 
           // you want to.

       }

    });// anonymus function closes here
} //function ends here

Answer 2

This is I believe the FQL query

$facebook->api(array('method' => 'fql.query', 'query' => "SELECT uid FROM user WHERE is_app_user = '1' AND uid IN (SELECT uid2 FROM friend WHERE uid1 = '" . $user_id . "');"));

(I use java and JS APIs so the syntax may not be exactly correct)

The documentation for the user and friend queries are here:

http://developers.facebook.com/docs/reference/fql/user/

http://developers.facebook.com/docs/reference/fql/friend/