nodeJS+ntwitter

followingPruner

var twitter = require('ntwitter');

var twit = new twitter({
  consumer_key: 'PASTE YOURS HERE',
  consumer_secret: 'PASTE YOURS HERE',
  access_token_key: 'PASTE YOURS HERE',
  access_token_secret: 'PASTE YOURS HERE'
});

var userID = PASTE YOUR NUMERIC TWITTER ID HERE;

success = function(result){
        console.log(result);
}

var friends=[];

prune = function(err, result){
        var idList = result;
        for(i=0;i<idList.length;i++){
                friends[i]=idList[i];
        }
        twit.getFollowersIds(userID, function(err, response) {
                var foundUsers=[];
                for(i=0;i<response.length;i++){
                        var userIndex = friends.indexOf(response[i]);
                        if(userIndex!=-1)friends.splice(userIndex, 1);
                }
                for(i=0;i<friends.length;i++) {
                        twit.destroyFriendship(friends[i], function (err,cb) {
                                console.log('Removed ID #: ' + cb);
                        });
                }

        });
}

twit.getFriendsIds(userID, prune);