v2ex_node

sample.js

function(req, res, db) {
    db.collection("location").count(function(err, location_count){
        db.collection("actor").count(function(err, actor_count){
           db.collection("record").count(function(err, record_count){
                res.json({
                    location_count: location_count,
                    actor_count: actor_count,
                    record_count: record_count
                });
           });
        });
    });
};

Horrible implementation. Use promises.