Mongo select deeper column

mongo_select_deeper_column.js

var cursor = db.VirtualMachine.find().limit(10);//
var map = function() {
    emit(this._id, this.Name);
};

var emit = function(key, value) {
    print("id: " + key + "  Name: " + tojson(value));
};

while (cursor.hasNext()) {
    var doc = cursor.next();
    map.apply(doc);
}