The example given is in the lower level imperative javascript you'd use to speak directly to MongoDB. Often you'd layer a more expressive declarative language

The example given is in the lower level imperative javascript you'd use to speak directly to MongoDB. Often you'd layer a more expressive declarative language on top of that, which is what drivers like MongoMapper or Mongoid provide. Even within the JavaScript interpreter you can be writing declaratively, like this jLINQ example: http://somewebguy.wordpress.com/2010/02/14/jlinq-in-mongodb-oh-snap/ http://somewebguy.wordpress.com/2010/02/14/jlinq-in-mongodb-...