Recently printers connected to the Internet became common. As some of my web services required printing in the background process, I have researched Google Cloud Print API as one of printing measures. (0) Get a client ID and a client secre…

Points Call MongoClient.connect only once, and reuse the instance. Connection management is done by the driver and the number of connections can be specified in the option of MongoClient.connect. Sample Code db.js // Keep the mongoDB conne…