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Web Development with MongoDB and Node.js by Jason Krol

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The basics of NodeJS

With the basics of JavaScript out of the way, let's focus on some of the basics of Node.

Event driven

At its core, one of the most powerful features of Node is that it is event driven. This means that almost all code you write in Node is going to be written in a way that is either responding to an event or is itself firing an event (which in turn will fire off other code listening for that event).

Let's take a look at code that we'll write in a later chapter that handles connecting to a MongoDB server using Mongoose, a popular Node.js MongoDB ODM module:

mongoose.connect('mongodb://localhost/MyApp');
mongoose.connection.on('open', function() {
console.log("Connected to Mongoose...");
});

First, we tell our mongoose object to connect ...

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