title: app.get(name) vs app.get(path, [callback...], callback) in Express
body: <p>I am new to Express, from the API docs it seems we have two <code>app.get()</code> methods one to get the value of a variable, the other most of us are familiar with to handle http GET requests.</p>
  
  <p>What is the difference between these two? How does Express know which one we want? Are they actually the same function?</p>