title: Node.js monitor file for changes and parse them
body: <p>I need to monitor a file for changes. Due to a large amount of new entries to this file I would need to 'monitor' this file. I would need to get the new inserted content to this file to be able to parse this content.</p>
  
  <p>I found this code:</p>
  
  <pre><code>fs.watchFile('var/log/query.log', function() {
  console.log('File Changed ...');
  //how to get the new line which is now inserted?
  });
  </code></pre>