title: Connecting to mongodb
body: <p>Code:</p>
  
  <pre><code>     var Db = require('mongodb').Db,
          Server = require('mongodb').Server,
          Client = new Db('test', new Server('127.0.0.1', 52235, {}))
  </code></pre>
  
  <p>In Function:
           ...</p>
  
  <pre><code>     Client.open(function(err, pClient) {
          Client.collection('test_insert', function(err, collection){
              collection.find().toArray(function(err, results) {
                  console.log(results);
              });
          });
          // etc.
       });
  </code></pre>
  
  <p>This shows error: Cannot read property 'arbiterOnly' of undefined
  can you help me?</p>