title: nodejs - mongodb - how to find all where a != b?
body: <p>this is how I imagine it</p>
  
  <pre><code>    //b is variable
      collection.findAll({a:'!'+b}function(err, cursor) {
  
      });
  </code></pre>
  
  <p>What the correct way to that query, find all result where a != b ?</p>