title: How to determine if a vertex has odd or even number of outE()?
body: <p>I wanna get the vertex that has odd number of edges. Something like these:</p>
  
  <pre><code> g.V().where(out().count() % 2 != 0)
  </code></pre>
  
  <p>Of course, <code>%</code> can not be used here. Is there a alternative way?</p>