title: How to skip the async calls in node.js
body: <p>Is there any way to skip the calls in serial or parallel calls flow. </p>
  
  <pre><code>var flow = require('flow');
  
      flow.exec(
         function(){
           //Execute
         },
         function(){
           //Skip
         },
         function(){
          //Exec
         },
         function(){
           //Done
         }
      );
  </code></pre>