title: Javascript var = int || int?
body: <p>Little question, maybe it's a basic one .... but </p>
  
  <p>What should be the value of ub ?</p>
  
  <p>Suppose that getuploadedBytes return an Int, 
  the value of ub should suppose to be what ? </p>
  
  <p>The min or max value between method and right operator ?</p>
  
  <pre><code>ub = that._getUploadedBytes(jqXHR) || (ub + o.chunkSize);
  </code></pre>