title: jQuery - element passed by reference only?
body: <pre><code>&lt;html&gt;
  &lt;head&gt;
  &lt;script class="jsbin" src="http://ajax.googleapis.com/ajax/libs/jquery/1.4.4/jquery.min.js"&gt;&lt;/script&gt;
  &lt;meta charset=utf-8 /&gt;
  &lt;title&gt;JS Bin&lt;/title&gt;
    &lt;script type="text/javascript"&gt;
    $(document).ready(function () {
      var p = $('#hello');
      $(p).text('Yes');
    });
    &lt;/script&gt;
  &lt;/head&gt;
  &lt;body&gt;
    &lt;p id="hello"&gt;Hello World&lt;/p&gt;
  &lt;/body&gt;
  &lt;/html&gt;
  </code></pre>
  
  <p>The code above resulting change the text inside <code>&lt;p&gt;</code> element, but is it reasonable?
  Because it already 2 set of <code>&lt;p&gt;</code> element.</p>