title: why $.isEmptyObject($('#id-does-not-exist-on-page')) returns false?
body: <p>I'm  little confused by <code>jQuery.isEmptyObject method</code>.</p>
  
  <p><code>$.isEmptyObject([])</code> -> returns true</p>
  
  <p>but</p>
  
  <p><code>$('#id-does-not-exist-on-page')</code> => []</p>
  
  <p><code>$.isEmptyObject($('#id-does-not-exist-on-page'))</code> returns false</p>
  
  <p>why ?
  thanks.</p>