title: jQuery empty selector (null selector)
body: <p>Sometimes it is useful to have an empty jQuery object, to be used either as a default value or as an initial value, when constructing a collection of items.</p>
  
  <p>For an example, see <a href="http://www.west-wind.com/Weblog/posts/499259.aspx" rel="noreferrer">here</a>.</p>
  
  <p>One way to do it would be to use a selector which is unlikely to match anything, like <code>$('skdhjfksjdhfksjhdf')</code>, but this is obviously inelegant.</p>
  
  <p>How can I get an empty jQuery object in elegant style ?</p>