title: when a jQuery selector saved in a variable if element remove how to know removed
body: <p>in Similar questions, It is said that get length attribute if not 0 mean exist.</p>
  
  <p>But in the past you select element and save in a variable after remove element, if you get length will see length not 0 !!!!</p>
  
  <p>test this in jQuery 1.10.2</p>
  
  <pre><code>var x = $("h3:first")
  $("h3:first").remove();
  x.length
  </code></pre>