title: Jquery select all elements that have $jquery.data()
body: <p>Select elements that i have previously set with <code>jquery.data();</code></p>
  
  <p>i.e. Select all elements with <code>.data('myAttr')</code> already been set.</p>
  
  <p><strong>SOLUTION</strong>  </p>
  
  <p>A jsfiddle to demostrate is  <strong><a href="http://jsfiddle.net/argiropoulostauros/xynZA/3/">Fiddle</a></strong></p>