title: What is the difference between jQuery has() and filter() methods?
body: <p>What is the difference between <code>$.has('selecor')</code> and <code>$.filter('selector')</code> methods, and which one of them is better?</p>
  
  <p>Both of them seem to perform the same operation, maybe there are some <em>performance benefits</em> of using one instead of other?</p>