title: How to order items in ETS?
body: <p>i insert many items in ETS like this:</p>
  
  <pre><code>ets:insert{{users, jim, 9}}
  ets:insert{{users, ham, 3}}
  ets:insert{{users, why, 2}}
  ets:insert{{users, dhh, 3}}
  ets:insert{{users, zend, 4}}
  </code></pre>
  
  <p>so how to get the ordered list by one number in item?</p>
  
  <pre><code>[
     {users, why, 2},
     {users, ham, 3},
     {users, dhh, 3},
     {users, zend, 4},
     {users, jim, 9}
  ]
  </code></pre>