title: Rails: Showing 10 or 20 or 50 results per page with will_paginate how to?
body: <p>me again...</p>
  
  <p>I need show 10 or 20 or 50 results number of results per page with a select options  in my list of posts using will_paginate plugin</p>
  
  <p>Can you help me please?</p>
  
  <p>Thanks!</p>