title: display 15-minute steps between two given times
body: <p>I have an appointments table which saves 2 times. start and end. I want to display all appointments in 15 minute steps. e.g. given 10am /11am, now display me 10.15, 10.30, 10.45 in my view! Thx for advise!</p>
  
  <pre><code>-@appointment.each do |form|  
    =form.date  
    =form.start_time  
    =form.end_time
  </code></pre>