<table>
  <tr>
  <% for column in session['select_columns'] %>
    <th><%= column %></th> 
  <% end %>
  </tr>
  
  <% for customer in @customers %>
    <tr>
    <% for column in session['select_columns'] %>
      <td><%=h customer.send(column) %></td> 
    <% end %>
    </tr>
  <% end %>
</table>