gistfile1.txt

<ul class="profile_info<%= yield :suffix %>">
  <li><%= link_to(fb_name(owner, :use_you => false, :linked => false), owner) %></li>
  <% if local_assigns.include?(:phone) %>
    <li class="phone"><%= phone %></li>
  <%end%>
  <% if local_assigns.include?(:location) %>
    <li><%= location %></li>
  <%end%>
</ul>
content_for :suffix do
  mode    = 0
  mode   += 1 if local_assigns.include?(:phone)
  mode   += 1 if local_assigns.include?(:location)
  [ '', '_dual', '_triple' ][ mode ]
end