<% if params.has_key?(:which_post) %> <% which_post = params[:which_post] %> <% else %> <% which_post = @user.messages.last.id %> <% end %>

<% for message in @user.messages.reverse[(0..9)] %> <% unless message.id == which_post %> <%= message.content %>
<% end %> <% end %>