#define 2 methods in global helper
def logged_in_only(is_iser_logged_in)
  yield if is_iser_logged_in == true
end

def not_logged_in(is_iser_logged_in)
  yield if is_iser_logged_in == false
end

#and then adding the following to my application's layout

<% logged_in_only(current_user.logged_in?)  %>
  <p>some info here</p>
<% end %>

<% not_logged_in(current_user.logged_in?)  %>
  <p>some other info here</p>
<% end %>