$ erubis -XNU example11.rhtml
    1:  _buf = '';

    7:       if @list.nil? || @list.empty? 

    9:       else 

   12:           @list.each_with_index do |item, i| 
   13:                        _buf << ( i % 2 == 0 ? '#FCC' : '#CCF' ).to_s;
   14:                 _buf << ( item ).to_s;

   16:           end 

   19:       end 

   22:  _buf.to_s