强大的ruby模版：ERB

#http://stdlib.rubyonrails.org/

require "erb"
  # Build template data class.
  class Product
    def initialize( code, name, desc, cost )
      @code = code
      @name = name
      @desc = desc
      @cost = cost

      @features = [ ]
    end

    def add_feature( feature )
      @features << feature
    end

    # Support templating of member data.
    def get_binding
      binding
    end

    # ...
  end

  # Create template.
  template = %{
    
      
      

        
<%= @name %> (<%= @code %>)
        
<%= @desc %>

        

          <% @features.each do |f| %>
            
<%= f %>
          <% end %>
        

        

          <% if @cost < 10 %>
            Only <%= @cost %>!!!
          <% else %>
             Call for a price, today!
          <% end %>
        

      
    
  }.gsub(/^  /, '')

  rhtml = ERB.new(template)

  # Set up template data.
  toy = Product.new( "TZ-1002",
                     "Rubysapien",
                     "Geek's Best Friend!  Responds to Ruby commands...",
                     999.95 )
  toy.add_feature("Listens for verbal commands in the Ruby language!")
  toy.add_feature("Ignores Perl, Java, and all C variants.")
  toy.add_feature("Karate-Chop Action!!!")
  toy.add_feature("Matz signature on left leg.")
  toy.add_feature("Gem studded eyes... Rubies, of course!")

  # Produce result.
  rhtml.run(toy.get_binding)