强大的ruby模版：ERB-优快云博客

本文介绍了一种使用Ruby语言创建并渲染产品模板的方法。通过定义一个产品类，并为其添加特性，然后利用ERB（Embedded Ruby）来生成带有产品详情的HTML页面。此模板能根据产品的不同特性动态显示相关信息。

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#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 = %{
    <html>
      <head><title>Ruby Toys -- <%= @name %></title></head>
      <body>

        <h1><%= @name %> (<%= @code %>)</h1>
        <p><%= @desc %></p>

        <ul>
          <% @features.each do |f| %>
            <li><b><%= f %></b></li>
          <% end %>
        </ul>

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

      </body>
    </html>
  }.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)