gistfile1.rb

  def table_for(models, header, &block)
    tbody = models.map{|m| ['<tr>', block.call(m).map{|d| "<td>#{d}</td>"}, '</tr>'] }.flatten.join
    '<table><thead><tr>' + header.map{|h| "<td>#{h.is_a?(Symbol) ? h.to_s.capitalize : h}</td>"}.join + "</tr><tbody>#{tbody}</tbody></table>"
  end