layout.erb

<% unless @stylesheets.nil? %>
  <% @stylesheets.each do |stylesheet| %>
    <link rel="stylesheet" type="text/css" media="screen" href="/articles/<%= params[:article] %>/<%= stylesheet %>.css" />
  <% end %>
<% end %>

<% unless @javascripts.nil? %>
  <% @javascripts.each do |javascript| %>
    <script type="text/javascript" src="/articles/<%= params[:article] %>/<%= javascript %>.js"></script>
  <% end %>
<% end %>