gistfile1.rb

# layout_helper.rb
module LayoutHelper
  def headjs
    ["/javascripts/jquery.js","/javascripts/rails.js","/javascripts/application.js"]
  end
   
  def headjs_show
    "<script type='text/javascript'>
		head.js('#{headjs.join('\',\'')}');
		</script>"
  end
  
  def javascript(script)
    headjs << script
  end
end

# _javascript.html.haml

- javascript 'foo1.js'
- javascript 'foo2.js'

= headjs_show

# ouputs
# <script type='text/javascript'>
# head.js('/javascripts/jquery.js','/javascripts/rails.js','/javascripts/application.js');
# </script>

# would be nice if it did this
# <script type='text/javascript'>
# head.js('/javascripts/jquery.js','/javascripts/rails.js','/javascripts/application.js','foo1.js','foo2.js');
# </script>