class Clean < Array
	def update
		['.yardoc','log','tmp','obj'].each{|dir| 
			CLEAN.include(dir) if File.exists?(dir)
		}	
		
        CLEAN.include('**/*.{suo,sdf}')

        add '<%Rake::Task[:clean].reenable%>'
        add '<%Rake::Task[:clean].invoke%>'
	end
end