added example for condition with array argument

README.rdoc

@@ -140,7 +140,25 @@ You can easily define your own conditions:
   get '/win_a_car' do
     "Sorry, you lost."
   end
+
+For a condition that takes multiple values use a splat:
+
+  set(:auth) do |*roles|   # <- notice the splat here
+    condition do
+      unless logged_in? && roles.any? {|role| current_user.in_role? role }
+        redirect "/login/", 303 
+      end
+    end
+  end
 
+  get "/my/account/", :auth => [:user, :admin] do
+    "Your Account Details"
+  end
+
+  get "/only/admin/", :auth => :admin do
+    "Only admins are allowed here!"
+  end
+
 === Return Values
 
 The return value of a route block determines at least the response body passed