module ActionDispatch::Routing::Mapper::Scoping

Using this, the +:id+ parameter here will default to 'home'.
end
match 'scoped_pages/(:id)', :to => 'pages#show'
defaults :id => 'home' do
Allows you to set default parameters for a route, such as this:

def defaults(defaults = {})
  scope(:defaults => defaults) { yield }
end