Rails
match ':controller(/:action(/:id(.:format)))'
matches everything to a controller, action, id, format
Redirect: changes the url instead of just rendering something else
redirect_to (:action => "other hello")
params: contains all GET and POST variables
active record is a commonly used ensign pattern for relational db
ActiveRecord: rails implementation of the active record pattern
Retrieve/manipulate database data as objects
ActiveRelation (ARel)