Rails 2.2 : Memoization
Memoization is a pattern of initializing a method once and then stashing its value away for repeat use.
extend ActiveSupport::Memoizable def full_name "#{first_name} #{last_name}" end memoize :full_name
Ruby on Rails 2.2 Release Notes - 9.1 Memoization
ヽ( ・∀・)ノくまくまー(2008-10-25) Memoization (ActiveSupport::Memoizable)