Smalltalk в примерах/Объект: различия между версиями

inform dependents about changes. An object that changes sends itself a message from the changed: family, and eventually these messages send a message from the update: family to each dependent. Dependents therefore need to override one of the update: messages if they want to take action based on the notification. We talk more about the dependency mechanism in Chapter 19, The Dependency Mechanism.

-->