Interface Observer

behavioral/observer/main.go:20–24

Observer defines a standard interface for instances that wish to list for the occurrence of a specific event.

	// Observer defines a standard interface for instances that wish to list for
	// the occurrence of a specific event.
	Observer interface {
		// OnNotify allows an event to be "published" to interface implementations.
		// In the "real world", error handling would likely be implemented.
		OnNotify(Event)
	}

	// Notifier is the instance being observed. Publisher is perhaps another decent
	// name, but naming things is hard.