You’d like to decrease the dependency certain parts of your application have on other parts of it to keep things flexible and clean, especially when you need to take action in one part of your application when something in another part changes.
In Flex, use binding tags,
ChangeWatchers, to be notified when state changes occur in another part of the application.
In Rails, use the ActiveRecord lifecycle methods and observers to take action when certain events take place on your models.
As you’ve gone through this book and seen how powerful and useful Flex’s binding syntax is for cleaning up your code, you may have ...