Design Principle

Identify the aspects of your application that ____ and separate them from what stays the ____.

Design Principle

Identify the aspects of your application that vary and separate them from what stays the same.

(Page 9)

Design Principle

Program to an _________,

not an ______________.

Design Principle

Program to an interface,

not an implementation.

(Page 11)

Design Principle

Favor ___________ over ___________.

Design Principle

Favor composition over inheritance.

(Page 23)

This pattern defines a family of algorithms, encapsulates each one, and makes them interchangeable. This pattern lets the algorithm vary independently from clients that use it.

What is this design pattern's name?

The Strategy Pattern

(Page 24)

This pattern desines a one-to-many dependence between objects so that when one object changes state, all of its dependents are notified and updated automatically.

What is this design pattern's name?

The Observer Pattern

(Page 51)

Design Principle

Strive for _______ coupled designs between objects that interact.

Design Principle

Strive for loosely coupled designs between objects that interact.

(Page 53)

The Observer Pattern is a combination of publishers and subscribers.

(Page 45)

Design Principle

Classes should be open for _________, but closed for ____________.

Design Principle

Classes should be open for extension, but closed for modification.

(Page 86)

This pattern attaches additional responsibilities to an object dynamically. This pattern provides a flexible alternative to subclassing for extending functionality.

What is the name of this design pattern?

The Decorator Pattern

(Page 91)

Decorators have the same supertype as the objects they decorate.

(Page 90)

Decorators and concrete components don't mix.

"If you have code that relies on the concrete component's type, decorators will break that code."

(Page 99)