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Part VIOther Values of Patterns

Part Overview

This part extends the notion of patterns containing variation by illustrating different types of variation that can occur besides functionality.

Chapter	Discusses These Topics
18	The Observer Pattern How to contain variation in both which object wants to be notified and under what circumstances.
19	The Template Method How to both eliminate redundancy and encapsulate a procedure to be followed. Alternatively, how to have variations in the implementations of the steps you must take.

Chapter

Discusses These Topics

The Observer Pattern

How to contain variation in both which object wants to be notified and under what circumstances.

The Template Method

How to both eliminate redundancy and encapsulate a procedure to be followed. Alternatively, how to have variations in the implementations of the steps you must take.

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