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Wednesday, February 08, 2006

Behavioral Patterns

  1. Behavioral patterns are those patterns that are most specifically
    concerned with communication between objects. In this chapter, we’ll see

    •The Observer pattern defines the way a number of classes can be notified
    of a change,
    •The Mediator defines how communication between classes can be
    simplified by using another class to keep all classes from having to know
    about each other.
    •The Chain of Responsibility allows an even further decoupling between
    classes, by passing a request between classes until it is recognized.
    •The Template pattern provides an abstract definition of an algorithm, and
    •The Interpreter provides a definition of how to include language elements
    in a program.
    •The Strategy pattern encapsulates an algorithm inside a class,
    •The Visitor pattern adds function to a class,
    •The State pattern provides a memory for a class’s instance variables.
    •The Command pattern provides a simple way to separate execution of a
    command from the interface environment that produced it, and
    •The Iterator pattern formalizes the way we move through a list of data
    within a class.

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