Factor implementation differences into subcomponents
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Revision as of 06:34, 12 August 2008
This is Rule 10 in Johnson and Foote 1988.
If different subclasses implement a method in one of a few ways, then the method may not be directly related to the superclass and the implementation should be separated by creating a class hierarchy and composing it within the superclass.
This means that multiple subclasses can contain the same implementation without repeated code.
