Chapter 6. Specification of Observable Behavior
FAQ 6.01 What is the purpose of this chapter?
To provide a practical technique that reduces the ripple effect during both development and maintenance. The technique provided in this chapter is fundamental to understanding proper inheritance as well as reducing both short-term and long-term costs, especially for large systems.
The basic idea is to unambiguously state the external behavior of each member function in some well-known location, then for other programmers to rely on this specification rather than digging into the code and relying on the implementation. This technique is sometimes called ...
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