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Efferent coupling

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Efferent coupling

Efferent Coupling is a metric in software development. It measures the number of data types a Class (computer science) knows about.

This includes inheritance, interface implementation, parameter types, variable types, and exceptions.

A large efferent coupling can indicate that a class is unfocused. It may also indicate brittleness, since it depends on the stability of all the types to which it is coupled.



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