Efferent Coupling

[rcmedeiros]

Hi.

First I wanna say that I really enjoyed this repo, going through such exercises is precisely my learning style.

Now about the issue:

Which is NOT true about Efferent Coupling?
1. [   ] Classes with high efferent will affect other classes when changes are made.
2. [   ] A large Efferent Coupling can indicate that a class is unfocused and may also indicate that it is unstable since it depends on the stability of all the types to which it is coupled.
3. [ x ] Classes with high Efferent Coupling will receive the effects of changes or defects in other classes.
4. [   ] It is a Code Quality metric.

The answer is actually inverted. If a class has a high efferent coupling, it means it has lots of dependencies. thus..

• option 1 is not true and should be marked, because the class being measured has no influence over its dependencies;
• option 2 is true;
• option 3 is true and should not be marked, because the class being measured will be affected by chances or defects in classes it depends on;
• option 4 is true.

[danieldanielecki]

@rcmedeiros, thanks.

I also read the article: https://www.informit.com/articles/article.aspx?p=1561879&seqNum=3, and it seems to me the keyword here is affect; if it would be receive, then it would be true.

"Efferent coupling measures the number of classes on which a given class depends. A good way to remember efferent (versus afferent) is that classes with high efferent coupling will receive the effects of changes or defects in other classes."