![[info]](http://l-stat.livejournal.com/img/userinfo.gif){kind=small}
C++ FQA
[21.6] Is a Circle a kind-of an Ellipse?
FAQ: Sometimes it is, most frequently it isn't.
Q: But I have a Ph.D. in Mathematics, and I'm sure a Circle is a kind of an Ellipse! Does this mean Marshall Cline is stupid? Or that C++ is stupid? Or that OO is stupid?
FAQ: It means a different thing: your intuition is wrong in the sense that it leads you to make wrong decisions about inheritance. The right way to think about "kind-of" is this: B is a kind of A if you can always substitute a B for an A.
FQA: Instead of admitting that OO is not a natural language, and it doesn't have to map directly to a natural language, the FAQ actively tries to persuade you to change the way you use natural language words to make your thinking OO-compatible. Next, they'll ship patches you should apply to your DNA, and a sticker saying "Designed for C++ Programming" for your skull.
http://yosefk.com/c++fqa/inheritance-pr
Читаю уже неделю потихоньку, ржу в голос.
FAQ: Sometimes it is, most frequently it isn't.
Q: But I have a Ph.D. in Mathematics, and I'm sure a Circle is a kind of an Ellipse! Does this mean Marshall Cline is stupid? Or that C++ is stupid? Or that OO is stupid?
FAQ: It means a different thing: your intuition is wrong in the sense that it leads you to make wrong decisions about inheritance. The right way to think about "kind-of" is this: B is a kind of A if you can always substitute a B for an A.
FQA: Instead of admitting that OO is not a natural language, and it doesn't have to map directly to a natural language, the FAQ actively tries to persuade you to change the way you use natural language words to make your thinking OO-compatible. Next, they'll ship patches you should apply to your DNA, and a sticker saying "Designed for C++ Programming" for your skull.
http://yosefk.com/c++fqa/inheritance-pr
Читаю уже неделю потихоньку, ржу в голос.