接下来是一个叫“Java pass by value”的长贴,楼主说有一天在LinkedIn.com上看到了Java Group里有人讨论Java是pass by value的,长达240+贴子。贴子里说,如果你使用Java的原始类型如int, long,就是传值,如果你用object, array,其实传的是一个引用的拷贝,所以,Java是传值的。呵呵,你觉得有道理吗?于是,成就了这个大讨论战。reddit.com上也有N多的回贴。有空可以看看。
今天在网上看到网页叫“Object Orientation Isa Hoax”——面向对象是一个骗局,标题很有煽动性(注:该网站上还有一个网页叫Object Orientation Is Dead),好吧,打开看看上面有些 什么,发现这个网页是在收集一些关于“面向对象的反动言论”,没想到的是,很多言论出自很多大师之口。比如:Alexander Stepanov和Bjarne Stroustrup。这些言论挺有意思的,所以,我摘两段在下面:
Question:
I think STL and Generic Programming mark a definite departure from the common C++ programming style, which I find is almost completely derived from SmallTalk. Do you agree?
Answer:
Yes. STL is not object oriented. I think that object orientedness is almost as much of a hoax as Artificial Intelligence. I have yet to see an interesting piece of code that comes from these OO people. In a sense, I am unfair to AI: I learned a lot of stuff from the MIT AI Lab crowd, they have done some really fundamental work: Bill Gosper’s Hakmem is one of the best things for a programmer to read. AI might not have had a serious foundation, but it produced Gosper and Stallman (Emacs), Moses (Macsyma) and Sussman (Scheme, together with Guy Steele). I find OOP technically unsound. It attempts to decompose the world in terms of interfaces that vary on a single type. To deal with the real problems you need multisorted algebras families of interfaces that span multiple types. I find OOP philosophically unsound. It claims that everything is an object. Even if it is true it is not very interesting saying that everything is an object is saying nothing at all. I find OOP methodologically wrong. It starts with classes. It is as if mathematicians would start with axioms. You do not start with axioms you start with proofs. Only when you have found a bunch of related proofs, can you come up with axioms. You end with axioms. The same thing is true in programming: you have to start with interesting algorithms. Only when you understand them well, can you come up with an interface that will let them work.