In most cases, functors and ranges cause a minor issue of too many keystrokes, but in some cases, they can cause a serious impediment to maintainability. This chapter will teach you to deal with this problem while it’s still a minor one.
Imperfect C++: Functors and Ranges
About The Author
Eugenia Loli
Ex-programmer, ex-editor in chief at OSNews.com, now a visual artist/filmmaker.
Follow me on Twitter @EugeniaLoli
What the functor?
I’m a C/C++ programmer and after about 2 minutes I still don’t under stand this.
Apparently a functor is a class with the operator() defined for it as a member function. Invoking such operator() looks like a function call.
http://en.wikipedia.org/wiki/Function_object
in particular see the notes regarding prolog and ML
That’s the point… C++ is the magic language too bloated and far too complicated… Of course fuctional programming theory is not the nail to C++ coffin, but if C++ programer with practice has troubles with language mechanisms (I’m sure 90% of programmers would fail serious C++ exam with all elements of language involved) the language is poor… Nowadays, C++ has being gone – professionals choose cleaner C# and Java…
C++ is like any other language, good for some things, poor for others. Real “professionals” will always choose the best tool for the job. For some applications, that tool is C++.
Yes, functors in C++ are objects that can be used in some situations where functions are expected. For example, many STL algorithms (find_if, remove_if, etc etc) take functions or functors as arguments.
Take a look at STL’s std::unary_function and std::binary_function.
90% of games are written in C++. Java, besides being interpeted, only allows one superclass and no function overloading- too weak.
corrrection, operator overloading. Sorry, its late
Nowadays, C++ has being gone – professionals choose cleaner C# and Java…
If you say something often enough, it will become true, right?