They will persist for the duration of AppDomain. Changes done to static variable are visible across methods. MSDN: If a local variable is declared with the Static keyword, its lifetime is longer than the execution time of the procedure in which it is declared. If the procedure is inside a module, the static variable survives … Read more
If you wish to count how many times a method has been called, no matter which instance called it, you could use a class member like this: class Foo(object): calls=0 # <— call is a class member def baz(self): Foo.calls+=1 foo=Foo() bar=Foo() for i in range(100): foo.baz() bar.baz() print(‘Foo.baz was called {n} times’.format(n=foo.calls)) # Foo.baz … Read more
From: http://support.microsoft.com/default.aspx?scid=kb;en-us;Q312607 ASP.NET includes application state primarily for compatibility with classic ASP so that it is easier to migrate existing applications to ASP.NET. It is recommended that you store data in static members of the application class instead of in the Application object. This increases performance because you can access a static variable faster than … Read more
No, static members are associated with the Type, which is associated with the AppDomain it’s loaded in. Note that there doesn’t have to be any instances of HasStatic for the class to be initialized and the shared variable to have a reference to a List<string>. Unless you’re considering situations where AppDomains get unloaded, static variables … Read more
With this code: class var items: [AnyObject] { return [AnyObject]() } you are not creating a stored property – instead it’s a computed property, and the worst part is that every time you access to it, a new instance of [AnyObject] is created, so whatever you add to it, it’s lost as soon as its … Read more
In C++03, the easiest way was to use a factory function: std::vector<int> MakeVector() { std::vector v; v.push_back(4); v.push_back(17); v.push_back(20); return v; } std::vector Foo::MyVector = MakeVector(); // can be const if you like “Return value optimisation” should mean that the array is filled in place, and not copied, if that is a concern. Alternatively, you … Read more
In the semi large projects where I usually work (more than 2 million lines of code) I would ban private class functions if I could. The reason being that a private class function is private but yet it’s visible in the header file. This means if I change the signature (or the comment) in anyway … Read more
It defines a pointer-to-function type. The functions return void, and the argument list is unspecified because the question is (currently, but possibly erroneously) tagged C; if it were tagged C++, then the function would take no arguments at all. To make it a function that takes no arguments (in C), you’d use: typedef void (*MCB)(void); … Read more
The O in OO stands for “Object”, not class. Being object-oriented is all about the objects, or the instances (if you prefer) Statics don’t belong to an object, they can’t be inherited, they don’t take part in polymorphism. Simply put, statics aren’t object-oriented. Scala, on the other hand, is object oriented. Far more so than … Read more
A class is allowed to have a static member of the same type. However, a class is incomplete until the end of its definition, and an object cannot be defined with incomplete type. You can declare an object with incomplete type, and define it later where it is complete (outside the class). struct Size { … Read more