This is because of the way Python resolves names with the .. When you write self.list the Python runtime tries to resolve the list name first by looking for it in the instance object, and if it is not found there, then in the class instance. Let’s look into it step by step self.list.append(1) Is … Read more
Yes, there is: var genericListType = typeof(List<>); var specificListType = genericListType.MakeGenericType(typeof(double)); var list = Activator.CreateInstance(specificListType);
Classes have a “class body” that is a constructor. If you use an internal constructor() function, that function would be the same class body as well, and would be what is called when the class is called, hence a class is always a constructor. Constructors requires the use of the new operator to create a … Read more
A class is a blueprint which you use to create objects. An object is an instance of a class – it’s a concrete ‘thing’ that you made using a specific class. So, ‘object’ and ‘instance’ are the same thing, but the word ‘instance’ indicates the relationship of an object to its class. This is easy … Read more
It’s called a factory and it looks something like: class Factory { Product create(int n); // … } class Product { // … } class Prod1 : public Product { // … } int main() { Factory factory = Factory(); Product prod[10] = factory.create(10); // … with create simply returning a Product object of some … Read more