The best way to do function overloading with parameters is not to check the argument length or the types; checking the types will just make your code slow and you have the fun of Arrays, nulls, Objects, etc. What most developers do is tack on an object as the last argument to their methods. This … Read more
Static methods can not be overridden in the exact sense of the word, but they can hide parent static methods In practice it means that the compiler will decide which method to execute at the compile time, and not at the runtime, as it does with overridden instance methods. For a neat example have a … Read more
TypeScript allows you to declare overloads but you can only have one implementation and that implementation must have a signature that is compatible with all overloads. In your example, this can easily be done with an optional parameter as in, or two overloads with a more general constructor as in, See in Playground
The compiler doesn’t know that rhs stands for “right hand side”, and in fact the name of that variable can be anything you like. The compiler “knows” how to format this because the syntax of operator= requires it to be this way. The language defines the usage of this operator to take the form: The code above calls A::operator=(const &other) against … Read more
I know that Python does not support method overloading, but I’ve run into a problem that I can’t seem to solve in a nice Pythonic way. I am making a game where a character needs to shoot a variety of bullets, but how do I write different functions for creating these bullets? For example suppose … Read more
The clearest way to express polymorphism is via an abstract base class (or interface) This class is abstract because the goPee() method is not definable for Humans. It is only definable for the subclasses Male and Female. Also, Human is an abstract concept — You cannot create a human that is neither Male nor Female. It’s got … Read more
Go does not have optional parameters nor does it support method overloading: Method dispatch is simplified if it doesn’t need to do type matching as well. Experience with other languages told us that having a variety of methods with the same name but different signatures was occasionally useful but that it could also be confusing and … Read more
No, you can’t use multiple arguments. Python executes each + operator separately, the two + operators are distinct expressions. For your example, object + 1 + 2 really is (object + 1) + 2. If (object + 1) produces an object that has an __add__ method, then Python will call that method for the second operator. You could, for example, return another instance of A here:
The problem is that you declared operator>> and operator<< as non-member functions, but defined as a member function. This should fix that problem (but open another set of problems). So instead of implement as : Also, take a note that you declared functions as : but defined as (therefore you changed the signature) : Proper way is to declare … Read more
You’ve not included <string> header file in stock.h header file, even though you’re using std::string in it. Maybe that is causing this error message (if that is the case, then I would say its really a bad message). Another problem is that in Stock class definition, you’ve written this: which is wrong. Remove Stock:: from it, and make it like this: Stock:: is required when defining … Read more