First of all there are different mechanisms involved here: Overriding and Shadowing (also called hiding). 1) Static methods cannot be overriden as they are attached to the class they are defined in. However, you can shadow/hide a static method as you are doing with your Parent/Child class. This means, the method gets replaced in the … Read more
You cannot override variables in C#, but you can override properties: public class Item { public virtual string Name {get; protected set;} } public class Subitem : Item { public override string Name {get; protected set;} } Another approach would be to change the value in the subclass, like this: public class Item { public … Read more
Yep, you are misunderstanding a little. The method of the same name on the derived class will hide the parent method in this case. You would imagine that if this weren’t the case, trying to create a method with the same name as a base class non-virtual method should throw an error. It is allowed … Read more
Calling virtual functions from a constructor or destructor is dangerous and should be avoided whenever possible. All C++ implementations should call the version of the function defined at the level of the hierarchy in the current constructor and no further. The C++ FAQ Lite covers this in section 23.7 in pretty good detail. I suggest … Read more
When you can use the final specifier for virtual methods (introduced with C++11), you can do it. Let me quote my favorite doc site: When used in a virtual function declaration, final specifies that the function may not be overridden by derived classes. Adapted to your example that’d be like: class Base { public: virtual … Read more
Does this answer your question? The second import does the trick. Mod_1.py def test_function(): print “Test Function — Mod 1” Mod_2.py def test_function(): print “Test Function — Mod 2” Test.py #!/usr/bin/python import sys import Mod_1 Mod_1.test_function() del sys.modules[‘Mod_1’] sys.modules[‘Mod_1’] = __import__(‘Mod_2’) import Mod_1 Mod_1.test_function()
The solution I found was to create a new function in the subclass that has the same name as the inherited function. In this case push. Then inside the overriding function the inherited function is called via the super keyword. class newArray extends Array{ push(value) { //execute any logic require before pushing value onto array … Read more
You can’t call the super method in other objects – that would violate encapsulation. The whole point is that the object controls what its overridden methods do. For instance, you might override a collection’s add method to throw an exception in certain circumstances, so it could ensure only “valid” items got added to the collection. … Read more
You can override (unset) max-width with .foo{ max-width:none; } … to clear any inherited max-width.
That’s an anonymous inner class. In the example above instead of creating a private class that extends Button we create an subclass of Button and provide the implementation of the overridden method in line with the rest of the code. As this new class is created on the fly it has no name, hence anonymous. … Read more