Questions tagged [inheritance]
Inheritance is the system in object oriented programming that allows objects to support operations defined by anterior types without having to provide their own definition. It is the major vector for polymorphism in object-oriented programming.
inheritance
42,722
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How to provide a 'blanket implementation' of a static method for the derived class?
Consider this:
struct Base {
static Base make() { return {}; }
};
struct Derived {
// I _would_ want to have a `static Derived make()` automagically here
};
One approach to the stated problem is
...
- 480
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0
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12
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Lua: Assistance Needed in Using Inheritance in conjunction with case-insensitive metatables/metamethods? Doable?
I've been trying to wrap my head around utilizing inheritance with Lua (https://www.lua.org/pil/16.2.html and Case insensitive array in Lua as references) but also integrating a case-insensitive ...
0
votes
1
answer
30
views
Composable inheritance... how to add padding to inherited content?
I want to do some kind of Composable Inheritance. I need a parent composable with a Scaffold, and the children must have the inner content to the scaffold. How can I apply the innerPadding to the ...
- 36.9k
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Inheritance of C# functions and using reusability
I'm drawing a complete blank on what to actually call what I want to do (hence the difficulty I am having in trying to research it). But what I do have is this:
public interface IShapes
{
public ...
- 11
2
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1
answer
72
views
How to return smart pointers and covariance in C++
I am following this tutorial to understand how to return smart pointers and covariance in C++.
#include <memory>
#include <iostream>
class cloneable
{
public:
virtual ~...
- 7,650
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0
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20
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Need to extract a method to use in equals implementation with Hibernate DTO's
I am updating a Java project and had to add an equals() implementation 3 java DTO files (call them Child1, Child2 and Child3) which all extend the DTO Parent class. IntelliJ generated the following ...
- 923
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1
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91
views
Assign base object without changing inherited ones?
How valid is it to assign a new object to a base one, without changing the inherited ones?
The example below works as expected, but is it by chance?
This example is simple, but is there any situation ...
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54
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When calling an inherited method from a derived class it tries to use the uninitialised fields of the base class [closed]
I have two classes. One called Agent, and the other called Player. Agent is the base class and Player is the derived class.
When calling the function SetHand() from the derived Player class, I run ...
0
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0
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14
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Declaring an interface property as a derived type [duplicate]
Currently I have a series of services/repos that are allowing a generic of a custom type. I want to add a generic list to that interface such that when a class inherits the interface it can apply a ...
- 71
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invalid covariant return type for [duplicate]
Consider the following example, which is some part of the bigger codebase, in the getInstance() if I dont return a pointer to the derived class, i.e., just void or int or a different type, the ...
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Does a socket instantiated in a parent class belong to its child class?
I'm making a messaging service in java where I'm using sockets and object input/output streams. I wanted to make this as object oriented as I can (to learn OOP) so for the client side I'm making an ...
0
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1
answer
53
views
What are the differences between using mutiple or'ed typehints vs abc and an inheritance hierachy in Python?
Python is a dynamic language. This means that types are dynamic at runtime and Python makes use of the concept of Ducktyping.
What this means is that for any object x was can do
x.some_function()
x....
1
vote
1
answer
42
views
Inherit override-equivalent as different methods
Several methods from interface, super class or new method are override equivalent. I need to make different realization for each. Example:
public interface A {
int f();
}
public interface B {
...
- 15
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0
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29
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how to use a foreingkey field in a Multi-table inheritance?
Currently the code is working for me, however in admin panel it is not displaying the information in the fields. I assumed that the information that had been entered in the parent table would be seen ...
- 11
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45
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"Error creating form in Unit...fmx: FMX datamodules not supported." when inherit from TDataModule descendant class
I have a problem (with sample project).
I have a TDataModule derived class to which I have added some properties and methods.
I wanted to make sure that it was possible to create a new instance of ...
