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
42,733
questions
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27
views
Assigning my custom class to an object/widget from a .ui file [duplicate]
Writing my 1st code in python, how can I create an instance of a class of my own and assign it to an object/widget from a .ui file?
Something like this:
import sys
from PyQt6.uic import loadUi
from ...
- 29
-1
votes
1
answer
28
views
Why does the custom ArrayAdapter constructor in this example not match the superclass constructor exactly?
I was following a tutorial on creating a custom ArrayAdapter for a ListView in Android. Here is the custom adapter class from the tutorial:
public class NumbersViewAdapter extends ArrayAdapter<...
- 27
0
votes
1
answer
58
views
Provide implementation for an abstract method from an interface
Is it possible to override a method implementation by deriving from an interface which gives a default implementation for that method? If not, how should I restructure my code to avoid explicit method ...
-1
votes
1
answer
41
views
Java Protected Field Access Issue in Subclass
What is the difference between public, protected, package-private and private in Java?
The question's answer cannot answer my question. It's not a duplicate question. I totally know the diagram of ...
- 1,435
0
votes
2
answers
48
views
How to upgrade Java class to extension class?
I have a simple problem. I have a large class:
public class Base {
public Field1Data field1;
public Field2Data field2;
public Field3Data field3;
// many more fields later...
public ...
- 183
0
votes
1
answer
41
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Overriding implementation of a library Component
The problem (Angular 14)
I want to override a function from a library Component (Angular Material) without re-implementing the whole component.
The idea
My thinking is inspired by one of the examples ...
- 47
0
votes
2
answers
62
views
multiple inheritance without defining a class [duplicate]
I'm not sure that's possible, and I'm wondering if that's the way to go, or if there exists a better way of doing that.
I'll create a toy example to expose what I'm looking for.
Suppose I have people ...
- 354
1
vote
1
answer
87
views
Inherited functions returning self reference with derived type
I am trying to create a system where one base class has a bunch of functions, then derived classes can inherit it and add more functions. However, all of these functions return the this keyword and I ...
-1
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0
answers
56
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Compiler misidentifying/unrecognising type [duplicate]
I have the following class with constructor:
command.h:
#include "./robots.h"
enum class CMD { //...... };
class CommandTemplate {
//.....
public:
virtual std::unique_ptr<...
- 1
1
vote
3
answers
81
views
Inheriting Structs in C++
I am working with the LibAV library, converting it from C to C++ (and moving to an object oriented style).
This library has structs to hold data, which need to be created using specific allocation ...
- 51
0
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0
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56
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C++ continue base class bitfield in derived class
I have a base class with a bitfield
enum Enum {
ENUM1,
ENUM2,
...
ENUM8
};
struct Base {
Enum type : 3;
};
I am inheriting a class
struct Derived : public Base {
bool bf1 : 1;
u32 bf2 : 19,...
- 31
2
votes
2
answers
88
views
How to declare a function parameter to accept all derived types of a generic abstract type?
these are base type
[DataContract]
public abstract class InputModelBase<T>where T : InputModelParametersBase
{
[DataMember]
public string Token { get; set; }
[DataMember]
public ...
- 1,055
2
votes
1
answer
48
views
How does __slots__ inheritance work? (My code works and I don't know why)
Here is the example of my implementation:
class FileHandler:
__slots__ = ("_target_path",)
def __init__(self, target_path: Path) -> None:
self._target_path = target_path
...
0
votes
0
answers
24
views
Automapper mapping to derived type based on predicate when base class is not abstract
I need to map a model to a derived class based on a condition, but otherwise map to another class.
for example if I have these classes
class Shape
{
}
class Rectangle : BasePolygon
{
}
class Square :...
- 135
0
votes
1
answer
46
views
DRY - Derived class with static methods
In Unity C#, I have a base class Baker, it's derived from ScriptableObject, and I'm deriving from it CakeBaker, BreadBaker, PieBaker.
ScriptableObjects can only be created statically, using ...
- 191