All Questions
Tagged with inheritance subclass
796
questions
0
votes
1
answer
74
views
Strange inheritance behavior with base class
I hope someone can help me since can't quite understand how it is possible that the following code can work.
I have a base class with some classes that derive from it.
Each derived class has its own ...
-3
votes
3
answers
86
views
Why can’t a superclass call a subclass’s methods?
I’m a computer science teacher at a high school, and I’m teaching polymorphism in Java. My students asked me this question, and I didn’t have a good answer.
Let’s say I have an Employee class. Also, I ...
0
votes
1
answer
72
views
Enforcing type safety between concrete subclasses of an abstract base class
I'm facing a type safety issue in my Python project involving an abstract base class (AbstractClass) and its concrete subclasses (ConcreteClassA and ConcreteClassB). Each concrete class implements ...
- 153
0
votes
2
answers
38
views
Python sub-class that is inherited by multiple classes
Currently I have a class-definition that looks something like this:
class cls_A:
def __init__(self, a1, a2, a3):
x = a1 + a2
y = a2 + a3
self.__plot__(self)
# some ...
- 173
0
votes
0
answers
44
views
How do I add value to my Method call from my Sub class to Main?
The string value seems to appear yet I can not add a value to my calculations in the fulltime and part time.
This is the Main class for my inheritance
import java.util.Scanner;
public class ...
- 1
0
votes
0
answers
32
views
Java subclass vs superclass inherited variables clarification [duplicate]
ABOUT ME:
I am learning Java because I want to become a software developer someday and I came across the topic of subclasses and their ability to inherit from superclasses on tutorialspoint.com.
where ...
1
vote
1
answer
85
views
Jasmine access protected property
I'm now to angular and have just completed my first implementation of angular inheritance.
I need to write a test case for the subclass where I cam assign value to protected variable (coming from base ...
0
votes
1
answer
98
views
How can I programmatically decide what class to create an object as?
I want to write code to communicate with encoders of different positioning styles (absolute vs. relative). The idea I have is to create a base class that has things common to all encoders. Then there ...
- 15
1
vote
2
answers
256
views
How can I "augment" a JS class with methods from another class, without extending it?
I'm writing an app that manages playlists.
Basically, my actual logic looks like
//define playlist props
class Playlist{
public tracks = [];
}
class ApiPlaylist extends Playlist{
//fill ...
- 1,865
0
votes
1
answer
52
views
Can we access the members of sub class using the refrenced variable of super class which holds the subclass object? [duplicate]
If not,then for the below program, how is the multiplication(method) of subclass is accessed Since I used the refrence variable of superclass Calculation which holds object of subclass My_Calculation.
...
0
votes
2
answers
69
views
C++: overloading method with parameters of multiple subclasses
I am making chess, it's a great way to practice basic OOP. There's an abstract base class Piece with subclasses like King, Rook, Pawn, etc. as well as a Board class.
Is there a way to create multiple ...
-2
votes
1
answer
67
views
Subclass declares "no appropriate default constructor available" [closed]
I made a class with a default constructor and a subclass. When I try to create an instance of the subclass using a default constructor, I get the errors
C2512 (no appropriate default constructor ...
- 41
0
votes
1
answer
40
views
How do I solve this missing attribute error in this subclass IceCreamStand in the superclass Restaurant in python?
I am in the middle of learning how to create subclasses to a superclass in python. I have created an IceCreamStand subclass to the superclass Restaurant and then gave the subclass a specific attribute....
- 9
0
votes
1
answer
63
views
How can I set values from the constructor of the parent class?
I need to create a generic class that is able to dynamically set values based on the properties of the child class. Here are examples:
export class EnderecoMobile extends ModelCore{
id: string = ''
...
0
votes
3
answers
85
views
How to manage the Exception thrown from some particular subclasses in Java?
This confusion comes from when I finish my homework. I have tried to give a solution (at the end of this question) but I think it might be a bit fair-fetched. So I was wondering if there's a more ...
- 11