62,340 questions
-3
votes
0
answers
31
views
php inheritance abstract class property [closed]
I have a question about inheritance in php 8.3.
I have an abstract class with a property, variable or what ever it must be called.
I then try to set this property/variable from a function in the ...
2
votes
2
answers
45
views
In dart/flutter, what's the best way for a wrapper to have the same default values for (some of) its parameters as its child?
Mainly facing this in wrapper widgets that pass through parameters to the widget that they wrap. The child declares default values, but for the wrapper to also have the same default values I end up ...
- 67
-1
votes
1
answer
54
views
Python updating a subclass attribute [closed]
I'm learning to work with classes in Python and I can't understand why my subclass attribute is not being overwritten.
If I do char.info.name = "SOME" then everything works and the name ...
- 1
-1
votes
0
answers
49
views
Runtime polymorphism design, with derived class objects as members of another class [closed]
I'd like to provide users of my C++ (17) library with abstract base classes, for example,
class Base
{
public:
virtual void mandatory_method() = 0;
};
where users are encouraged to create their ...
- 133
2
votes
0
answers
66
views
Get list of local variables , global variables and call parameters used by function in QT creator C++ project [closed]
I am using QT creator as ide for qt C++ project. I want to know all about inbuilt tools provided by qt creator that can help me in getting the following details:
global variables used by a function
...
- 8,332
2
votes
2
answers
75
views
How is a Kotlin getter/setter tied to correct attribute within a class? What makes the connection?
From the Kotlin-documentation:
class Rectangle(val width: Int, val height: Int) {
val area: Int
get() = this.width * this.height
}
What I don't understand: How does the "get" ...
- 5,858
-5
votes
0
answers
80
views
How are initialization and assignment fundamentally different? [duplicate]
take the following classes for example:
class Test
{
public:
int a=1;// no error
};
class Test
{
public:
int a;
a=1; // error
};
Here the second case gives error. After a few ...
- 19
16
votes
1
answer
603
views
Why does R behave differently for auto-printed objects?
I have encountered two instances where it seems that R treats obj and print(obj) differently. I would like to know more about the nature of this difference.
First instance
I can run
trace("print....
- 498
0
votes
1
answer
100
views
Does the compiler generate the move operations (not default) in case of a default destructor? [duplicate]
A relatively same question is asked before, but the code snippet is different, which I believe makes this question unique.
Does the compiler generate the move operations in the following scenario?
...
- 63
0
votes
2
answers
89
views
Is it possible to create an equals override for an untyped class and it's typed counterpart?
I have two classes, non-generic BindingFilter and generic BindingFilter<T>:
public class BindingFilter
{
public object Value { get; set; }
public string Member { get; set; }
...
- 3,963
0
votes
2
answers
57
views
Python Multiprocessing Pool Queue Works in Functional Code but not in OOP
I am learning multiprocessing in Python and am trying to incorporate a worker pool for managing downloads. I have deduced my queue issue down to something with OOP, but I don't know what it is. The ...
1
vote
1
answer
69
views
How to properly reuse heavy calculations performed in the Parent class within the Child class?
Suppose I have a Parent class in Java:
public class Parent {
protected int value;
public Parent() {
value = performHeavyCalculations();
}
private int performHeavyCalculations(...
- 51
0
votes
1
answer
80
views
How to dispose IDisposable child when disposing parent [duplicate]
I have an IDisposable object, a Winform, with another IDisposable object as a property. Would it be a good idea to add a reference to the parent object when instantiating the child object and then ...
-5
votes
0
answers
63
views
Extern causing hang issue on Linux [duplicate]
I have a project that I am developing and observing a crash when program exits.
util.cxx
#include <iostream>
#include <map>
#include <string>
namespace A
{
namespace B
{
...
2
votes
1
answer
49
views
Exiting Fullscreen of video leads to status bar hidden issue i am using chewie controller and video controller
I am using chewie and video controller in my app , on the video Fullscreen exit the status bar hides when i exit from full screen mode for full app the status bar issue happens then.
My code snippet:...
