Questions tagged [polymorphism]
In computer science, polymorphism is a programming language feature that allows values of different data types to be handled in a uniform manner.
polymorphism
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What is polymorphism in JavaScript?
I have read some articles on polymorphism. But I think I could not quite grasp the meaning of its importance. Most of the articles don't say why it is important and how I can achieve polymorphic ...
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The left-hand side of an 'instanceof' expression must be of type 'any', an object type or a type parameter
I've been playing around with TypeScript (I'm still learning) and writing up a few test scenarios to better understand programming fundamentals.
export class Base {
readonly id: string;
...
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answers
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Polymorphism and overloading with static methods in C#
I have been trying to generate a Factory supposed to return a different object of a common interface (say Item) according to the input parameter (I call it a context) of the function getItem(A context)...
- 159
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Cakephp PolymorphicBehavior errors
I am using a Feedback Plugin from this link to add comments on any model in my application using the PolymorphicBehavior. I am geeting 2 errors on my app that says
Strict (2048): Declaration of ...
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Polymorphism in Java Spring [closed]
I develop an application in Java Spring. I have an abstract superclass called AbstractPuzzle and I have its children called Wordle and Riddle(I have JOINED type of inheritance).
I get an ...
- 1
9
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answer
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Late Binding vs. Polymorphism - what is the difference?
I've seen both used interchangebly but do they really mean the same? From my understanding, Polymorphism stretches the fact that you could exchange an instance of a class by an instance of a subclass, ...
1
vote
0
answers
29
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Complex multi level EF Core 8 inheritance issue
Please consider the following:
DB Context:
// DbContext.cs
public partial class OperationsDbContext : DbContext
{
public virtual DbSet<AnimalBase> AnimalBases { get; set; }
public virtual ...
- 63
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votes
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answers
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OpenAPI Swagger with kotlin inheritence
How to deal with inheritence with Kotlin for Swagger targetted objects?
Just wondering if there is a way to do something like
@Schema(description = "Child.")
class Child(
aName: String
):...
- 4,963
2
votes
0
answers
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Using Assumed Rank with Unlimited Polymorphic Issues
There must be something I'm misunderstanding.
I'm attempting to use an assumed rank unlimited polymorphic variable to store data. When I do this I either get access violations or corrupted data. I ...
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0
votes
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answers
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Cereal archive called from DLL cause polymorphism not to work
I am a newbie to cereal and lately I ran into an odd issue,
I have my serialization code inside an external DLL, in the code I use cereal's polymorphism functionality, when trying to invoke the ...
1
vote
1
answer
695
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Issue correctly using CEREAL_REGISTER_DYNAMIC_INIT in C++ Cereal library
I've moved to using a lib file and wanted to make use of CEREAL_REGISTER_DYNAMIC_INIT properly. I don't know if I need to use this, but I noticed an issue with one of my cerealization types not being ...
- 747k
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create object type based on base type member function return value
I am implementing a loadbalancer that should choose balancing strategy based on some logic:
class LoadBalancer{
public:
bool get_backend_cpu_info(){// some complicate logic involve member ...
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37
votes
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answers
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Reintroducing functions in Delphi
What was the motivation for having the reintroduce keyword in the Delphi Programming Language?
If you have a child class that contains a function with the same name as a virtual function in the parent ...
- 19
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votes
0
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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<...
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templates may not be ‘virtual’
Given the code below, the compiler is showing a message pointing that error: templates may not be ‘virtual’. Does anyone have a suggestion on how to solve the bug?
template < class FOO_TYPE>
...
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