In this post, we will see how to resolve std::unique_ptr from virtual classes Question: How to use std::unique_ptr with polymorphism idiom? For example: How to initialize unique_ptr from any child of Abstract ? Best Answer: When instantiating an object, the ...
In this post, we will see how to resolve Accessing abstract class properties from extended class Question: Having this snippet: How can i access id property? print(SubClass.id); results in error: “line 3 • The getter ‘id’ isn’t defined for the ...
In this post, we will see how to resolve Abstract class values not registering in ‘extended’ class Question: I wrote Java code using abstraction to calculate federal and state income tax from a salary. The code is below. When I ...
In this post, we will see how to resolve Kotlin implement abstract properties correctly Question: For example java code I need some necessary property that defined in constructor. And then i will do something with that property. What is the ...
In this post, we will see how to resolve create logic in each method that derived from abstract class Question: I test to create a abstract class that send send email in 2 different ways, either by POP or Office ...
In this post, we will see how to resolve How to define Iterators for an abstract class in C++ Question: I’m working on a C++ project where I have an abstract class called Aggregate, which represents a container for another ...
Question: I wish to have a pure virtual function, but I need to guarantee that all implementations of it include some bookkeeping. Here is a workaround that achieves what I want, but it is clunky. Is there a better approach? ...
Question: When I compile my code, I get: alongside several other errors of a similar type. I’m not sure if the problem has to do with the abstract class or the forward declaration of the class. I have tried troubleshooting ...
Question: I’m originally a Java programmer who now works with Objective-C. I’d like to create an abstract class, but that doesn’t appear to be possible in Objective-C. Is this possible? If not, how close to an abstract class can I ...
Question: This may be a generic OOP question. I wanted to do a generic comparison between an interface and an abstract class on the basis of their usage. When would one want to use an interface and when would one ...