abstract-class

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ABC for String?

I recently discovered abstract base classes (ABCs) in collections and like their clear, systematic approach and Mixins. Now I also want to create customs strings (*), but I couldn\'t find 开发者_开发问[详细]

2023-03-30 14:28 分类：问答
Ways to achieve effective Java traits?

Please let me know if this is inappropriate as formulated (in particular whether Programmers开发者_如何学C.SE or something would be better for the question.)[详细]

2023-03-29 17:33 分类：问答
How to listen an abstract method?

In my abstract class can I listen an abstract method and开发者_C百科 fire an event whenever that method is called? If yes how?Abstract or no, you\'re looking for an Inversion of Control (IoC) framewor[详细]

2023-03-29 15:01 分类：问答
Can a Groovy closure extend an abstract class

I have an abstract Java class that needs to have one method onMessage to be implemented. I know that a closure can easily implement a Java interface using the as keyword, but how can it extend an abst[详细]

2023-03-29 04:58 分类：问答
Is an interface and an abstract class with just virtual abstract methods the same thing?

If I have a project that contains similar classes and some may use the same implementation, but in most cases they implement their own way of handling the methods defined in an interface or abstract c[详细]

2023-03-28 05:16 分类：问答
Accessing functions of a class that implement an Interface that are not part of the Interface

I am writing an application in c++. I have an interface defined with various functions: class ITest { public:[详细]

2023-03-25 23:11 分类：问答
Get Concrete Class name from Abstract Class

In Java, inside an abstract class can I get the instance of the 开发者_如何学Pythonconcrete class that extends it?Yes, you can do this by calling this.getClass(). This will give you the Class instance[详细]

2023-03-25 15:41 分类：问答
C++, virtual inheritance, strange abstract class + clone problem

Sorry for the larger amount of the source code. There three abstract classes P, L, PL. The third class PL is derived from classes P and L using the virtual inheritance:[详细]

2023-03-25 03:59 分类：问答
Spring 3 Service Dao layers with abstract class question

I am trying to implement a generic abstract class in my service layer.I am already using a simliar pattern in my dao layer and it works fine.I found a working example in the Spring in Practice v8 eboo[详细]

2023-03-24 15:19 分类：问答
boost::lambda expression fails to compile because of instantiation of abstract template arg. Any explanation and/or work arounds?

I\'m in the process of learning boost::lambda and I\'ve managed to create a situation that I can\'t resolve with what I know so far.[详细]

2023-03-23 18:13 分类：问答