One of the four pillars of object-oriented programming (OOP), inheritance establishes a "is-a" relationship between objects. For example, a "Cat" object can be treated in code as any other "Animal" object because a "Cat" is-a "Animal".

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Implementation of subtyping in C [on hold]

I'm trying to figure out a good way to do subtyping in C: statemachine.h ...
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Custom TextBox control: AppendLine

Is there any way to improve this simple addition to the textbox control: appending a new line? ...
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50 views

Object.extends in JS

I built an easy inheritance implementation for JavScript that works similar to other OO languages and wanted some feedback on it. This works perfectly how I'd like it to, but I've read a lot of ...
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285 views

Simple PHP inheritance using an abstract class

I have created simple class inheritance of an abstract class Pet which is basically the skeleton of all other children classes. ...
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422 views

DRYing out some Java code and tests

I am writing some tests that all follow the same pattern, I feel like repeating myself over and over again, how can I reduce the repetition? The (almost) repeating part is in constructor and the class ...
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2answers
128 views

Layer Stack class to practice std::shared_ptr

The following three source files is to define and test a class StackLayer. While it was written in a need for scalable layer-based architecture design, it was also ...
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1answer
64 views

Duplicate code in similar classes where I cannot add more inheritance

I'm building a .NET Linq-esc query builder for my application and I'm wondering about my implementation and code structure when it comes a few classes. Basically I'm creating a query builder for SQL, ...
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Working with Classes (inheriting), @ properties and Initialization

I'm working on this Objective C programming assignment I found online. I'm not sure if I have met all the requirements, especially part C. Any help or suggestion will be appreciated. Part 6 ...
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4answers
2k views

Reusability vs simplicity in a small game with a set of interfaces

I have a small game I'm working on with a set of interfaces: IHavePosition: ...
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2answers
64 views

Generate the Norwegian equivalent to social security numbers - follow-up

First of, here is my previous post. That should explain a fair bit. The reason I'm posting one more time, is I have changed a lot. Using more classes, let them do all the work, and the overall ...
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104 views

Simple JavaScript inheritance

I'd like to know what you think about my implementation of inheritance. It's pretty small and intuitive I think, but I don't know if there are any drawbacks. I really want to keep it as simple as ...
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135 views

Encapsulated text-based RPG using a randomized combat system

For my rags-to-riches submission, I've decided to improve this code: Text-based RPG game using classes However, I've decided to start off with something different. The original code is more ...
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1answer
123 views

Many interfaces and lots of inheritance vs few interfaces and less inheritance? [closed]

I have a Visual Studio Solution which has a bunch of Projects in it. One of these projects is called "Services" and is basically the junction point between all remaining projects. When I built it ...
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Namespace handling on nodejs and inheritance managing

It should solve the following issues: Handle namespaces; Be a class factory from Pojos Be a object factory Create a class with inheritance capabilities from a POJO using john resig inheritance ...
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74 views

When should I actually derive from my interface?

Context: I am working on an XNA project, and since procedural generation is likely to be used, I wanted to eventually create a helper class to work with data to facilitate that. Design Goal: ...
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1answer
44 views

Using a decorator to apply an inherited method to all child objects of the inherited type

I wanted to share this and get some feedback. My goal was to be able to have an object with methods: ...
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3answers
63 views

Cons of declaring derived class type member in another derived class (both of which share the same base class)

I'd like some input on the way I've structured some things in a side-project I'm working on. I declare an abstract class, CelestialObj, which will contain the ...
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94 views

Static Multilevel Inheritance with CRTP (Fast Intrusive Pointers)

I wanted to have a way to be able to static_cast to the proper derived type pointer of a base class to simulate a virtual call. Here the virtual call is for a ...
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1answer
50 views

JavaScript mixins, extending and super methods

I've read a lot of stuff about mixins, inheritance and such, and in the end I came up with this solution for extending a class with multiple mixins. I haven't seen this anywhere else... Is this a ...
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0answers
68 views

Implement.js JavaScript module pattern

I have been playing with a new JavaScript module pattern to see what I can come up with. I think it's quite powerful and wanted to know if it is something people would find useful? I'm looking for ...
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3answers
81 views

Call method of specific parent class

This question is related to this topic. Context: ...
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1answer
102 views

Merging with different modules

We have an action merge for two projects. In the projects we have different modules like Feed, Files, Post etc.... ...
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96 views

Is my code overdesigned? Does it rely too heavily on interfaces?

Context: I am using XNA to create a simple game / learning project. Problem: I have three interfaces, each with a different purpose in mind. However, the way I use them, as well as their ...
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1answer
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Better solution than inheritance with “busy” __init__

The goal was to create a node object with input and output ports for a data flow system. I approached the problem using inheritance as I couldn't think in an easy way to do it with composition. My ...
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4answers
724 views

Basic Postfix Calculator in Java

I recently posted some sample code that I was providing students with and got great feedback so figured I post another one of the examples I will be providing students with. (See Simple Example of an ...
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5answers
156 views

Initializing JTree

I have a class called Piece, and many many subclasses of Piece. I want to add an instance of every single subclass of ...
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44 views

Having children call parent's public events with data generated from a protected event

I don't know that my title describes the code I want reviewed. Hopefully the code is explanatory. I have an abstract parent class with two children. The parent listens to some hardware notifications ...
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2answers
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How to write factory classes or functions in JavaScript? [closed]

I find that in Javascript there are many methods of creating an object so what would be the appropriate approach for constructing an object and why. ...
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1answer
68 views

Can this architecture of base + derived classes be coded more efficient? [closed]

I've got some architecture in my code similar to this. It is about the Construct method in the base class in the example below. This method contains the logic for constructing a building, which is the ...
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1answer
36 views

Simple inheritance with functions in subclasses [closed]

It seems like there are many ways implementing inheritance in JavaScript. Which version do you prefer or would you suggest another solution? The code should run in IE8+ so my first version would not ...
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41 views

Forcing base class functions to be used from the base class [closed]

The answer to this question is probably "W-what!? What the !@#$-- Stop!! That's a terrible idea!", but I would like to hear your thoughts... I have two classes and one inherits from the other. ...
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3answers
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Raising error if method not overridden by sub-class

Background I have a base (only 2 classes inherit from it, and only from it) abstract (meaning I don't want it to be used directly) class that implements some common functionality. Some of it depends ...
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1answer
143 views

DataLayer Interfaces Genericized

I have some concerns on my refactoring for the data layer in my current Project. Just for a small info, I am currently building a CRM as "training JEE application". But enough of talk, let's talk ...
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2answers
300 views

Class for printing class hierarchy as text

I'm coding a little class hierarchy printing tool for easy show hierarchies of java classes. This is my current code: ...
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1answer
209 views

Prototype inheritance with Knockout observables

I'm trying to write a JavaScript library to allow inheritance with knockout. The fundamental problem when implementing inheritance in Knockout is that each Knockout observable is its own instance, ...
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3answers
88 views

Color vision checkup

I have this old project I wrote years ago and it's all classes and methods all over the place. I am trying to learn/understand how I can apply a more OOP principle. It is very large and can't paste ...
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2answers
101 views

Using properties efficiently in inheritance

I have a class called Mailer which has some properties like this ...
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1answer
48 views

dnaof() - inheritance made easy, my own make inheritance tool

https://github.com/exebook/dnaof I created this simple inheritance tool for JavaScript, could any one with deep knowledge in JavaScript prototyped inheritance review it? Here is the library itself: ...
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Modelling a Call Center

This is the requirement I have (from the book: Cracking the Coding Interview) Imagine you have a call center with three levels of employees: fresher, technical lead (TL), and product manager (PM). ...
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669 views

Fluent interface and polymorphism

EDIT: For further improvements see the related question: Variadic templates and pointers to member functions to achieve a named-parameters interface in C++ I would like to improve the interfaces of ...
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1answer
98 views

Improving XNA's default project template

I hope this isn't getting annoying, but I've asked a lot of questions about improving my game lately: How can I improve my game project design? Using the observer pattern with collision detection Is ...
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0answers
38 views

Inheritance and setting up for an API request

I am setting up a class to be used for an API request (with JavaScriptSerializer). I am using it to send a complaint to their ticketing systems. For example I ...
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2answers
77 views

Avoiding casts in abstract types

I asked this question on Stack Overflow and in the comments someone had this to say. In a proper design, you should almost never have to do a dynamic_cast, even if it's hidden inside some nice ...
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1answer
97 views

A variant of state pattern + C++ template FSM without state creation/destruction penalty

This is a variant of the solution posted here, without state creation/destruction penalty. Note that my comment in the original question about the simplification provided by C++11's inherited ...
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1answer
45 views

Javascript subclasses instantiating superclass (check code)

I have a test which looks like this: create a base class Human Human class needs to have a method Talk the Human class needs to have to descendant class Man and Woman both Man and Woman should have ...
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2answers
144 views

Classical inheritance in JavaScript

I've been playing around with inheritance in JavaScript and I'm wondering if there are any drawbacks to this method which tries to emulate classical inheritance from C-based languages. ...
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1answer
778 views

Case class design in Scala

In the Java world while writing the data access layer (for CRUD) and the model layer, I have done something like this: ...
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1answer
141 views

Moving method from derived class to base

I've some classes (Derived1, Derived2, etc.) derived from class Base. All of derived classes ...
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3answers
124 views

Object inheritance

I have written some example code to test object inheritance, but I'm not sure if it's really the best way for an object to inherit another's functions (like Java's ...
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3answers
336 views

Why would I want to always have to explicitly call a “base” method if I just want to use base functionality?

I recently worked with an architect who structured his base class like this: ...