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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Implement a Shape abstract class
To learn more about OOP, @nhgrif challenged me to implement a Shape abstract class (more details in code remarks below. Here is how I did it. Any and all advice appreciated!
Shape.java
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2answers
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Strategy Game Menus and OOP
Most of my experience is with Objective-C, so I am relatively new to Java inheritance. I understand that there are concepts such as abstract classes and interfaces, but I am still not totally sure ...
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2answers
252 views
Decomposing the animal kingdom
I have implemented a Mammal class hierarchy in Java.
Is it an intelligent approach, with respect to decomposition, locality and procedural abstraction?
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1answer
48 views
A Singleton Base and derived class
I have a base and derived class since I need to have different kinds of concrete classes.
I cannot use the getInstance() function in the base class since I cannot ...
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1answer
41 views
Creating users with different roles using .Net Identity 2.0 within Entity Framework
I am using .Net Identity 2.0 with Entity Framework 6.0. I have a Person class inheriting IdentityUser. I have a ...
2
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1answer
124 views
Dumping fields from Python objects
I am writing a small class that has one method: get_state. It is parameterless and returns a dictionary of all the names in self (look in its dict) that are not ...
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2answers
203 views
Video Store Rental Application
I'm in the middle of developing a video store rental application for a school project but am starting to question whether I'm going about things in the correct manner. Although the application is ...
3
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0answers
45 views
Follow up on CRTP with multi-level hierarchy
I was working on a similar problem to this post, asked a question on the Eigen Mailing List, and Gabriel pointed me to the above post, from which I was able to get my code working again. He further ...
3
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1answer
74 views
Generating a zoo of animals
The pattern I've come up here is for the AnimalGenerator itself, outside of the (abstract) Factory Pattern used within it. The factory classes themselves are not ...
8
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2answers
85 views
Inheriting methods of an immutable type
In my project, I have a type BalanceByBucket that is an immutable type and has a bunch of methods.
I have another class called a ...
3
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1answer
43 views
Emulating class extending
I'm using the following piece of JavaScript to emulate class extending. Is this a valid way to go or does it have some drawbacks which should definitely be fixed?
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3
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1answer
63 views
Seeking proper system for pairing types
My code below ensures that only land animals can be a "representatives" for Land while only ocean animals can be representatives for ...
2
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1answer
219 views
Displaying a list of players and their leagues
My question is mostly directed towards the principles of object-oriented programming.
I have an Android application and one of the activities has a ListView.
In ...
4
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1answer
63 views
Design/reiterate or code reuse for linked list
This is what my class hierarchy looks like. I have an abstract superclass, AbstractLinkedMyList, that contains common operations for both sorted and unsorted linked ...
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0answers
56 views
Possible class redundancy and improper enum usage
I am looking for code correctness and design usage as I think I might be over doing it in the class department.
There are two things I'm mostly concerned with.
The possible redundancy of classes ...
2
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0answers
57 views
Implementing Simple and Fast Inheritance in JavaScript
I have been using the John Resig JavaScript class implementation in my web apps, but the tests shows it is really slow. I really find it useful for the way of extending objects, and the benefits got ...
7
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1answer
198 views
Multiple inheritance with JavaScript with support of calling of super() methods
I have just finished working on a Node.JS module that provides "multiple inheritance that works". I had some really specific requirements:
Works in safe mode
Auto-calling of parent constructors
...
7
votes
1answer
79 views
Polymorphic animals speak their name and make a noise
I'm new to GNU Smalltalk. I'd like to port a script I've written in Ruby, Scala, CoffeeScript, and several others. It's the one I use to try to learn the classic OOP concepts of abstract classes, ...
3
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1answer
45 views
How can I ensure some structure for classes for a plug-in system written in Python?
I have written a toolkit (hwrt) which has a plugin system. One type of plugin is a feature (see this) for many of them.
There are some restrictions of feature ...
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2answers
83 views
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0answers
57 views
Testing with multiple input datasets and expectations
I wanted to make 3 test suites where each would run a test class with a specific input. I figured that in order to do this I could:
Make an abstract test suite with all the variable parts (...
4
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2answers
76 views
Should I create an abstract runnable? I've 4 sub-classes which perform similar work but only 3 of them have identical constructors
I've added the code for an abstract thread class and 2 sub-classes. The structure and job of the threads (sub-classes) is identical except one difference: ONE of ...
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2answers
92 views
Using a CRTP approach for loading OpenGL programs
I wanted to try using CRTP (also new for me) to try making the loading of shared resources implicit. (Specifically I'm using it for loading OpenGl shader programs)
This will also help separate some ...
3
votes
1answer
90 views
Implementing binary output to a file in C++11
I would like to have a class which supports outputting bits into a file. This is what I came up with but I fear there are many poor decisions. Should I inherit from a ...
4
votes
2answers
81 views
Too little in common to use superclass?
Is there something as "they have too little in common to use a superclass"?
In my case, doing iOS programming, in a project, every screen has the same background. So I created a superclass which only ...
4
votes
2answers
108 views
Inserting and displaying books
I'm trying to write a program where you can insert and display some books (without using a database).
For doing this, I use three classes:
Book - is the base ...
8
votes
1answer
548 views
Solar System model: Moving Space Balls
I have a model of the solar system that I'm working on at the moment. Now is the time to start cleaning my code up a little.
Here's what I have so far:
A main 'driver' method:
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2answers
195 views
Overriding base class methods
I would like to know if there is anything wrong I am doing here. I am learning about inheritance.
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2answers
152 views
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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1answer
59 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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2answers
452 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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3answers
446 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
282 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
69 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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3answers
78 views
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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14
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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:
...
2
votes
2answers
72 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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1answer
119 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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2answers
501 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
136 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 ...
2
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0answers
52 views
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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2answers
94 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
101 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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5
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3answers
76 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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0answers
332 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 ...
2
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1answer
53 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 ...
2
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0answers
87 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
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4
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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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3
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2answers
110 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 ...
