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".
0
votes
0answers
41 views
Class design for multiple interfaces of the same context [closed]
So, there is a database table which store multiple account access information.
...
3
votes
1answer
52 views
Map object types using custom converter
I'm trying to design a mapper that will convert one object type to another shown in the diagram below:
The object has structure as follows (it's not a JSON):
...
0
votes
4answers
103 views
Multilingual command handler using inheritance
My problem is that you have a lot of ifconditions to be checked and inside that if condition you have multiple lines of code. I ...
-2
votes
1answer
47 views
Is it ok to change implementation of parent function with child data?
I was wondering is it OK to change implementation of parent class with child class data. I have situation of creating a child class (form) which extends the parent class (other form with same elements)...
-1
votes
1answer
42 views
Swift inheritance versus composition
Say I'm using Parse Server and utilising the PFObject class from the iOS SDK. Say I want to have a Chat class.
To use inheritance code (design 1):
...
3
votes
1answer
36 views
Emulating super() in Python 3.x using Python 2.7
Depending on the name of the first argument, self.__sup or cls.__sup behaves like super() in ...
1
vote
0answers
40 views
AWS Redshift wrapper class that automates similar types of loads from S3
I have a AWS Redshift wrapper class that automates similar types of loads from S3 for me, and I have recently adapted it to work for Spark jobs, which don't require a manifest, and instead need a ...
3
votes
1answer
60 views
Extending functionality of org.springframework.batch.item.file.transform.DefaultFieldSet
I would like to be able to set token values (defaultFieldSet.tokens) and names (defaultFieldSet.names) on ...
4
votes
2answers
110 views
Spell and cooldown system for an Unity game
So I have doubts about my code and if it is any good. I have a parent class Spell:
...
1
vote
0answers
57 views
Refactoring ValidationContext from inheritance into decorator
In one of my questions I used a ValidationContext class that looked like this:
...
2
votes
1answer
124 views
Pizza Delivery System
I have made this code as my summers vacation project in Turbo C++ (I know its old and outdated, but that's what they teach us in our school).
The code allows users to order different pizzas and even ...
0
votes
1answer
118 views
Document (PDF, TXT, DOCX) to text classes
I wrote some classes to convert some documents (PDF, DOC, DOCX and TXT) to only text so that it can be stored in a search engine.
Here's how I use those classes :
...
2
votes
3answers
122 views
Code Smell in Unit Testing Serialized Classes
I can feel that something is wrong with my code. Here's an excerpt where I think the code smell is...
...
0
votes
0answers
24 views
Class property holds data from database
I have a class, it has two properties:
var fruitsPackId: Int
var fruitsPackContent: Array<Fruit>?
Once the class is ...
2
votes
1answer
68 views
2
votes
1answer
23 views
Draggable toolbar header class, inheriting from a draggable parent class
I have written a draggable parent class using a module pattern:
...
2
votes
1answer
88 views
Parsing a string containing arithmetic operations in prefix notation
This is a piece from the complete program.
What it does is parses mathematical expressions of the form (+(*3,x),5) to 3*x + 5 ...
1
vote
1answer
50 views
JavaScript inheritance with super calls and mixins
I needed JavaScript inheritance that offered calling of overridden methods (super calls).
Furthermore I needed a possibiliy to add behaviour to instances (mixins).
Mixins should not only be full ...
2
votes
0answers
32 views
Idiomatic abstract inheritance with Go
I am currently discovering Golang, and I try to implement some random variable generation functions similar to R functions.
To avoid code repetition, I'd like to use inheritance, which is quite ...
1
vote
2answers
51 views
Class inheritance testing
I'm just messing around with class inheritance. I originally had a separate goal in mind but I ended up here, and my new goal was to have a parent that was completely ignorant of it's self, i.e. no ...
0
votes
2answers
112 views
File processor for text and HTML
I recently took a test. One of the questions was to find problems in the following code and suggest refactoring which can provide adding new formats of data:
...
6
votes
0answers
128 views
Recorder for keyboard and mouse events
I'm building an event recorder. So far the code looks clean, but I feel like I'm missing something that can make this code even better.
Is composition a better solution? If yes, how can I do it ...
3
votes
0answers
83 views
Shape inheritance hierarchy
I have managed to build an inheritance hierarchy for shape class object and I am wondering if there is a better solution to combine the following 2 hierarchies.
To begin, I have a 4 shapes classes ...
4
votes
3answers
212 views
Swing GUI in Java
I'm learning Java at the moment and I'm currently trying to make a GUI using Swing. I've done some reading and people usually prefer and advice to use composition instead of inheritance of e.g. ...
8
votes
1answer
148 views
Extending the functionality of lxml.etree
I wrote a class to slightly customize the behavior of lxml.etree.ElementTree and I use it quite extensively. It works great, but there are a few methods that I'm ...
3
votes
1answer
159 views
Object-oriented web scraping with Python
I usually write function-only Python programs, but have decided on an OOP approach (my first thereof) for my current program, a web-scraper. Here is the working code I wrote which I am looking to have ...
1
vote
1answer
105 views
Restricting types not related through inheritance without using instanceOf by creating own class hierarchy
Restricting types not related through inheritance without using instanceOf by creating own class hierarchy. It needs to interact with a key value data store, will ...
1
vote
0answers
633 views
Reusable REST service class for Angular2 in TypeScript
I am creating an Angular 2 web application using TypeScript. This application performs REST requests to a REST "service". For each REST resource in my service I create a separate "Service" class in ...
3
votes
0answers
91 views
Mortgage calculator in JavaScript
I'm learning JavaScript and decided to build this mortgage calculator as a starting point. For the most part it was reasonably straightforward, but when I implemented the graphs using D3 I found ...
3
votes
2answers
187 views
Follow up - Creating Inheritance hierarchy using function constructor
In continuation with this question,
Animal class has four fields:
name
sound
...
8
votes
1answer
122 views
Creating Inheritance hierarchy using function constructor
Problem statement
You need to create the Animal base class having four fields:
a. name
b. ...
3
votes
3answers
354 views
Logic Gate Simulator - Proper Encapsulation
So I was checking out the courses on InteractivePython, and I came across this example to demonstrate inheritance.
My focus is on the Connector class and how it ...
1
vote
2answers
64 views
Adding new articles
Following is a working program to add new articles. The only thing I want is to check if there is any way to write it in a better way, or if the architecture is good as it is.
Maybe I did not have to ...
2
votes
3answers
174 views
Polymorphically processing 2 & 3 dimensional objects
It seems there are a lot of "empty containers" (I do not know the correct, technical term) with regards to multiple levels of abstract classes and functional interfaces with little or no code. Is ...
3
votes
2answers
368 views
Creating n-dimensional mathematical vector classes through inheritance
Right now I have no knowledge of templates, but I just finished learning about inheritance, and wanted to apply it to a Vector3 class that I had already created. My ...
2
votes
1answer
158 views
Sorting polymorphic classes
I'm learning from "Jumping into C++" by Alex Allain (sample chapter and TOC) and solved the first problem in Chapter 26 "Inheritance and Polymorphism".
I'm especially concerned about my use of ...
3
votes
4answers
459 views
An attempt at inheritance (Geometric Shapes)
I'm reading through the chapter on inheritance from C++ Primer 5th Edition. It asks
Organize the following type into an inheritance hierarchy:
(b) Geometric primitives (such as box, circle, ...
4
votes
1answer
40 views
Grids, Cells, and Inheritance
I want to build a grid and I have 2 concepts: Grid which is consist of Cell.
Grid class is:
...
6
votes
1answer
500 views
Creature generator
Originally posted this here, and it was helpfully suggested to post in this forum.
In the past couple of years I've returned part time to programming after a 15 year gap. I was C/UNIX. So, I've ...
7
votes
2answers
488 views
Java - Something similar to Abstract Factory?
I have many repositories stored in a map. User chooses some of them and then a downloading begins. Repository may be one of 4 types (see code below).
...
3
votes
2answers
212 views
Reuse a base class [Activity] handler in all sub classes for background work
We are using the Thread of a common base class but using its handler in all its sub classes. The code is working fine but is it the right way to go about?
Our base class looks like this:
...
4
votes
1answer
121 views
The rounded box that wanted to be an arc
This is from Bjarne Stroustrup's C++ Programming: Principles and Practice, Chapter 13 Exercise 2:
Draw a box with rounded corners. Define a class Box, ...
2
votes
3answers
270 views
Music collection with lyric songs and instrumental pieces
I have problems with dealing with derived classes that inherit from the same base class.
I have 2 types of songs:
Songs with lyrics that have: Title, Tags (sad, happy etc.), lyrics (one line), ...
7
votes
1answer
166 views
Multiple inheritance pattern for vehicle information
I wanted an easy way to augment objects, by adding functionality from any other object(s). More importantly, I needed a way to augment the object from multiple sources in a clean one-line solution.
...
5
votes
2answers
160 views
Base service for two different implementations
I have code that fetches different templates for HTML and CSS in the file system. The templates are stored in different folders, so I have two implementations for the code that fetches them, passing ...
4
votes
1answer
898 views
Optional base class template to get conditional data members
In generic code, I sometimes want to conditionally add a data member to a class template. Writing separate template specializations scales as 2^N for ...
2
votes
1answer
132 views
Lockable linked list
The existing design of class DList and DListNode is taken. The main criteria is to do successive updates in \$O(1)\$ time.
Part ...
7
votes
1answer
447 views
Creating instances of all subclasses in Python
I have a superclass with several subclasses. Each subclass overrides the "solve" method with some a different algorithm for estimating the solution to a particular problem. I'd like to efficiently ...
4
votes
2answers
300 views
Infrastructure for my 2D game using Allegro
I am making a small 2D game with the use of Allegro 5 library. I am making use of inheritance e.g. sprite class as the base class and player class as the child class, but I want to know if it's a good ...
5
votes
1answer
149 views
Code Golf challenge that plays Mafia
I am working on writing a Code Golf King of the Hill challenge, the details of which can be read here. You can read the full code here.
Briefly, the game proceeds in cycles of night then day. There ...
