General guidelines on how to design classes with best known industry practices.
0
votes
2answers
68 views
What is the convention regarding class names that may already exist in the ORM?
This is a generic question about class names and ORMs, but for context; I'm working on a Flask web app in Python using SQLalchemy.
I'm struggling with naming a new class that will contain the ...
3
votes
4answers
229 views
Is it a good practice to create a ClassCollection of another Class?
Lets says I have a Carclass:
public class Car
{
public string Engine { get; set; }
public string Seat { get; set; }
public string Tires { get; set; }
}
Lets say we're making a system ...
3
votes
5answers
284 views
What classes to put exactly in a class diagram?
What classes must I put in a class diagram? Only classes used in Business Layer and associations between them? Or also other classes in the Data Access Layer, Service Layer, etc.?
8
votes
4answers
316 views
What would be the best way to store movements on a game to allow a rollback?
I'm developing a board game that has a game class that controls the game flow, and players attached to the game class. The board is just a visual class, but the control of the movements is all by the ...
0
votes
1answer
177 views
How can my code structure be improved? [closed]
I am looking for advice on the neatest way to structure my code.
class Password
{
private string cipher;
Password(string cipher)
{
this.cipher = cipher;
}
public string ...
3
votes
3answers
336 views
Why is it so difficult to know where to use interfaces,generics in program design?
I am attempting to learn c# from the head first series, in addition i also consult other books such as Pro C# by Andrew Tolson.
Now the thing is that i perfectly understand the interface,generics ...
1
vote
1answer
87 views
Designing a list class with filtering and sorting
The app I'm developing needs to display lists of items. Simple enough, but there are a number of things which can change based on user input:
Items can be added to/removed from the list.
The items ...
18
votes
2answers
899 views
Is it a good idea to provide different function signatures that do the same thing?
Here is a C++ class that gets constructed with three values.
class Foo{
//Constructor
Foo(std::string, int, char);
private:
std::string foo;
char bar;
int baz;
};
All of ...
3
votes
3answers
253 views
Architecting persistence (and other internal systems). Interfaces, composition, pure inheritance or centralization?
Suppose that you need to implement persistence, I think that you're generally limited to four options (correct me if I'm wrong, please)
Each persistant class:
Should implement an interface ...
8
votes
7answers
693 views
Is it appropriate for a class to only be a collection of information with no logic?
Say I have a class Person that has instance variables age, weight, and height, and another class Fruit that has instance variables sugarContent and texture. The Person class has no methods save ...
0
votes
3answers
299 views
UML - Class Diagrams Order -> Products
I have a class diagram that is like this:
< Order > (1) CAN HAVE (M) < products >
But therefore Order has the following:
Order_Id
Customer_Id
Order_date_day
Order_date_month
...
0
votes
1answer
240 views
Class Design and Structure Online Web Store
I hope I have asked this in the right forum.
Basically, we're designing an Online Store and I am designing the class structure for ordering a product and want some clarification on what I have so ...
3
votes
3answers
173 views
How to name an subclass that add a minor, detailed thing?
What is the most concise (yet descriptive) way of naming a subclass that only add a specific minor thing to the parent? I encountered this case a lot in WPF, where sometime I have to add a small ...
6
votes
4answers
760 views
C++ - Constructor or Initialize Method to Startup [duplicate]
Possible Duplicate:
Avoid having an initialization method
I want to determine when to do non-trivial initialization of a class. I see two times to do initialization: constructor and other ...
2
votes
2answers
115 views
Strategies for invoking subclass methods on generic objects [duplicate]
Possible Duplicate:
Alternatives to type casting in your domain
I've run into this issue in a number of places and have solved it a bunch of different ways but looking for other solutions ...
3
votes
2answers
534 views
DB Object passing between classes singleton, static or other?
So I'm designing a reporting system at work it's my first project written OOP and I'm stuck on the design choice for the DB class.
Obviously I only want to create one instance of the DB class ...
17
votes
9answers
1k views
Isn't class scope purely for organization?
Isn't scope just a way to organize classes, preventing outside code from accessing certain things you don't want accessed?
More specifically, is there any functional gain to having public, protected, ...
3
votes
1answer
96 views
Naming a class that processes orders
I'm in the midst of refactoring a project. I've recently read Clean Code, and want to heed some of the advice within, with particular interest in Single Responsibility Principle (SRP).
Currently, ...
0
votes
3answers
129 views
Best practice to propagate preferences of application
What is your approach with propagation to all classes/windows of preferences/settings of your application?
Do you share the preference_manager class to all classes/windows who need it or you make ...
43
votes
12answers
3k views
Is it bad practice to pass instances through several layers?
In my program design, I often come to the point where I have to pass object instances through several classes. For example, if I have a controller that loads an audio file, and then passes it to a ...
5
votes
4answers
319 views
Method flags as arguments or as member variables?
I think the title "Method flags as arguments or as member variables?" may be suboptimal, but as I'm missing any better terminology atm., here goes:
I'm currently trying to get my head around the ...
6
votes
3answers
844 views
Data classes: getters and setters or different method design
I've been trying to design an interface for a data class I'm writing. This class stores styles for characters, for example whether the character is bold, italic or underlined. But also the font-size ...
0
votes
1answer
432 views
A sample Memento pattern: Is it correct?
Following this query on memento pattern, I have tried to put my understanding to test.
Memento pattern stands for three things:
Saving state of the "memento" object for its successful ...
11
votes
4answers
847 views
Object Oriented Programming: getters/setters or logical names
I'm currently thinking about an interface to a class I'm writing. This class contains styles for a character, for example whether the character is bold, italic, underlined, etc. I've been debating ...
1
vote
1answer
82 views
How to represent association in programs [closed]
Could someone help me in implementing association in cpp. I am trying to implement a dice game where I have two classes a diegame and a dice.
3
votes
6answers
1k views
How to properly design classes for a big project?
If we need to represent classes in a class diagram for a big project that is not completely designed yet, and the classes have to be actual tables in a database, how would we predict and design the ...
0
votes
4answers
558 views
When using Hibernate can we forget about Database Design?
We started (just me and my friend) working on a website. As a part design phase we have finished the drawing a Site Map, decided on the content in each of the web page and the navigation.
As we want ...
0
votes
1answer
95 views
The design of a generic data synchronizer, or, an [object] that does [actions] with the aid of [helpers]
I'd like to create a generic data-source "synchronizer," where data-source "types" may include MySQL databases, Google Spreadsheets documents, CSV files, among others. I've been trying to figure out ...
1
vote
2answers
128 views
Class design, One class in two sources
Is it possible define methods from the same class in different "CPP" files?
I have header file "myClass.h" with:
class myClass
{
public:
// methods for counting
...
// methods for ...
5
votes
3answers
1k views
Can a class be inside another class?
Here's an excerpt from "The C++ Programming Language"
template<classT> class List { // optimal
public:
class Link { /* ... */ };
List (); // initially empty
void put(T *); // put before current ...
2
votes
6answers
970 views
Class Design — Multiple Calls from One Method or One Call from Multiple Methods?
I've been working on some code recently that interfaces with a CMS we use and it's presented me with a question on class design that I think is applicable in a number of situations. Essentially, what ...
3
votes
3answers
127 views
Class fields/variables. Keep single reference point at class level or pass to individual methods?
Often I see a class where a value is injected into a method or even a constructor. That value is then used by several methods within that class and a reference is simply passed through to each method ...
2
votes
0answers
176 views
Provide an OnChange event for an internal property which is controlled externally?
For fun and by request I am updating this ImageGrid component, a kind of listbox for images that has a FileNames property of type TStrings.
For ease of writing, I have been misusing its ...
4
votes
3answers
136 views
What class structure allows for a base class and mix/match of subclasses? (Similar to Users w/ roles)
I have a set of base characteristics, and then a number of sub-types. Each instance must be one of the sub-types, but can be multiple sub-types at once. The sub-types of each thing can change. In ...
8
votes
3answers
697 views
Base classes as factories?
I was writing some code over the weekend and I found myself wanting to write a factory as a static method in a base class.
My question is simply to know if this is a c# idomatic approach?
My sense ...
1
vote
1answer
776 views
Encapsulating a class within another class to hide it's exposed properties and details
I have essentially a data model class that represents an XML data structure that we use to model our system. The model class is in a shared project that is used by a number of different solutions in ...
6
votes
3answers
113 views
Grouping conceptual algorithms into one class or associate with their object models
If I have a number of classes, lets say a variety of buildings of some sort. Each of these buildings have various properties and do some stuff etc
Now there is a set of operations I need to do on ...
3
votes
2answers
173 views
Designing class methods: self contained or explicit calls?
I'm probably butchering the terms, if someone knows the appropriate terms - that'd be great.
But my question is: should I design my classes so that their methods' parameters be accessible from the ...
7
votes
5answers
841 views
Interface and Inheritance: Best of both worlds?
I 'discovered' interfaces and I started to love them. The beauty of an interface is that it is a contract, and any object that fulfills that contract can be used wherever that interface is required.
...
5
votes
4answers
241 views
Best way to handle class relationship
Take a User class and the idea that a User is to be profiled. I see four ways to handle this:
Write the code for the profile into the User class. I am dismissing this right away.
Create a Profile ...
6
votes
10answers
422 views
Teaching Classes and Objects
I'm trying to teach how an object is just an instance of a class to a buddy of mine. However, he doesn't seem to understand it so well.
I've heard a ton of the examples (blueprint to a house, etc.) ...
6
votes
6answers
452 views
Organizing Class Members in Regards to Access Modifier
If we look at typical implementation of a Class, we usually see the private members defined at the beginning and public( mostly functions and Accessors) defined towards the bottom. Now, is this a ...
0
votes
3answers
312 views
Review my class hierarchy [closed]
I have created a class hierarchy for an inventory system for a book/magazine. Here's the picture:
Will it do? I know there's no magazine class yet but I was wondering if anyone could suggest a ...
2
votes
3answers
291 views
Is partial classes modern Subject-Oriented programming?
Important discussion follows:
C# and other language have made partial classes more popular.
But isn't this really a tool that have reinvented the subject-orientated programming wheel?
What do you ...
3
votes
3answers
268 views
Proper use of classes
I'm writing a class that draws a very complex image, with multiple parts. I also plan on adding to the class to add more functionality. Would it be right to make a function for each part, even if that ...
5
votes
2answers
300 views
Should exceptions of a subclass extend the superclass exceptions or my own namespace?
Our library extends another (third-party) library. When we create a child class in our library, and want to throw exceptions, should those exceptions extend the exceptions from the parent class or ...
5
votes
7answers
942 views
Where should I put my utility methods?
I am very new to Visual Studio and C# and am wondering how best to create a repository of sorts for utility methods.
For instance, we need a method that returns the current fiscal year and other ...
9
votes
2answers
282 views
is it a reasonable practice to extend a class just to reuse a single function?
I am developing a range of post filters for a wordpress site, and I have built the first 4 with a single class.
The final two are different enough in scope to only share a single function (the ...
0
votes
2answers
121 views
Is hooking Data access method on wrong object detrimental for a developer
In a simple application I am creating there are Admin and users where admin can create users. Right now I am creating Classes that encapsulate database CRUD calls with methods.
For example: ...
5
votes
5answers
579 views
Prefer class members or passing arguments between internal methods?
Suppose within the private portion of a class there is a value which is utilized by multiple private methods. Do people prefer having this defined as a member variable for the class or passing it as ...
