General guidelines on how to design classes with best known industry practices.

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7
votes
7answers
2k views

At what point do immutable classes become a burden?

When designing classes to hold your data model I've read it can be useful to create immutable objects but at what point does the burden of constructor parameter lists and deep copies become too much ...
14
votes
9answers
1k views

Isn't class scope purely for organization? [duplicate]

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, ...
0
votes
3answers
194 views

How do you balance out code structuring (few big functions vs. many small ones)?

The golden rule of code structuring is always said as splitting into many sub functions is a good thing. Though I noticed it becomes a problem in complex applications when a class of e.g. 10 bigger ...
0
votes
1answer
715 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 ...
49
votes
9answers
3k views

Is there any “real” reason multiple inheritance is hated? [closed]

I've always liked the idea of having multiple inheritance supported in a language. Most often though it's intentionally forgone, and the supposed "replacement" is interfaces. Interfaces simply do ...
44
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 ...
9
votes
5answers
1k views

How do we know to favour composition over generalisation is always the right choice?

Whether an object physically exists or not, we can choose to model it in different ways. We could arbitarily use generalisation or composition in many cases. However, the GoF principle of "favour ...
12
votes
4answers
2k views

Is It “Wrong”/Bad Design To Put A Thread/Background Worker In A Class?

I have a class that will read from Excel (C# and .Net 4) and in that class I have a background worker that will load the data from Excel while the UI can remain responsive. My question is as follows: ...
6
votes
4answers
3k views

Use Dependency Injection For Data Objects?

I'm just learning about dependency injection, and am stuck on something. Dependency Injection recommends sending dependent classes through the constructor, but I'm wondering if this is necessary for ...
11
votes
4answers
1k 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 ...
2
votes
2answers
1k views

What is the best way to work with DAL and BLL?

I'm currently refactoring my DLL and BLL and I need some advice on what is the best way to work with DAL and BLL. My current solution is like this: // DAL class only consists of SQL queries and ...
1
vote
1answer
74 views

When should I pass value as class variable and when as a method argument?

Is there a general rule of thumb, when we should pass a value as as class variable and when as a method argument? Or is it just a choice of the developer? For example -- are there any reasons, why ...
0
votes
2answers
158 views

How To Invoke A Method When It's Class is Accessed (Any Method) - “OnClassEnter”

I am working on a C# net micro framework project, in particular an I2C bus management/class. I have several different I2C devices each defined in separate classes which contain all of the devices' ...