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0
votes
2answers
73 views

When should you create/destroy underlying object in a class that wraps it

(note: I used Java to make it easer to explain my question, but the actual language is irrelevant for this dilemma) TL; DR: I have a wrapper around some underlying class. At which point should I ...
-1
votes
0answers
39 views

Clearly defining an Implementation detail [duplicate]

In what way could I, when designing my API, framework or whatever decide what is and what is not an implementation detail? What questions do I ask in order to correctly answer: "Is that something my ...
0
votes
0answers
60 views

Am I following a good design thought process? Is the Abp framework overkill?

As I finish one project and start another, I have a small time window to come up with an architecture for the new. I am coming from the following design: Web applicationReceives domain models & ...
0
votes
2answers
143 views

Designing Nested List<Class> Property in a Class

I'm currently in the class modeling phase of my project. Real life Scenario: Let's say I have a Project that is composed of Main Components and each Main Component is composed of Sub Components and ...
20
votes
7answers
4k views

Is there a more intelligent way to do this besides a long chain of if statements or switch?

I'm implementing an IRC bot that receives a message and I'm checking that message to determine which functions to call. Is there a more clever way of doing this? It seems like it'd quickly get out of ...
5
votes
1answer
70 views

Designing communications for extensibility

I am working on the design stages of an application that will a) collect data from various sources (in my case that's scientific data from serial ports), keeping track of the age of the data, b) ...
0
votes
4answers
194 views

Why encapsulate container variables? [duplicate]

I wasn't sure how to formulate the title, but there's something that's made little sense to me in OOP I understand the idea of encapsulation, which is to create a layer of protection, and ...
2
votes
1answer
75 views

How to handle errors best addressed in a higher abstraction layer and dependent on state inferred in current layer?

I have a use-case that can be repaired, but the logic for repairing it is best done in a higher level of abstraction. Just throwing exception/failure is ugly because it's hard to pass back up through ...
73
votes
13answers
7k views

Why would Square inheriting from Rectangle be problematic if we override the SetWidth and SetHeight methods?

If a Square is a type of Rectangle, than why can't a Square inherit from a Rectangle? Or why is it a bad design? I have heard people say: If you made Square derive from Rectangle, then a Square ...
0
votes
0answers
73 views

Creating New Wrapper Objects and Extension Classes and Keeping it Organized

Here's my situation: I'm programming an embedded device with a very simple, but customizable LED array display. It's 10 RGB LEDs linearly setup. The LEDs will be used to display many different ...
3
votes
1answer
162 views

Should I assert in packages? [duplicate]

I have read a few asserts vs exception questions already; I ask specifically about package visible classes though. When you write a package, the classes marked with "public" are exposed to the ...
2
votes
3answers
215 views

Abstraction concept in OOP

I hear that Abstraction is a technique that helps us identify which specific information should be visible, and which information should be hidden. Encapsulation is then the technique for packaging ...
6
votes
3answers
221 views

Dependency Injection vs Mixing Levels of Abstraction

I've been reading Clean Code: A Handbook of Agile Software Craftsmanship by Robert C. Martin. One point he makes: G34 Functions should descend only one level of abstraction However, I'm ...
0
votes
3answers
139 views

Is declaring STL variables in a class definition too revealing?

If you are trying to hide implementation, would declaring STL variables be too revealing? // in Word_Bucket.h class Word_Bucket { private: std::vector<std::string> contents; ...etc } ...
0
votes
1answer
262 views

How to use namespaces to separate interface from implementation, in c++?

As far as I can tell, you can make your interface known to others by providing your .h file. Your .cpp is the implementation. Then they can see the function names, the parameter types, the return ...
2
votes
3answers
739 views

Empty virtual method on base class VS abstract methods

I couldn't find a question that was not too specific to some case, so I'll try to make this very generic. We need an extractor base class to a set of documents, for example. Each document has its ...
2
votes
2answers
205 views

I'm struggling with abstracting my animation code in my game using a functional style. How can I do this?

My game is a top down 2D shmup programmed in a functional style. I'm struggling with abstracting the code that is responsible for animating the projectiles. There are many types of guns with many ...
3
votes
5answers
626 views

Why is Encapsulation considered a primary principle in OOP?

I am currently trying to understand more deeply the 4 principles of OOP: Abstraction, Encapsulation, Inheritance, and Polymorphism. After studying the four principles, I don't fully understand why ...
1
vote
3answers
229 views

Confused about the definition of 'abstraction' in OOP

I am trying to understand the definition of 'abstraction' in OOP. I have come across a few main definitions. Are they all valid? Is one of them wrong? I'm confused. (I re-wrote the definition with my ...
0
votes
1answer
118 views

Names for generic classes - how to avoid naming them just “object”? Use synonyms?

When programming, I often end up naming some generic class (think of an abstract base class for stuff you manage in your project) something like FooObject, FooComponent or FooItem (where Foo is an ...
0
votes
1answer
55 views

Would it make sense to add parameters of an inferred type to inheritance?

I'll write this in PHP (where this thought originated), but this is generic to any object-orientated language. Basically, this is an addition to abstract classes that defines the implementation of its ...
3
votes
3answers
261 views

Does Exception Handling Violates “Program to Abstraction”? [duplicate]

I am talking based on experience with Java and C#. I do not know if other language have different exception handling implementation. In order to achieve loose coupling, we need our code being ...
2
votes
3answers
426 views

What is an “abstraction layer”?

I need a very simple explanation because I'm not a professional programmer. I found the terminology "abstraction layer" reading the documentation of mysqli extension where is described the difference ...
4
votes
5answers
449 views

Is my understanding of abstract datatypes correct?

After reading lots of pages on various sites, I came to the conclusion that abstract datatype helps to separate the use of datastructure from its implementation. We can easily map the data into a ...
4
votes
3answers
273 views

How to avoid unmaintainable code when using SQL in an MVC setting?

I want to present a list of products to the user. This list is paginated and can be sorted by the user by product ID or product name in ascending or descending order. I am using an MVC setting, where ...
2
votes
1answer
472 views

Am I right to be skeptical of ASP.NET MVC “Html Helpers”? [closed]

ASP.NET WebForms seemed really great until that moment of realization the abstraction you'd welcomed was producing HTML that was worlds away from what you needed. Wrestling with that framework to ...
3
votes
1answer
149 views

Understanding abstraction

I am trying to understand object oriented code better and I decided to start at abstraction. If I am not incorrect, abstraction means that you hide information that isn't relevant to what task you ...
2
votes
2answers
279 views

Why is it not standard to implement abstraction layers for the file system?

I have been taught to access databases through abstraction layers. I was wondering why it is not also standard practice to access the file system through an abstraction layer? It seems to me unit ...
2
votes
2answers
236 views

How does aggregation work when databases are involved?

So I'm reading a book on Design Patterns (Design Patterns Explained 2nd Edition), and all throughout the book it says to "favor aggregation over inheritance". I'm trying to wrap my head around trying ...
6
votes
2answers
152 views

Abstracting user interface from domain

My course text suggests creating a 'facade' class to completely abstract the user interface from the domain layer. That is, the UI uses only basic types, and if it needs a reference to a domain ...
2
votes
5answers
214 views

Short function names for often used function or general concept

I am a bit in a dilemma: Let's suppose I have a very general function and a specialization of it for convenience reasons. Let's also assume that the specialized function is used 90 per cent of the ...
0
votes
2answers
377 views

Refactorable God v.s. too many classe [duplicate]

So I have this problem: in order to structure my code hierarchically, for every new tiny thing, I create a separate sub-folder, file, class ... and in it one 10-line function. It is an anti-pattern. ...
4
votes
5answers
736 views

What is the name of this particular kind of over-engineering? [closed]

When faced with (even a small) project, I tend to fall into the following bad practice. I think about the structure of the problem. Then I create some base classes, derive from them and then derive ...
1
vote
3answers
153 views

How to call something that can be both a user and a usergroup? [closed]

My idea is, to create an abstract class / interface which can be extended into a user, and into a usergroup. There actually is a good reason for there being this interface connecting the groups with ...
1
vote
1answer
206 views

Why does this article state that graduate education liberate one from concerns like the efficiency of hardware-based integers?

Quoting The Evolution of Haskell Programmer, graduate education tends to liberate one from petty concerns about, e.g., the efficiency of hardware-based integers What exactly does this ...
2
votes
2answers
474 views

Code Reuse and Abstraction in FP vs OOP [closed]

I've been told that code reuse and abstraction in OOP is far more difficult to do than it is in FP, and that all the claims that have been made about Object Orientedness (for lack of a better term) ...
36
votes
4answers
2k views

Can too much abstraction be bad?

As programmers I feel that our goal is to provide good abstractions on the given domain model and business logic. But where should this abstraction stop? How to make the trade-off between abstraction ...
2
votes
1answer
168 views

Adding explicit interfaces to Legacy managed C++ code

I have a bit of a challenge and I am not sure how to approach this. We have a very very large project (that is about 5 years old). The code base is HUGE so a full refactor is out of the question. ...
5
votes
2answers
664 views

Does learning to play an instrument improve programming ability? [closed]

I've seen plenty of questions asking if listening to music boosts productivity, etc. but I haven't been able to find one about performing music. Learning to play the piano has been on my to-do list ...
0
votes
3answers
358 views

Designing a SQL-like encapsulation object for programmatic use

In the last few weeks, I have been working on a Data Mapping Library, which has involved lots of research, experimentation, crying, blaming the whiteboard for not being big enough, and more research. ...
7
votes
3answers
688 views

Refactoring an existing abstract class and its parameters

I have an abstract class A which declares an abstract method doStuff. Currently there are many classes that inherit from A and implement doStuff. The class' instances are initialized at run-time ...
4
votes
1answer
481 views

Is this over-abstraction? (And is there a name for it?)

I work on a large Django application that uses CouchDB as a database and couchdbkit for mapping CouchDB documents to objects in Python, similar to Django's default ORM. It has dozens of model classes ...
3
votes
2answers
338 views

Is there a name for being able to quickly find the relevant code? [closed]

I notice that a property of codebases that I like hacking on is that it's quick to find the relevant code for some feature, without knowing much about the code base at all. For example, searching for ...
8
votes
5answers
844 views

Why does Java use so many middlemen? [closed]

For example to read data from a website we do: HttpResponse httpResponse = httpClient.execute(httpPost); HttpEntity httpEntity = httpResponse.getEntity(); is = ...
2
votes
1answer
641 views

Using a DAO to abstract our ORM from the rest of the application

We're using MySQL with Sequelize.js as the ORM. What we're wondering is whether a DOA layer of abstraction is worthwhile. Here are our options: To use the Sequelize models throughout the ...
11
votes
6answers
661 views

What changes are too big to be made easy by proper design?

This is a rather vague question, but it's something I've never felt has been answered in a satisfactory way when reading about proper design. Generally, when learning about Object Oriented ...
24
votes
8answers
2k views

Do frameworks put too much abstraction? [closed]

I've been programming for a little under a year and have some experience writing systems applications, web apps, and scripts for businesses/organizations. However, one thing I've never really done is ...
7
votes
3answers
182 views

Rules about the concreteness of method parameter types, return types and property types

Some time ago I read a kind of "rule of thumb" about the concreteness of method parameter types, return types and property types, but I just do not remember it. It said something about keep your ...
2
votes
1answer
326 views

What kind of abstraction/SoC should I use here?

I am starting a new project, and I want to follow the separation of concerns pattern, and I have been reading on the topic, and now I am in doubt of how I should go about this. Here is how I ...
5
votes
2answers
879 views

How does strengthening of pre conditions and weakening of post conditions violate Liskov Substitution principle?

I read that Liskov substitution principle is violated if : Pre conditions are strengthened . Post conditions are eased out. But I don't get fully yet how these two points would violate Liskov ...