That is because I cannot answer that question with a simple “yes” or “no”. It is such a complicated subject that sometimes the only sensible answer is “it depends”.
Neither does any book or internet article, they just represent an opinion with which you can either agree or disagree. I agree with some but not others - so what??? I cannot possibly agree with every opinion out there, so stop making a fuss about it.
I suggest you follow your own advice. Just because you find a small number of articles which express a particular opinion does not mean that that is the only valid opinion - it is just one among many.
The title of that document is “The Single Responsibility Principle” and in it he uses the words “This is the reason we separate concerns”. Any reasonable person would therefore conclude that “separation of responsibilities” has EXACTLY the same meaning as “separation of concerns”.
No I have not. I have clearly demonstrated that I agree with SOME opinions, just not the same ones as you. So what??? There are so many contradictory opinions out there it is physically impossible to agree with every one of them.
If you read the numerous articles on my website you will see references to those opinions with which I DO agree. so claiming that I disagree with everyone is a terminological inexactitude of gargantuan proportions.
And you don’t???
I do not work in the academic sphere, I work in the commercial sphere which operates under a different set of rules where there has to be a compromise between “perfection” and “workable”
And you don’t???
Anything calling itself a framework which does not exhibit the four characteristics mentioned in https://en.wikipedia.org/wiki/Software_framework has no right to call itself a framework.
Riiight so a peer reviewed journal is equal to a wikipedia article in authority. Really? I suggest you go and look up what academic references are and how peer review works.
But you do take concepts that come from academia and redefine them so they fit your existing code. There is a difference between theory and practice, of course, but that doesn’t mean that practice gets to redefine theoretical concepts. You don’t get to redefine relativity because you don’t like not being able to travel faster than the speed of light.
Because you clearly don’t understand what an authority is, who comes up with the concepts you abuse in the first place and even why they exist. You just see your own framework and then see someone say “SRP” and you then say “Well I must already be doing that” go look at the definition and try to make it fit, unsuccessfully, I might add.
Lets put it this way: If you were looking up a treatment for a disease would you trust wikipedia over a study in the BMJ? The same applies in computing, we just have different journals. IEEE is probably the most well known journal publisher in computing/engineering.
It also does not necessarily mean that a component should be implemented in multiple classes. You are reading what isn’t there.
Nowhere in either of Robert C. Martin’s articles (see http://blog.8thlight.com/uncle-bob/2014/05/01/Design-Damage.html and http://blog.8thlight.com/uncle-bob/2014/05/08/SingleReponsibilityPrinciple.html) does it mention that once you have separated your program logic into GUI logic, business logic and database logic that you should continue to split up each of those areas into smaller units. They DO NOT say that, so it is YOU who is reading what isn’t there.
Where does it say that?
Wikipedia says it clearly.
In object-oriented programming, the single responsibility principle states that every class should have responsibility over a single part of the functionality provided by the software, and that responsibility should be entirely encapsulated by the class. All its services should be narrowly aligned with that responsibility.
Scott
Robert C. Martin said this in the book Clean Code.
The person you like to cherry pick information from. You quote him when it suits you and you can take him out of context, but then ignore him when you are unable to do that. It’s amusing really.
Also, since you love wikipedia so much, please answer the question I asked earlier and you ignored (As you do with uncomfortable questions unless I ask you 10 times):
If SoC and SRP are the same thing, why are there two different wikipedia pages for them?
And this question please:
What are you trying to achieve/prove by coming here and showing that you have a decided to redefine common programming concepts when everyone else in the world already agrees what they mean?
The MVC design pattern specifically mentions three components or objects, so it is reasonable to assume that each of those objects can be supplied from its own class. To say otherwise is to read something which isn’t there.
I disagree. A Controller is responsible for (or concerned with) all control logic. A View is responsible for (or concerned with) all view logic. A Model is responsible for (or concerned with) all domain or business logic.
It is therefore reasonable to assume that I can have a single class for each.
“concerned with” and “responsible for” mean exactly the same thing.
In a purely english sense perhaps, however they have been used to describe particular concepts in OOP. It’s like saying “Car and Automobile mean exactly the same thing” ignoring the fact that “car” can also be used in the context of trains. In which case, they are not the same thing at all. Nuance really isn’t your strong point.
As does every programmer in the universe.
Question: What is the difference between Theory and Practice.
Answer: In Theory there is no difference but in Practice there is.
In practice a theory is sometimes toned down so that it can be applied in a practical way. Theory may define “purity” but sometimes in the real world a working solution can be quicker and cheaper to build than a 100% pure solution. It is a question of balance, of trade-offs.
So you are the only person who can decide which articles have “authority” and which are worthless? Pull the other one, it’s got bells on!!
I have learned not to trust every opinion by every so-called “expert”, especially government experts. How many “expert opinions” have been completely reversed by a different opinion a few years later?
That is EXACTLY what I have implemented. Each of my Model classes is responsible for the business rules associated with a single database table. I have separate classes which deal with control logic, view logic and data access logic. You may have a different opinion, but that doesn’t mean that your opinion is the only one worth having.
Confirmation bias much?
[citation needed] I think!
Unlike you, most people build their code to fit the underlying concepts.
But again, that doesn’t mean you get to redefine the theoretical terms to fit your application. So far you’ve redefined encapsulation, SRP, SoC, coupling and “software component” in order to fit your needs and make the claim “My code follows the concepts!!”. Instead, you should build your code based on the concepts, not redefine the concepts to fit your code.
I am not deciding anything at all. Peer Reviewed Journals are authoratitive because they are published after having extensive scrutinization by experts in the field. Nothing gets into a journal before being heavily critiqued by people at the top of the field. Again, I suggest you go and look up what peer review is because you clearly don’t understand it.
Exactly. And this is a good thing: New data comes along to show that the old theory was wrong and we change treatments based upon the new evidence. At any time the evidence can change, of course but your approach is ignoring the evidence and sticking to what you already have even if a new, measurably better treatment has come out and then claiming “The old treatment is better!!!” or saying “I’m already using the new treatment!!” by redefining what others mean.
That is why I have a separate Controller for each transaction pattern, not a single all-in-one Controller that deals with every pattern
That is why I have a separate View for each output format, not a single all-in-one View that deals with every format.
That is why I have a separate Model for each database table, not a single all-in-one Model that deals with every table.
So you see, I DO have many small classes and not a few big ones.
Again with redefining terms. Redefining “small” is a big step even for you. In what world is 120 methods and 50 variables “small”? Keep in mind Robert C. Martin himself inferred that 70 methods is a “god class”.
Wikipedia on MVC makes no mentions of objects.
No, it actually isn’t. Only you reason that it is reasonable.
Scott
Then what do you call your Default_Table class? It looks like a really big one to me.
Scott