BorlandTalk.com Borland discussion newsgroups   Archives   FAQ   Search   Memberlist   Usergroups   Register   Profile   Log in to check your private messages   Log in  To OOPs or not to OOPs!?!?!?!?          BorlandTalk.com Forum Index -> C++ Builder (Language C++) View previous topic :: View next topic   Author Message Lee Gobroski Guest Posted: Tue Mar 29, 2005 8:04 am    Post subject: To OOPs or not to OOPs!?!?!?!? Hello all, I have been struggling with objects and what not for some time now. I was wondering what the purpose of classes are when you have a function that will do the same thing, and don't need to be instantiated. Are they really faster, and better? I have been looking through all my books, and I can not really find a definitive way of implementing classes/objects in C++ Builder. I know with my last little program, I had to use the TStringList object, but I still don't really understand the need... Thanks Lee Back to top Andrue Cope [TeamB] Guest Posted: Tue Mar 29, 2005 8:28 am    Post subject: Re: To OOPs or not to OOPs!?!?!?!? Lee Gobroski wrote: Quote: I have been struggling with objects and what not for some time now. I was wondering what the purpose of classes are when you have a function that will do the same thing, and don't need to be instantiated. None whatsoever. Objects are useful when there is a collection of related functions that manipulate or rely on state information. IOW if the functions need to have some 'behind the scenes' intelligence. They are also useful when you need to be able to create a generic 'thing' and then derive specialisations from that without the owner knowing about it. Quote: I have been looking through all my books, and I can not really find a definitive way of implementing classes/objects in C++ Builder. You won't find a definitive way to program either. OOP is a complex paradigm and all you can do is read text books, articles, discuss models and generally form an opinion. Even then your opinion may quite legitimately differ from other developers. Quote: I know with my last little program, I had to use the TStringList object, but I still don't really understand the need... TStringList object is a single object that makes storing and manipulating string lists very easy. It takes care of the memory usage and data representation. It provides methods to load and save the string list from memory. It takes care of growing and shrinking the list. it provides mechanisms to assist in creating alternate copies of the list and to resolve ownership symantics. You have to ask yourself "how would you store a list of strings if you didn't use TStringList?". -- Andrue Cope [TeamB] [Bicester, Uk] http://info.borland.com/newsgroups/guide.html Back to top Lee Gobroski Guest Posted: Tue Mar 29, 2005 11:02 am    Post subject: Re: To OOPs or not to OOPs!?!?!?!? Andrue, Thank you for your answer. In my CS 110 class they pressed us pretty hard on the importance of classes and objects, and then we were using Java. Man did I hate that class. I guess that is why I am no longer a CS major. Your reply cleared up some of my confusion. Thanks again. lee "Andrue Cope [TeamB]" <no.spam (AT) not (DOT) a.valid.address> wrote Quote: Lee Gobroski wrote: I have been struggling with objects and what not for some time now. I was wondering what the purpose of classes are when you have a function that will do the same thing, and don't need to be instantiated. None whatsoever. Objects are useful when there is a collection of related functions that manipulate or rely on state information. IOW if the functions need to have some 'behind the scenes' intelligence. They are also useful when you need to be able to create a generic 'thing' and then derive specialisations from that without the owner knowing about it. I have been looking through all my books, and I can not really find a definitive way of implementing classes/objects in C++ Builder. You won't find a definitive way to program either. OOP is a complex paradigm and all you can do is read text books, articles, discuss models and generally form an opinion. Even then your opinion may quite legitimately differ from other developers. I know with my last little program, I had to use the TStringList object, but I still don't really understand the need... TStringList object is a single object that makes storing and manipulating string lists very easy. It takes care of the memory usage and data representation. It provides methods to load and save the string list from memory. It takes care of growing and shrinking the list. it provides mechanisms to assist in creating alternate copies of the list and to resolve ownership symantics. You have to ask yourself "how would you store a list of strings if you didn't use TStringList?". -- Andrue Cope [TeamB] [Bicester, Uk] http://info.borland.com/newsgroups/guide.html Back to top Lee Gobroski Guest Posted: Tue Mar 29, 2005 11:05 am    Post subject: Re: To OOPs or not to OOPs!?!?!?!? Andrue, and to answer you question about how I would handle the string list with out objects, well, I would have no idea where to start. Thank goodness for the Borland team that made that object... Lee "Andrue Cope [TeamB]" <no.spam (AT) not (DOT) a.valid.address> wrote Quote: Lee Gobroski wrote: I have been struggling with objects and what not for some time now. I was wondering what the purpose of classes are when you have a function that will do the same thing, and don't need to be instantiated. None whatsoever. Objects are useful when there is a collection of related functions that manipulate or rely on state information. IOW if the functions need to have some 'behind the scenes' intelligence. They are also useful when you need to be able to create a generic 'thing' and then derive specialisations from that without the owner knowing about it. I have been looking through all my books, and I can not really find a definitive way of implementing classes/objects in C++ Builder. You won't find a definitive way to program either. OOP is a complex paradigm and all you can do is read text books, articles, discuss models and generally form an opinion. Even then your opinion may quite legitimately differ from other developers. I know with my last little program, I had to use the TStringList object, but I still don't really understand the need... TStringList object is a single object that makes storing and manipulating string lists very easy. It takes care of the memory usage and data representation. It provides methods to load and save the string list from memory. It takes care of growing and shrinking the list. it provides mechanisms to assist in creating alternate copies of the list and to resolve ownership symantics. You have to ask yourself "how would you store a list of strings if you didn't use TStringList?". -- Andrue Cope [TeamB] [Bicester, Uk] http://info.borland.com/newsgroups/guide.html Back to top Andrue Cope [TeamB] Guest Posted: Tue Mar 29, 2005 11:11 am    Post subject: Re: To OOPs or not to OOPs!?!?!?!? Lee Gobroski wrote: Quote: Thank goodness for the Borland team that made that object... Oh yes. You'll be especially grateful any time you need to load a text file from disk: std::auto_ptr<TStringList> sl( new TStringList() ); sl->LoadFromFile( "textfile.txt" ); -- Andrue Cope [TeamB] [Bicester, Uk] http://info.borland.com/newsgroups/guide.html Back to top Chris Uzdavinis (TeamB) Guest Posted: Tue Mar 29, 2005 2:46 pm    Post subject: Re: To OOPs or not to OOPs!?!?!?!? "Lee Gobroski" <gobroski (AT) oddlee (DOT) net> writes: Quote: Hello all, I have been struggling with objects and what not for some time now. I was wondering what the purpose of classes are when you have a function that will do the same thing, and don't need to be instantiated. Are they really faster, and better? A class is more than just a function. A class is the bundling of "state" plus "behavior". A class exposes an interface to allow you to modify the state it represents, and with access restrictions, you can have implementation details remain unusable to outside code. Objects are good at encapsulating data, hiding implementation details, decreasing dependencies between code, and (through polymorphism) allowing immense amounts of code reuse. -- Chris (TeamB); Back to top Bruce Salzman Guest Posted: Tue Mar 29, 2005 5:42 pm    Post subject: Re: To OOPs or not to OOPs!?!?!?!? Well designed encapsulation frees you to think about what an object does rather than how it does it. Classes hide the details that you should ignore when dealing with an object as a logical entity. If done right, your design can elegantly handle complexity that is an order of magnitude greater than it might otherwise. Of course, a poorly designed set of classes can negate any benefit. The most amazing thing in my experience is making some major modifications to a base class that many other classes derive from, recompiling everything, and having it all work! No, really! Sometime it does! ;^) Try that with procedural programming... Regards, Bruce Back to top Andrue Cope [TeamB] Guest Posted: Wed Mar 30, 2005 8:09 am    Post subject: Re: To OOPs or not to OOPs!?!?!?!? Bruce Salzman wrote: Quote: The most amazing thing in my experience is making some major modifications to a base class that many other classes derive from, recompiling everything, and having it all work! Oh yes - what I call 'join the dots' programming. You realise you need one of these to talk to one of these to talk to one of these and it all works. -- Andrue Cope [TeamB] [Bicester, Uk] http://info.borland.com/newsgroups/guide.html Back to top Lee Gobroski Guest Posted: Wed Mar 30, 2005 9:09 am    Post subject: Re: To OOPs or not to OOPs!?!?!?!? (thanks) HI all... Thanks for all your insight... I will learn how to use classes / objects, but for what I do now I don't think I need them. I like the idea of connect the dot programming, and all that reusability that objects are so good at. I think this weekend I will play a little with how to make a class, does any one have a good site that could provide a tutorial, I have the book teach your self BCB in 21 days, and the subject it mentioned in that... so I am just looking for anything that would help to solidify the information, and more specific to BCB 6.0 Lee "Lee Gobroski" <gobroski (AT) oddlee (DOT) net> wrote Quote: Hello all, I have been struggling with objects and what not for some time now. I was wondering what the purpose of classes are when you have a function that will do the same thing, and don't need to be instantiated. Are they really faster, and better? I have been looking through all my books, and I can not really find a definitive way of implementing classes/objects in C++ Builder. I know with my last little program, I had to use the TStringList object, but I still don't really understand the need... Thanks Lee Back to top Brent Guest Posted: Fri Apr 01, 2005 4:55 am    Post subject: Re: To OOPs or not to OOPs!?!?!?!? (thanks) There is an interesting article at this website on developing a datetime object in C++. It explains the differences between low level programming (developing the object) and application programming (using the object). Its a 3 part series that was published in February, April and July of 2004. Well worth a look. Brent http://bcbjournal.org/volume8.php "Lee Gobroski" <gobroski (AT) oddlee (DOT) net> wrote Quote: HI all... Thanks for all your insight... I will learn how to use classes / objects, but for what I do now I don't think I need them. I like the idea of connect the dot programming, and all that reusability that objects are so good at. I think this weekend I will play a little with how to make a class, does any one have a good site that could provide a tutorial, I have the book teach your self BCB in 21 days, and the subject it mentioned in that... so I am just looking for anything that would help to solidify the information, and more specific to BCB 6.0 Lee "Lee Gobroski" <gobroski (AT) oddlee (DOT) net> wrote in message news:42490c04 (AT) newsgroups (DOT) borland.com... Hello all, I have been struggling with objects and what not for some time now. I was wondering what the purpose of classes are when you have a function that will do the same thing, and don't need to be instantiated. Are they really faster, and better? I have been looking through all my books, and I can not really find a definitive way of implementing classes/objects in C++ Builder. I know with my last little program, I had to use the TStringList object, but I still don't really understand the need... Thanks Lee Back to top Andrue Cope [TeamB] Guest Posted: Fri Apr 01, 2005 7:58 am    Post subject: Re: To OOPs or not to OOPs!?!?!?!? (thanks) Brent wrote: Quote: "Lee Gobroski" <gobroski (AT) oddlee (DOT) net> wrote in message Could you trim your quoting, please, Brent? Thanks. -- Andrue Cope [TeamB] [Bicester, Uk] http://info.borland.com/newsgroups/guide.html Back to top Lee Gobroski Guest Posted: Sun Apr 03, 2005 7:53 am    Post subject: Re: To OOPs or not to OOPs!?!?!?!? (thanks) Thanks Brent once I get some money I going to pay for a subscription.. "Brent" <nospam (AT) nospam (DOT) com> wrote Quote: There is an interesting article at this website on developing a datetime object in C++. It explains the differences between low level programming (developing the object) and application programming (using the object). Its a 3 part series that was published in February, April and July of 2004. Well worth a look. Brent http://bcbjournal.org/volume8.php "Lee Gobroski" <gobroski (AT) oddlee (DOT) net> wrote in message news:424a6cc2 (AT) newsgroups (DOT) borland.com... HI all... Thanks for all your insight... I will learn how to use classes / objects, but for what I do now I don't think I need them. I like the idea of connect the dot programming, and all that reusability that objects are so good at. I think this weekend I will play a little with how to make a class, does any one have a good site that could provide a tutorial, I have the book teach your self BCB in 21 days, and the subject it mentioned in that... so I am just looking for anything that would help to solidify the information, and more specific to BCB 6.0 Lee "Lee Gobroski" <gobroski (AT) oddlee (DOT) net> wrote in message news:42490c04 (AT) newsgroups (DOT) borland.com... Hello all, I have been struggling with objects and what not for some time now. I was wondering what the purpose of classes are when you have a function that will do the same thing, and don't need to be instantiated. Are they really faster, and better? I have been looking through all my books, and I can not really find a definitive way of implementing classes/objects in C++ Builder. I know with my last little program, I had to use the TStringList object, but I still don't really understand the need... Thanks Lee Back to top Thomas Maeder [TeamB] Guest Posted: Sun Apr 03, 2005 11:28 am    Post subject: Re: To OOPs or not to OOPs!?!?!?!? (thanks) Please direct your browser at http://info.borland.com/newsgroups/ and read the newsgroup guidelines. One of them asks us not to quote entire posts we are following up to; instead, please trim the quotes to the parts relevant for your reply. Thanks! 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