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  • Multiple classes in a single .cs file - good or bad?

    - by Sergio
    Is it advisable to create multiple classes within a .cs file or should each .cs file have an individual class? For example: public class Items { public class Animal { } public class Person { } public class Object { } } Dodging the fact for a minute that this is a poor example of good architecture, is having more than a single class in a .cs file a code smell?

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  • Why is my class worse than the hierarchy of classes in the book (beginner OOP)?

    - by aditya menon
    I am reading this book. The author is trying to model a lesson in a college. The goal is to output the Lesson Type (Lecture or Seminar), and the Charges for the lesson depending on whether it is a hourly or fixed price lesson. So the output should be: lesson charge 20. Charge type: hourly rate. lesson type seminar. lesson charge 30. Charge type: fixed rate. lesson type lecture. When the input is as follows: $lessons[] = new Lesson('hourly rate', 4, 'seminar'); $lessons[] = new Lesson('fixed rate', null, 'lecture'); I wrote this: class Lesson { private $chargeType; private $duration; private $lessonType; public function __construct($chargeType, $duration, $lessonType) { $this->chargeType = $chargeType; $this->duration = $duration; $this->lessonType = $lessonType; } public function getChargeType() { return $this->getChargeType; } public function getLessonType() { return $this->getLessonType; } public function cost() { if($this->chargeType == 'fixed rate') { return "30"; } else { return $this->duration * 5; } } } $lessons[] = new Lesson('hourly rate', 4, 'seminar'); $lessons[] = new Lesson('fixed rate', null, 'lecture'); foreach($lessons as $lesson) { print "lesson charge {$lesson->cost()}."; print " Charge type: {$lesson->getChargeType()}."; print " lesson type {$lesson->getLessonType()}."; print "<br />"; } But according to the book, I am wrong (I am pretty sure I am, too). The author gave a large hierarchy of classes as the solution instead. In a previous chapter, the author stated the following 'four signposts' as the time when I should consider changing my class structure: Code Duplication The Class Who Knew Too Much About His Context The Jack of All Trades - Classes that try to do many things Conditional Statements The only problem I can see is Conditional Statements, and that too in a vague manner - so why refactor this? What problems do you think might arise in the future that I have not foreseen?

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  • Is it evil to model JSON responses to classes when they are mostly smilar?

    - by Aybe
    Here's the problem : While implementing a C# wrapper for an online API (Discogs) I've been faced to a dilemma : quite often the responses returned have mostly similar members and while modeling these responses to classes, some questions surfaces on which way to go would be the best. Example : Querying for a 'release' or a 'master' will return an object that contains an array of 'artist', however these 'artists' do not exactly have the same members. Currently I decided to represent these 'artists' as a single 'Artist' class, against having respective 'ReleaseArtist' and 'MasterArtist' classes which soon becomes very confusing even though another problem arises : when a category (master or release) does not return these members, they will be null. Though it might sound confusing as well I find it less confusing than the former situation as I've tackled the problem by simply not showing null members when visualizing these objects. Is this the right approach to follow ? An example of these differences : public class Artist { public List<Alias> Aliases { get; set; } public string DataQuality { get; set; } public List<Image> Images { get; set; } public string Name { get; set; } public List<string> NameVariations { get; set; } public string Profile { get; set; } public string Realname { get; set; } public string ReleasesUrl { get; set; } public string ResourceUrl { get; set; } public string Uri { get; set; } public List<string> Urls { get; set; } } public class ReleaseArtist { public string Join { get; set; } public string Name { get; set; } public string Anv { get; set; } public string Tracks { get; set; } public string Role { get; set; } public string ResourceUrl { get; set; } public int Id { get; set; } }

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  • How can I use UML to model a relationship between two classes, where one has functions exposed as friend to the other?

    - by user1796528
    I have a two classes: ------------ --------------- X Y ------------ --------------- relation ------------ ------------------ --------------- A() C() B() D() E() ------------ --------------- I want to inherit just these two functions from X class, where they are defined with the friend access modifier. My class will be: --------------- Y --------------- --------------- C() A() D() --------------- Y class uses some functions of X class namely A and D. How can I model this relationship in a UML class diagram?

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  • Multiple classes in a single .cs file - good or bad?

    - by Sergio
    Is it advisable to create multiple classes within a .cs file or should each .cs file have an individual class? For example: public class Items { public class Animal { } public class Person { } public class Object { } } Dodging the fact for a minute that this is a poor example of good architecture, is having more than a single class in a .cs file a code smell?

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  • Receive anonymous users' input by web upload form or email. Any online service for that?

    - by sja
    Are you aware of any online service or online "platform" allowing users, not previously registered, to upload pairs of picture+comment to a database? It would be a collaborative database of picture+comment pairs. I'm not going wiki or googlegroup, picasa or such because I'd like the user to have the least to do to participate, that is e.g.: take a picture with his phone and email it to an email to an email address. Or go to a web page with an upload form, type in a description, hit OK and that's it. And the goal is also that it be as hassle-less to put up as possible. Yeah I know, it can't programme itself to my requirements :) by I'm suspecting there's a tool or tool combination going a decent way through my needs. Thanks for any info/advice! SJA (NB the final goal is a kind of crowd-sourced census of specific urban items. If you have comment about the potential for spam-overload of my idea, other than "you're doomed", you're welcome!)

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  • Is it dangerous for me to give some of my Model classes Control-like methods?

    - by Pureferret
    In my personal project I have tried to stick to MVC, but I've also been made aware that sticking to MVC too tightly can be a bad thing as it makes writing awkward and forces the flow of the program in odd ways (i.e. some simple functions can be performed by something that normally wouldn't, and avoid MVC related overheads). So I'm beginning to feel justified in this compromise: I have some 'manager programs' that 'own' data and have some way to manipulate it, as such I think they'd count as both part of the model, and part of the control, and to me this feels more natural than keepingthem separate. For instance: One of my Managers is the PlayerCharacterManager that has these methods: void buySkill(PlayerCharacter playerCharacter, Skill skill); void changeName(); void changeRole(); void restatCharacter(); void addCharacterToGame(); void createNewCharacter(); PlayerCharacter getPlayerCharacter(); List<PlayerCharacter> getPlayersCharacter(Player player); List<PlayerCharacter> getAllCharacters(); I hope the mothod names are transparent enough that they don't all need explaining. I've called it a manager because it will help manage all of the PlayerCharacter 'model' objects the code creates, and create and keep a map of these. I may also get it to store other information in the future. I plan to have another two similar classes for this sort of control, but I will orchestrate when and how this happens, and what to do with the returned data via a pure controller class. This splitting up control between informed managers and the controller, as opposed to operating just through a controller seems like it will simplify my code and make it flow more. My question is, is this a dangerous choice, in terms of making the code harder to follow/test/fix? Is this somethign established as good or bad or neutral? I oculdn't find anything similar except the idea of Actors but that's not quite why I'm trying to do. Edit: Perhaps an example is needed; I'm using the Controller to update the view and access the data, so when I click the 'Add new character to a player button' it'll call methods in the controller that then go and tell the PlayerCharacterManager class to create a new character instance, it'll call the PlayerManager class to add that new character to the player-character map, and then it'll add this information to the database, and tell the view to update any GUIs effected. That is the sort of 'control sequence' I'm hoping to create with these manager classes.

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  • How hard is to be the anonymous owner of a website?

    - by silla
    I'd like to create a website with a very radical political message. It won't be unethical (encouraging violence, etc) but I feel the points I plan to list in it will definitely make me a lot of enemies. How hard would it be to protect my identity from anyone finding out who I am? I know domains always have a $10/year option for privatizing your registration information but is there any other protection I should think about having? Thanks!

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  • Should if statments be in inner or outer method?

    - by mjcopple
    Which of these designs is better? What are the pros and cons of each? Which one would you use? Any other suggestions of how to deal with methods like is are appreciated. It is reasonable to assume that Draw() is the only place that the other draw methods are called from. This needs to expand to many more Draw* methods and Show* properties, not just the three shown here. public void Draw() { if (ShowAxis) { DrawAxis(); } if (ShowLegend) { DrawLegend(); } if (ShowPoints && Points.Count > 0) { DrawPoints(); } } private void DrawAxis() { // Draw things. } private void DrawLegend() { // Draw things. } private void DrawPoints() { // Draw things. } Or public void Draw() { DrawAxis(); DrawLegend(); DrawPoints(); } private void DrawAxis() { if (!ShowAxis) { return; } // Draw things. } private void DrawLegend() { if (!ShowLegend) { return; } // Draw things. } private void DrawPoints() { if (!ShowPoints || Points.Count <= 0)) { return; } // Draw things. }

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  • Want to Optimize Your Own Site? Then SEO Classes Are the Answer

    If you have decided to learn search engine optimization because you would like your website to gain higher ranking by adding targeted keywords then the best way to do this would be to attend SEO classes online. This way you won't have to pay professional SEO companies as you will be capable of setting up your own business in no time one you have completed your training.

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  • How to give anonymous access to site in IIS ?

    - by Lalit
    Hi, I want to give the anonymous access to my deployed site on IIS. i checked in Directory Security by right clicking on site in IIS there is checked the box Enable Anonymous access.also there is user IUSR_MySERVER is there. but still it is asking for user name & pwd. why. I don't want to ask any uname and pwd when site accessing. What to do? please help. I fact my application is, i am importing the Excel sheet from file location in my applicatiom. When i saying browse it run perfect . But when i say Import , it asking for the username and password. on Click of Import button I am reading Excelsheet in datatable by interop services. What should this problem should be?

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  • How to merge or copy anonymous session data into user data when user logs in?

    - by benhoyt
    This is a general question, or perhaps a request for pointers to other open source projects to look at: I'm wondering how people merge an anonymous user's session data into the authenticated user data when a user logs in. For example, someone is browsing around your websites saving various items as favourites. He's not logged in, so they're saved to an anonymous user's data. Then he logs in, and we need to merge all that data into their (possibly existing) user data. Is this done different ways in an ad-hoc fashion for different applications? Or are there some best practices or other projects people can direct me to?

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  • Can I force the auto-generated Linq-to-SQL classes to use an OUTER JOIN?

    - by Gary McGill
    Let's say I have an Order table which has a FirstSalesPersonId field and a SecondSalesPersonId field. Both of these are foreign keys that reference the SalesPerson table. For any given order, either one or two salespersons may be credited with the order. In other words, FirstSalesPersonId can never be NULL, but SecondSalesPersonId can be NULL. When I drop my Order and SalesPerson tables onto the "Linq to SQL Classes" design surface, the class builder spots the two FK relationships from the Order table to the SalesPerson table, and so the generated Order class has a SalesPerson field and a SalesPerson1 field (which I can rename to SalesPerson1 and SalesPerson2 to avoid confusion). Because I always want to have the salesperson data available whenever I process an order, I am using DataLoadOptions.LoadWith to specify that the two salesperson fields are populated when the order instance is populated, as follows: dataLoadOptions.LoadWith<Order>(o => o.SalesPerson1); dataLoadOptions.LoadWith<Order>(o => o.SalesPerson2); The problem I'm having is that Linq to SQL is using something like the following SQL to load an order: SELECT ... FROM Order O INNER JOIN SalesPerson SP1 ON SP1.salesPersonId = O.firstSalesPersonId INNER JOIN SalesPerson SP2 ON SP2.salesPersonId = O.secondSalesPersonId This would make sense if there were always two salesperson records, but because there is sometimes no second salesperson (secondSalesPersonId is NULL), the INNER JOIN causes the query to return no records in that case. What I effectively want here is to change the second INNER JOIN into a LEFT OUTER JOIN. Is there a way to do that through the UI for the class generator? If not, how else can I achieve this? (Note that because I'm using the generated classes almost exclusively, I'd rather not have something tacked on the side for this one case if I can avoid it).

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  • Code structure for multiple applications with a common core

    - by Azrael Seraphin
    I want to create two applications that will have a lot of common functionality. Basically, one system is a more advanced version of the other system. Let's call them Simple and Advanced. The Advanced system will add to, extend, alter and sometimes replace the functionality of the Simple system. For instance, the Advanced system will add new classes, add properties and methods to existing Simple classes, change the behavior of classes, etc. Initially I was thinking that the Advanced classes simply inherited from the Simple classes but I can see the functionality diverging quite significantly as development progresses, even while maintaining a core base functionality. For instance, the Simple system might have a Project class with a Sponsor property whereas the Advanced system has a list of Project.Sponsors. It seems poor practice to inherit from a class and then hide, alter or throw away significant parts of its features. An alternative is just to run two separate code bases and copy the common code between them but that seems inefficient, archaic and fraught with peril. Surely we have moved beyond the days of "copy-and-paste inheritance". Another way to structure it would be to use partial classes and have three projects: Core which has the common functionality, Simple which extends the Core partial classes for the simple system, and Advanced which also extends the Core partial classes for the advanced system. Plus having three test projects as well for each system. This seems like a cleaner approach. What would be the best way to structure the solution/projects/code to create two versions of a similar system? Let's say I later want to create a third system called Extreme, largely based on the Advanced system. Do I then create an AdvancedCore project which both Advanced and Extreme extend using partial classes? Is there a better way to do this? If it matters, this is likely to be a C#/MVC system but I'd be happy to do this in any language/framework that is suitable.

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  • What common interface would be appropriate for these game object classes?

    - by Jefffrey
    Question A component based system's goal is to solve the problems that derives from inheritance: for example the fact that some parts of the code (that are called components) are reused by very different classes that, hypothetically, would lie in a very different branch of the inheritance tree. That's a very nice concept, but I've found out that CBS is often hard to accomplish without using ugly hacks. Implementations of this system are often far from clean. But I don't want to discuss this any further. My question is: how can I solve the same problems a CBS try to solve with a very clean interface? (possibly with examples, there are a lot of abstract talks about the "perfect" design already). Context Here's an example I was going for before realizing I was just reinventing inheritance again: class Human { public: Position position; Movement movement; Sprite sprite; // other human specific components }; class Zombie { Position position; Movement movement; Sprite sprite; // other zombie specific components }; After writing that I realized I needed an interface, otherwise I would have needed N containers for N different types of objects (or to use boost::variant to gather them all together). So I've thought of polymorphism (move what systems do in a CBS design into class specific functions): class Entity { public: virtual void on_event(Event) {} // not pure virtual on purpose virtual void on_update(World) {} virtual void on_draw(Window) {} }; class Human : public Entity { private: Position position; Movement movement; Sprite sprite; public: virtual void on_event(Event) { ... } virtual void on_update(World) { ... } virtual void on_draw(Window) { ... } }; class Zombie : public Entity { private: Position position; Movement movement; Sprite sprite; public: virtual void on_event(Event) { ... } virtual void on_update(World) { ... } virtual void on_draw(Window) { ... } }; Which was nice, except for the fact that now the outside world would not even be able to know where a Human is positioned (it does not have access to its position member). That would be useful to track the player position for collision detection or if on_update the Zombie would want to track down its nearest human to move towards him. So I added const Position& get_position() const; to both the Zombie and Human classes. And then I realized that both functionality were shared, so it should have gone to the common base class: Entity. Do you notice anything? Yes, with that methodology I would have a god Entity class full of common functionality (which is the thing I was trying to avoid in the first place). Meaning of "hacks" in the implementation I'm referring to I'm talking about the implementations that defines Entities as simple IDs to which components are dynamically attached. Their implementation can vary from C-stylish: int last_id; Position* positions[MAX_ENTITIES]; Movement* movements[MAX_ENTITIES]; Where positions[i], movements[i], component[i], ... make up the entity. Or to more C++-style: int last_id; std::map<int, Position> positions; std::map<int, Movement> movements; From which systems can detect if an entity/id can have attached components.

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  • How can I allow anonymous access to OTRS FAQ area?

    - by robbie
    I have been searching for this for quite some time now. I am using OTRS 2.4.7 and installed the FAQ package version 1.6.5. Everything seems to work fine. When I am logged in, I can create articles and other users have the ability to browse the articles. I want to be able to allow access to any anonymous non-user to be able to read these articles. Can anyone shed some light on how to allow this type of access? Thanks

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  • How can I share a Windows 7 library with anonymous access without using a Homegroup?

    - by Triynko
    The "homegroup" feature is useless, because it requires a password, and therefore doesn't support anonymous, no-hassle access to shares from devices such as my Sony Bravia TV and non-Windows7 machines. So I turned off homegroup and reverted to the standard shared folders protocol. I'd like to share my Music "Library", so I can play files from my TV through the Surround Sound System, but there seems to be no option to share a library folder other than through a homegroup. I don't want to have to individually share the folders that belong to the library, because that would defeat the purposes of the library, which is to manage which folders are included in the library while also providing an easily accessible view of them all at once. Does anyone know how to share a Windows 7 library without that useless homegroup feature?

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  • How can I share a Windows 7 library with anonymous access without using a Homegroup?

    - by Triynko
    The "homegroup" feature is useless, because it requires a password, and therefore doesn't support anonymous, no-hassle access to shares from devices such as my Sony Bravia TV and non-Windows7 machines. So I turned off homegroup and reverted to the standard shared folders protocol. I'd like to share my Music "Library", so I can play files from my TV through the Surround Sound System, but there seems to be no option to share a library folder other than through a homegroup. I don't want to have to individually share the folders that belong to the library, because that would defeat the purposes of the library, which is to manage which folders are included in the library while also providing an easily accessible view of them all at once. Does anyone know how to share a Windows 7 library without that useless homegroup feature?

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  • How can I allow anonymous access to OTRS FAQ area?

    - by robbie
    I have been searching for this for quite some time now. I am using OTRS 2.4.7 and installed the FAQ package version 1.6.5. Everything seems to work fine. When I am logged in, I can create articles and other users have the ability to browse the articles. I want to be able to allow access to any anonymous non-user to be able to read these articles. Can anyone shed some light on how to allow this type of access? Thanks

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  • How can I use a computer as a router and send all client traffic through anonymous proxies?

    - by Terrapin
    Is there a way that I can setup a spare box as a router on my network, and route client traffic through a proxy in order to hide my location? Specifically, I would like internet traffic to/from my Roku Box to be routed via proxy, but there is no proxy support built in to the Roku. So I would like wire my Roku directly my computer's second NIC, and force all traffic through a proxy. What kind of software and hardware setup will I need? Also, which anonymous proxy service are best for this purpose? I'm not interesting in full anonymity or encryption. I simply want to mask my location while providing the best possible throughput.

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  • I'm trying to set up a LAMP server so it's totally anonymous, any suggestions?

    - by flexterra
    I'm going to set up a web service which will use the LAMP stack. One of the most important features of the site is that it should be anonymous. We thought that a cool thing will be if the server didn't made any logs that could potentially identify a user. I'm working on a web app for a news organization. They want a site to allow people to sumbit news leads and tips (text / files) to journalists. We think if we can provide good anonymity people will be more inclined to provide information. We will also teach how to use stuff like TOR as an extra precaution for whistleblowers Is this even possible? Any suggestions of obscure things we should look into?

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  • How can I enable true anonymous/everyone access to a Window share?

    - by Matthew Read
    I recently discovered that turning off "password protected sharing" in Windows 7 requires having the guest account enabled, named as such, and with a blank password. While Windows seems to automatically attempt to use guest when connecting, Ubuntu does not, requiring anyone trying to access my share to know to use guest and a blank password. I really don't want to have the guest account enabled, either. So is there a way to allow true anonymous access to a Windows share that doesn't require credentials? Or a way to allow any credentials at all?

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  • Always importing too many classes... I think!

    - by Bill
    I have a basic problem with knowing which classes to import for a given application, renderer, AS package, mxml component, etc. There seems to be hundreds of classes (both mx and flash) and I'm never sure which one(s) to import... so I just keep adding import statements until the errors go away. Is there a reference somewhere that I don't know about? Or does this just come with experience? Also... does importing a load of classes actually make the file size larger or does Flex only import the classes used nregardless of what I specify? If it only uses what is needed, why wouldn't everyone just do: import mx.*;

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  • How do game programmers design their classes to reuse in AI, network and play and pass mode?

    - by Amogh Talpallikar
    For a two player game where, your opponent could be on the network, CPU itself or near you where you would play turn by turn on the same machine. How do people design classes for re-use ? I am in a similar situation and have no experience in making such complex games. But here is what I have thought, If I am a player object , I should only be interacting with the GameManager or GameEngine Singleton , from which I will get various notifications about the game status. I dont care where and who my opponent is, this GameManager depending upon the game mode, will interact with gameNetworkManager , or AI tell me what the opponent played. I am not sure about the scenario where we play and pass [turn by turn on same machine]. Hoping for a brief but clear explanation or at least a link to a similar resource.:)

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