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  • Trouble with abstract generic methods

    - by DanM
    Let's say I have a class library that defines a couple entity interfaces: public interface ISomeEntity { /* ... */ } public interface ISomeOtherEntity { /* ... */ } This library also defines an IRepository interface: public interface IRepository<TEntity> { /* ... */ } And finally, the library has an abstract class called RepositorySourceBase (see below), which the main project needs to implement. The goal of this class is to allow the base class to grab new Repository objects at runtime. Because certain repositories are needed (in this example a repository for ISomeEntity and ISomeOtherEntity), I'm trying to write generic overloads of the GetNew<TEntity>() method. The following implementation doesn't compile (the second GetNew() method gets flagged as "already defined" even though the where clause is different), but it gets at what I'm trying to accomplish: public abstract class RepositorySourceBase // This doesn't work! { public abstract Repository<TEntity> GetNew<TEntity>() where TEntity : SomeEntity; public abstract Repository<TEntity> GetNew<TEntity>() where TEntity : SomeOtherEntity; } The intended usage of this class would be something like this: public class RepositorySourceTester { public RepositorySourceTester(RepositorySourceBase repositorySource) { var someRepository = repositorySource.GetNew<ISomeEntity>(); var someOtherRepository = repositorySource.GetNew<ISomeOtherEntity>(); } } Meanwhile, over in my main project (which references the library project), I have implementations of ISomeEntity and ISomeOtherEntity: public class SomeEntity : ISomeEntity { /* ... */ } public class SomeOtherEntity : ISomeOtherEntity { /* ... */ } The main project also has an implementation for IRepository<TEntity>: public class Repository<TEntity> : IRepository<TEntity> { public Repository(string message) { } } And most importantly, it has an implementation of the abstract RepositorySourceBase: public class RepositorySource : RepositorySourceBase { public override Repository<SomeEntity> GetNew() { return new Repository<SomeEntity>("stuff only I know"); } public override Repository<SomeOtherEntity> GetNew() { return new Repository<SomeOtherEntity>("other stuff only I know"); } } Just as with RepositorySourceBase, the second GetNew() method gets flagged as "already defined". So, C# basically think I'm repeating the same method because there's no way to distinguish the methods from parameters, but if you look at my usage example, it seems like I should be able to distinguish which GetNew() I want from the generic type parameter, e.g, <ISomeEntity> or <ISomeOtherEntity>. What do I need to do to get this to work?

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  • Does Core Data automatically validate new values when they are set?

    - by mystify
    In this question, someone asked how to write a validation method for Core Data. I did that, and it looks cool. But one thing doesn't happen: The validation. I can easily set any "bad" value and this method doesn't get called automatically. What's the concept behind this? Must I always first call the validation method before setting any value? So would I write setter methods which call the appropriate validation method first? And if yes, what's the point of following a strict convention in how to write the validation method signature? I guess there's also some automatic way of validation, then. How to activate this?

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  • Java Swing - good idea?

    - by Mike
    hi, simple question : I need to write cross platform application (basically CRUD). Is usage of Java Swing good idea? Or is it out-dated and you know better solution? I dont want to use like 5 languages for various stuff, one or two should be enough. Thanx!

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  • How to gather arbitrary length list data in ASP.NET MVC.

    - by C. Ross
    I need to gather a list of items associated with another item from my user in a ASP.NET MVC project. I would like to have a controller action like bellow. [AcceptVerbs(HttpVerbs.Post)] public ActionResult Create(int x, int y, IEnumerable<int> zKeys) { //Do stuff here } How can I setup my form to pass data in this way? If data of this particular form can't be provided, what's the next best way to pass this type of information in ASP.NET MVC?

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  • Question about implement air widget manager

    - by L.J.W
    Hi all, I have a question about invoking air in air,please give me some advice. I want to use air technology in enterprise business,and I think widget manager(engine) like google desktop,vista sidebar is a good system entrypoint.so I look for a widget manager basing AIR,the widget manager can load air widget, and auto upgrade widget silently ,and have a cool user-interface like google desktop or vista sidebar or yahoo's. Any product existed and recommend?and if I need to implement myself,any idea or advice?How can I embed the widget interface into the manager(engine) interface seamless,how can I invoke the specified window(maybe not the init window) in the widget air application from the manager? Thanks and best regards

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  • Creating websites: Code by hand or use a visual editor?

    - by Peak
    What is currently the best way to code a (semi complicated) website that uses html, css, javascript and some server stuff (php?)? Would you code most of it by hand, use a visual editor for certains parts, are there standard quality editors nowadays? How do web developers go about doing this?

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  • Adding C++ DLL's to a C# project

    - by WebDevHobo
    I'm trying to use the lame_enc.dll file from LAME in a C# project, but adding the thing seems impossible. I keep getting an error that says that a reference could not be added and to please check if the is accessible, a valid assembly or COM component. I have no C++ experience, though I would like to use the functionality. Right now I'm using Process from the .NET framework to call lame.exe and do stuff, but I'd like to know if there's another way.

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  • Script-Based Configuration in .net?

    - by Michael Stum
    One of the downsides of web.config/app.config is that it's just Magic Strings everywhere, since it's just an XML file. Interpreted languages like PHP or Ruby have the advantage that the configuration is just code that is executed. In .net, doing stuff in code requires a redeployment, which defeats the purpose. Now, before I build my own web.config replacement based on Boo or PowerShell I wanted to know if there is an existing one?

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  • What Wordpress plugin is this one?

    - by Favio
    Hello, I'm having trouble identifying a plugin (or perhaps is not even a plugin), but can you tell me what plugin outputs the section at the bottom of the post that has the headers: "Did you like this article?" and "Related Posts", and has a list of bookmarking links, and a list of posts respectively. Image of the stuff I'm referring to: Example URL: http://www.escapefromcorporate.com/networking-tools-and-help-upmo/ Thanks!

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  • Is it possible to route heroku-rails-app to a subdirectory of my custom domain?

    - by ernd enson
    I want to setup a rails app on heroku that is part of a website. The website which is hosted on a different server explains the usage of the app, shows a tour, plans, contains a blog on related stuff and so on. I want to route to my_domain/app and the app should respond to that url. The custom_domain add-on doesnt allow to enter directories. How can I configure that or how would you realize that scenario?

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  • Does it make any sense to develop for iPhone OS 3.0 instead of 3.2?

    - by mystify
    When it comes to backwards-compatibility, I want to stick to iPhone OS 3.0 so also some of the poor iPod Touch users who aren't rich enough for iPhones use my apps. But iPhone OS 3.2 has some pretty cool features that would be nice to have. Problematic thing: Since it's just a minor upgrade, I can imagine most iPod Touch users who decided to upgrade to 3.0 probably never upgraded to 3.2. I'm not sure if Apple actually asked them to pay like 10 bucks for going from 3.0 to 3.2. However, if Apple did ask them for money, I'm sure like 90% of all iPod Touch users didn't upgrade. So the big question is: IF you decide to go with iPhone OS 3.0, is it a stupid idea to stick to 3.2 just because of a few more features? Will this effectively kill half of your iPod Touch userbase?

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  • php+jquery+captcha, is this is the correct way?

    - by user354051
    I am using combination of php+jQuery for captcha validation and later sending mails and do other stuff. The pseudo code is something like this: captcha_code = jQuery.post(.....execute captcha script and get status) if(captcha_code == "correct"){ send_mail_using_php_script; } Now I have no idea whether spammers can directly execute the "send_mail_using_php_script". Do they? If yes, then shall I move captcha validation in send_mail_using_php_script to make it more safer? Is there any other safer method? Prashant

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  • changing existing duplicate entries in mysql

    - by Mladen
    sorry for the (probably) noob question, but I', new at this stuff. i have a table that has column 'position', and I want to, when inserting a new row, change positions of every row that has position lower than row that is inserted. for example, if I add row with position 4, if there is a duplicate, it should become 5, 5 should shift to 6 and so on... also, is there a way to get highest value for column besides testing it in every row via php?

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  • Best way to use Cradle with Express.js (CouchDB, Node.js)

    - by Costa
    I'm building my website ( http://tedxgramercy.jit.su ) with express.js and so far I've been using the http.request method in node to access couch, and that's been cool. I've learned lots about how http, couch, and node work, which is awesome. Anyways, I'm thinking of moving over to cradle now (Let me know if you have a strong opinion about this) and I'd like to know the "right" way to set this up. Should I... require() cradle and make a new connection to my db in each separate route? create my database connection once, and then just pass that connection by require()ing the connection in each route? (if so, how do I do that?) Thanks!!!

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  • CSS: How to make a Div of text underneath another Div selectable?

    - by jesse
    Hi, I have a few empty Divs on a page that are basically empty boxes to help me position some stuff to make a "liquid" website. Now I've got content underneath these Divs but I can't highlight/click on the links because these empty Divs are blocking it. I've got a reason I need to have the empty Divs to be on the top layer so I need a way to "click through" these Divs. What can I do? Thanks.

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  • What is the best solution for remote desktop / visual support?

    - by SchizoDuckie
    We are currently investigating different remote-desktop support solutions to help our clients if they have any problems with our software and I would like some input on the best solutions out there. We have the following needs / wishes: Cross platform Preferrably no installation on the user-end Should penetrate firewalls and not be bothered by antivirus stuff. Should leave no residu behind after support. I know of VNC, logmeinrescue.com, dameware remote control, msn remote desktop and many others, but which one is the best?

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  • PHP Multiple form tokens

    - by Juddling
    I understand the idea of generating a form token and storing it in a session, and also putting it as a hidden input in my forms. But how could I make this work if I have pages with multiple forms, is it still safe to use the same token for each form? And I still feel weary about bots and stuff on my website, can these form tokens really safely replace CAPTCHAs?

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  • Javascript !something && function()

    - by cpf
    Hi Stackoverflow, I have been looking at the source code of raphael (http://raphaeljs.com/index.html) and I see a lot of stuff like !variable && function() (e.g.: !svg.bottom && (svg.bottom = this); ) What does that exactly do? Does it check first and execute only if not true? Thanks.

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  • C++ IDE for OSX

    - by gprime
    When i was at university i wrote a lot of C++. I primarily used either Visual Studio (at the time it was version 6) or VIM (if i was on linux) as an editor to write my code. Since i have graduate and have been working primarily in web programming i have stopped writing C++. Since i graduated i have also bought myself and started using my Mac exclusively. I am now starting to get back to my C++ coding (just for fun) and would like an opinion on good IDE's for Mac. I am currently using xCode which seems kinda cool because it has everything built into it. Do any of you have any other IDE's that you would suggest that i give a shot or should i just stick to xCode?

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  • unix DECLARE_WAIT_QUEUE_HEAD (var) var prototype?

    - by yoavstr
    hello i want to work with 2 queue in the module where i change my pointer to them therefore i need to use : //declartion wait_queue_head_t **currentQ; DECLARE_WAIT_QUEUE_HEAD (readWaitQ1); DECLARE_WAIT_QUEUE_HEAD (readWaitQ2); if(condition){ currentQ = &readWaitQ1; }else{ currentQ = &readWaitQ2; } but i get incorrect type for wake_up an other stuff using the queue. even thought i google it i couldnt find an answer can someone just give me the prototype needed?...

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  • What's the advantage of an Adobe AIR app over a traditional desktop app?

    - by John
    I'm pretty familiar with using Adobe Flex & AS3, and compared with writing apps in JS/HTML I think it's very cool. However, since AIR is essentially a non-browser version of Flex with benefits like local storage, it seems to be competing as a cross-platform desktop application platform... and in that space it's much less mature than more established desktop technologies. So what's the advantage of creating a desktop application using AIR compared to something like Java (or C++ using a cross-platform GUI library like wxWidgets)? Java's equally capable of communicating with the server for instance, I'm not quite sure what AIR adds when competing head-to-head in the desktop development world?

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  • Copy and paste RESULTS of a file search

    - by ray023
    In order for me to get the results of a file search in a readable format, I use the following command line in a command prompt: dir *.* /s > myResultList.txt I then open that list in Excel, use fixed width format to get rid of all the stuff I don't want and then I have my list. Seems like a lot to do for something so simple. Does anyone out there have any recommendations for something that would work better than this?

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