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• Help with Linked Server Error

  - by Randy Minder

  In SSMS 2008, I am trying to execute a stored procedure in a database on another server. The call looks something like the following: EXEC [RemoteServer].Database.Schema.StoredProcedureName @param1, @param2 The linked server is set up correctly, and has both RPC and RPC OUT set to true. Security on the linked server is set to Be made using the login's current security context. When I attempt to execute the stored procedure, I get the following error: Msg 18483, Level 14, State 1, Line 1 Could not connect to server 'RemoteServer' because '' is not defined as a remote login at the server. Verify that you have specified the correct login name. I am connected to the local server using Windows Authentication. Anyone know why I would be getting this error?

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• How to make an existing socket fail?

  - by Huckphin

  OK. So, this is exactly the opposite of what everyone asks about in network programming. Usually, people ask how to make a broken socket work. I, on the other hand am looking for the opposite. I currently have sockets working fine, and want them to break to re-create this problem we are seeing. I am not sure how to go about intentionally making the socket fail by having a bad read. The trick is this: The socket needs to be a working, established connection, and then it must fail for whatever reason. I'm writing this in C and the drivers are running on a Linux system. The sockets are handled by a non-IP Level 3 protocol in Linux by a Linux Device Driver. I have full access to all of the code-base, I just need to find a way to tease it out so that it can fail. Any ideas?

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• Getting Line Numbers for Errors Thrown in SQL Server CLR Runtime

  - by fetucine53

  Hi all, I've created a CLR stored procedure that I'm running on SQL 2k5 and I'm wondering if there's any way to get line numbers for exceptions thrown by the .NET code. When an Exception is thrown, I get something along the lines of Msg 6522, Level 16, State 1, Procedure myProcedure, Line 0 A .NET Framework error occurred during execution of user-defined routine or aggregate "myProcedure": System.Exception: testing exception System.Exception: at DummyDLL.myProcedure (String dummyInput) . Is there some way I can load the assembly to give me specific line numbers rather than just the function in which the error was thrown? The assembly itself was compiled with a .pdb, but SQL 2k5 doesn't appear to be reading it in when I load the assembly initially. Thanks!

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• algorithm for image comparison

  - by Rajnikant

  Please consider following use case, I have one bigger image, lets called is master image. Now from some where else, I am getting one small image. I want to check whether this small image is subset of master image or not. important points are, smaller image might have different file format, smaller image might captured from comparatively different view. smaller image may have different light intensity. At this stage of algorithm/computation advancement, which level of accuracy I could expect? Any algorithm/open source implementation that would have such implementation? Thanks, Rajnikant

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• iPhone SDK: CLocationAccuracy. What constants map to what positioning technology?

  - by buzzappsoftware

  With respect to CLocationManager docs.... Constant values you can use to specify the accuracy of a location. extern const CLLocationAccuracy kCLLocationAccuracyBestForNavigation; extern const CLLocationAccuracy kCLLocationAccuracyBest; extern const CLLocationAccuracy kCLLocationAccuracyNearestTenMeters; extern const CLLocationAccuracy kCLLocationAccuracyHundredMeters; extern const CLLocationAccuracy kCLLocationAccuracyKilometer; extern const CLLocationAccuracy kCLLocationAccuracyThreeKilometers; Given that, I have the following questions. What triangulation method (GPS, cell tower or wi-fi) corresponds to each accuracy level? Does iPhone SDK utilize Skyhook Wireless API? For kCLLocationAccuracyBestForNavigation, there is note stating the phone must be plugged in. Is this enforced or is it just warning the developer the battery is likely to drain quick from using the GPS receiver. Thanks in advance.

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• Virtual Earth Shape Rendering Performance

  - by Mike

  I am overlaying a transparent image on my VEMap control by rendering it as a single VEShape. The shape changes sizes dynamically depeding on the zoom level of my map and can be as large as 4000*4000px. In older browsers such as IE6 and early versions of Firefox 2.x, map control performance degrades rapidly when my shape gets larger than 1500*1500px. The mouse pointer moves slowly and the map responds very slowly to events. I don't see this issue at all in newer browsers (IE7+). Are there any workarounds to boost performance of rendering a large shape for IE6 users?

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• What features are important in a programming language for young beginners?

  - by NoMoreZealots

  I was talking with some of the mentors in a local robotics competition for 7th and 8th level kids. The robot was using PBASIC and the parallax Basic Stamp. One of the major issues was this was short term project that required building the robot, teaching them to program in PBASIC and having them program the robot. All in only 2 hours or so a week over a couple months. PBASIC is kinda nice in that it has built in features to do everything, but information overload is possible to due this. My thought are simplicity is key. When you have kids struggling to grasp: if X>10 then <DOSOMETHING> There is not much point in throwing "proper" object oriented programming at them. What are the essentials needed to foster an interest in programming?

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• Lua API for TokyoTyrant

  - by jideel

  Hi SO folks, I didn't managed to find an Lua client/api for TokyoTyrant. Such Api exists for TokyoCabinet, but not for TT. And Perl and Ruby API exists for TT. TT provides a native binary protocol, a memcached-compatible protocol, and an HTTP-oriented protocol. So my questions are : 1/ Do you think using the memcached (using luamemcached) or the HTTP protocol (using luaSocket) is "enough" for most / simple usage, and so a native Lua api is not necessary ? (the app is a simple uuid storage/distributor) ? 2/ Does it make sense to not use TokyoTyrant, but only TokyoCabinet, and use Lua at the application level to provide network and concurrent access to TC, using, say, Copas (Copas is , from their website, "a dispatcher based on coroutines that can be used by TCP/IP servers." ? Thanks.

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• [Newbie] How to join mysql tables

  - by Ivan

  I've an old table like this: user> id | name | address | comments And now I've to create an "alias" table to allow some users to have an alias name for some reasons. I've created a new table 'user_alias' like this: user_alias> name | user But now I have a problem due my poor SQL level... How to join both tables to generate something like this: 1 | my_name | my_address | my_comments 1 | my_alias | my_address | my_comments 2 | other_name | other_address | other_comments I mean, I want to make a "SELECT..." query that returns in the same format as the "user" table ALL users and ALL alias.. Something like this: SELECT user.* FROM user LEFT JOIN user_alias ON `user`=`id` but it doesn't work for me..

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• Difference between Document-oriented-DB and Bigtable clones

  - by chen

  We are looking for a suitable storage engine for our weblog history data. We looked at Bigtable's paper and understand it is suitable to us well. However, I also understand that Document-oriented-DB such as MongoDB seems to provide a little more powerful schema power -- i.e, it can model our data as well. I wonder how nowadays ppl choose a scalable NoSQL DB --- I read enough articles like "we looked at A, B and C, and we decided to use C". But I'd like to see some benchmark number. What I am saying is that if MongoDB and the like can provide same level of performance as Bigtable clones, why don't web companies choose it (preparing to deal with various potentially more complex data problem)? Thanks, By the way, I read an article (which convinced me at the moment) saying Cassandra does not fit the M/R operation, any comments?

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• Securing Files over Web: Fine Grained Authorization Based File Access

  - by Nishant

  I have a system where employees can upload files. There are three ways Upload to my account in public, private or protected mode Upload to department account in public, private or protected mode Upload to organization account in public, private or protected mode where public is visible to anyone, private to the group or person only and protected to anyone in the organization. All the files for an organization are stored in a directory say, /files/<organizationId>/, on file server like files +-- 234809 | +img1.jpg | +doc1.pdf +-- 808234 | +doc2.pdf I am storing file-path and privacy level in DB. So, I can control whether to show link to a file URL to an user -- on a given page. The problem is, I do not have any control over file's URL... so, if some one types the URL to img1.jpg in his browser's address bar, there is no way to know whether a logged in user is eligible to see img1.jpg. Any suggestion? Thanks Nishant

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• Tutorials for C# database app

  - by ChrisC

  My question and comments here http://stackoverflow.com/questions/2471198/what-is-ado-net shows my level of knowledge about c# database apps. Can someone point me to tutorials and/or primers that can help me proceed from where I am (also stated in other question)? I've looked and all I've found are tutorials that talk about general db basics (ie, not helping with VS/C#), or talk about connecting to existing SQL db's. I need help setting one up and configuring it, as well as help on how to create and use queries to test the db schema.

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• error with Security Exception

  - by Alexander

  I am getting the following error on my page: Security Exception Description: The application attempted to perform an operation not allowed by the security policy. To grant this application the required permission please contact your system administrator or change the application's trust level in the configuration file. The problem is with the following code SmtpClient mailClient = new SmtpClient("smtp.gmail.com", 587); What's weird is that when testing it at my localhost, everything works fine, but when I put it on my 1and1 web host it generates the error above. I contacted their support and here's their answer. We do check the error logs and the operation require a FullTrust environment which currently fall under restriction on .NET Framewor k What should I do?

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• Good books on Sybase ASE 15?

  - by Ilya Kochetov

  We need to get some good books on Sybase ASE 15 for our developers. The people in the team have previous experience with different SQL flavors (MS SQL, MySQL, Informix and Oracle) but no one worked with Sybase before. Therefore I am looking for two kinds of books: Book for developers on how to use Sybase for queries,sprocs, views etc. Has to be a book for professionals and not something like 'learn SQL in 21 day' Book for the DB administrator on how to maintain the database. This could be on any level and a dummy guide would not go wrong :) Thank you

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• Dataset field DBNull -> int?

  - by BobClegg

  SQLServer int field. Value sometimes null. DataAdapter fills dataset OK and can display data in DatagridView OK. When trying to retrieve the data programmatically from the dataset the Dataset field retrieval code throws a StronglyTypedException error. [global::System.Diagnostics.DebuggerNonUserCodeAttribute()] public int curr_reading { get { try { return ((int)(this[this.tableHistory.curr_readingColumn])); } catch (global::System.InvalidCastException e) { throw new global::System.Data.StrongTypingException("The value for column \'curr_reading\' in table \'History\' is DBNull.", e); } Got past this by checking for DBNull in the get accessor and returning null but... When the dataset structure is modified (Still developing) my changes (unsurprisingly) are gone. What is the best way to handle this situation? It seems I am stuck with dealing with it at the dataset level. Is there some sort of attribute that can tell the auto code generator to leave the changes in place?

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• Why darcs instead of git?

  - by Ctrl Alt D-1337

  Using pure functional languages can have a lot of benefits over using impure imperatives but low level systems languages will generally allow you to achieve much greater performance especially when they are imperative because it allows you to specify the exact steps in how the cpu should compute the result. If there is ever list of tools where high performance is an absolute must then I would put source version controls systems right at the top of that list and git achieves this very well but performance is not it's only advantage over many other other types of version control systems anyway. The git team are handling the unsafe c code very well and I never worry about my type system or any other features of the language it is written in so why is it that there is a lot of haskell developers that must use darcs when they will only be using the finished product?

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• In Drupal 6, is there a way to take a custom field from the latest post to a taxonomy term, and disp

  - by user278457

  The title for this question pretty much sums up what I'm asking. I've got a list of taxonomy terms, and I'm using a view to display the latest post to each one. I'd like to also display a custom field set up in CCK just under this. Currently, I'm just using "date updated" of the taxonomy term itself which was easy to set up in views. I'd like to drill a little deeper and get the custom "event date" field I've added to the content type last posted to the taxonomy term I'm "viewing". I've got a feeling I'm going to have to write my own database query for this. If (I can avoid that){ How do I set up such a view? } Else{ What's the best practice for including lower level database queries alongside views? }

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• Has anyone got a simple step by step Mozilla plugin tutorial.

  - by s1mm0t

  I'm trying to create a Mozilla browser plugin for the sole purpose of detecting with javascript whether or not an application that I have written is installed. This was inspired by another stackoverflow question and answer on a similar subject. All I want really is a HelloWorld type example as what I need to write will be even simpler than that. There is a lot of information on the Mozilla website, but as a plugin noob and a C++ novice I'm experiencing information overload. I just need a step by step "this is how to create your first simple plugin". I have already written the IE equivalent by following this ATL tutorial. This is the kind of level of guide that I would ideally like to find. Please note, this is specifically about Mozilla plugins and not extensions - Googling this subject brings up a lot of information about extensions in addition to plugins.

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• VB.net Edit-And-Continue: ignore "unable to apply this change while debugging"

  - by FastAl

  When using VB.Net (2008) and paused in debugging, Edit-And-Continue is a great time-saver. However if you change any module/class-level information (variable, sub/function signature, etc), you get the error message like this: "unable to apply this change while debugging" While I can understand the technical challenge to making this work (and why it would be hard), it leaves me in a tight spot with just a few options: 1) Restart and recompile and get the program back to the same state 2) Continue debugging without making the change, and risk forgetting 3) Type up a reminder note to make the change All of which are annoying. Now I know that option '4) Just actually make the change' may not be possible. but does anybody know how to enable the following 'technically easy' possibility? 4) Let me change the code, get it flagged with the purple squiggly underline, so I can save it, but just ignore the change until recompile I have checked the Tools|options|debug|edit and continue, nothing appears to let me do this. thanks!

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• mod_rewrite to find missing /img/foo.jpg in /img/f/

  - by Ambrose

  I've got a folder of images which is reaching a critical mass after a few years. I want to move images into alphabetical folders, so that /img/foo.jpg goes into /img/f/foo.jpg and /img/bar.jpg goes into /img/b/bar.jpg and so on. In order to make the transition smooth, and to allow the manual uploaders to put stuff into the top level, I'd like to use mod_rewrite to do this: if /img/foo.jpg exists, serve it up, if not look for it in /img/f/foo.jpg thanks for any suggestions. For the record, no, I don't think we need to go /img/f/fo/foo.jpg just yet.

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• how can i solve "The OLE DB provider "Microsoft.Jet.OLEDB.4.0" has not been registered."?

  - by Phsika

  i try to use get excel data from excel file. i am using office 2007 and sql 2005. i writed below codes: CREATE TABLE [dbo].[Addresses_Temp] ( [FirstName] VARCHAR(20), [LastName] VARCHAR(20), [Address] VARCHAR(50), [City] VARCHAR(30), [State] VARCHAR(2), [ZIP] VARCHAR(10) ) GO INSERT INTO [dbo].[Address_Temp] ( [FirstName], [LastName], [Address], [City], [State], [ZIP] ) SELECT [FirstName], [LastName], [Address], [City], [State], [ZIP] FROM OPENROWSET('Microsoft.Jet.OLEDB.4.0', 'Excel 8.0;Database=C:\Source\Addresses.xls;IMEX=1', 'SELECT * FROM [Sayfa1$]') Error:Msg 7403, Level 16, State 1, Line 2 The OLE DB provider "Microsoft.Jet.OLEDB.4.0" has not been registered. How can i solve it?

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• Objective-C syntax

  - by mebFace

  I've been studying objective-c for a few days now. I keep coming across these two structures: NSString * somestring (NSString *) somestring I understand the first simply sets a pointer to an NSString object, but what does the second construct do, and when should I use it? What's the deal with the asterix marks? Sorry if this question doesn't make any sense, I am completely new to this language, and haven't even reached the level of asking proper questions. Main purpose -- I'm trying to decipher this method: -(NSString *)pickerView:(UIPickerView *)pickerView titleForRow:(NSInteger) row forComponent: (NSInteger)component *Also, the classes I chose don't matter. *

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• How do I enumerate a list of interfaces that are directly defined on an inheriting class/interface?

  - by Jordan

  Given the following C# class: public class Foo : IEnumerable<int> { // implementation of Foo and all its inherited interfaces } I want a method like the following that doesn't fail on the assertions: public void SomeMethod() { // This doesn't work Type[] interfaces = typeof(Foo).GetInterfaces(); Debug.Assert(interfaces != null); Debug.Assert(interfaces.Length == 1); Debug.Assert(interfaces[0] == typeof(IEnumerable<int>)); } Can someone help by fixing this method so the assertions don't fail? Calling typeof(Foo).GetInterfaces() doesn't work because it returns the entire interface hierarchy (i.e. interfaces variable contains IEnumerable<int> and IEnumerable), not just the top level.

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• Embedded computer vision platforms

  - by Egon

  Hi folks, I am planning to start a computer vision based project on a smart phone platform. I know iPhone ( http://niw.at/articles/2009/03/14/using-opencv-on-iphone/en ) and Andriod ( http://github.com/billmccord/OpenCV-Android ) have openCV support. I am interested in knowing how was your experience with the level of integration, support and ease of building good apps on either platform. Also I do want to consider windows phone 7 ( and Zune) as a platform, Are there any Computer Vision libraries for that platform or any good development tools( does Aforgenet work or any other good suggestion) ? Also can you suggest some popular augmented reality apps which uses cutting edge technology ( I am aware of http://www.pranavmistry.com/projects/sixthsense/ ) Thnx in advance!

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• Terracotta With Hibernate and EHCache

  - by Joe Biron

  Head swimming with the product name soup at http://www.terracotta.org. Need someone to help clarify what I need. Background: app has some "legacy" persistence code that does not use Hibernate, but has a home-grown cache implementation. New entities are Hibernate enabled. What I want: to use Terracotta for Hibernate 2nd level cache. I think I then want to slide out the home-grown cache impl and slide in ehcache (very similar semantically to home-grown version) - obviously I want Terracotta to back that EHCache as well. Confused with: Will I be telling Hibernate that ehcache is it's cache provider, then configure ehcache to use terracotta? So (hibernate | legacy-persistence)- ehcache - terracotta Am I on the right track? Forgive the newb question but the terracotta.org site really confuses me since so much of it it trying to sell me the commercial varieties.

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