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• How can I prevent ADO from creating multiple SPIDs?

  - by stusmith

  I'm working on an application that creates a single ADO connection and keeps it open for the lifetime of the application. I have connection pooling turned off. (Please ignore the fact that this might not be best practice for the purposes of this question). If I spawn a new thread and use the exact same ADO connection, it uses a new SPID behind the scenes. Is there anyway to ensure an ADO connection always uses the same SPID, across all threads? (For reference the application is VC++ using ADO via COM to SQL Server).

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• Log4net 1.2.10 running on .NET 1.1 and 2.0 not compatible

  - by Daniel Williams

  I have old code that uses log4net version 1.2.10 targeted for the .NET 1.1 platform. My current code uses lognet version 1.2.10 targeted for the .NET 2.0 platform When I mix the old and new code all hell breaks loose. Code written today on .NET 4.0 and VS2010 can use the 2.0 log4net dll just fine. but if I put in the 1.1 version, it breaks. Conversely, the old dlls will break if I use the 2.0 log4net dll. I do not want to force my old dlls onto 2.0. Is there a good solution? I guess what bugs me most is that the log4net has the same version number, but I cannot fool my code and dlls into working with a single version.

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• Given a few strings, how many strings can be lexicographically least by modifying the alphabet?

  - by Jackson W

  Number of strings can be huge as in 30000. Given N strings, output which ones can be lexicographically least after modifying the english alphabet. e.g. acdbe...... for example if the strings were: omm moo mom ommnom "mom" is already lexicographically least with the original english alphabet. we can make the word "omm" least by switching "m" and "o" in the alphabet ("abcdefghijklonmpqrstuvwxyz"). the other ones you cant make lexicographically last, no matter what you do. any fast way to do this? I have no ways to approach this except try every single possible alphabet

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• How to create relationship mapping via Entity framework

  - by James

  I have following domain model: User { int Id; } City { int Id; } UserCity { int UserId, int CityId, dateTime StartDate } In the function where I have to attach a user to a city, the following code is working for me: UserCity uc = new UserCity(); //This is a db hit uc.User = MyEntityFrameworkDBContext.User.FirstOrDefault(u => u.ID == currentUserId); //this is a db hit uc.City = MyEntityFrameworkDBContext.City.FirstOrDefault(c => c.ID == currentCityId); uc.StartDate = userCityStartDate; //this is a db hit MyEntityFrameworkDBContext.SaveChanges(); Is there any way I can create relationships with just one single DB hit? The first two db hits are not required, actually.

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• Can I do everything in C that C++ and C# and Java can do?

  - by Sahat

  Is it possible to write in C programming language everything that you could write in other languages such as Java, C# or C++. If that's the case why don't schools these days teach C instead of Java? Ok the main reason why I am asking is because I don't want to tie down to a single programming language and platform (.NET and C# or Obj-C and Cocoa). Perhaps I am confusing a programming language with a framework? If anyone could clarify all this for me, I'd certainly vote for your answer.

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• Suggestions for a C++ IDE?

  - by AedonEtLIRA

  I know this is is a shifty question and really isn't easy to answer, but bare with me. For a while now I have been using Eclipse and doing Java programming. Now that I reach a point where I'm comfortable in Java, I wish to move on back into C++ and actually make something more than a single class that prints to terminal; and work in OpenGL :). So I wonder if anybody has a recomendation of IDE's that resemble or are as fluid as Eclipse? I am aware that Eclipse has a C++ plugin, but it really doesn't feel user friendly (at least to a pampered java programmer!). I have (I think I still have it?) a copy of Visual Studio 2005, but want to see if anyone has any better ideas. Thanks ~Aedon

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• sqrt(int_value + 0.0) ? The point?

  - by Earlz

  Hello, while doing some homework in my very strange C++ book, which I've been told before to throw away, had a very peculiar code segment. I know homework stuff always throws in extra "mystery" to try to confuse you like indenting 2 lines after a single-statement for-loop. But this one I'm confused on because it seems to serve some real-purpose. basically it is like this: int counter=10; ... if(pow(floor(sqrt(counter+0.0)),2) == counter) ... I'm interested in this part especially: sqrt(counter+0.0) Is there some purpose to the +0.0? Is this the poormans way of doing a static cast to a double? Does this avoid some compiler warning on some compiler I do not use? The entire program printed the exact same thing and compiled without warnings on g++ whenever I left out the +0.0 part. Maybe I'm not using a weird enough compiler?

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• using .NET how to convert iso8859-1 encoded text files that contain Latin-1 accented characters to u

  - by Tim

  I am being sent text files saved in iso88591-1 format that contain accented characters from the Latin-1 range (as well as normal ASCII a-z etc). How to convert these files to utf-8 using C# so that the single-byte accented characters in iso8859-1 become valid utf-8 characters? I have tried to use a StreamReader with ASCIIEncoding, and then converting the ascii string to UTF-8 by instantiating an ascii encoding and a utf8 encoding and then using Encoding.Convert(ascii, utf8, ascii.GetBytes( asciiString) ) — but the accented characters are being rendered as question marks. What step am I missing?

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• How to access Dispatcher in Silverlight tests?

  - by bluebit

  I am using the SL unit test framework for tests (http://code.msdn.microsoft.com/silverlightut). My code is heavily client-server communications dependant, and I access the GUI dispatcher in several places to make sure important data is only accessed on a single thread (ie. the GUI thread). This dispatcher seems unavailable in the unit tests - I have tried using Deployment.Current.Dispatcher and even created an instance of a blank control to try use its own dispatcher, but both don't work. The code inside of Dispatcher.BeginInvoke() just never executes, even if I include a Thread.Sleep afterwards.

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• Replace token in ANTLR

  - by user1019710

  I want to replace a token using ANTLR. I tried with TokenRewriteStream and replace, but it didn't work. Any suggestions? ANTLRStringStream in = new ANTLRStringStream(source); MyLexer lexer = new MyLexer(in); TokenRewriteStream tokens = new TokenRewriteStream(lexer); for(Object obj : tokens.getTokens()) { CommonToken token = (CommonToken)obj; tokens.replace(token, "replacement"); } The lexer finds all occurences of single-line comments, and i want to replace them in the original source too.

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• SSIS - Limiting Concurrent Connections

  - by Bigtoe

  Hi Folks, I am using SSIS to connect to a legecy mainframe database and this allows only 5 concurrent connections at a time. I have a dataflow task with many tables to transfer and it kicks outs because of this limitation. I have split up the Data Flow task into seperate data flows and this is working for the moment, but it is not optiomal as they need to be sequenced and 1 large transfer in a flow is holding up subsequent transfers. Anyone any idea of how to limit the number of connections in a single data flow, I had a look at using the Engine Threads but this did not make any difference. Any help much appericated.

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• Indexed key vs indexed separate columns, which one is faster ?

  - by Jerry

  In MYSQL, from a pure performance perspective, if I have a table with large amount of data with 10/1 read/write ratio. is it faster in read/write performance to have 4 search criteria in separate columns and all indexed or have them combined in to one single string acting as a key and store in one indexed column ? e.g. say this table with 5 columns, first name, last name, sex, country and file where the first four columns will ALWAYS be given as a part of search parameters in a search or have a table with two columns, key and file. where the value of key can be john-smith-male-australia ?? I don't quite get the pros and cons. the point I try to stress is the fact that all parameters will be given.in a search.

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• How would I implement separate databases for reading and writing operations?

  - by Matt

  I am interested in implementing an architecture that has two databases one for read operations and the other for writes. I have never implemented something like this and have always built single database, highly normalised systems so I am not quite sure where to begin. I have a few parts to this question. 1. What would be a good resource to find out more about this achitecture? 2. Is it just a question of replicating between two identical schemas, or would your schemas differ depending on the operations, would normalisation vary too? 3. How do you insure that data written to one database is immediately available for reading from the second? Any further help, tips, resources would be appreciated. Thanks.

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• how to write T-SQL to compare and copy data?

  - by George2

  Hello everyone, I have two SQL Server 2008 Enterprise databases (on two machines), and one of the databases is master database and another database is slave database. I want to transfer update from a table in source database to a table in destination database (two tables are of the same schema, both of them are using a single column as unique primary key). The transfer rule is (in short, the rule is keeping the destination database the same as source database because of the update of the source database), if there is a new row in source database but not in destination database, insert the row in destination database; if a row not exists in source database but exists in destination database, delete the row in destination database; if a row's content (i.e. columns other than primary key columns) changes in source database, update the new content into destination database. thanks in advance, George

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• How do I keep JTextFields in a Java Swing BoxLayout from expanding?

  - by Matthew

  I have a JPanel that looks something like this: JPanel panel = new JPanel(); panel.setLayout(new BoxLayout(panel, BoxLayout.Y_AXIS)); ... panel.add (jTextField1); panel.add (Box.createVerticalStrut(10)); panel.add (jButton1); panel.add (Box.createVerticalStrut(30)); panel.add (jTextField2); panel.add (Box.createVerticalStrut(10)); panel.add (jButton2); ... //etc. My problem is that the JTextFields become huge vertically. I want them to only be high enough for a single line, since that is all that the user can type in them. The buttons are fine (they don't expand vertically). Is there any way to keep the JTextFields from expanding? I'm pretty new to Swing, so let me know if I'm doing everything horribly wrong.

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• Flatten old history in Git

  - by schoetbi

  I have a git project that has run for a while and now I want to throw away the old history, say from start to two years back from now. With throw away I mean replace the many commits within this time with one single commit doing the same. I checked "git rebase -i " but this does not remove the other (full) history containing all commits from git. Here a graphical representation (d being the changesets): (base) -> d1 -> d2 -> d3 -> (HEAD) What I want is: (base,d1,d2) -> d3 -> (HEAD) How could this be done? Thanks.

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• rendering a new line in a string (\n) with drawRect

  - by Mrwolfy

  I am trying to render a string with a new line (line break \n), using drawRect. The code below renders the my string as a single line, with no line break, even though I am using the \n character. See the second to last line. UIFont *font = [UIFont fontWithName:@"HelveticaNeue-CondensedBlack" size:fontSize]; CGPoint point = CGPointMake(0,0); CGContextRef context = UIGraphicsGetCurrentContext(); CGContextSetRGBFillColor(context, 1.0, 1.0, 1.0, 1.0); CGContextSetRGBStrokeColor(context, 0.0, 0.0, 0.0, 1.0); CGContextSetLineWidth(context, 4.0); CGContextSetTextDrawingMode(context, kCGTextFillStroke); CGContextSaveGState(context); [@"test \n test" drawAtPoint:point withFont:font]; CGContextRestoreGState(context);

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• coldfusion class path for multiple services - only recognizing first directory

  - by ffc

  Hi, I am trying to use multiple web services on a single CF page. I have entered the stubs directory for each of the web services in the ColdFusion Class Path within administrator server settings java and jvm paths are listed separated by commas: c:\coldfusion9\stubs\ws1,c:\coldfusion9\stubs\ws2 for some reason, only the web service whose stub path is listed first will work. When I try to call the second web service, I get a "web service operation ... cannot be found" but if i switch the order of paths listed in the admin settings and restart the service, the web service listed first now will work. any ideas on how to manage multiple web services and their stubs ? thanks!

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• C# XOR on two byte variables will not compile without a cast

  - by Ash

  Why does the following raise a compile time error: 'Cannot implicitly convert type 'int' to 'byte': byte a = 25; byte b = 60; byte c = a ^ b; This would make sense if I were using an arithmentic operator because the result of a + b could be larger than can be stored in a single byte. However applying this to the XOR operator is pointless. XOR here it a bitwise operation that can never overflow a byte. using a cast around both operands works: byte c = (byte)(a ^ b);

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• Developing and deploying games for Windows, Mac (& Linux)

  - by nornagon

  I want to write games that run on all the major platforms. I also want people to be able to play them by downloading a file and double clicking it. That means a single .exe/.app file. I'm happy to use OpenGL directly for graphics. What I don't know how to do is show a window, handle mouse/keyboard input and play sounds in a cross-platform manner. I don't really mind what the underlying language is, as long as it isn't C++ or Java. C#, Ruby or Python would be preferable, in that order :) Please, SO, save me from having to write Flash games!

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• Time diff calculations where date and time are in seperate columns

  - by pedalpete

  I've got a query where I'm trying to get the hours in duration (eg 6.5 hours) between two different times. In my database, time and date are held in different fields so I can efficiently query on just a startDate, or endDate as I never query specifically on time. My query looks like this SELECT COUNT(*), IFNULL(SUM(TIMEDIFF(endTime,startTime)),0) FROM events WHERE user=18 Sometimes an event will go overnight, so the difference between times needs to take into account the differences between the dates as well. I've been trying SELECT COUNT(*), IFNULL(SUM(TIMEDIFF(CONCAT(endDate,' ',endTime),CONCAT(startDate,' ',startTime))),0) FROM events WHERE user=18 Unfortunately I only get errors when I do this, and I can't seem to combine the two fields into a single timestamp.

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• Open Folder within ClearCase Remote Client using Windows Explorer

  - by sammy

  Is there a way to open the folder location of a file from within CCRC? While I know I can open/copy from directly within CCRC, it is often useful to work directly with the file from within Windows Explorer. I am looking for something like "open file location" or "open in windows explorer". The folder within CCRC does not appear to allow opening it directly as the double-mouse-click action just expands the tree listing. The path is listed/copyable within the "ClearCase Details" tab, but I am trying to take my laziness to a whole new level by being able to open the folder with a single click. Any ideas if this is a feature available and where I can find it? Thanks. Info: Rational ClearCase Remote Client 7.1.1 Windows 7

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• How to track IIS server performance

  - by Chris Brandsma

  I have a reoccurring issue where a customer calls up and complains that the web site is too slow. Specifically, if they are inactive for a short period of time, then go back to the site, there will be a minute-two minute delay before the user sees a response. (the standard browser is Firefox in this case) I have Perfmon up and running, the cpu utilization is usually below 20% (single proc...don't ask). The database is humming along. And I'm pulling my hair out. So, what metrics/tools do you find useful when evaluating IIS performance?

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• iPhone UIImage number recognition

  - by Skeep

  Hi All, I have a small UIImage (jpg) with a single typed number. I want to be able to read the number with some kind of pattern recognition. I'm really not sure where to start, so any help would be appreciated. my initial idea was to compare this image with other images. For instance compare the image with that of a 1,2,3, etc until a match was found. That just seems slow and cumbersome and wondered if there was a better way to do it? Thanks

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• Incorporation of YUI 3 in rails

  - by lorefnon

  I was wondering if any effort has been made towards integration of YUI3 with rails asset pipeline. By integration, I don't just mean a couple of helpers for including the library but rather a complete integration of YUI module loader. I'll elaborate the idea in detail: Currently, developers developing modules using YUI rely on Ant tasks for concatenating the module components and wrapping them up with some associated metadata and generating target files ( and optionally minifying and running jslint). Also, when fetching the modules, the YUI loader calculates the module dependencies and generates a single file comprising of all the dependencies which havent been included already in the page. I was wondering if the whole functionality could be seamlessly integrated into the Asset pipeline of rails.

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