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  • How to synchronize a whole Ubuntu?

    - by Avio
    I think that the time is ripe to have my whole Ubuntu synchronized just as my Dropbox folder is. Given that we are always talking about files and directories, what's the difference between my Documents folder and my /usr system directory? Almost none, except for their location. In fact, I think that there is just one big issue that prevents people to have their beloved installations mirrored wherever they go: symlinks. Dropbox, Google Drive, Ubuntu One, Sugarsync, Skydrive, none of these services support symlinking. This means that if I push a symlink in one of the synced folders, locally the symlink is kept as is, but remotely (in the cloud or on the other synced machines) the symlink is resolved to the actual file that was originally pointed to. This completely disrupts Linux installations, thus these services can't be used for this purpose. So the question is. Does anybody knows a way to achieve this? A whole Ubuntu, always synchronized with a remote running copy, but still locally stored on both disks? My best guess is that I could use NFS. But the main difference between Dropbox and NFS is that NFS is a remote filesystem that always forces to remotely access the files, while Dropbox pushes modifcations to local filesystems (and thus would perform better). I've also heard about NFS caching. Does anybody knows if this solution could approximate Dropbox in this sense? P.s. I know that /boot, /dev, /proc, /run, /tmp and device-specific mountpoints in /mnt and /media will have to be left out the sync mechanism. What I'm interested in is the principle. Can this be done with reasonable performance, having reasonable resources (e.g. ~ 1Mbps upload bandwidth and a public IP address)?

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  • How to open-source a project whose git repository has copyrighted media in the history?

    - by phyzome
    I want to release an audio fingerprinting software project under a free license, but the repository contains copyrighted audio files. The test cases also currently use these files. How do I release the code to the public with maximum version history but without violating copyright? Details: The code is versioned under git. We will collapse it all back into one branch before release. There are 400 MB of audio data. Some files are free-licensed music from e.g. Jamendo, others are MP3s from our personal collections. No matter what approach we take, we'll always keep an immutable copy of the original repo, so as not to destroy project history. Main question: How to handle the public release? Expunge all history of the files in question from the git repository and release the altered repo. (v64 pointed out a way to do this.) Alternatively, take a snapshot of the current state of the code and don't even bother having a public history of the pre-release code. Side question: How could we have avoided this dilemma in the first place, given that sometimes private code or media is needed for the early stages of a project?

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  • "bug" in C++11 text by Stroustrup?

    - by Astara
    I found an apparent contradiction in the c++ text having to do with the result of the c_str() function operating on std:strings (in my copy, the definition and contradiction are on p1040). First it defines the c_str() function as something that produces a 'C-style' (zero-terminated) string, but later it talks about how a C++ c_str value can have embed a 'C'-style, end-of-string terminators (i.e. NUL's) embedded in the string (that is defined by being NUL terminated). Um... does anyone else feel that this is a 'stretching' of the definition of a C-string beyond it's definition? I.e. I think what it means, is that if you were to look at the length() function as applied to the string, it will show a different end of string than using the C-definition of a z-string -- one that can contain any character except NUL, and is terminated by NUL. I likely don't have to worry about it in my of my programs, but it seems like a subtle distinction that makes a C++ c_str, not really a 'C'-string. Am I misunderstanding this issue? Thanks!

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  • Will Ubuntu work out on my mother's computer?

    - by PleaseStand
    My mother had an old Compaq desktop computer running Windows 98, which she used for occasional Web browsing and playing cards. Recently, a relative brought up a newer computer; it ran Windows XP. Unfortunately, the hard drive failed soon afterward, forcing me to reinstall the operating system. Not having the original Windows disc or product key led me to consider Ubuntu Linux. Will it work for mom? Is the hardware compatible? (Check the history of this question for the full specifications.) Would Ubuntu/Xubuntu suffice, or would I be better off buying a new copy of Windows? Is her card game (Hoyle Card Games 3) likely to run on Wine? I believe the minimum system requirement is Windows 95. Failing Wine compatibility, is running Windows 98 on VirtualBox an option on such an old computer? Are there any equally good card games for Linux? She plays mainly Bridge, Poker, and Solitaire. Is there any "Large Fonts" option for those with poor vision? Is it possible to use a serial mouse?

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  • Is it okay to just add a page or two PHP page to add some functionality to a Drupal site?

    - by Zaemz
    I'm not familiar with Drupal, really. I can dig around the admin interface and navigate the directories and find the files that I need to just fine as well. What I'm really not familiar with is adding modules or extending modules. The site currently takes an order and sets up recurring payments through Ubercart and uses Authorize.net as a gateway. Right now, when a payment fails, a single e-mail gets sent out to the admin. We'd like to extend it to send an e-mail to the user and let them change their payment information through another page on the site. Authorize has a service called Silent Post URL that basically just posts a carbon copy in XML to whatever URL you give it. We'd like to accept that XML, deserialize it, parse the data, send a notice to the user and give them the page for updating their information. So, I guess it'll be two PHP pages. One for the XML API call from Authorize.net, and then one for the page for the users' to update their payment information. Could I just create two simple pages each handling their own tasks, or should I check out properly extending a module? If it's appropriate for me to write up the pages and not have to hook them into the module, what would be the best way to handle setting up what needs to get done? (The most experience I've had with extending a PHP site has been hacking away at someone else' poorly constructed, custom framework, so if anyone has any good resources perhaps on PHP best practices that they could share through a PM or a comment, I'd appreciate It) (Also, I'm still getting the hang of Stack Exchange, so if this isn't appropriate please let me know. I'll delete it.)

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  • How to keep track of user images when using a CDN? [closed]

    - by Programmer
    We are considering moving our user profile images from the local server to the Rackspace CDN (Cloud Files). However, how do you keep track of where each user's profile image is located on the CDN? Wouldn't you have to store the CDN URL for each user image in the local Database and query it every time you display a user image? Isn't that slower than accessing a user image directly on the local server which requires no such DB query to retrieve since you already know where it is stored based on the user's User ID? What if a user has an album of pics? How would you keep track of all those images that belong just to that one user? What about the order of those pics? In the case of the Rackspace CDN, we're looking at using a Container for each individual user to help keep things more logically organized, but we don't know what the best way to track all of it is since the CDN provides a seemingly random URL for each image. To make matters worse, you can't even delete a non-empty Container belonging to a user when they delete their account, you actually have to delete each object inside the Container one-by-one before deleting the Container itself. It doesn't end there, you can't even have nested Containers or "sub-folders", and you can't rename a file (you must copy it with a new name and delete the old one manually). It just sounds so incredibly more complicated then we thought it would be, and it certainly does not feel "intuitive" compared to local storage, so we don't know what to do. Please help.

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  • Separate update and render

    - by NSAddict
    I'm programming a simple Snake in Java. I'm a complete newbie when it comes to Java and Game Developing, so please bear with me ;) Until now, I have been using a UI thread, as well as a update-thread. The update thread just set the position, set the GameObjects, and so on. I didn't think much of concurrency, but now I've come to a problem. I wanted to modify the ArrayList<GameObject>, but it throws a java.util.ConcurrentModificationException. With a little research I found out that this happens because the two threads are trying to access the variables at the same time. But I didn't really find a way to prevent this. I thought about copying the array and swapping them out when the rendering is finished, but I would have to deep-copy them, which isn't really the best solution in my opinion. It probably eats up more CPU resources than a single-threaded game. Are there any other ways to prevent this? Thanks a lot for your help!

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  • After tarball restore my PC (tar xvfpz backup.tgz -C /), my sound card and network are not working. How to detect?

    - by axton hunger
    1 . I have a old laptop I installed Ubuntu 12.04 on. (It was ACER) 2 . I booted into single user mode and backed it up via cd / sudo -i tar cvpzf backup.tgz --exclude=/proc --exclude=/dev --exclude=/lost+found --exclude=/backup.tgz --exclude=/mnt --exclude=/sys / 3 . I installed a fresh copy of Ubuntu 1204 on my new laptop (It is Dell) 4 . I boot into single user mode 5 . I backup the existing /boot directory 6 . I untar my backup to restore on to the Dell sudo tar xvfpz backup.tgz -C / 7 . I restore the previous /boot directory again 8 . I boot it up, and my profile and settings are loaded ok but, Ubuntu shows that there is no Sound Card.. I cannot use unity to drag and change volume. I noticed that the network card also doesnt work. ** How do you make ubuntu recognize changed hardware, if the hardware is already configured for a different laptop? Does anyone know?**

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  • unittest import error with virtualenv + google-app-engine-django

    - by Ray Yun
    I'm working with google-app-engine-django + zipped django. Just running "python manage.py test" succeeded without error. But with virtualenv, test was failed with "import unittest error". same error with Django 1.1. - OSX 10.5.6 - google-app-engine-django (r101 via svn) : r100 was failed with launcher 1.3.0 - GoogleAppLauncher 1.3.0 - Django 1.1 & 1.1.1 (zipped) : both failed - virtualenv 1.4.5 - virtualenvwrapper 1.24 Error Message: (django_appengine)Reiot:warclouds Reiot$ python manage.py test WARNING:root:Could not read datastore data from /var/folders/UZ/UZ1vQeLFH2ShHk4kIiLcFk+++TI/-Tmp-/django_google-app-engine-django.datastore INFO:root:zipimporter('/Volumes/data/Documents/warclouds/django.zip', 'django/core/serializers/') .WARNING:root:Can't open zipfile /Users/Reiot/.virtualenvs/django_appengine/lib/python2.5/site-packages/setuptools-0.6c11-py2.5.egg: IOError: [Errno 13] file not accessible: '/Users/Reiot/.virtualenvs/django_appengine/lib/python2.5/site-packages/setuptools-0.6c11-py2.5.egg' WARNING:root:Can't open zipfile /Library/Frameworks/Python.framework/Versions/2.5/lib/python2.5/site-packages/setuptools-0.6c9-py2.5.egg: IOError: [Errno 13] file not accessible: '/Library/Frameworks/Python.framework/Versions/2.5/lib/python2.5/site-packages/setuptools-0.6c9-py2.5.egg' ERROR:root:Exception encountered handling request Traceback (most recent call last): File "/Applications/GoogleAppEngineLauncher.app/Contents/Resources/GoogleAppEngine-default.bundle/Contents/Resources/google_appengine/google/appengine/tools/dev_appserver.py", line 3177, in _HandleRequest self._Dispatch(dispatcher, self.rfile, outfile, env_dict) File "/Applications/GoogleAppEngineLauncher.app/Contents/Resources/GoogleAppEngine-default.bundle/Contents/Resources/google_appengine/google/appengine/tools/dev_appserver.py", line 3120, in _Dispatch base_env_dict=env_dict) File "/Applications/GoogleAppEngineLauncher.app/Contents/Resources/GoogleAppEngine-default.bundle/Contents/Resources/google_appengine/google/appengine/tools/dev_appserver.py", line 515, in Dispatch base_env_dict=base_env_dict) File "/Applications/GoogleAppEngineLauncher.app/Contents/Resources/GoogleAppEngine-default.bundle/Contents/Resources/google_appengine/google/appengine/tools/dev_appserver.py", line 2379, in Dispatch self._module_dict) File "/Applications/GoogleAppEngineLauncher.app/Contents/Resources/GoogleAppEngine-default.bundle/Contents/Resources/google_appengine/google/appengine/tools/dev_appserver.py", line 2289, in ExecuteCGI reset_modules = exec_script(handler_path, cgi_path, hook) File "/Applications/GoogleAppEngineLauncher.app/Contents/Resources/GoogleAppEngine-default.bundle/Contents/Resources/google_appengine/google/appengine/tools/dev_appserver.py", line 2185, in ExecuteOrImportScript exec module_code in script_module.__dict__ File "/Volumes/data/Documents/warclouds/main.py", line 28, in <module> from appengine_django import InstallAppengineHelperForDjango File "/Applications/GoogleAppEngineLauncher.app/Contents/Resources/GoogleAppEngine-default.bundle/Contents/Resources/google_appengine/google/appengine/tools/dev_appserver.py", line 1264, in Decorate return func(self, *args, **kwargs) File "/Applications/GoogleAppEngineLauncher.app/Contents/Resources/GoogleAppEngine-default.bundle/Contents/Resources/google_appengine/google/appengine/tools/dev_appserver.py", line 1914, in load_module return self.FindAndLoadModule(submodule, fullname, search_path) File "/Applications/GoogleAppEngineLauncher.app/Contents/Resources/GoogleAppEngine-default.bundle/Contents/Resources/google_appengine/google/appengine/tools/dev_appserver.py", line 1264, in Decorate return func(self, *args, **kwargs) File "/Applications/GoogleAppEngineLauncher.app/Contents/Resources/GoogleAppEngine-default.bundle/Contents/Resources/google_appengine/google/appengine/tools/dev_appserver.py", line 1816, in FindAndLoadModule description) File "/Applications/GoogleAppEngineLauncher.app/Contents/Resources/GoogleAppEngine-default.bundle/Contents/Resources/google_appengine/google/appengine/tools/dev_appserver.py", line 1264, in Decorate return func(self, *args, **kwargs) File "/Applications/GoogleAppEngineLauncher.app/Contents/Resources/GoogleAppEngine-default.bundle/Contents/Resources/google_appengine/google/appengine/tools/dev_appserver.py", line 1767, in LoadModuleRestricted description) File "/Volumes/data/Documents/warclouds/appengine_django/__init__.py", line 44, in <module> import unittest ImportError: No module named unittest INFO:root:"GET / HTTP/1.1" 500 - INFO:root:zipimporter('/Users/Reiot/.virtualenvs/django_appengine/lib/python2.5/site-packages/setuptools-0.6c11-py2.5.egg', '') INFO:root:zipimporter('/Library/Frameworks/Python.framework/Versions/2.5/lib/python2.5/site-packages/setuptools-0.6c9-py2.5.egg', '') F........................................................... ====================================================================== FAIL: a request to the default page works in the dev_appserver ---------------------------------------------------------------------- Traceback (most recent call last): File "/Volumes/data/Documents/warclouds/appengine_django/tests/integration_test.py", line 176, in testBasic self.assertEquals(rv.status_code, 200) AssertionError: 500 != 200 I also tried with console import but it was ok. > which python /Users/Reiot/.virtualenvs/django_appengine/bin/python > python >>> import unittest Here is my environments: $ mkvirtualenv --no-site-packages no-django $ mkvirtualenv --no-site-packages django-1.1 $ mkvirtualenv --no-site-packages django-1.1.1 (django-1.1)$ easy_install Django-1.1.tar (django-1.1.1)$ easy_install Django-1.1.1.tar $ mkdir google-app-engine-django-svn $ cp -r google-app-engine-django-svn google-app-engine-django-svn-django-1.1 // copy appropriate django.zip $ cp -r google-app-engine-django-svn google-app-engine-django-svn-django-1.1.1 // copy appropriate django.zip

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  • iPhone Serialization problem

    - by Jenicek
    Hi, I need to save my own created class to file, I found on the internet, that good approach is to use NSKeyedArchiver and NSKeyedUnarchiver My class definition looks like this: @interface Game : NSObject <NSCoding> { NSMutableString *strCompleteWord; NSMutableString *strWordToGuess; NSMutableArray *arGuessedLetters; //This array stores characters NSMutableArray *arGuessedLettersPos; //This array stores CGRects NSInteger iScore; NSInteger iLives; NSInteger iRocksFallen; BOOL bGameCompleted; BOOL bGameOver; } I've implemented methods initWithCoder: and encodeWithCoder: this way: - (id)initWithCoder:(NSCoder *)coder { if([coder allowsKeyedCoding]) { strCompleteWord = [[coder decodeObjectForKey:@"CompletedWord"] copy]; strWordToGuess = [[coder decodeObjectForKey:@"WordToGuess"] copy]; arGuessedLetters = [[coder decodeObjectForKey:@"GuessedLetters"] retain]; // arGuessedLettersPos = [[coder decodeObjectForKey:@"GuessedLettersPos"] retain]; iScore = [coder decodeIntegerForKey:@"Score"]; iLives = [coder decodeIntegerForKey:@"Lives"]; iRocksFallen = [coder decodeIntegerForKey:@"RocksFallen"]; bGameCompleted = [coder decodeBoolForKey:@"GameCompleted"]; bGameOver = [coder decodeBoolForKey:@"GameOver"]; } else { strCompleteWord = [[coder decodeObject] retain]; strWordToGuess = [[coder decodeObject] retain]; arGuessedLetters = [[coder decodeObject] retain]; // arGuessedLettersPos = [[coder decodeObject] retain]; [coder decodeValueOfObjCType:@encode(NSInteger) at:&iScore]; [coder decodeValueOfObjCType:@encode(NSInteger) at:&iLives]; [coder decodeValueOfObjCType:@encode(NSInteger) at:&iRocksFallen]; [coder decodeValueOfObjCType:@encode(BOOL) at:&bGameCompleted]; [coder decodeValueOfObjCType:@encode(BOOL) at:&bGameOver]; } return self; } - (void)encodeWithCoder:(NSCoder *)coder { if([coder allowsKeyedCoding]) { [coder encodeObject:strCompleteWord forKey:@"CompleteWord"]; [coder encodeObject:strWordToGuess forKey:@"WordToGuess"]; [coder encodeObject:arGuessedLetters forKey:@"GuessedLetters"]; //[coder encodeObject:arGuessedLettersPos forKey:@"GuessedLettersPos"]; [coder encodeInteger:iScore forKey:@"Score"]; [coder encodeInteger:iLives forKey:@"Lives"]; [coder encodeInteger:iRocksFallen forKey:@"RocksFallen"]; [coder encodeBool:bGameCompleted forKey:@"GameCompleted"]; [coder encodeBool:bGameOver forKey:@"GameOver"]; } else { [coder encodeObject:strCompleteWord]; [coder encodeObject:strWordToGuess]; [coder encodeObject:arGuessedLetters]; //[coder encodeObject:arGuessedLettersPos]; [coder encodeValueOfObjCType:@encode(NSInteger) at:&iScore]; [coder encodeValueOfObjCType:@encode(NSInteger) at:&iLives]; [coder encodeValueOfObjCType:@encode(NSInteger) at:&iRocksFallen]; [coder encodeValueOfObjCType:@encode(BOOL) at:&bGameCompleted]; [coder encodeValueOfObjCType:@encode(BOOL) at:&bGameOver]; } } And I use these methods to archive and unarchive data: [NSKeyedArchiver archiveRootObject:currentGame toFile:strPath]; Game *currentGame = [NSKeyedUnarchiver unarchiveObjectWithFile:strPath]; I have two problems. 1) As you can see, lines with arGuessedLettersPos is commented, it's because every time I try to encode this array, error comes up(this archiver cannot encode structs), and this array is used for storing CGRect structs. I've seen solution on the internet. The thing is, that every CGRect in the array is converted to an NSString (using NSStringFromCGRect()) and then saved. Is it a good approach? 2)This is bigger problem for me. Even if I comment this line and then run the code successfully, then save(archive) the data and then try to load (unarchive) them, no data is loaded. There aren't any error but currentGame object does not have data that should be loaded. Could you please give me some advice? This is first time I'm using archivers and unarchivers. Thanks a lot for every reply.

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  • Visual Studio 2010 and javascript debugging in external javascript files (embedded and minified).

    - by OKB
    Hi, The asp.net web application I'm working on is written in asp.net 3.5, the web app solution is upgraded from VS 2008 (don't know if that matter). The solution had javascript in the aspx files before I moved the javascript to external files. Now what I have done is to set all the javascript files to be embedded resource (except the jquery.js file) and I want to minify them when building for release by using the MS Ajax Minifier. I want to use the minified javascript files when I'm in the RELEASE mode and when I'm in DEBUG mode I want to use the "normal" versions. My problem now is that I'm unable to debug the javascript code in debug mode. When I set a break point a javascript function, VS is not breaking at all when the function is executed. I have added this entry in my web.config: <system.web> <compilation defaultLanguage="c#" debug="true" /> </system.web> Here how I register the jquery in an aspx-file: <asp:ScriptManagerProxy ID="ScriptManagerProxy1" runat="server"> <Scripts> <asp:ScriptReference Path="~/Javascript/jquery.js"/> </Scripts> </asp:ScriptManagerProxy> External javascript registration in the code-behind: #if DEBUG [assembly: WebResource("braArkivWeb.Javascript.jquery.js", "text/javascript")] [assembly: WebResource(braArkivWeb.ArkivdelSearch.JavaScriptResource, "text/javascript")] #else [assembly: WebResource("braArkivWeb.Javascript.jquery.min.js", "text/javascript")] [assembly: WebResource(braArkivWeb.ArkivdelSearch.JavaScriptMinResource, "text/javascript")] #endif public partial class ArkivdelSearch : Page { public const string JavaScriptResource = "braArkivWeb.ArkivdelSearch.js"; public const string JavaScriptMinResource = "braArkivWeb.ArkivdelSearch.min.js"; protected void Page_Init(object sender, EventArgs e) { InitPageClientScript(); } private void InitPageClientScript() { #if DEBUG this.Page.ClientScript.RegisterClientScriptResource(typeof(ArkivdelSearch), "braArkivWeb.Javascript.jquery.js"); this.Page.ClientScript.RegisterClientScriptResource(typeof(ArkivdelSearch), JavaScriptResource); #else this.Page.ClientScript.RegisterClientScriptResource(typeof(ArkivdelSearch), "braArkivWeb.Javascript.jquery.min.js"); this.Page.ClientScript.RegisterClientScriptResource(typeof(ArkivdelSearch), JavaScriptMinResource); #endif StringBuilder sb = new StringBuilder(); Page.ClientScript.RegisterStartupScript(typeof(ArkivdelSearch), "initArkivdelSearch", sb.ToString(), true); } } In the project file I have added this code to minify the javascripts: <!-- Minify all JavaScript files that were embedded as resources --> <UsingTask TaskName="AjaxMin" AssemblyFile="$(MSBuildProjectDirectory)\..\..\SharedLib\AjaxMinTask.dll" /> <PropertyGroup> <ResGenDependsOn> MinifyJavaScript; $(ResGenDependsOn) </ResGenDependsOn> </PropertyGroup> <Target Name="MinifyJavaScript" Condition=" '$(ConfigurationName)'=='Release' "> <Copy SourceFiles="@(EmbeddedResource)" DestinationFolder="$(IntermediateOutputPath)" Condition="'%(Extension)'=='.js'"> <Output TaskParameter="DestinationFiles" ItemName="EmbeddedJavaScriptResource" /> </Copy> <AjaxMin JsSourceFiles="@(EmbeddedJavaScriptResource)" JsSourceExtensionPattern="\.js$" JsTargetExtension=".js" /> <ItemGroup> <EmbeddedResource Remove="@(EmbeddedResource)" Condition="'%(Extension)'=='.js'" /> <EmbeddedResource Include="@(EmbeddedJavaScriptResource)" /> <FileWrites Include="@(EmbeddedJavaScriptResource)" /> </ItemGroup> </Target> Do you see what I'm doing wrong? Or what I'm missing in order to be able to debug my javascript code? Best Regards, OKB

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  • Using windows command line from Pascal

    - by Jordan
    I'm trying to use some windows command line tools from within a short Pascal program. To make it easier, I'm writing a function called DoShell which takes a command line string as an argument and returns a record type called ShellResult, with one field for the process's exitcode and one field for the process's output text. I'm having major problems with some standard library functions not working as expected. The DOS Exec() function is not actually carrying out the command i pass to it. The Reset() procedure gives me a runtime error RunError(2) unless i set the compiler mode {I-}. In that case i get no runtime error, but the Readln() functions that i use on that file afterwards don't actually read anything, and furthermore the Writeln() functions used after that point in the code execution do nothing as well. Here's the source code of my program so far. I'm using Lazarus 0.9.28.2 beta, with Free Pascal Compiler 2.24 program project1; {$mode objfpc}{$H+} uses Classes, SysUtils, StrUtils, Dos { you can add units after this }; {$IFDEF WINDOWS}{$R project1.rc}{$ENDIF} type ShellResult = record output : AnsiString; exitcode : Integer; end; function DoShell(command: AnsiString): ShellResult; var exitcode: Integer; output: AnsiString; exepath: AnsiString; exeargs: AnsiString; splitat: Integer; F: Text; readbuffer: AnsiString; begin //Initialize variables exitcode := 0; output := ''; exepath := ''; exeargs := ''; splitat := 0; readbuffer := ''; Result.exitcode := 0; Result.output := ''; //Split command for processing splitat := NPos(' ', command, 1); exepath := Copy(command, 1, Pred(splitat)); exeargs := Copy(command, Succ(splitat), Length(command)); //Run command and put output in temporary file Exec(FExpand(exepath), exeargs + ' __output'); exitcode := DosExitCode(); //Get output from file Assign(F, '__output'); Reset(F); Repeat Readln(F, readbuffer); output := output + readbuffer; readbuffer := ''; Until Eof(F); //Set Result Result.exitcode := exitcode; Result.output := output; end; var I : AnsiString; R : ShellResult; begin Writeln('Enter a command line to run.'); Readln(I); R := DoShell(I); Writeln('Command Exit Code:'); Writeln(R.exitcode); Writeln('Command Output:'); Writeln(R.output); end.

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  • Using DateTime in a SqlParameter for Stored Procedure, format error

    - by Matt
    I'm trying to call a stored procedure (on a SQL 2005 server) from C#, .NET 2.0 using DateTime as a value to a SqlParameter. The SQL type in the stored procedure is 'datetime'. Executing the sproc from SQL Management Studio works fine. But everytime I call it from C# I get an error about the date format. When I run SQL Profiler to watch the calls, I then copy paste the exec call to see whats going on. These are my observations and notes about what I've attempted: 1) If I pass the DateTime in directly as a DateTime or converted to SqlDateTime, the field is surrounding by a PAIR of single quotes, such as @Date_Of_Birth=N''1/8/2009 8:06:17 PM'' 2) If I pass the DateTime in as a string, I only get the single quotes 3) Using SqlDateTime.ToSqlString() does not result in a UTC formatted datetime string (even after converting to universal time) 4) Using DateTime.ToString() does not result in a UTC formatted datetime string. 5) Manually setting the DbType for the SqlParameter to DateTime does not change the above observations. So, my questions then, is how on earth do I get C# to pass the properly formatted time in the SqlParameter? Surely this is a common use case, why is it so difficult to get working? I can't seem to convert DateTime to a string that is SQL compatable (e.g. '2009-01-08T08:22:45') EDIT RE: BFree, the code to actually execute the sproc is as follows: using (SqlCommand sprocCommand = new SqlCommand(sprocName)) { sprocCommand.Connection = transaction.Connection; sprocCommand.Transaction = transaction; sprocCommand.CommandType = System.Data.CommandType.StoredProcedure; sprocCommand.Parameters.AddRange(parameters.ToArray()); sprocCommand.ExecuteNonQuery(); } To go into more detail about what I have tried: parameters.Add(new SqlParameter("@Date_Of_Birth", DOB)); parameters.Add(new SqlParameter("@Date_Of_Birth", DOB.ToUniversalTime())); parameters.Add(new SqlParameter("@Date_Of_Birth", DOB.ToUniversalTime().ToString())); SqlParameter param = new SqlParameter("@Date_Of_Birth", System.Data.SqlDbType.DateTime); param.Value = DOB.ToUniversalTime(); parameters.Add(param); SqlParameter param = new SqlParameter("@Date_Of_Birth", SqlDbType.DateTime); param.Value = new SqlDateTime(DOB.ToUniversalTime()); parameters.Add(param); parameters.Add(new SqlParameter("@Date_Of_Birth", new SqlDateTime(DOB.ToUniversalTime()).ToSqlString())); Additional EDIT The one I thought most likely to work: SqlParameter param = new SqlParameter("@Date_Of_Birth", System.Data.SqlDbType.DateTime); param.Value = DOB; Results in this value in the exec call as seen in the SQL Profiler @Date_Of_Birth=''2009-01-08 15:08:21:813'' If I modify this to be @Date_Of_Birth='2009-01-08T15:08:21' It works, but it won't parse with pair of single quotes, and it wont convert to a datetime correctly with the space between the date and time and with the milliseconds on the end. Update and Success First and foremost, thank you everyone for the answers. I post this for the sake of completeness and accuracy on SO - because I certainly do not do it for my pride... I had copy/pasted the code above after the request from below. I trimmed things here and there to be concise. Turns out my problem was in the code I left out, which I'm sure any one of you would have spotted in an instant. I had wrapped my sproc calls inside a transaction. Turns out that I was simply not doing transaction.Commit()!!!!! I'm ashamed to say it, but there you have it. I still don't know what's going on with the syntax I get back from the profiler. A coworker watched with his own instance of the profiler from his computer, and it returned proper syntax. Watching the very SAME executions from my profiler showed the incorrect syntax. It acted as a red-herring, making me believe there was a query syntax problem instead of the much more simple and true answer, which was that I need to commit the transaction! I marked an answer below as correct, and threw in some up-votes on others because they did, after all, answer the question, even if they didn't fix my specific (brain lapse) issue. Thanks again for the help.

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  • overloaded stream insertion operator with a vector

    - by Julz
    hi, i'm trying to write an overloaded stream insertion operator for a class who's only member is a vector. i dont really know what i'm doing. (lets make that clear) it's a vector of "Points" which is a struct containing two doubles. i figure what i want is to insert user input (a bunch of doubles) into a stream that i then send to a modifier method? i keep working off other stream insertion examples such as... std::ostream& operator<< (std::ostream& o, Fred const& fred) { return o << fred.i_; } but when i try a similar..... istream & operator >> (istream &inStream, Polygon &vertStr) { inStream >> ws; inStream >> vertStr.vertices; return inStream; } i get an error "no match for operator etc etc. if i leave off the .vertices it compiles but i figure it's not right? (vertices is the name of my vector ) and even if it is right, i dont actually know what syntax to use in my driver to use it? also not %100 on what my modifier method needs to look like. here's my Polygon class //header #ifndef POLYGON_H #define POLYGON_H #include "Segment.h" #include <vector> class Polygon { friend std::istream & operator >> (std::istream &inStream, Polygon &vertStr); public: //Constructor Polygon(const Point &theVerts); //Default Constructor Polygon(); //Copy Constructor Polygon(const Polygon &polyCopy); //Accessor/Modifier methods inline std::vector<Point> getVector() const {return vertices;} //Return number of Vector elements inline int sizeOfVect() const {return (int) vertices.capacity();} //add Point elements to vector inline void setVertices(const Point &theVerts){vertices.push_back (theVerts);} private: std::vector<Point> vertices; }; #endif //Body using namespace std; #include "Polygon.h" // Constructor Polygon::Polygon(const Point &theVerts) { vertices.push_back (theVerts); } //Copy Constructor Polygon::Polygon(const Polygon &polyCopy) { vertices = polyCopy.vertices; } //Default Constructor Polygon::Polygon(){} istream & operator >> (istream &inStream, Polygon &vertStr) { inStream >> ws; inStream >> vertStr; return inStream; } any help greatly appreciated, sorry to be so vague, a lecturer has just kind of given us a brief example of stream insertion then left us on our own thanks. oh i realise there are probably many other problems that need fixing

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  • Diagramming Software for a Developer/Designer

    - by Craig Walker
    For a long time I've been looking for a good diagramming/vector-based drawing program that meets my needs as a developer. I'd like to: Draw database diagrams Draw flow charts Draw object-modeling diagrams (UML being the standard) Draw other free-form diagrams (basically boxes & arrows with the occasional clipart) Draw mockups of user interfaces and web pages EDIT: I want good-looking electronic-format diagrams that I can show to 3rd parties, not just something for my own internal use. EDIT 2: I'm also looking for Windows software, although I'm toying with the idea of switching to Mac, so a really good Mac-only product might get me to switch. Basically I need a good vector graphic program (with decent grouping, connecting lines, and ideally auto-routing). I'd prefer a diagramming tool that can also be used for drawing (for the UI mockups) rather than a drawing tool that can also be used for diagrams. I've tried Visio on several occasions, and every time I've been disappointed. The interface always seems to get in my way at some point. It's pretty close to what I want, and the latest version (I got the trail from MS) seems to be better than previous ones in terms of usability, but I really don't want to plunk down that sort of cash for a mediocre product. I've tried Dia and Inkscape, and while initially promising and with the right price tag, I found both of them to be lacking in several ways (including some recurring bugs). I've toyed with getting Adobe Illustrator, but I've never used it before, and I have a feeling that it wouldn't handle the diagramming aspect very well, and I don't want to buy a copy just to find out it doesn't meet my needs. So far, the product that I've had the most success with is, sadly, OpenOffice Draw. It's free of course (which lowers my expectations and thus improves my view of it) and its usability is pretty good, but in the end I'd like something more suited to diagramming. I'm willing to spend real money (in the $500-$1K range) for a really good piece of software if it does everything I want it to. The front runner is of course Visio but I'm hoping for more. Does anybody have any recommendations? CONCLUSION: @dlamblin had the most informative post, but the part I gained the most from was his/her (and others) mention of OmniGraffle, not Gliffy. I gave Gliffy a try, and it seemed neet for occational use, but since it's a Flash app (note: not AJAX as dlamblin mentioned) it's still a bit of a pain to use (no keyboard shortcuts for copy/paste was pretty much a deal breaker for me). I also tried SmartDraw, but it had 3-strikes-you're-out against it: The trial period was only 7 days long. It used some nonstandard (and visually jarring) GUI widget toolkit for its UI. At the very least it makes me suspicious (how do I know it will actually work & support the standard Windows features?) It crashed on me early into my trial. OmniGraffle looks like exactly what I want... except that it's Mac-only (so I couldn't give it a try). However, it got good reviews from my Mac-owning coworker, and I hope to try it on a friend's Mac soon. If it's good enough then I might spring for a new MacBook.

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  • UITableView crashes when trying to scroll

    - by Ondrej
    Hi, I have a problem with data in UITableView. I have UIViewController, that contains UITableView outlet and few more things I am using and ... It works :) ... it works lovely, but ... I've created an RSS reader class that is using delegates to deploy the data to the table ... and once again, If I'll just create dummy data in the main controller everything works! problem is with this line: rss.delegate = self; Preview looks a little bit broken than here are those RSS reader files on Google code: (Link to the header file on GoogleCode) (Link to the implementation file on Google code) viewDidLoad function of my controller: IGDataRss20 *rss = [[[IGDataRss20 alloc] init] autorelease]; rss.delegate = self; [rss initWithContentsOfUrl:@"http://rss.cnn.com/rss/cnn_topstories.rss"]; and my delegate methods: - (void)parsingEnded:(NSArray *)result { super.data = [[NSMutableArray alloc] initWithArray:result]; NSLog(@"My Items: %d", [super.data count]); [super.table reloadData]; NSLog(@"Parsing ended"); } (void)parsingError:(NSString *)message { NSLog(@"MyMessage: %@", message); } (void)parsingStarted:(NSXMLParser *)parser { NSLog(@"Parsing started"); } Just to clarify, NSLog(@"Parsing ended"); is being executed and I have 10 items in the array. Ok, here's my RSS reader header file: @class IGDataRss20; @protocol IGDataRss20Delegate @optional (void)parsingStarted:(NSXMLParser *)parser; (void)parsingError:(NSString *)message; (void)parsingEnded:(NSArray *)result; @end @interface IGDataRss20 : NSObject { NSXMLParser *rssParser; NSMutableArray *data; NSMutableDictionary *currentItem; NSString *currentElement; id <IGDataRss20Delegate> delegate; } @property (nonatomic, retain) NSMutableArray *data; @property (nonatomic, assign) id delegate; (void)initWithContentsOfUrl:(NSString *)rssUrl; (void)initWithContentsOfData:(NSData *)inputData; @end And this RSS reader implementation file: #import "IGDataRss20.h" @implementation IGDataRss20 @synthesize data, delegate; (void)initWithContentsOfUrl:(NSString *)rssUrl { self.data = [[NSMutableArray alloc] init]; NSURL *xmlURL = [NSURL URLWithString:rssUrl]; rssParser = [[NSXMLParser alloc] initWithContentsOfURL:xmlURL]; [rssParser setDelegate:self]; [rssParser setShouldProcessNamespaces:NO]; [rssParser setShouldReportNamespacePrefixes:NO]; [rssParser setShouldResolveExternalEntities:NO]; [rssParser parse]; } (void)initWithContentsOfData:(NSData *)inputData { self.data = [[NSMutableArray alloc] init]; rssParser = [[NSXMLParser alloc] initWithData:inputData]; [rssParser setDelegate:self]; [rssParser setShouldProcessNamespaces:NO]; [rssParser setShouldReportNamespacePrefixes:NO]; [rssParser setShouldResolveExternalEntities:NO]; [rssParser parse]; } (void)parserDidStartDocument:(NSXMLParser *)parser { [[self delegate] parsingStarted:parser]; } (void)parser:(NSXMLParser *)parser parseErrorOccurred:(NSError *)parseError { NSString * errorString = [NSString stringWithFormat:@"Unable to parse RSS feed (Error code %i )", [parseError code]]; NSLog(@"Error parsing XML: %@", errorString); if ([parseError code] == 31) NSLog(@"Error code 31 is usually caused by encoding problem."); [[self delegate] parsingError:errorString]; } (void)parser:(NSXMLParser *)parser didStartElement:(NSString *)elementName namespaceURI:(NSString *)namespaceURI qualifiedName:(NSString *)qName attributes:(NSDictionary *)attributeDict { currentElement = [elementName copy]; if ([elementName isEqualToString:@"item"]) currentItem = [[NSMutableDictionary alloc] init]; } (void)parser:(NSXMLParser *)parser didEndElement:(NSString *)elementName namespaceURI:(NSString *)namespaceURI qualifiedName:(NSString *)qName { if ([elementName isEqualToString:@"item"]) { [data addObject:(NSDictionary *)[currentItem copy]]; } } (void)parser:(NSXMLParser *)parser foundCharacters:(NSString *)string { if (![currentItem objectForKey:currentElement]) [currentItem setObject:[[[NSMutableString alloc] init] autorelease] forKey:currentElement]; [[currentItem objectForKey:currentElement] appendString:string]; } (void)parserDidEndDocument:(NSXMLParser *)parser { //NSLog(@"RSS array has %d items: %@", [data count], data); [[self delegate] parsingEnded:(NSArray *)self.data]; } (void)dealloc { [data, delegate release]; [super dealloc]; } @end Hope someone will be able to help me as I am becoming to be quite desperate, and I thought I am not already such a greenhorn :) Thanks, Ondrej

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  • Can't obtain reference to EKReminder array retrieved from fetchRemindersMatchingPredicate

    - by Scionwest
    When I create an NSPredicate via EKEventStore predicateForRemindersInCalendars; and pass it to EKEventStore fetchRemindersMatchingPredicate:completion:^ I can loop through the reminders array provided by the completion code block, but when I try to store a reference to the reminders array, or create a copy of the array into a local variable or instance variable, both array's remain empty. The reminders array is never copied to them. This is the method I am using, in the method, I create a predicate, pass it to the event store and then loop through all of the reminders logging their title via NSLog. I can see the reminder titles during runtime thanks to NSLog, but the local arrayOfReminders object is empty. I also try to add each reminder into an instance variable of NSMutableArray, but once I leave the completion code block, the instance variable remains empty. Am I missing something here? Can someone please tell me why I can't grab a reference to all of the reminders for use through-out the app? I am not having any issues at all accessing and storing EKEvents, but for some reason I can't do it with EKReminders. - (void)findAllReminders { NSPredicate *predicate = [self.eventStore predicateForRemindersInCalendars:nil]; __block NSArray *arrayOfReminders = [[NSArray alloc] init]; [self.eventStore fetchRemindersMatchingPredicate:predicate completion:^(NSArray *reminders) { arrayOfReminders = [reminders copy]; //Does not work. for (EKReminder *reminder in reminders) { [self.remindersForTheDay addObject:reminder]; NSLog(@"%@", reminder.title); } }]; //Always = 0; if ([self.remindersForTheDay count]) { NSLog(@"Instance Variable has reminders!"); } //Always = 0; if ([arrayOfReminders count]) { NSLog(@"Local Variable has reminders!"); } } The eventStore getter is where I perform my instantiation and get access to the event store. - (EKEventStore *)eventStore { if (!_eventStore) { _eventStore = [[EKEventStore alloc] init]; //respondsToSelector indicates iOS 6 support. if ([_eventStore respondsToSelector:@selector(requestAccessToEntityType:completion:)]) { //Request access to user calendar [_eventStore requestAccessToEntityType:EKEntityTypeEvent completion:^(BOOL granted, NSError *error) { if (granted) { NSLog(@"iOS 6+ Access to EventStore calendar granted."); } else { NSLog(@"Access to EventStore calendar denied."); } }]; //Request access to user Reminders [_eventStore requestAccessToEntityType:EKEntityTypeReminder completion:^(BOOL granted, NSError *error) { if (granted) { NSLog(@"iOS 6+ Access to EventStore Reminders granted."); } else { NSLog(@"Access to EventStore Reminders denied."); } }]; } else { //iOS 5.x and lower support if Selector is not supported NSLog(@"iOS 5.x < Access to EventStore calendar granted."); } for (EKCalendar *cal in self.calendars) { NSLog(@"Calendar found: %@", cal.title); } [_eventStore reset]; } return _eventStore; } Lastly, just to show that I am initializing my remindersForTheDay instance variable using lazy instantiation. - (NSMutableArray *)remindersForTheDay { if (!_remindersForTheDay) _remindersForTheDay = [[NSMutableArray alloc] init]; return _remindersForTheDay; } I've read through the Apple documentation and it doesn't provide any explanation that I can find to answer this. I read through the Blocks Programming docs and it states that you can access local and instance variables without issues from within a block, but for some reason, the above code does not work. Any help would be greatly appreciated, I've scoured Google for answers but have yet to get this figured out. Thanks everyone! Johnathon.

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  • Push Trunk or Push Branch to Production

    - by coffeeaddict
    I'd like to get an idea of some processes on build process with Tortoise SVN. Primarily I'm wondering do you push: The Mainline Trunk A branch after QA has grabbed it into a working copy locally and tested the branch and then some build pushes that branch The problem I have is I work at a craphole (hey, it is what it is and I'm venting on stackoverflow, you better believe it..good way to relieve stress due to complete utter chaos) and we have no formal process for pushing anything. In fact even worse my boss directly codes against production. When I have changes, he pushes the mainline trunk. The problem becomes when I make database changes on our Dev database for lets say Branch A. Well...that breaks Branch B and C. I have like 4 projects going on at once! Why? Well, I will not get into that (chaos). So consequently I rename a table field, or add a field or whatever in SQL Server and walla, now my other branches have stale code pointing to previous field names. So what happens? I have to merge certain changes to this branch, to that branch, etc. It feels like a war zone. Finally, what happens is I try to only merge the minimum. Lets say I made DB changes for Branch A's code but now I had to jump back on Branch B's project. Well I need to merge "some" of A's changes over for those database changes so that B's code is not going to bomb out and is able to work with the new table changes. Finally boss pushes the mainline trunk to production. Now I get an email "you forgot to remove the hyperlink for this". That hyperlink was actually a feature I added in Branch A. But what he's talking about here is he just pushed the mainline trunk to production which now has my merged changes from Branch B and any database scripts for Branch A because remember I had some DB changes and if he pushes code, it's got to reflect those changes thus some partial database changes must also be pushed even if it's not related to this project. Well...I missed the hyperlink, so kill me. Maybe that's why we need a build process boss? (sorry, it's been a nightmare working here which is why this thread is getting so detailed). Anyway, obviously this is a nightmare. And he dictates almost everything. The only reason we have source control is because I've worked on hard core teams and that's the first thing you setup. Well there was none here. Problem is I can't dictate the structure..he does but he's never really used source control!! My God. So we have no QA. This is an e-commerce website. That's another huge issue. So consequently I'm expected to be perfect. That means mainline trunk needs to be perfect for whatever we're pushing, whatever branch feature. Is this luda? wtf do I do? I could go off on him after tying so many times tactfully to explain that we need a freakin build process (not just copy local mainline trunk to production!) but I've tried to push before and got yelled at. So I gave up on that. So it will help me tremendously to know how others are pushing their source from Tortoise to production. I was not the person pushing when I was on previous teams so really I'm not too versed in build processes. We are a fairly good size e-commerce site and get a couple millions hits a month.

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  • What precautions should you take when a senior employee leaves?

    - by Mahin
    EDIT : I agree one should check the reasons, why a senior level employee is leaving. But I am interested in knowing the official/management/technical/legal steps one should take after its decided that he is leaving, so that the life after him is smooth. What are the steps management should take when a senior programmer/team lead leaves your company. Some of them which I have thought about are : 1) If He used to manage hosting and domains stuff, change passwords of domain control panels and hosting panels. 2) If your published web sites have maintenance account and he is aware of credentials of that account then change this details also. 3) Suspend mail account for some time and forward all eMails of that account to some ex-employee account. After some time close that account. What are the other things one should check. I am expecting the answer to be a general check list one should follow. It should include both technical scenarios and management scenarios. Notable Suggestions so far : Effectively transfer the responsibilities of that employee to another one without causing any potential delay in your work. Protect your source code. If possible Make them to sign something to say that they don't have copies of source code.. You can also consider NDA here. Use the Notice Period to train his replacement. Now any new code to the project will be done by replacement with the help of Guy who is leaving. Ask him to create a document of things he thinks you should know. Make sure he checks everything in now and then any checkout will only be done by the replacement. Emails, copy off his email account to a pst.file (this assumes Outlook), Make this file available to his replacement. the employee should probably be given a chance to scrub the email. if you are going to keep his account open for whatever reason, check that no rules are created that forward incoming emails to an alternate address. Copy the hard drive of his computer to a network location and have someone senior go through and see if there are any files (drafts of performance reviews or other sensitive issues ) on it that someone else might need. Clearance from Accounts,Finance,Security,Library etc departments.Obtain all company property, laptops, keys, etc. If there is no reason not to, you should reward a departing person for their many years of service. Write them letters of recommendation (even if they already have a new job lined up).Say goodbye, and keep the door open. Make sure any outside clients know that the departing employee is not their main contact anymore. Never neglect the exit interview/debriefing. Confirm the last day of employment so that there is no misunderstanding Inform H/R if the employee is on H1B status, there is paperwork required to notify the government when an H1B employee leaves. Depending on how senior / what position, you might spend some time convincing him not to take the rest of the engineering staff with him. Make sure he spends his last days on a good note, because if he is not leaving on a good note, he can easily pollute the mind of his colleagues. Best Regards, Mahin Gupta EDIT : Now offered a bounty on it to get more detailed responses and practical suggestions.

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  • FreeType2 Bitmap to System::Drawing::Bitmap.

    - by Dennis Roche
    Hi, I'm trying to convert a FreeType2 bitmap to a System::Drawing::Bitmap in C++/CLI. FT_Bitmap has a unsigned char* buffer that contains the data to write. I have got somewhat working save it disk as a *.tga, but when saving as *.bmp it renders incorrectly. I believe that the size of byte[] is incorrect and that my data is truncated. Any hints/tips/ideas on what is going on here would be greatly appreciated. Links to articles explaining byte layout and pixel formats etc. would be helpful. Thanks!! C++/CLI code. FT_Bitmap *bitmap = &face->glyph->bitmap; int width = (face->bitmap->metrics.width / 64); int height = (face->bitmap->metrics.height / 64); // must be aligned on a 32 bit boundary or 4 bytes int depth = 8; int stride = ((width * depth + 31) & ~31) >> 3; int bytes = (int)(stride * height); // as *.tga void *buffer = bytes ? malloc(bytes) : NULL; if (buffer) { memset(buffer, 0, bytes); for (int i = 0; i < glyph->rows; ++i) memcpy((char *)buffer + (i * width), glyph->buffer + (i * glyph->pitch), glyph->pitch); WriteTGA("Test.tga", buffer, width, height); } array<Byte>^ values = gcnew array<Byte>(bytes); Marshal::Copy((IntPtr)glyph->buffer, values, 0, bytes); // as *.bmp Bitmap^ systemBitmap = gcnew Bitmap(width, height, PixelFormat::Format24bppRgb); // create bitmap data, lock pixels to be written. BitmapData^ bitmapData = systemBitmap->LockBits(Rectangle(0, 0, width, height), ImageLockMode::WriteOnly, bitmap->PixelFormat); Marshal::Copy(values, 0, bitmapData->Scan0, bytes); systemBitmap->UnlockBits(bitmapData); systemBitmap->Save("Test.bmp"); Reference, FT_Bitmap typedef struct FT_Bitmap_ { int rows; int width; int pitch; unsigned char* buffer; short num_grays; char pixel_mode; char palette_mode; void* palette; } FT_Bitmap; Reference, WriteTGA bool WriteTGA(const char *filename, void *pxl, uint16 width, uint16 height) { FILE *fp = NULL; fopen_s(&fp, filename, "wb"); if (fp) { TGAHeader header; memset(&header, 0, sizeof(TGAHeader)); header.imageType = 3; header.width = width; header.height = height; header.depth = 8; header.descriptor = 0x20; fwrite(&header, sizeof(header), 1, fp); fwrite(pxl, sizeof(uint8) * width * height, 1, fp); fclose(fp); return true; } return false; }

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  • Scope quandary with namespaces, function templates, and static data

    - by Adrian McCarthy
    This scoping problem seems like the type of C++ quandary that Scott Meyers would have addressed in one of his Effective C++ books. I have a function, Analyze, that does some analysis on a range of data. The function is called from a few places with different types of iterators, so I have made it a template (and thus implemented it in a header file). The function depends on a static table of data, AnalysisTable, that I don't want to expose to the rest of the code. My first approach was to make the table a static const inside Analysis. namespace MyNamespace { template <typename InputIterator> int Analyze(InputIterator begin, InputIterator end) { static const int AnalysisTable[] = { /* data */ }; ... // implementation uses AnalysisTable return result; } } // namespace MyNamespace It appears that the compiler creates a copy of AnalysisTable for each instantiation of Analyze, which is wasteful of space (and, to a small degree, time). So I moved the table outside the function like this: namespace MyNamespace { const int AnalysisTable[] = { /* data */ }; template <typename InputIterator> int Analyze(InputIterator begin, InputIterator end) { ... // implementation uses AnalysisTable return result; } } // namespace MyNamespace There's only one copy of the table now, but it's exposed to the rest of the code. I'd rather keep this implementation detail hidden, so I introduced an unnamed namespace: namespace MyNamespace { namespace { // unnamed to hide AnalysisTable const int AnalysisTable[] = { /* data */ }; } // unnamed namespace template <typename InputIterator> int Analyze(InputIterator begin, InputIterator end) { ... // implementation uses AnalysisTable return result; } } // namespace MyNamespace But now I again have multiple copies of the table, because each compilation unit that includes this header file gets its own. If Analyze weren't a template, I could move all the implementation detail out of the header file. But it is a template, so I seem stuck. My next attempt was to put the table in the implementation file and to make an extern declaration within Analyze. // foo.h ------ namespace MyNamespace { template <typename InputIterator> int Analyze(InputIterator begin, InputIterator end) { extern const int AnalysisTable[]; ... // implementation uses AnalysisTable return result; } } // namespace MyNamespace // foo.cpp ------ #include "foo.h" namespace MyNamespace { const int AnalysisTable[] = { /* data */ }; } This looks like it should work, and--indeed--the compiler is satisfied. The linker, however, complains, "unresolved external symbol AnalysisTable." Drat! (Can someone explain what I'm missing here?) The only thing I could think of was to give the inner namespace a name, declare the table in the header, and provide the actual data in an implementation file: // foo.h ----- namespace MyNamespace { namespace PrivateStuff { extern const int AnalysisTable[]; } // unnamed namespace template <typename InputIterator> int Analyze(InputIterator begin, InputIterator end) { ... // implementation uses PrivateStuff::AnalysisTable return result; } } // namespace MyNamespace // foo.cpp ----- #include "foo.h" namespace MyNamespace { namespace PrivateStuff { const int AnalysisTable[] = { /* data */ }; } } Once again, I have exactly one instance of AnalysisTable (yay!), but other parts of the program can access it (boo!). The inner namespace makes it a little clearer that they shouldn't, but it's still possible. Is it possible to have one instance of the table and to move the table beyond the reach of everything but Analyze?

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  • Improving the performance of XSL

    - by Rachel
    In the below XSL for the variable "insert-data", I have an input param with the structure, <insert-data> <data compareIndex="4" nodeName="d1e1"> <a/> </data> <data compareIndex="5" nodeName="d1e1"> <b/> </data> <data compareIndex="7" nodeName="d1e2"> <a/> </data> <data compareIndex="9" nodeName="d1e2"> <b/> </data> </insert-data> where "nodeName" is the id of a node and "compareIndex" is the position of the text content relative to the node having id "$nodeName". I am using the below XSL to select all the text nodes(generate-id) that satisfy the above condition and construct a data xml. The below implementation works perfectly but the time taken for the execution is in min. Is there a better way of implementing or is there any in-efficient operation being used. From my observation the code where the preceding text length is calculated consumes the major time. Please share your thoughts to improve the performance of the XSL. I am using Java SAXON XSL transformer. <xsl:variable name="insert-data" as="element()*"> <xsl:for-each select="$insert-file/insert-data/data"> <xsl:sort select="xsd:integer(@index)"/> <xsl:variable name="compareIndex" select="xsd:integer(@compareIndex)" /> <xsl:variable name="nodeName" select="@nodeName" /> <xsl:variable name="nodeContent" as="node()"> <xsl:copy-of select="node()"/> </xsl:variable> <xsl:for-each select="$main-root/*//text()[ancestor::*[@id = $nodeName]]"> <xsl:variable name="preTextLength" as="xsd:integer" select="sum((preceding::text())[. ancestor::*[@id = $nodeName]]/string-length(.))" /> <xsl:variable name="currentTextLength" as="xsd:integer" select="string-length(.)" /> <xsl:variable name="sum" select="$preTextLength + $currentTextLength" as="xsd:integer"></xsl:variable> <xsl:variable name="split-index" select="$compareIndex - $preTextLength" as="xsd:integer"></xsl:variable> <xsl:if test="($sum ge $compareIndex) and ($compareIndex gt $preTextLength)"> <data split-index="{$split-index}" text-id="{generate-id(.)}"> <xsl:copy-of select="$nodeContent"/> </data> </xsl:if> </xsl:for-each> </xsl:for-each> </xsl:variable>

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  • boost::serialization of mutual pointers

    - by KneLL
    First, please take a look at these code: class Key; class Door; class Key { public: int id; Door *pDoor; Key() : id(0), pDoor(NULL) {} private: friend class boost::serialization::access; template <typename A> void serialize(A &ar, const unsigned int ver) { ar & BOOST_SERIALIZATION_NVP(id) & BOOST_SERIALIZATION_NVP(pDoor); } }; class Door { public: int id; Key *pKey; Door() : id(0), pKey(NULL) {} private: friend class boost::serialization::access; template <typename A> void serialize(A &ar, const unsigned int ver) { ar & BOOST_SERIALIZATION_NVP(id) & BOOST_SERIALIZATION_NVP(pKey); } }; BOOST_CLASS_TRACKING(Key, track_selectively); BOOST_CLASS_TRACKING(Door, track_selectively); int main() { Key k1, k_in; Door d1, d_in; k1.id = 1; d1.id = 2; k1.pDoor = &d1; d1.pKey = &k1; // Save data { wofstream f1("test.xml"); boost::archive::xml_woarchive ar1(f1); // !!!!! (1) const Key *pK = &k1; const Door *pD = &d1; ar1 << BOOST_SERIALIZATION_NVP(pK) << BOOST_SERIALIZATION_NVP(pD); } // Load data { wifstream i1("test.xml"); boost::archive::xml_wiarchive ar1(i1); // !!!!! (2) A *pK = &k_in; B *pD = &d_in; // (2.1) //ar1 >> BOOST_SERIALIZATION_NVP(k_in) >> BOOST_SERIALIZATION_NVP(d_in); // (2.2) ar1 >> BOOST_SERIALIZATION_NVP(pK) >> BOOST_SERIALIZATION_NVP(pD); } } The first (1) is a simple question - is it possible to pass objects to archive without pointers? If simply pass objects 'as is' that boost throws exception about duplicated pointers. But I'm confused of creating pointers to save objects. The second (2) is a real trouble. If comment out string after (2.1) then boost will corectly load a first Key object (and init internal Door pointer pDoor), but will not init a second Door (d_in) object. After this I have an inited *k_in* object with valid pointer to Door and empty *d_in* object. If use string (2.2) then boost will create two Key and Door objects somewhere in memory and save addresses in pointers. But I want to have two objects *k_in* and *d_in*. So, if I copy a values of memory objects to local variables then I store only addresses, for example, I can write code after (2.2): d_in.id = pD->id; d_in.pKey = pD->pKey; But in this case I store only a pointer and memory object remains in memory and I cannot delete it, because *d_in.pKey* will be unvalid. And I cannot perform a deep copy with operator=(), because if I write code like this: Key &operator==(const Key &k) { if (this != &k) { id = k.id; // call to Door::operator=() that calls *pKey = *d.pKey and so on *pDoor = *k.pDoor; } return *this; } then I will get a something like recursion of operator=()s of Key and Door. How to implement proper serialization of such pointers?

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  • Input string was not in a correct format.

    - by Jon
    I have this error which doesn't happen on my local machine but it does when the code is built by our build sever and deployed to the target server. I can't work out what the problem is, after having spent many hours on this issue. Here is an error trace: [FormatException: Input string was not in a correct format.] System.Number.StringToNumber(String str, NumberStyles options, NumberBuffer& number, NumberFormatInfo info, Boolean parseDecimal) +7469351 System.Number.ParseInt32(String s, NumberStyles style, NumberFormatInfo info) +119 System.Byte.Parse(String s, NumberStyles style, NumberFormatInfo info) +35 System.String.System.IConvertible.ToByte(IFormatProvider provider) +46 System.Convert.ChangeType(Object value, TypeCode typeCode, IFormatProvider provider) +199 System.Web.UI.WebControls.Parameter.GetValue(Object value, String defaultValue, TypeCode type, Boolean convertEmptyStringToNull, Boolean ignoreNullableTypeChanges) +127 System.Web.UI.WebControls.Parameter.GetValue(Object value, Boolean ignoreNullableTypeChanges) +66 System.Web.UI.WebControls.ParameterCollection.GetValues(HttpContext context, Control control) +285 System.Web.UI.WebControls.SqlDataSourceView.InitializeParameters(DbCommand command, ParameterCollection parameters, IDictionary exclusionList) +251 System.Web.UI.WebControls.SqlDataSourceView.ExecuteSelect(DataSourceSelectArguments arguments) +476 System.Web.UI.WebControls.SqlDataSource.Select(DataSourceSelectArguments arguments) +19 Customer_NewTenancyList.BindReport(GridSortEventArgs e) +442 Customer_NewTenancyList.Page_Load(Object sender, EventArgs e) +345 System.Web.UI.Control.OnLoad(EventArgs e) +73 baseRslpage.OnLoad(EventArgs e) +16 System.Web.UI.Control.LoadRecursive() +52 System.Web.UI.Page.ProcessRequestMain(Boolean includeStagesBeforeAsyncPoint, Boolean includeStagesAfterAsyncPoint) +2170 Here is my own trace: Begin PreInit aspx.page End PreInit 3.12888928620816E-05 0.000031 aspx.page Begin Init 7.43111205474439E-05 0.000043 aspx.page End Init 0.00122138428208054 0.001147 aspx.page Begin InitComplete 0.00125379063540199 0.000032 aspx.page End InitComplete 0.00127781603527823 0.000024 aspx.page Begin PreLoad 0.00131022238859967 0.000032 aspx.page End PreLoad 0.00133424778847591 0.000024 aspx.page Begin Load 0.00135575890231859 0.000022 Page_Load 0.00145996209015392 0.000104 BindReport 0.0014856636807192 0.000026 Parameters add start: 30/03/2010 30/04/2010 0.0015569017850034 0.000071 Parameters add ended 0.00160048274291844 0.000044 Trace 1 0.00162450814279468 0.000024 Unhandled Execution Error Input string was not in a correct format. at System.Number.StringToNumber(String str, NumberStyles options, NumberBuffer& number, NumberFormatInfo info, Boolean parseDecimal) at System.Number.ParseInt32(String s, NumberStyles style, NumberFormatInfo info) at System.Byte.Parse(String s, NumberStyles style, NumberFormatInfo info) at System.String.System.IConvertible.ToByte(IFormatProvider provider) at System.Convert.ChangeType(Object value, TypeCode typeCode, IFormatProvider provider) at System.Web.UI.WebControls.Parameter.GetValue(Object value, String defaultValue, TypeCode type, Boolean convertEmptyStringToNull, Boolean ignoreNullableTypeChanges) at System.Web.UI.WebControls.Parameter.GetValue(Object value, Boolean ignoreNullableTypeChanges) at System.Web.UI.WebControls.ParameterCollection.GetValues(HttpContext context, Control control) at System.Web.UI.WebControls.SqlDataSourceView.InitializeParameters(DbCommand command, ParameterCollection parameters, IDictionary exclusionList) at System.Web.UI.WebControls.SqlDataSourceView.ExecuteSelect(DataSourceSelectArguments arguments) at System.Web.UI.WebControls.SqlDataSource.Select(DataSourceSelectArguments arguments) at Customer_NewTenancyList.BindReport(GridSortEventArgs e) at Customer_NewTenancyList.Page_Load(Object sender, EventArgs e) at System.Web.UI.Control.OnLoad(EventArgs e) at baseRslpage.OnLoad(EventArgs e) at System.Web.UI.Control.LoadRecursive() at System.Web.UI.Page.ProcessRequestMain(Boolean includeStagesBeforeAsyncPoint, Boolean includeStagesAfterAsyncPoint) And here is my code: Trace.Warn("BindReport") Dim sds As New SqlDataSource sds.SelectCommand = "C_MYSTORED_PROC" sds.ConnectionString = ConfigurationManager.ConnectionStrings("connstring").ConnectionString sds.SelectCommandType = SqlDataSourceCommandType.StoredProcedure Trace.Warn(String.Format("Parameters add start: {0} {1}", dpFrom.Text, dpTo.Text)) sds.SelectParameters.Add(New Parameter("FROMDATE", DbType.DateTime, dpFrom.Text)) sds.SelectParameters.Add(New Parameter("TODATE", DbType.DateTime, dpTo.Text)) Trace.Warn("Parameters add ended") Dim dv As DataView Dim dt As DataTable Trace.Warn("Trace 1") dv = sds.Select(New DataSourceSelectArguments()) Trace.Warn("Trace 2") If e IsNot Nothing Then dv.Sort = String.Format("{0} {1}", e.SortField, e.SortDirection) Trace.Warn("Trace 3") Else gvReport.CurrentSortColumnIndex = 0 gvReport.Columns(0).SortDirection = "DESC" Trace.Warn("Trace 4") End If Trace.Warn("Trace 5") dt = dv.ToTable() Cache("NewTenancyList") = dt Trace.Warn("Trace 6") Trace.Warn("About to databind") gvReport.DataSource = dt gvReport.DataBind() Trace.Warn("Databinded") What I don't understand and this is really weird, why does it work on my local machine but not on the live server? If i build the code on my local machine then copy over the complete \bin directory it works. If I pull the code from source safe, build then copy, I get this error. It seems to choke after the line "dv = sds.Select(New DataSourceSelectArguments())" in the code.

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  • Set attribute to all child elements via xsl:choose

    - by Camal
    Hi, assuming I got following XML file : <?xml version="1.0" encoding="ISO-8859-1" ?> <MyCarShop> <Car gender="Boy"> <Door>Lamborghini</Door> <Key>Skull</Key> </Car> <Car gender="Girl"> <Door>Normal</Door> <Key>Princess</Key> </Car> </MyCarShop> I want to perform a transformation so the xml looks like this : <?xml version="1.0" encoding="ISO-8859-1" ?> <MyCarShop> <Car gender="Boy"> <Door color="blue">Lamborghini</Door> <Key color="blue">Skull</Key> </Car> <Car gender="Girl"> <Door color="red">Normal</Door> <Key color="red">Princess</Key> </Car> </MyCarShop> So I want to add a color attribut to each subelement of Car depending on the gender information. I came up with this XSLT but it doesnt work : <?xml version="1.0" encoding="utf-8"?> <xsl:stylesheet version="1.0" xmlns:xsl="http://www.w3.org/1999/XSL/Transform" xmlns:msxsl="urn:schemas-microsoft-com:xslt" exclude-result-prefixes="msxsl" > <xsl:output method="xml" indent="yes"/> <!--<xsl:template match="@* | node()"> <xsl:copy> <xsl:apply-templates select="@* | node()"/> </xsl:copy> </xsl:template>--> <xsl:template match="/"> <xsl:element name="MyCarShop"> <xsl:attribute name="version">1.0</xsl:attribute> <xsl:apply-templates/> </xsl:element> </xsl:template> <xsl:template match="Car"> <xsl:element name="Car"> <xsl:apply-templates/> </xsl:element> </xsl:template> <xsl:template match="Door"> <xsl:element name="Door"> <xsl:attribute name="ViewSideIndicator"> <xsl:choose> <xsl:when test="gender = 'Boy' ">Front</xsl:when> <xsl:when test="gender = 'Girl ">Front</xsl:when> </xsl:choose> </xsl:attribute> </xsl:element> </xsl:template> <xsl:template match="Key"> <xsl:element name="Key"> <xsl:apply-templates/> </xsl:element> </xsl:template> </xsl:stylesheet> Does anybody know what might be wrong ? Thanks again!

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