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• std::for_each on a member function with 1 argument

  - by Person

  I'm wondering how to implement what is stated in the title. I've tried something like... std::for_each( a.begin(), a.end(), std::mem_fun_ref( &myClass::someFunc ) ) but I get an error saying that the "term" (I"m assuming it means the 3rd argument) doesn't evaluate to a function with 1 argument, even though someFunc does take one argument - the type of the objects stored in a. I'm wondering if what I'm trying to do is possible using the standard library (I know I can do it easily using boost). P.S. Does using for_each and mem_fun_ref have any performance implications in comparison to just iterating through a manually and passing the object to someFunc?

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• Strategy for developing namespaced and non-namespaced versions of same PHP code

  - by porneL

  I'm maintaining library written for PHP 5.2 and I'd like to create PHP 5.3-namespaced version of it. However, I'd also keep non-namespaced version up to date until PHP 5.3 becomes so old, that even Debian stable ships it ;) I've got rather clean code, about 80 classes following Project_Directory_Filename naming scheme (I'd change them to \Project\Directory\Filename of course) and only few functions and constants (also prefixed with project name). Question is: what's the best way to develop namespaced and non-namespaced versions in parallel? Should I just create fork in repository and keep merging changes between branches? Are there cases where backslash-sprinkled code becomes hard to merge? Should I write script that converts 5.2 version to 5.3 or vice-versa? Should I use PHP tokenizer? sed? C preprocessor? Is there a better way to use namespaces where available and keep backwards compatibility with older PHP?

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• How to flush data in php and disconnect user but keep the script alive

  - by Rodrigo

  This is a trick question, while developing a php+ajax application i felt into some long queries, nothing wrong with them, but they could be done in background. I know that there's a way to just send a reply to user while throwing the real processing to another process by exec(), however it dosen't feels right for me, this might generate exploits and it's not pratical on making it compatible with virtual servers and cross platform. PHP offers the ob_* functions although they help on flushing the cache, but the user will keep connected until the script is running. I'm wondering if there's an alternate to exec to keep a script running after sending data to user and closing connection/thread with apache, or a less "dirty" way to have processing data sent to another script.

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• What is a good approach for a Data Access Layer?

  - by Adil Mughal

  Our software is a customized Human Resource Management System (HRMS) using ASP.NET with Oracle as the database and now we are actually moving to make it a product that supports multiple tenants with their own databases. Our options: Use NHibernate to support Multiple databases and use of OO. But we concern related to NHibernate learning curve and any problem we faced. Make a generalized DAL which will continue working with Oracle using stored procedures and use tools to convert it to other databases such as SQL Server or MySql. There is a risk associated with having to support multiple database-dependent versions of a single script. Provide the software as a Service (SaaS) and maintain the way we conduct business. However there can may be clients who do not want or trust the Cloud or other SaaS business models. With this in mind, what's the best Data access layer technique?

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• Including a NSUserDefault password test in 1st Tab.m to load a loginView gives eror?

  - by Michael Robinson

  I have a name and password in NSUserDefaults for login. I have this in my 1stTab View.m class to test for presence and load a login/signup loginView.xib modally if there is no password or name stored in the app. Here is the pulling of the defaults: -(void)refreshFields { NSUserDefaults *defaults = [NSUserDefaults standardUserDefaults]; usernameLabel.text = [defaults objectForKey:kUsernameKey]; passwordLabel.text = [defaults objectForKey:kPasswordKey]; { Here is the Test: - (void)viewDidAppear:(BOOL)animated { [self refreshFields]; [super viewDidAppear:animated]; if ([usernameLabel.text length] == 0 || [passwordLabel.text length] == 0) { LoginViewController * vc = [[[LoginViewController alloc] initWithNibName:@"LoginView" bundle:nil] autorelease]; [self presentModalViewController:vc animated: false]; } else { [[self tableView ]reloadData]; } } Thanks in advance, I'm getting this error in the console: * Terminating app due to uncaught exception 'NSUnknownKeyException', reason: '[ setValue:forUndefinedKey:]: this class is not key value coding-compliant for the key usernameLabel.'

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• How to disable log4j logging from Java code

  - by Erel Segal Halevi

  I use a legacy library that writes logs using log4j. My default log4j.properties file directs the log to the console, but in some specific functions of my main program, I would like to disable logging altogether (from all classes). I tried this: Logger.getLogger(BasicImplementation.class.getName()).setLevel(Level.OFF); where "BasicImplementation" is one of the main classes that does logging, but it didn't work - the logs are still written to the console. Here is my log4j.properties: log4j.rootLogger=warn, stdout log4j.logger.ac.biu.nlp.nlp.engineml=info, logfile log4j.logger.org.BIU.utils.logging.ExperimentLogger=warn log4j.appender.stdout = org.apache.log4j.ConsoleAppender log4j.appender.stdout.layout = org.apache.log4j.PatternLayout log4j.appender.stdout.layout.ConversionPattern = %-5p %d{HH:mm:ss} [%t]: %m%n log4j.appender.logfile = ac.biu.nlp.nlp.log.BackupOlderFileAppender log4j.appender.logfile.append=false log4j.appender.logfile.layout = org.apache.log4j.PatternLayout log4j.appender.logfile.layout.ConversionPattern = %-5p %d{HH:mm:ss} [%t]: %m%n log4j.appender.logfile.File = logfile.log

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• File IO, Handling CRLF

  - by aCuria

  Hi, i am writing a program that takes a file and splits it up into multiple small files of a user specified size, then join the multiple small files back again. 1) the code must work for c, c++ 2) i am compiling with multiple compilers. I am reading and writing to the files by using the stl functions fread() and fwrite() The problem I am having pertains to CRLF. If the file I am reading from contains CRLF, then I want to retain it when i split and join the files back together. If the file contains LF, then i want to retain LF. Unfortunately, fread() seems to store CRLF as \n (I think), and whatever is written by fwrite() is compiler-dependent. How do i approach this problem? Thanks.

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• While Loop Taking Alot of CPU Usage

  - by CuriousUser

  I am creating a keystroke logger for my personal interest, as well wanting to know how to capture and use them as functions (like key shortcuts). I got the code to learn how keylogger and GetAsyncKeyState() work: http://www.rohitab.com/discuss/index.php?showtopic=9931 I got it to run under Code::Blocks, but the weirdest things is that when I check my task manager, my CPU Usage rises to 100%. When I close the program, it goes back down, and goes back up to 100 when I turn it back on. I presume it's because of the infinite while loop, constantly checking for inputs, but I wanna know if there's anyway to decrease the CPU usage, without losing function. P.S How would I make a key shortcut? Like press (Ctrl + E) to make the program exit?

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• How can you determine if Control.Visible is set via property or if the value is inherited

  - by JDMX

  I need to find a way to determine if the Visible property of a control is set via a property change or if is inheriting it value from its parent. Using the Reflector, I find that the functions this.GetVisibleCore() and this.GetState() are both internal methods so I cannot call them. The widgets themselves are created dynamically so I do not want to attach a method to the VisibleChanged event just after the creation of each widget so can try to monitor this property. If I have to, I guess I will but I am looking for something jsut a bit more elegant.

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• in asp.net mvc is it possible to register routes somewhere other than application.Start()

  - by joe q.

  Hi, is it possible to create and register routes after Application.Start() is called? let's say have a controller, PersonController. With default routing, URLs could look something like www.site.com/Person/Edit/4, with 'Person' matching the controller. now imagine I have several users, some may prefer we use the term 'Friends'. I would like to use the same controller, and have /Friends/Edit/4 map to the same controller/action/id. Maybe someone else prefers /Comrades/Edit/4. with the naming preferences stored in a database, is there a way that I can dynamically create these routes at some point mid-application, after the user has logged in? thanks!

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• PHP APC - Why is loading cached array op codes slow?

  - by Aaron Kreider

  I'm using APC to reduce my loading time for my PHP files. My files load very fast, except for one file where I define more than 100 arrays. This 270 kb file takes 200 ms to load. The rest of the files are full of objects, methods, and functions. I'm wondering: does OP code caching not work as well for arrays? My APC cache should be big enough to handle all of my classes. Currently 40% of my cache is free. My hit rate is 99%. apc.shm_size=32 M apc.max_file_size = 1M apc.shm_segments= 1 APC 3.1.6 I'm using PHP 5.2, Apache 2, and Windows Vista.

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• Best way to get record counts grouped by month, adjusted for time zone, using SQL or LINQ to SQL

  - by Jeff Putz

  I'm looking for the most efficient way to suck out a series of monthly counts of records in my database, but adjusting for time zone, since the times are actually stored as UTC. I would like my result set to be a series of objects that include month, year and count. I have LINQ to SQL objects that looks something like this: public class MyRecord { public int ID { get; set; } public DateTime TimeStamp { get; set; } public string Data { get; set; } } I'm not opposed to using straight SQL, but LINQ to SQL would at least keep the code a lot more clean. The time zone adjustment is available as an integer (-5, for example). Again, the result set what I'm looking for is objects containing the month, year and count, all integers. Any suggestions? I can think of several ways to do it straight, but not with a time zone adjustment.

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• How to grant permissions to single SELECT/UPDATE statment (sql server) ?

  - by Albert

  I have a problem when trying to execute this update statement (below) using C# SqlCommand when I execute it locally it works fine, but when deployed to another machine I got a permission error The SELECT permission was denied on the object Order ... The UPDATE permission was denied on the object Order ... Update Statement "UPDATE Order SET Request = @request WHERE Id = @ID"; Is there any way to add GRANT SELECT and GRANT UPDATE to a single statement like the update above without using a stored procedure? or the SP is the way to go on this? Thanks in advance

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• P/Invoke or C++/CLI for wrapping a C library

  - by Ian G

  Have a moderate size (40-odd function) C API that needs to be called from a C# project. The functions logically break up to form a few classes that will be API presented to the rest of the project. Are there any objective reasons to prefer P/Invoke or C++/CLI for the interoperability underneath that API, in terms of robustness, maintainability, deployment, ...? The issues I could think of that might be, but aren't problematic are: C++/CLI will require an separate assembly, the P/Invoke classes can be in the main assembly. (We've already got multiple assemblies and there'll be the C dlls anyway so not a major issue). Performance doesn't seem differ noticeable between the two methods. Issues that I'm not sure about are: My feeling is C++/CLI will be easier to debug if there's inter-op problem, is this true? Language familiarity enough people know C# and C++ but knowledge of details of C++/CLI are rarer here. Anything else?

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• Suggest an Alternative for glTranslate() load on CPU.

  - by Nagaraj

  I have been working on a project of OpenGL. Here I just display a boat moving along with some option's for view change.. Its a 2D program. The thing is I have used many glTranslate functions for moving the boat in the code. It works properly in Windows(DEV-CPP) but when executed in Fedora it has a very very very slow movement for boat. When checked for the CPU LOAD it was huge. So any thing which i can try to move the boat faster? Please help :)

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• Is Pex (Test generation) really usefull tool?

  - by Yauheni Sivukha

  Yes, it is possible to generate tests on boundary values for functions like "Sum" or "Divide". Pex is a good tool here. But more often we create tests on business behaviour. Let's consider example from classic Beck's tdd book: [Test] public void ShouldRoundOnCreation() { Money money = new Money(20.678); Assert.AreEqual(20.68,money.Amount); Assert.AreEqual(2068,money.Cents); } Can this test be generated? No :) 95 % of tests in my projects check business logic, and can not be generated. Pex (Especially in pair with Moles) can give 100% code coverage, but a high code coverage rate of a test suite does never indicate, that code is well tested - It only gives false confidence that everything is tested. And this is very dangerous. So, the question is - Is Pex really usefull tool?

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• C/C++ - Convert 24-bit signed integer to float

  - by e-t172

  I'm programming in C++. I need to convert a 24-bit signed integer (stored in a 3-byte array) to float (normalizing to [-1.0,1.0]). The platform is MSVC++ on x86 (which means the input is little-endian). I tried this: float convert(const unsigned char* src) { int i = src[2]; i = (i << 8) | src[1]; i = (i << 8) | src[0]; const float Q = 2.0 / ((1 << 24) - 1.0); return (i + 0.5) * Q; } I'm not entirely sure, but it seems the results I'm getting from this code are incorrect. So, is my code wrong and if so, why?

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• Qt grabWindow coordinates shifted from GetCursorPos and GetWindowRect

  - by user1391

  In Qt, when I use the QPixmap::grabWindow(hwnd,x,y,h,w) function, the coordinates are shifted slightly, when compared to the coordinates using the windows api functions GetCursorPos and GetWindowRect. i.e. (0,0) from the point of view of GetCursorPos and GetWindowRect is at the very top left of the toolbar at the top of the window. But (0,0) for QPixmap::grabWindow is more "inside" (i.e. ignoring the window frame). How can I make these 2 coordinates consistent? Especially since the user might have different thicknesses for the window frame?

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• Determine cluster size of file system in Python

  - by Philip Fourie

  I would like to calculate the "size on disk" of a file in Python. Therefore I would like to determine the cluster size of the file system where the file is stored. How do I determine the cluster size in Python? Or another built-in method that calculates the "size on disk" will also work. I looked at os.path.getsize but it returns the file size in bytes, not taking the FS's block size into consideration. I am hoping that this can be done in an OS independent way...

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• Recursive compilation using gcc

  - by curiousexplorer

  I am using the gcc compiler. My project source tree looks like somewhat like this test$~: tree . . |-- folder | |-- hello.cpp | `-- hello.h `-- main.cpp 1 directory, 3 files test$~: The file main.cpp contains the main() function and all the functions invoked by main.cpp lie in the directory named folder So far in all my little projects I never had to put some source code under a sub-directory. What I am looking for, in short, is some gcc command for recursive compilation in sub-directories and their subdirectories and so on... This command should be invoked from the home directory of the code project.

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• database logic for tracking each and every operation in my web application

  - by ripa

  I am developing an Web application. In my application, I need to keep track of each and every operation for every logged in user. I have planned following for achieving this task:- I will create stored procedure in mysql. I will trigger this procedure on each table's insert , update delete. This is an tough job for me. Will anybody direct me in the right way? I am using PHP based Codeigniter framework and mysql database.

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• Get ExternalInterface definitions in Javascript

  - by Jamal Fanaian

  Is there a way to get a list of the exposed functions from a Flash object? For example, you could get a list of all methods in an object by executing: for (var i in object) { if (typeof object[i] == "function") { console.log(i); } } The only issue is that this won't expose any methods registered through the ExternalInterfaces API. I can try and see if the function exists (object['method']) and it tells me it is a function, but I would have to guess every existing method in this manner. NOTE: Obviously, I don't have access to the actionscript.

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• How to call a Biztalk net.TCP service from Raw TCP request?

  - by Burhan

  I have written a net.tcp based service in Biztalk 2006 R2 and it listens at a location, http://localhost:5060/WCFTcpService I need to call this service by using Raw TCP request. i.e. I don't want to create a proxy class and consume it in a .NET client application. How can I be able to do this? The real scenario is that an Oracle Stored procedure will be used to communicate with this service and the only way I am allowed to call this service is to send a TCP request to the Biztalk server that is hosting the service. Any help or tips would be really appreciated. Thanks.

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• Looking for a syntactic shortcut for accessing dictionaries

  - by Sisiutl

  I have an abstract base class that holds a Dictionary. I'd like inherited classes to be able to access the dictionary fields using a convenient syntax. Currently I have lots of code like this: string temp; int val; if (this.Fields.TryGetValue("Key", out temp)) { if (int.TryParse(temp, out val)) { // do something with val... } } Obviously I can wrap this in utility functions but I'd like to have a cool, convenient syntax for accessing the dictionary fields where I can simply say something like: int result = @Key; Is there any way to do something like this in C# (3.5)?

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• In SQL Server merge replication, how does reinitializing work?

  - by Craig Shearer

  I have set up a pull subscription to a merge publication in SQL Server. I use parameterized row filters on some tables. This works fine with the initial synchronization - just the rows using the filter arrive in the replicated (client) database. However, at some later point I'd like to be able to synchronize the replicated database again from the server and have new rows that match the parameterized row filters appear on the client database. The doucmentation seems to indicate that I can call Reinitialize() to do this. However, when I do try this and Synchronize again, I get an error saying that the script 'snapshot.pre' cannot be applied to the database. I've inspected the script and can see why - it's trying to drop some functions are used by the tables in the database. It would appear that for Reinitialize() to work it requires that the database be blank. Am I misunderstanding something here? Is there a way to make this work?

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