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• Should app using VCL migrate?

  - by Fdr

  Is VCL dead, or does it have a future as a GUI library? As CLX ended, is there any chance for cross-platform support in future releases? I've had to do some work with legacy app that uses Borland's VCL(BCB6). Now that new features have to be implemented, it's necessary to revalue alternatives. Whether to stick with VCL or migrate to some other library/framework. I've never read much what's happening in the field Embarcadero(Borland) tools. At least there seems to be only few VCL tagged questions here in SO and no much luck with google either.

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• J2EE: Default values for custom tag attributes

  - by Nick

  So according to Sun's J2EE documentation (http://docs.sun.com/app/docs/doc/819-3669/bnani?l=en&a=view), "If a tag attribute is not required, a tag handler should provide a default value." My question is how in the hell do I define a default value as per the documentation's description. Here's the code: <%@ attribute name="visible" required="false" type="java.lang.Boolean" %> <c:if test="${visible}"> My Tag Contents Here </c:if> Obviously, this tag won't compile because it's lacking the tag directive and the core library import. My point is that I want the "visible" property to default to TRUE. The "tag attribute is not required," so the "tag handler should provide a default value." I want to provide a default value, so what am I missing? Any help is greatly appreciated.

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• Best way to style GWT widgets in a library

  - by helios

  I'm developing some widgets into a library for internal use at the company I work for. I don't know what's the recommended way to style the widgets. There are at least these ways: use Widget.setPrimaryStyleName and let the user provide an external css. We use maven archetypes to build applications so we can provide default styles. Anyway I don't like it very much. use the GWT 2.0 CssResourceBundle. So we can compile the CSS into the module and it will be optimized (and it can be browser-dependant too). provide a module with the styling. Something like the default GWT themes. But I don't know how exactly this works. I want to: make the components as cohesive as I can (don't depend on externally included css's) leave open the door to modify styles (if I want to change the way some widget looks in a concrete application). What's your experience in this subject?

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• How can I change or remove HttpRequest input arguments in a HttpModule

  - by Eric Gunn

  Is it possible to change or remove http request form inputs in an httpmodule? My goal is to create a security IHttpmodule that will check the request for reasonable values, such as limits on acceptable input and query parameter length, or use the AntiXSS Sanitizer to remove threats, log potential hack attempts, etc. before a request is passed on to a processor. Because this is a cross cutting concern I'd prefer to find a solution that applies to all requests and affects all ways request values could be accessed, Reqest.Form, Action(model), Action(FormCollection), HttpContext.Current.Request.Form, etc. I'm using MVC and have considered creating custom model binders to clean the data before creating the model instance. But that would be application specific, require remembering to register every model binder and only apply to Action(model).

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• what's the "best" approach to creating the UI of an audio plugin that will be both audio unit and VST for OS X and Windows?

  - by SaldaVonSchwartz

  I'm working on a couple audio plugins. Right now, they are audio units. And while the "DSP" code won't change for the most part between implementations / ports, I'm not sure how to go about the GUI. For instance, I was looking at the Apple-supplied AUs in Lion. Does anyone know how did they go about the UI? Like, are the knobs and controls just subclasses of Cocoa controls? are they using some separate framework or coding these knobs and such from scratch? And then, the plugs I'm working on are going to be available too as VSTs for Windows. I already have them up and running with generic interfaces. But I'm wondering if I should just get over it and recreate all my interfaces with the vstgui code provided by Steinberg or if there's a more practical approach to making the interfaces cross-platform.

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• Boost multiindex complex struct

  - by StrifeLow

  In boost multiindex example complex_structs, it use one key in the car_manufacturer struct for car_table. If car_manufacturer have been modify to have 2 ID struct car_manufacturer { std::string name; int cm_code; car_manufacturer(const std::string& name_, const int& cm_code_):name(name_), cm_code(cm_code_){} }; What will be the key_from_key struct looks like? Have try to add another KeyExtractor or use composite index inside key_from_key, but still cannot compile. Please help on this. Thanks.

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• Strange error: cannot convert from 'int' to 'ios_base::openmode'

  - by Dylan Klomparens

  I am using g++ to compile some code. I wrote the following snippet: bool WriteAccess = true; string Name = "my_file.txt"; ofstream File; ios_base::open_mode Mode = std::ios_base::in | std::ios_base::binary; if(WriteAccess) Mode |= std::ios_base::out | std::ios_base::trunc; File.open(Name.data(), Mode); And I receive these errors... any idea why? Error 1: invalid conversion from ‘int’ to ‘std::_Ios_Openmode’ Error 2: initializing argument 2 of ‘std::basic_filebuf<_CharT, _Traits* std::basic_filebuf<_CharT, _Traits::open(const char*, std::_Ios_Openmode) [with _CharT = char, _Traits = std::char_traits]’ As far as I could tell from a Google search, g++ is actually breaking the C++ standard here. Which I find quite astonishing, since they generally conform very strictly to the standard. Is this the case? Or am I doing something wrong. My reference for the standard: http://www.cplusplus.com/reference/iostream/ofstream/open/

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• How to update assmebly version info with new build and revision during build?

  - by hrushikesh

  I have to update the build number in assembly version of assemblyinfo.cs file. I have written a custom tasks which updates all the assmeblyinfo.cs under a solution before starting build. But when i change this file and try to build then some of my dlls which has reference of other dlls not able to compile as they dont find the specific version assembly. I have some files which uses strong name assembly also. Not sure how to update their version. I have tried setting specific version to false,but still same error is coming. Can you anybody tell me the good way to update the assemblyinfo.cs with incremental build number? P.S. i am using NANT tasks for automating by builds.

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• Question regarding C++ Templates

  - by Isuru

  I used a simple class for a test program about templates, this is what I did: template <typename T> class test { public: test<T>::test(); T out(); }; template <typename T> test<T>::test() { } T test<T>::out() { } int main() { //test<int> t; } But when I try to compile it says 'T' : undeclared identifier and use of class template requires template argument list , pointing to the same line, where I have implemented the method out() . Can anyone please explain what the problem is?? I'm using visual studio 2008.

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• What does static linking against a library actually do?

  - by Salgar

  Say I had a library called libfoo which contained a class, a few static variables, possibly something with 'C' linkage, and a few other functions. Now I have a main program which looks like this: int main() { return 5+5; } When I compile and link this, I link against libfoo. Will this have any effect? Will my executable increase in size? If so, why? Do the static variables or their addresses get copied into my executable? Apologies if there is a similar question to this or if I'm being particularly stupid in any way.

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• How to mock WCF Web Services with Rhino Mocks.

  - by Will

  How do I test a class that utilizes proxy clients generated by a Web Service Reference? I would like to mock the client, but the generated client interface doesn't contain the close method, which is required to properly terminate the proxy. If I don't use the interface, but instead a concrete reference, I get access to the close method but loose the ability to mock the proxy. I'm trying to test a class similar to this: public class ServiceAdapter : IServiceAdapter, IDisposable { // ILoggingServiceClient is generated via a Web Service reference private readonly ILoggingServiceClient _loggingServiceClient; public ServiceAdapter() : this(new LoggingServiceClient()) {} internal ServiceAdapter(ILoggingServiceClient loggingServiceClient) { _loggingServiceClient = loggingServiceClient; } public void LogSomething(string msg) { _loggingServiceClient.LogSomething(msg); } public void Dispose() { // this doesn't compile, because ILoggingServiceClient doesn't contain Close(), // yet Close is required to properly terminate the WCF client _loggingServiceClient.Close(); } }

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• The case against Maven?

  - by Asgeir S. Nilsen

  Time and time again I've read and heard people frustrated over Maven and how complicated it is. And that it's much easier to use Ant to build code. However, in order to: Compile code Run tests Package a deployable unit This is all you need from Maven: <project> <modelVersion>4.0.0</modelVersion> <groupId>type something here</groupId> <artifactId>type something here</artifactId> <version>type something here</version> </project> What would be the corresponding minimal Ant build file?

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• Has anyone managed to get Visual Studio 2003 running on Windows 7?

  - by Jeremy White

  Yes, I know... I could set up a virtual machine running XP. Unfortunately our build environment is such that we need to be running VC2003, 2005 and 2008 concurrently and it would be much more convenient if I could run 2003 natively on Windows 7 for the few projects we have that require it. I realize some things may not be available in the IDE, but I was able to run 2003 under windows Vista and if I could get the same base level of functionality under Windows 7 I would be extremely happy. Right now I get an error opening the *.pdb file when I compile after switching vc2003 to run as Administrator under compatibility mode for XP SP 2. Thanks!

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• Compiler #defines for g++ and cl

  - by DHamrick

  I am writing a program that is cross platform. There are a few spots where I have to specify an operating system dependent call. #ifdef WINDOWS ..do windows only stuff #endif #ifdef LINUX ..do linux only stuff #endif Are there any preprocesser directives that get defined by the compiler so I don't have to explicitly define them when I use the command line compiler. ie. cl -DWINDOWS program.cpp or g++ -DLINUX program.cpp I realize I could easily write a makefile or have a shell/batch script that will do this automatically. But I would prefer to use the same ones as the compiler (if they exist) by default.

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• c++ Using const in a copy constructor?

  - by Anton

  I have never written copy constructor, so in order to avoid pain i wanted to know if what i have coded is legit. It compiles but i am not sure that it works as a copy constructor should. Also do i have to use const in the copy constructor or i can simply drop it. (What i dont like about const is that the compiler cries if i use some non const functions). //EditNode.h class EditNode { explicit EditNode(QString elementName); EditNode(const EditNode &src); } //EditNodeContainer.h class EditNodeContainer : public EditNode { explicit EditNodeContainer(QString elementName); EditNodeContainer(const EditNodeContainer &src); } //EditNodeContainer.cpp EditNodeContainer::EditNodeContainer(QString elementName):EditNode(elementName) { } //This seems to compile but not sure if it works EditNodeContainer::EditNodeContainer(const EditNodeContainer &src):EditNode(src) { } //the idea whould be to do something like this EditNodeContainer *container1 = new EditNodeContainer("c1"); EditNodeContainer *copyContainer = new EditNodeContainer(container1);

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• Help translating Reflector deconstruction into compilable code

  - by code poet

  So I am Reflector-ing some framework 2.0 code and end up with the following deconstruction fixed (void* voidRef3 = ((void*) &_someMember)) { ... } This won't compile due to 'The right hand side of a fixed statement assignment may not be a cast expression' I understand that Reflector can only approximate and generally I can see a clear path but this is a bit outside my experience. Question: what is Reflector trying to describe to me? Update: Am also seeing the following fixed (IntPtr* ptrRef3 = ((IntPtr*) &this._someMember)) Update: So, as Mitch says, it is not a bitwise operator, but an addressOf operator. Question is now: fixed (IntPtr* ptrRef3 = &_someMember) fails with an 'Cannot implicitly convert type 'xxx*' to 'System.IntPtr*'. An explicit conversion exists (are you missing a cast?)' compilation error. So I seemed to be damned if I do and damned if I dont. Any ideas?

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• What to read as a good intro and quickstart to aspect-oriented programming and metaprogramming?

  - by Ivan

  As I've found myself repeating myself a lot, writing very similar queries and classes for different entities (despite of doing strong object and relational normalisation), etc, I've came to an Idea that I could and should automate the most of this and write an engine which will compile simple declarative models I specify into all the code limiting my job to describe the task and and finally just customise the result as needed. As far as I know this is about metaprogramming and aspect-oriented programming. How do I get acquainted with modern tools available quickly so that I don't invent one more bicycle developing my own?

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• Difference between static const char* and const char*.

  - by Will MacDonagh

  Could someone please explain the difference in how the 2 snippets of code are handled below? They definitely compile to different assembly code, but I'm trying to understand how the code might act differently. I understand that string literals are thrown into read only memory and are effectively static, but how does that differ from the explicit static below? struct Obj1 { void Foo() { const char* str( "hello" ); } }; and struct Obj2 { void Bar() { static const char* str( "hello" ); } };

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• Access to an inner type

  - by sohum

  A colleague of mine posted a question on an internal forum which got me thinking about whether this was possible through C#. Basically, he's got an interface as follows: public interface IProvider<T> { T GetT(); } Is it possible to use something that implements that interface as a type parameter to another generic class and have access to the type T without re-specifying it? For example: public class Foo<P> where P : IProvider<T> { P p; T GetInnerT() { return p.GetT(); } } This does not compile, because the type T is not defined and hence can't be used as a parameter for IProvider. Is something like this even possible? Just curious!

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• Is it possible to use dex2jar converted jar file into your project

  - by swapnil adsure

  i want to use ffmpeg decoder for my android project but i am having lots of error and config problem to compile it. but today i read about apk recompiling by dex2jar. so My question is " it is possible to use that dex2jar.jar file into your project ?. Like is it possible for me to use ffmpeg decoder into my project by importing that jar file into my project?. and same case with vitamio plugin . so if it is possible than i just need to add that plugin jar into my project and link with code and user dont need to download extra plugin. waiting for reply thank you

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• Referenced Assembly won't load

  - by Pavel

  I've got a visual studio 2010 project which publishes an assembly called myAssembly.ddl. I then want to reference myAssembly.dll from an existing vs 2008 project. If I try to load the reference it comes up with an yellow exclamation mark next to it, suggesting that the assembly wasn't loaded. However, I'm not getting any error messages during that process. Obviously, if i try to import the namespace in my code it doesn't compile. Converting myAssembly.dll to a .net version 3.5 doesn help. Nor does copying the assembly to a different directory and referencing it from there. Any ideas?

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• Can you specify if aspnet_compiler.exe creates a debug or release build?

  - by user169867

  I wish to compile my asp.net MVC application using aspnet_compiler.exe from the comandline to speed up cold startup. I'm wondering how it determines if it should do a release or debug build. Is it always release? Does it depend on what the web.config file says when you run aspnet_compiler.exe? What happens to an application that's been compiled w/ aspnet_compiler.exe if someone changed the bug attribute in the web.config file after it has been published? Any clarification on this would be greatly appreciated.

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• Problems with overlapping ChildWindows in Silverlight

  - by Humanier

  Hello, I have a Silverlight application. At some point the app shows a ChildWindow with two datagrids and three buttons on it. One of the buttons is 'Reset To Defaults'. After it's pressed, the app shows another ChildWindow on top of the current one in order to ask confirmation. After the second ChildWindow is closed the first one starts to act funny. It's still changing highlighting of the elements on mouse events (mouseover on a grid element, click on a button). But clicking on the buttons doesn't fire my custom event handlers anymore. The only thing which is working on the ChildWindow is a small cross button created by the framework itself in the upper-right corner of the ChildWindow. I'd be grateful for any ideas on the cause of the problem or how to resolve it. Thanks.

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• initializer_list in the VC10

  - by user335870

  hi i wrote this program in VC++ 2010: class class1 { public: class1 (initializer_list<int> a){}; int foo; float Bar; }; void main() { class1 c = {2,3}; getchar(); } but i get this errors when i compile project: Error 1 error C2552: 'c' : non-aggregates cannot be initialized with initializer list c:\users\pswin\documents\visual studio 2010\projects\test_c++0x\test_c++0x\main.cpp 27 and 2 IntelliSense: initialization with '{...}' is not allowed for object of type "class1" c:\users\pswin\documents\visual studio 2010\projects\test_c++0x\test_c++0x\main.cpp 27 what is the problem?

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• How do you validate a URL with a regular expression in Python?

  - by Zachary Spencer

  I'm building a Google App Engine app, and I have a class to represent an RSS Feed. I have a method called setUrl which is part of the feed class. It accepts a url as an input. I'm trying to use the re python module to validate off of the RFC 3986 Reg-ex (http://www.ietf.org/rfc/rfc3986.txt) Below is a snipped which should work, right? I'm incredibly new to Python and have been beating my head against this for the past 3 days. p = re.compile('^(([^:/?#]+):)?(//([^/?#]*))?([^?#]*)(\?([^#]*))?(#(.*))?') m = p.match(url) if m: self.url = url return url

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