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  • How to call a service operation at a REST style WCF endpoint uri?

    - by Dieter Domanski
    Hi, is it possible to call a service operation at a wcf endpoint uri with a self hosted service? I want to call some default service operation when the client enters the endpoint uri of the service. In the following sample these uris correctly call the declared operations (SayHello, SayHi): - http://localhost:4711/clerk/hello - http://localhost:4711/clerk/hi But the uri - http://localhost:4711/clerk does not call the declared SayWelcome operation. Instead it leads to the well known 'Metadata publishing disabled' page. Enabling mex does not help, in this case the mex page is shown at the endpoint uri. private void StartSampleServiceHost() { ServiceHost serviceHost = new ServiceHost(typeof(Clerk), new Uri( "http://localhost:4711/clerk/")); ServiceEndpoint endpoint = serviceHost.AddServiceEndpoint(typeof(IClerk), new WebHttpBinding(), ""); endpoint.Behaviors.Add(new WebHttpBehavior()); serviceHost.Open(); } [ServiceContract] public interface IClerk { [OperationContract, WebGet(UriTemplate = "")] Stream SayWelcome(); [OperationContract, WebGet(UriTemplate = "/hello/")] Stream SayHello(); [OperationContract, WebGet(UriTemplate = "/hi/")] Stream SayHi(); } public class Clerk : IClerk { public Stream SayWelcome() { return Say("welcome"); } public Stream SayHello() { return Say("hello"); } public Stream SayHi() { return Say("hi"); } private Stream Say(string what) { string page = @"<html><body>" + what + "</body></html>"; return new MemoryStream(Encoding.UTF8.GetBytes(page)); } } Is there any way to disable the mex handling and to enable a declared operation instead? Thanks in advance, Dieter

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  • Access cost of dynamically created objects with dynamically allocated members

    - by user343547
    I'm building an application which will have dynamic allocated objects of type A each with a dynamically allocated member (v) similar to the below class class A { int a; int b; int* v; }; where: The memory for v will be allocated in the constructor. v will be allocated once when an object of type A is created and will never need to be resized. The size of v will vary across all instances of A. The application will potentially have a huge number of such objects and mostly need to stream a large number of these objects through the CPU but only need to perform very simple computations on the members variables. Could having v dynamically allocated could mean that an instance of A and its member v are not located together in memory? What tools and techniques can be used to test if this fragmentation is a performance bottleneck? If such fragmentation is a performance issue, are there any techniques that could allow A and v to allocated in a continuous region of memory? Or are there any techniques to aid memory access such as pre-fetching scheme? for example get an object of type A operate on the other member variables whilst pre-fetching v. If the size of v or an acceptable maximum size could be known at compile time would replacing v with a fixed sized array like int v[max_length] lead to better performance? The target platforms are standard desktop machines with x86/AMD64 processors, Windows or Linux OSes and compiled using either GCC or MSVC compilers.

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  • Cursor on Path doesn't appear in SilverLight

    - by Rahul Soni
    I am trying to draw a circle with a glass effect using Alpha. I am successful in creating that by using the below XAML. The cursor changes to Hand for the Ellipses, but it doesn't affect Path. Basically, I want to show "hand" cursor wherever the mouse appears over the circle. I hope this is not a known issue and I am missing something small. Any help is really appreciated. <Ellipse Cursor="Hand" Width="200" Height="200" Fill="#C42222" Canvas.Left="0" Canvas.Top="0" /> <Ellipse Cursor="Hand" Width="200" Height="200" Canvas.Left="0" Canvas.Top="0"> <Ellipse.Fill> <RadialGradientBrush GradientOrigin="0.3,0.7"> <GradientStop Offset="0" Color="#00000000" /> <GradientStop Offset="1" Color="#66000000" /> </RadialGradientBrush> </Ellipse.Fill> </Ellipse> <Path Cursor="Hand" Stretch="Fill" Height="114.598" Width="198.696" Data="M98.388435,-1.3301961 C98.388435,-1.3301961 117.1151,-3.094949 141.69321,8.1370029 C156.42262,14.868201 167.67375,23.694145 175.66234,33.657074 C183.67349,43.648144 181.90166,37.8708 191.90166,58.8708 C201.90166,79.870796 199.16658,89.212738 199.13568,92.90377 C198.77556,135.92146 175.45959,97.59124 156.75465,81.024025 C140.98892,67.060104 117.41241,64.357407 114.41241,64.357407 C111.4124,64.357407 83.061241,60.114159 63.061195,71.114143 C43.061146,82.114136 39.637829,86.429352 22.999804,100.99996 C6.5005584,115.44904 2.9997537,112.99996 2.9997537,112.99996 C2.9997537,112.99996 -1.1832786,97.194221 1.9997513,81.999893 C7.2054667,57.150185 13.999762,47.999939 17.999771,42.999943 C21.999781,37.99995 29.935833,23.400871 54.053131,10.21261 C78.91642,-3.3835876 98.388435,-1.3301961 98.388435,-1.3301961 z"> <Path.Fill> <LinearGradientBrush EndPoint="0,1" StartPoint="0,0"> <GradientStop Color="#55FFFFFF" Offset="0"/> <GradientStop Color="#11FFFFFF" Offset="0.5"/> <GradientStop Color="#00FFFFFF" Offset="1"/> </LinearGradientBrush> </Path.Fill> </Path>

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  • WPF PasswordBox Input Panel Icon Not Appearing: Better Workaround?

    - by Anna Savarin
    Hello, There is a known issue in WPF where the Input Panel icon does not appear when you set focus on a PasswordBox control. I'm in need of a workaround for this, but the one suggested -- using the ITextInputPanel API -- does not quite cut it for me. Fist of all, the API works with Windows Forms controls and alternatively accepts control handles. Since WPF controls are not handle based, and they are not Forms controls, this is not quite suitable. I tried hosting a Forms control on my WPF page and that worked on the Windows XP Tabled PC (albeit with some COM exceptions) but, since there is no PasswordBox in Forms, I had to stick with a regular textbox, which is not what I need. Alternatively, using the VisualTreeHelper to get a handle on the control did not work, either. The API, according to http://msdn.microsoft.com/en-us/library/ms699559%28VS.85%29.aspx, is only compatible with Vista. I'm dealing with Windows XP tablets. I understand that the IPenInput API can be used as an alternative, but it is now deprecated. Can someone please suggest something? I really need to fix this issue. Thanks in advance!

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  • Inner angle between two lines

    - by ocell
    Hi folks, I have two lines: Line1 and Line2. Each line is defined by two points (P1L1(x1, y1), P2L1(x2, y2) and P1L1(x1, y1), P2L3(x2, y3)). I want to know the inner angle defined by these two lines. For do it I calculate the angle of each line with the abscissa: double theta1 = atan(m1) * (180.0 / PI); double theta2 = atan(m2) * (180.0 / PI); After to know the angle I calculate the following: double angle = abs(theta2 - theta1); The problem or doubt that I have is: sometimes I get the correct angle but sometimes I get the complementary angle (for me outer). How can I know when subtract 180º to know the inner angle? There is any algorithm better to do that? Because I tried some methods: dot product, following formula: result = (m1 - m2) / (1.0 + (m1 * m2)); But always I have the same problem; I never known when I have the outer angle or the inner angle! Thanks in advance for reading my trouble and for your time! Oscar.

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  • Unit testing opaque structure based C API

    - by Nicolas Goy
    I have a library I wrote with API based on opaque structures. Using opaque structures has a lot of benefits and I am very happy with it. Now that my API are stable in term of specifications, I'd like to write a complete battery of unit test to ensure a solid base before releasing it. My concern is simple, how do you unit test API based on opaque structures where the main goal is to hide the internal logic? For example, let's take a very simple object, an array with a very simple test: WSArray a = WSArrayCreate(); int foo = 5; WSArrayAppendValue(a, &foo); int *bar = WSArrayGetValueAtIndex(a, 0); if(&foo != bar) printf("Eroneous value returned\n"); else printf("Good value returned\n"); WSRelease(a); Of course, this tests some facts, like the array actually acts as wanted with 1 value, but when I write unit tests, at least in C, I usualy compare the memory footprint of my datastructures with a known state. In my example, I don't know if some internal state of the array is broken. How would you handle that? I'd really like to avoid adding codes in the implementation files only for unit testings, I really emphasis loose coupling of modules, and injecting unit tests into the implementation would seem rather invasive to me. My first thought was to include the implementation file into my unit test, linking my unit test statically to my library. For example: #include <WS/WS.h> #include <WS/Collection/Array.c> static void TestArray(void) { WSArray a = WSArrayCreate(); /* Structure members are available because we included Array.c */ printf("%d\n", a->count); } Is that a good idea? Of course, the unit tests won't benefit from encapsulation, but they are here to ensure it's actually working.

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  • How to get rid of Internet Explorer 7 reloading on fragment change

    - by Philippe Beaudoin
    I have an anchor <a href="#!admin">General</a> somewhere in my page. Clicking this in any browser but IE7 (haven't tried IE6) causes no page reload, as expected. However, under IE7 it reloads the page as soon as it's clicked. The strangest thing is that I have the exact same anchor elsewhere in the page and it causes no reload. The only difference I can see between these is a slight difference in style, and the fact that the faulty anchor is deeply nested in divs, where the other is closer to the top. My questions: Is this a known bug with IE7? If so, is there any work around? If not, any clue as to what might be going wrong? Edit: If you want to see this yourself, go to http://filouguestbook.appspot.com/#!main sign-in with a google account and click on the Settings link the the top bar. Switch between the General and Accounts pages, the app will reload. From the Accounts page, click on Settings in the top bar, this will switch tab but not reload!

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  • APC values randomly disappear

    - by Michael
    I'm using APC for storing a map of class names to class file paths. I build the map like this in my autoload function: $class_paths = apc_fetch('class_paths'); // If the class path is stored in application cache - search finished. if (isset($class_paths[$class])) { return require_once $class_paths[$class]; // Otherwise search in known places } else { // List of places to look for class $paths = array( '/src/', '/modules/', '/libs/', ); // Search directories and store path in cache if found. foreach ($paths as $path) { $file = DOC_ROOT . $path . $class . '.php'; if (file_exists($file)) { echo 'File was found in => ' . $file . '<br />'; $class_paths[$class] = $file; apc_store('class_paths', $class_paths); return require_once $file; } } } I can see as more and more classes are loaded, they are added to the map, but at some point the apc_fetch returns NULL in the middle of a page request, instead of returning the map. Getting => class_paths Array ( [MCS\CMS\Helper\LayoutHelper] => /Users/mbl/Documents/Projects/mcs_ibob/core/trunk/src/MCS/CMS/Helper/LayoutHelper.php [MCS\CMS\Model\Spot] => /Users/mbl/Documents/Projects/mcs_ibob/core/trunk/src/MCS/CMS/Model/Spot.php ) Getting => class_paths {null} Many times the cached value will also be gone between page requests. What could be the reason for this? I'm using APC as an extension (PECL) running PHP 5.3.

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  • Best way to randomly select rows *per* column in SQL Server

    - by LesterDove
    A search of SO yields many results describing how to select random rows of data from a database table. My requirement is a bit different, though, in that I'd like to select individual columns from across random rows in the most efficient/random/interesting way possible. To better illustrate: I have a large Customers table, and from that I'd like to generate a bunch of fictitious demo Customer records that aren't real people. I'm thinking of just querying randomly from the Customers table, and then randomly pairing FirstNames with LastNames, Address, City, State, etc. So if this is my real Customer data (simplified): FirstName LastName State ========================== Sally Simpson SD Will Warren WI Mike Malone MN Kelly Kline KS Then I'd generate several records that look like this: FirstName LastName State ========================== Sally Warren MN Kelly Malone SD Etc. My initial approach works, but it lacks the elegance that I'm hoping the final answer will provide. (I'm particularly unhappy with the repetitiveness of the subqueries, and the fact that this solution requires a known/fixed number of fields and therefore isn't reusable.) SELECT FirstName = (SELECT TOP 1 FirstName FROM Customer ORDER BY newid()), LastName= (SELECT TOP 1 LastNameFROM Customer ORDER BY newid()), State = (SELECT TOP 1 State FROM Customer ORDER BY newid()) Thanks!

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  • Struts2 Sitemesh not working in WAS 6 server

    - by Jithin
    I have a struts2-spring application which works fine in jetty server but when i try migrating it to WAS 6 the decorator(sitemesh) is not getting applied. The server logs shows no error.Is this a known issue ? my web.xml looks like this <filter> <filter-name>action2-cleanup</filter-name> <filter-class>org.apache.struts2.dispatcher.ActionContextCleanUp</filter-class> </filter> <filter> <filter-name>sitemesh</filter-name> <filter-class>com.opensymphony.module.sitemesh.filter.PageFilter</filter-class> </filter> <filter> <filter-name>action2</filter-name> <filter-class>org.apache.struts2.dispatcher.FilterDispatcher</filter-class> </filter> <filter-mapping> <filter-name>action2</filter-name> <url-pattern>/*</url-pattern> </filter-mapping> <filter-mapping> <filter-name>action2-cleanup</filter-name> <url-pattern>/*</url-pattern> </filter-mapping> <filter-mapping> <filter-name>sitemesh</filter-name> <url-pattern>/*</url-pattern> <dispatcher>FORWARD</dispatcher> <dispatcher>INCLUDE</dispatcher> <dispatcher>REQUEST</dispatcher> </filter-mapping>

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  • Are dots legal in the name property of an HTML button

    - by justSteve
    a page with a bit of MVC code: <%=Html.SubmitButton("ChooseWebinar.Submit", "Continue to Registration Details")%><br/> that generates an input button where the '.' is embedded in the name: [rendered html] At page load this control (the submit button) is hidden - when one of two different dropdowns registers a value, the button is shown: function toggleChooseWebinarSubmit() { if ($("#ChooseWebinar_RecordedWebinarId").val() || $("#ChooseWebinar_UpcomingWebinarId").val()) { $("#ChooseWebinar_Submit").show(); } else { $("#ChooseWebinar_Submit").hide(); } I've just received a report from an IE8 user who says that after selecting a value in a dropdown, the button is _not displaying. I can't reproduce the condition (i've tried compatibility mode too). Obviously the show/hide is targeting the 'ID' selector but i can't help but wonder about that period in the control's name. Any known issues? - or perhaps the .change is problematic and the toggle's never getting called: $(window).load(function() { toggleChooseWebinarSubmit(); $("#ChooseWebinar_UpcomingWebinarId").change(function() { if ($(this).val()) { $("#ChooseWebinar_RecordedWebinarId").val(""); } toggleChooseWebinarSubmit(); }); $("#ChooseWebinar_RecordedWebinarId").change(function() { if ($(this).val()) { $("#ChooseWebinar_UpcomingWebinarId").val(""); } toggleChooseWebinarSubmit(); }); }); thx

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  • Theory: "Lexical Encoding"

    - by _ande_turner_
    I am using the term "Lexical Encoding" for my lack of a better one. A Word is arguably the fundamental unit of communication as opposed to a Letter. Unicode tries to assign a numeric value to each Letter of all known Alphabets. What is a Letter to one language, is a Glyph to another. Unicode 5.1 assigns more than 100,000 values to these Glyphs currently. Out of the approximately 180,000 Words being used in Modern English, it is said that with a vocabulary of about 2,000 Words, you should be able to converse in general terms. A "Lexical Encoding" would encode each Word not each Letter, and encapsulate them within a Sentence. // An simplified example of a "Lexical Encoding" String sentence = "How are you today?"; int[] sentence = { 93, 22, 14, 330, QUERY }; In this example each Token in the String was encoded as an Integer. The Encoding Scheme here simply assigned an int value based on generalised statistical ranking of word usage, and assigned a constant to the question mark. Ultimately, a Word has both a Spelling & Meaning though. Any "Lexical Encoding" would preserve the meaning and intent of the Sentence as a whole, and not be language specific. An English sentence would be encoded into "...language-neutral atomic elements of meaning ..." which could then be reconstituted into any language with a structured Syntactic Form and Grammatical Structure. What are other examples of "Lexical Encoding" techniques? If you were interested in where the word-usage statistics come from : http://www.wordcount.org

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  • .Net Remoting: Serialize Object and implementation

    - by flogo
    Hi, In my scenario there is a client-side assembly that contains a class (Task). This class implements an interface (ITask) that is known on the server. I'm trying to send a Task object from client to server without copying the assembly of the client manually to the server. If I just serialize the task object, the server obviously complains about the missing assembly. I then tried to serialze typeof(Task).Assembly but could not derserialize it on the server. Next I tried to File.ReadAllBytes(typeof(Task).Assembly.Location) and saved it to a temporary file on the server, which threw an exception on Assembly.LoadFrom(@".\temporary.dll"); Why am I doing this? Java RMI has a neat feature to request the implementation of an object that is received through remoting but is stil "unkown" (this JVM doesn't have the *.class file). This can be used for a compute server that just knows the interface of a "task" containing a run() method and downloads the implementation of this method on demand. This way the server doesn't have to be changed for new tasks. I'm trying to achieve something like this in .Net.

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  • Weird bug with C++ lambda expressions in VS2010

    - by Andrei Tita
    In a couple of my projects, the following code: class SmallClass { public: int x1, y1; void TestFunc() { auto BadLambda = [&]() { int g = x1 + 1; //ok int h = y1 + 1; //c2296 int l = static_cast<int>(y1); //c2440 }; int y1_copy = y1; //it works if you create a local copy auto GoodLambda = [&]() { int h = y1_copy + 1; //ok int l = this->y1 + 1; //ok }; } }; generates error C2296: '+' : illegal, left operand has type 'double (__cdecl *)(double)' or alternatively error C2440: 'static_cast' : cannot convert from 'double (__cdecl *)(double)' to 'int' You get the picture. It also happens if catching by value. The error seems to be tied to the member name "y1". It happened in different classes, different projects and with (seemingly) any type for y1; for example, this code: [...] MyClass y1; void TestFunc() { auto BadLambda = [&]()->void { int l = static_cast<int>(y1); //c2440 }; } generates both these errors: error C2440: 'static_cast' : cannot convert from 'MyClass' to 'int' No user-defined-conversion operator available that can perform this conversion, or the operator cannot be called error C2440: 'static_cast' : cannot convert from 'double (__cdecl *)(double)' to 'int' There is no context in which this conversion is possible It didn't, however, happen in a completely new project. I thought maybe it was related to Lua (the projects where I managed to reproduce this bug both used Lua), but I did not manage to reproduce it in a new project linking Lua. It doesn't seem to be a known bug, and I'm at a loss. Any ideas as to why this happens? (I don't need a workaround; there are a few in the code already). Using Visual Studio 2010 Express version 10.0.40219.1 Sp1Rel.

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  • jQuery slideDown: Parent element doesn't expand?

    - by bobsoap
    Hi, This issue occurs in our beloved Internet Explorer 7: I have a list of items, each with a hidden child div. When user clicks the "expand" button in any list item, the hidden div will expand downwards and push all content beneith it lower. This works just as it should in FF, Chrome, IE8 - but IE7 will not expand the parent element along with its children. This is noticeable because the top-most parent container has an absolutely positioned image at the very bottom (yea... rounded corners) - that doesn't get pushed down when the content expands. I'm guessing that's because of the absolute positioning... Just wondering whether I should attempt to code up some huge workaround in jQuery just for that (assuming I'm able to), or if this is a known issue of some sort. My HTML: <div id="container"> <ul> <li>Click here to expand <div class="hide"></div> </li> <li>Click here to expand <div class="hide"></div> </li> <li>Click here to expand <div class="hide"></div> </li> </ul> <div id="containerbottom"></div> </div> The CSS: #container { position:relative; } #container #containerbottom { position:absolute; bottom:0px; left:0px; } The jQuery is pretty much your everyday slide function: $('ul li').click(function() { $(this).children('.hide').slideDown(200); }); Any ideas?

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  • Python: slow read & write for millions of small files

    - by Jami
    I am building directory tree which has tons of subdirectories and files. The total directory count is somewhere along 256^32 subdirectories with 256 files in each end which are only a few bytes long. I did this so I would have fast access to these files (since i'm not searching and i'm just directly accessing then via a known file path) I have a python script that builds this filesystem and reads & writes those files. The problem is that when I reach more than 1Gb of total filesize, the read and write methods become extremely slow. Here's the function I have that reads the contents of a file (the file contains an integer string), adds a certain number to it, then writes it back to the original file. def addInFile(path, scoreToAdd): num = scoreToAdd try: shutil.copyfile(path, '/tmp/tmp.txt') fp = open('/tmp/tmp.txt', 'r') num += int(fp.readlines()[0]) fp.close() except: pass fp = open('/tmp/tmp.txt', 'w') fp.write(str(num)) fp.close() shutil.copyfile('/tmp/tmp.txt', path) I previously tried performing linux console commands but it was slower. I copy the file to a temporary file first then access/modify it then copy it back because i found this was faster than directly accessing the file. I think the cause of the slowdown is because there're tons of files. performing this function 1000 times sometimes reach 1 minute now, but before (when there were only a few files, 1000 calls was performed for only less than 1 second) How do you suggest I fix this?

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  • Can iPad/iPhone Touch Points be Wrong Due to Calibration?

    - by Kristopher Johnson
    I have an iPad application that uses the whole screen (that is, UIStatusBarHidden is set true in the Info.plist file). The main window's frame is set to (0, 0, 768, 1024), as is the main view in that frame. The main view has multitouch enabled. The view has code to handle touches: - (void)touchesMoved:(NSSet *)touches withEvent:(UIEvent *)event { for (UITouch *touch in touches) { CGPoint location = [touch locationInView:nil]; NSLog(@"touchesMoved at location %@", NSStringFromCGPoint(location)); } } When I run the app in the simulator, it works pretty much as expected. As I move the mouse from one edge of the screen to the other, reported X values go from 0 to 767. Reported Y values go from 20 to 1023, but it is a known issue that the simulator doesn't report touches in the top 20 pixels of the screen, even when there is no status bar. Here's what's weird: When I run the app on an actual iPad, the X values go from 0 to 767 as expected, but reported Y values go from -6 to 1017. The fact that it seems to work properly on the simulator leads me to suspect that real devices' touchscreens are not perfectly calibrated, and mine is simply reporting values six pixels too low. Can anyone verify that this is the case? Otherwise, is there anything else that could account for the Y values being six pixels off from what I expect? (In a few days, I should have a second iPad, so I can test this with another device and compare the results.)

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  • non-copyable objects and value initialization: g++ vs msvc

    - by R Samuel Klatchko
    I'm seeing some different behavior between g++ and msvc around value initializing non-copyable objects. Consider a class that is non-copyable: class noncopyable_base { public: noncopyable_base() {} private: noncopyable_base(const noncopyable_base &); noncopyable_base &operator=(const noncopyable_base &); }; class noncopyable : private noncopyable_base { public: noncopyable() : x_(0) {} noncopyable(int x) : x_(x) {} private: int x_; }; and a template that uses value initialization so that the value will get a known value even when the type is POD: template <class T> void doit() { T t = T(); ... } and trying to use those together: doit<noncopyable>(); This works fine on msvc as of VC++ 9.0 but fails on every version of g++ I tested this with (including version 4.5.0) because the copy constructor is private. Two questions: Which behavior is standards compliant? Any suggestion of how to work around this in gcc (and to be clear, changing that to T t; is not an acceptable solution as this breaks POD types). P.S. I see the same problem with boost::noncopyable.

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  • Best way to randomly select columns from random rows of SQL results.

    - by LesterDove
    A search of SO yields many results describing how to select random rows of data from a database table. My requirement is a bit different, though, in that I'd like to select individual columns from across random rows in the most efficient/random/interesting way possible. To better illustrate: I have a large Customers table, and from that I'd like to generate a bunch of fictitious demo Customer records that aren't real people. I'm thinking of just querying randomly from the Customers table, and then randomly pairing FirstNames with LastNames, Address, City, State, etc. So if this is my real Customer data (simplified): FirstName LastName State ========================== Sally Simpson SD Will Warren WI Mike Malone MN Kelly Kline KS Then I'd generate several records that look like this: FirstName LastName State ========================== Sally Warren MN Kelly Malone SD Etc. My initial approach works, but it lacks the elegance that I'm hoping the final answer will provide. (I'm particularly unhappy with the repetitiveness of the subqueries, and the fact that this solution requires a known/fixed number of fields and therefore isn't reusable.) SELECT FirstName = (SELECT TOP 1 FirstName FROM Customer ORDER BY newid()), LastName= (SELECT TOP 1 LastNameFROM Customer ORDER BY newid()), State = (SELECT TOP 1 State FROM Customer ORDER BY newid()) Thanks!

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  • Destroy process-less console windows left by Visual Studio debug sessions

    - by jon hanson
    A known bug with security update KB978037 can occur with Visual Studio 2003 (and 2008) where sometimes if you restart a debugging session on a console app then the console window doesn't get closed even though the owner process no longer exists. The problem is discussed further here: http://stackoverflow.com/questions/2402875/visual-studio-debug-console-sometimes-stays-open-and-is-impossible-to-close These zombie windows then can not be closed via the Taskbar or via the TaskManager, and typically require a power off/on to get rid of them. Over the period of even a single day you can accumulate quite a few of them, which clog up your TaskBar and are generally annoying. I thought I would knock up a simple C++ Win32 utility to attempt to call DestroyWindow() on these windows by passing the windows handle as a cmd-line argument and converting it to a HWND. I'm converting the handle from a string by parsing it as a DWORD then casting the DWORD to a HWND. This appears to be working as if I call GetWindowInfo() on the handle it succeeds. However calling DestroyWindow() on the handle fails with error 5 (access denied), presumably because the caller process (i.e. my app) doesn't own the window in question. Any ideas as to how I might get rid of the zombie windows, either via the above approach or any other alternative short of rebooting? I'm in a corporate environment so installing/uninstalling updates/service-packs etc isn't an option.

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  • int.Parse of "8" fails. int.Parse always requires CultureInfo.InvariantCulture?

    - by Henrik Carlsson
    We develop an established software which works fine on all known computers except one. The problem is to parse strings that begin with "8". It seems like "8" in the beginning of a string is a reserved character. Parsing: int.Parse("8") -> Exception message: Input string was not in a correct format. int.Parse("80") -> 0 int.Parse("88") -> 8 int.Parse("8100") -> 100 CurrentCulture: sv-SE CurrentUICulture: en-US The problem is solved using int.Parse("8", CultureInfo.InvariantCulture). However, it would be nice to know the source of the problem. Question: Why do we get this behaviour of "8" if we don't specify invariant culture? Additional information: I did send a small program to my client achieve the result above: private int ParseInt(string s) { int parsedInt = -1000; try { parsedInt = int.Parse(s); textBoxMessage.Text = "Success: " + parsedInt; } catch (Exception ex) { textBoxMessage.Text = string.Format("Error parsing string: '{0}'", s) + Environment.NewLine + "Exception message: " + ex.Message; } textBoxMessage.Text += Environment.NewLine + Environment.NewLine + "CurrentCulture: " + Thread.CurrentThread.CurrentCulture.Name + "\r\n" + "CurrentUICulture: " + Thread.CurrentThread.CurrentUICulture.Name + "\r\n"; return parsedInt; }

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  • Overloading operator>> to a char buffer in C++ - can I tell the stream length?

    - by exscape
    I'm on a custom C++ crash course. I've known the basics for many years, but I'm currently trying to refresh my memory and learn more. To that end, as my second task (after writing a stack class based on linked lists), I'm writing my own string class. It's gone pretty smoothly until now; I want to overload operator that I can do stuff like cin my_string;. The problem is that I don't know how to read the istream properly (or perhaps the problem is that I don't know streams...). I tried a while (!stream.eof()) loop that .read()s 128 bytes at a time, but as one might expect, it stops only on EOF. I want it to read to a newline, like you get with cin to a std::string. My string class has an alloc(size_t new_size) function that (re)allocates memory, and an append(const char *) function that does that part, but I obviously need to know the amount of memory to allocate before I can write to the buffer. Any advice on how to implement this? I tried getting the istream length with seekg() and tellg(), to no avail (it returns -1), and as I said looping until EOF (doesn't stop reading at a newline) reading one chunk at a time.

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  • Synchronizing screencasting (ffmpeg) and capturing from the webcam (OpenCV)

    - by lyuba
    As from my previous questions, I am trying to build a simple eye tracker. Decided to start from a Linux version (run Ubuntu). To complete this task one should organize screencasting and webcam capturing in such way that frames from both streams exactly match each other and there is the same number of frames in each of them totally. Screencasting fsp fully depends on the camera's fsp, so each time we get the image from the webcam we can potentially grab a screen frame and stay happy. However, all the tools for the fast screencasting, like ffmpeg, for example, return the .avi file as the result and require the fsp already known to be started. From the other side, tools like Java+Robot or ImageMagick seem to require around 20ms to return the .jpg screenshot, which is pretty slow for the task. But they may be requested right after each time the webcam frame is grabbed and provide the needed synchronization. So the sub-questions are: 1. Does the USD camera's frame rate vary during a single session? 2. Are there any tools which provide fast screencasting frame by frame? 3. Is there any way to make ffmpeg push a new frame to the .avi file only when program initiates this request? For my task I may either use C++ or Java. I am, actually, an interface designer, not the driver programmer, and this task seems to be pretty low-level. I would be grateful for any suggestion and tip!

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  • Is it possible to receive SMS message on appWidget?

    - by cappuccino
    Is it possible to receive SMS message on appWidget? I saw android sample source(API Demos). In API Demos, ExampleAppWidgetProvider class extends AppWidgetProvider, not Activity. So, I guess it is impossible to regist SMS Receiver like this, rcvIncoming = new BroadcastReceiver() { @Override public void onReceive(Context context, Intent intent) { Log.i("telephony", "SMS received"); Bundle data = intent.getExtras(); if (data != null) { // SMS uses a data format known as a PDU Object pdus[] = (Object[]) data.get("pdus"); String message = "New message:\n"; String sender = null; for (Object pdu : pdus) { SmsMessage part = SmsMessage.createFromPdu((byte[])pdu); message += part.getDisplayMessageBody(); if (sender == null) { sender = part.getDisplayOriginatingAddress(); } } Log.i(sender, message); } } }; registerReceiver(rcvIncoming, new IntentFilter("android.provider.Telephony.SMS_RECEIVED")); My goal is to receive SMS message on my custom appWidget. Any help would be appreciated!!

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  • Multi-dimensional array edge/border conditions

    - by kirbuchi
    Hi, I'm iterating over a 3 dimensional array (which is an image with 3 values for each pixel) to apply a 3x3 filter to each pixel as follows: //For each value on the image for (i=0;i<3*width*height;i++){ //For each filter value for (j=0;j<9;j++){ if (notOutsideEdgesCondition){ *(**(outArray)+i)+= *(**(pixelArray)+i-1+(j%3)) * (*(filter+j)); } } } I'm using pointer arithmetic because if I used array notation I'd have 4 loops and I'm trying to have the least possible number of loops. My problem is my notOutsideEdgesCondition is getting quite out of hands because I have to consider 8 border cases. I have the following handled conditions Left Column: ((i%width)==0) && (j%3==0) Right Column: ((i-1)%width ==0) && (i>1) && (j%3==2) Upper Row: (i<width) && (j<2) Lower Row: (i>(width*height-width)) && (j>5) and still have to consider the 4 corner cases which will have longer expressions. At this point I've stopped and asked myself if this is the best way to go because If I have a 5 line long conditional evaluation it'll not only be truly painful to debug but will slow the inner loop. That's why I come to you to ask if there's a known algorithm to handle this cases or if there's a better approach for my problem. Thanks a lot.

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