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• .NET Form_load priority

  - by mtranda

  So, the problem is such as this: I have a method that does stuff and updates a progress bar. If I call the method after the form is fully loaded (i.e.: by assigning it to a button on the form) everything works fine. The problem is that I need the method to start working as soon as the form loads, by itself, so I would place it in the Form_Load method. The problem is that even though I call Application.DoEvents() right before calling that method from within Form_Load, the form doesn't show up until the method has completed everything. As I said, if I let the form load first and call the method from another UI element for instance, everything works fine. Thanks in advance.

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• Trouble making OAuth signed requests

  - by behrk2

  Hello, I am able to successfully make non-authenticated and protected calls to the Netflix API. I am having a little trouble making signed requests to the catalog, however. Using the OAuth Test page, it is clear to me that my Base String is correct. My request URL is also correct, except for the oauth_signature. The oauth_signature is the only thing that differs. If I understand correctly, the only difference between a protected call and a signed call is that there are no tokens involved, and that I am appending on call parameters (such as term). So, I am using the exact same code that I use for my protected calls that I am for my signed calls, except my signature key ONLY contains my shared secret (with an ampersand sign on the end of it). It does not use the access token. Am I missing something here? Where else can I be going wrong? Thanks!

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• 60 Years of Barcodes [Infographic]

  - by Asian Angel

  Barcodes adorn nearly everything we buy such as food, books, movies, and more, so just how did it all begin and how has the technology evolved over the past sixty years? 60th anniversary of the barcode [via Graph Jam - Cheeseburger Network] 6 Ways Windows 8 Is More Secure Than Windows 7 HTG Explains: Why It’s Good That Your Computer’s RAM Is Full 10 Awesome Improvements For Desktop Users in Windows 8

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• Stack calling convention between .NET & C on WinCE 6.0

  - by bernard

  Hi there. I'm porting a DLL written in C from WinCE 5.0 to WinCE 6.0 on an ARM target. This DLL is called by a .NET software. On WinCE5.0, everything runs fine. On WinCE6, I have the following problem: on InitInstance() of my DLL, I can call anything without problem (for example MessageBox()) or uses recursivity. Passed that point, the DLL is called by .NET code. And then it fails: even the arguments passed by .NET code seem weird. I can call MessageBox() once, but I can't call a function that calls MessageBox() and then that calls itself: recursivity is broken. It seems that the .NET code uses the stack in a different way than my C code. I'm very unfamillar with the Windows world and the company that gives me the .NET application does not understand yet why there is such a failure. Any pointer/hint/advice welcome! Thanks!

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• XSLT adding elements on the same path

  - by Stefan

  Consider the following XML: <?xml version="1.0" encoding="ISO-8859-1"?> <catalog> <cd> <title>Empire Burlesque</title> <artist> <name>Bob</name> <surname>Dylan</surname> </artist> <country>USA</country> <company>Columbia</company> <price>10.90</price> <year>1985</year> </cd> </catalog> I want to add elements to this XML using XSLT, to get the following result: <?xml version="1.0" encoding="ISO-8859-1"?> <catalog> <cd> <title>Empire Burlesque</title> <artist> <name>Bob</name> <surname>Dylan</surname> <!-- NEW --> <middlename>???</middlename> </artist> <country>USA</country> <company>Columbia</company> <price>10.90</price> <year>1985</year> <!-- NEW --> <comment>great one</comment> </cd> <!-- NEW --> <cd> <title>Hide your heart</title> <artist> <name>Bonnie</name> <surname>Tyler</surname> </artist> <country>UK</country> <company>CBS Records</company> <price>9.90</price> <year>1988</year> </cd> </catalog> To achieve that, I wrote the following XSLT: <?xml version="1.0" encoding="ISO-8859-1"?> <xsl:stylesheet version="1.0" xmlns:xsl="http://www.w3.org/1999/XSL/Transform"> <xsl:template name="injectXml"> <xsl:param name="whatToInject"/> <xsl:copy> <xsl:copy-of select="node() | @*"/> <xsl:copy-of select="$whatToInject"/> </xsl:copy> </xsl:template> <xsl:template match="//catalog"> <xsl:call-template name="injectXml"> <xsl:with-param name="whatToInject"> <cd> <title>Hide your heart</title> <artist> <name>Bonnie</name> <surname>Tyler</surname> </artist> <country>UK</country> <company>CBS Records</company> <price>9.90</price> <year>1988</year> </cd> </xsl:with-param> </xsl:call-template> </xsl:template> <xsl:template match="//cd[year=1985]"> <xsl:call-template name="injectXml"> <xsl:with-param name="whatToInject"> <comment>great one</comment> </xsl:with-param> </xsl:call-template> </xsl:template> <xsl:template match="//cd[year=1985]/artist"> <xsl:call-template name="injectXml"> <xsl:with-param name="whatToInject"> <middlename>???</middlename> </xsl:with-param> </xsl:call-template> </xsl:template> </xsl:stylesheet> Why it's not working? How to do it?

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• putenv/setenv using substitutions

  - by vinaym

  I need user to define all the environment variables needed for my program in a text file as shown below. MyDLLPath = C:\MyDLLPath MyOption = Option1 PATH = %MyDLLPath%;%PATH%; In my program I read each line and call putenv with the string. Problem is that the environment substitutions (%MyDLLPath%) are not being expanded. I am guessing the following fix for that 1. Check each line for % characters. 2. Get the text between 2 consecutive % characters. 3. Call getenv using the text from step 2. 4. Replace value obtained above into the line and then call putenv. Is there a better way to do it?

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• putenv/setenv using substitutions

  - by vinaym

  I need user to define all the environment variables needed for my program in a text file as shown below. MyDLLPath = C:\MyDLLPath MyOption = Option1 PATH = %MyDLLPath%;%PATH%; In my program I read each line and call putenv with the string. Problem is that the environment substitutions (%MyDLLPath%) are not being expanded. I am guessing the following fix for that - Check each line for % characters.- Get the text between 2 consecutive % characters.- Call getenv using the text- Replace value obtained above into the line and then call putenv. Is there a better way to do it?

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• Static lib that links another static lib and qmake? Odd linking error

  - by Dan O

  I have two qt .pro files, both using the lib TEMPLATE and staticlib CONFIG. The first library (lets call it 'core') is a dependency for the second lib (I'll call it 'foo'). In fact, there's a class in foo that extends a class in core, I will call this class Bar. When I instantiate the class (which is defined and implemented in foo, but extends a class (Bar) from core) in another project (not a lib) I get the following linking error: /usr/bin/ld: Undefined symbols: Bar::Bar() Basically, the linker cannot find the class in the core lib that has been derived in the foo lib, but ONLY when I instantiate the class in a third project that is using both libs. Is this behaviour expected? Regards, Dan O Update: I fixed it by directly invoking the Bars constructor in the third project before using derived class... does anyone know why I need to do this?

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• Is calling Process.Refresh() required for Process.HasFinished

  - by Rekreativc

  Hello I am interested if calling Process.Refresh() is mandatory when waiting for the process to terminate by checking Process.HasFinished property? I have a piece of code that works fine without the Process.Refresh() call, however I am curious weather this is a coincidence? I can see that a msdn example has the Process.Refresh() call... If its not necessary, and Process.HasExited is the only property I need, are there any advantages to making the call to Process.Refresh() ? If not, is there a reason it is in the msdn example? Thank you for your answers.

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• WCF Blocking problem with mutiple clients!!

  - by Marcel

  Hi I seem to have a blocking issue with WCF. Say I have two users and each have created their own instance of a class exposed on a WCF host using net.tcp with endpoint something like this "net.tcp://localhost:32000/SymHost/". The class is PerSession context and concurrency is reentrant. The class exposes two methods Alive() which return a bool of true straight away and an AliveWait which I inserted which does a Thread.Sleep for 4 seconds before returning true (testing purposes). Now client 1 calls AliveWait() during which time he is blocked which is fair enough but then if client 2 makes a call to Alive() on its own instance he has to wait until client 1's call is returned - this behaviour is not what I would have expected? I would have expected client 2 to carry on as if nothing has happened or is this to do with the fact that they both share the same endpoint? Can anyone explain what is going on and how I can make sure that client 2 can call its own instance uninterrupted? Any help much appreciated!

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• Getting info from NSData object

  - by Moshe

  How would I get returningResponse (into say, a NSString) from the following code: NSURLResponse* response; NSError* error; NSData* result = [NSURLConnection sendSynchronousRequest:theRequest returningResponse:&response error:&error]; I think I can get the info that I need into a string but I can't call anything on response because it's null. Therefore, I assume that I need to call something on result. The problem is, I don't know what to call. (The URL request has been coded prior to the code sample. I know that that works.) I want to be able to detect if the request as successful.

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• I keep Getting KeyError: 'tried' Whenever I Tried to Run Django Dev Server from Remote Machine

  - by Spikie

  I am running django on python2.6.1, and did start the django web server like this manage.py runserver 192.0.0.1:8000 then tried to connect to the django dev web server on http://192.0.0.1:8000/ keep getting this message on the remote computer Traceback (most recent call last): File "C:\Python26\Lib\site-packages\django\core\servers\basehttp.py", line 279, in run self.result = application(self.environ, self.start_response) File "C:\Python26\Lib\site-packages\django\core\servers\basehttp.py", line 651, in call return self.application(environ, start_response) File "C:\Python26\lib\site-packages\django\core\handlers\wsgi.py", line 241, in call response = self.get_response(request) File "C:\Python26\lib\site-packages\django\core\handlers\base.py", line 115, in get_response return debug.technical_404_response(request, e) File "C:\Python26\Lib\site-packages\django\views\debug.py", line 247, in technical_404_response tried = exception.args[0]['tried'] KeyError: 'tried' what i am doing wrong ? it seen to work ok if i run http://192.0.0.1:8000/ on the computer that runs the Django web server and have that ip 192.0.0.1:8000

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• Are there macro facility for Java or C#?

  - by h2g2java

  Macros are useful. Therefore, I occasionally bemoan the absence of macros in Java and C#. Macros allow me to force in-line but allow me the code-manageability of non-macro code. Is there any Java- or C#-based project/product somewhere out there that effectively allow macros or specifying in-line expansion. I am thinking of something like @macro public void hello(int x){ ... } or when I call a method, an @inline annotation preceding the call would effect the called-method to be in-lined. or, should I need to know that I should just trust the compiler to make the best the decision for me that at the best of its analysis it might in-line a call. I hope this question will not lead to debating the pro/cons/usefulness of macros.

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• Is it possible to efficiently store all possible phone numbers in memory?

  - by Spencer K

  Given the standard North American phone number format: (Area Code) Exchange - Subscriber, the set of possible numbers is about 6 billion. However, efficiently breaking down the nodes into the sections listed above would yield less than 12000 distinct nodes that can be arranged in groupings to get all the possible numbers. This seems like a problem already solved. Would it done via a graph or tree?

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• How do ansynchronous methods work

  - by Polaris878

  Hello, I'm wondering if anyone can help me understand some asynchronous javascript concepts... Say I make an asynch ajax call like so: xmlhttp=new XMLHttpRequest(); xmlhttp.onreadystatechange= myFoo; xmlhttp.open("GET",url,true); Here is my callback function: function myFoo() { if (xmlhttp.readyState==4) { if (xmlhttp.status==200) { // Success message } else { // some error message } } } Now, where and when does the execution path start again? Once I make the call to open(), does execution continue directly below the open() and another "thread" enters the asynch function once the ajax request has been completed? Or, does the browser wait for the request to complete, make the Asynch call, and then execution continues right after the open? Thanks!

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• Date exception when trying to use date method

  - by Simon Andi

  Hi, I have defined a object model where one of the array elements is a string public static String[] columnNames6 = {"Total Shares", "Total Calls", "Call Strike", "Call Premium", "Call Expiry" }; public static Object[][] data6 = { { new Double(0), new Double(0), new Double(0), new Double(0),"dd/mm/yyyy"}, }; I then use the following code to get the date so that I can use the data method but having no joy - Can someone please tell me why it is throwing an exception after I do this String ExpiryDate = (String)GV.data6[0][4]; System.out.println("DATE STRING IS: " + ExpiryDate); Date EndOptionDate = new Date(ExpiryDate); // SOMETHING WRONG HERE even though it compiles okay //Get Todays's Date Date TodaysDate = new Date(); //Calculate Days Option Expiry long DaysDifference = EndOptionDate.getTime() - TodaysDate.getTime(); Would really appreciate some help as really stuck not sure how I should code the line in bold - new to java, so please excuses my lack of knowledge looked at tutorials can't seem to move forward. Thanks Simon

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• What can be done to speed up synchronous WCF calls?

  - by Dimitri C.

  My performance measurements of synchronous WCF calls from within a Silverlight application showed I can make 7 calls/s on a localhost connection, which is very slow. Can this be speeded up, or is this normal? This is my test code: const UInt32 nrCalls = 100; ICalculator calculator = new CalculatorClient(); // took over from the MSDN calculator example for (double i = 0; i < nrCalls; ++i) { var call = calculator.BeginSubtract(i + 1, 1, null, null); call.AsyncWaitHandle.WaitOne(); double result = calculator.EndSubtract(call); } Remarks: CPU load is almost 0%. Apparently, the WCF module is waiting for something. I tested this both on Firefox 3.6 and Internet Explorer 7. I'm using Silverlight v3.0

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• Why does mysqldump need to be fully pathed when called from a controller or model?

  - by Kris

  When I call mysqldump from a controller or model I need to fully path the binary, when I call it from Rake I don't need to. If I do not fully path I get a zero byte file... I can confirm both processes are run using the same user. # Works in a controller, model and Rake task system "/usr/local/mysql/bin/mysqldump -u root #{w.database_name} > #{target_file}" # Only works in a Rake task system "mysqldump -u root #{w.database_name} > #{target_file}" If I call the Rake task from the action it also fails (zero byte file). OS: Mac Ruby 1.8.6 EDIT: I use Etc.getpwuid(Process.uid).name to get the User of the current process

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• ::LookupAccountSid API Extremely Slow When Targetting x64 Platform (Windows 7)

  - by Chris

  During our application startup, we are making a call to ::LookupAccountSid(). When I build targetting the x86 architecture, this call is nearly instantaneous. However, when I target x64 (debug or release), the call generally takes over 40s to complete. Since this is occurring during application startup, the result is fairly unpleasant as it will appear to the user that the application is not launching. I am running Windows 7 Professional 64-bit on a Dell Studio XPS 16 (Intel Core i7 Q 720). Our application is a native Windows application written in C++. My compiler options (CCOPTS) and linker options (LINKOPTS) are as follows: CCOPTS = "/nologo /Gz /W3 /EHs /c /DWIN32 /D_MBCS /Ob1 /vmg /vmv /Zi /MD /DNDEBUG /DDV_BUILD_DLL /DIV_BUILD_DLL /DDVASSERT_EXCEPTION /Zc:wchar_t-" LINKOPTS = "/manifest:no /nologo /machine:X64 kernel32.lib user32.lib gdi32.lib winspool.lib comdlg32.lib advapi32.lib shell32.lib ole32.lib oleaut32.lib uuid.lib odbc32.lib odbccp32.lib /DEBUG /subsystem:windows /DLL" Any help would be greatly appreciated :D Thanks, --Chris

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• Dynamically load .asmx web-service

  - by Tierney

  I have an .aspx page that can perform a number of functions. The type of function is determined at run-time depending on which button the user clicks. This makes makes a web-service call to an .asmx method. The web-service call returns html and javascript which then become part of the original page. This new content has javascript events attached to button clicks, data validation etc. In turn these events then call their own web-service methods in another .asmx file. The main page does not know about these other .asmx files when the page loads. So, is there any way of dynamically loading these .asmx files on demand?

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• Precompile Lambda Expression Tree conversions as constants?

  - by Nathan

  It is fairly common to take an Expression tree, and convert it to some other form, such as a string representation (for example this question and this question, and I suspect Linq2Sql does something similar). In many cases, perhaps even most cases, the Expression tree conversion will always be the same, i.e. if I have a function public string GenerateSomeSql(Expression<Func<TResult, TProperty>> expression) then any call with the same argument will always return the same result for example: GenerateSomeSql(x => x.Age) //suppose this will always return "select Age from Person" GenerateSomeSql(x => x.Ssn) //suppose this will always return "select Ssn from Person" So, in essence, the function call with a particular argument is really just a constant, except time is wasted at runtime re-computing it continuously. Assuming, for the sake of argument, that the conversion was sufficiently complex to cause a noticeable performance hit, is there any way to pre-compile the function call into an actual constant?

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• Any way to get TStringList.CommaText to not escape commas with quotes?

  - by Mason Wheeler

  I'm doing some work with code generation, and one of the things I need to do is create a function call where one of the parameters is a function call, like so: result := Func1(x, y, Func2(a, b, c)); TStringList.CommaText is very useful for generating the parameter lists, but when I traverse the tree to build the outer function call, what I end up with looks like this: result := Func1(x, y, "Func2(a, b, c)"); It's quoting the third argument because it contains commas, and that produced invalid code. But I can't do something simplistic like StringReplace all double quotes with empty strings, because it's quite possible that a function argument could be a string with double quotes inside. Is there any way to make it just not escape the lines that contain commas?

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• Inheritance in Java

  - by Mandar

  Hello, recently I went through the inheritance concept. As we all know, in inheritance, superclass objects are created/initialized prior to subclass objects. So if we create an object of subclass, it will contain all the superclass information. But I got stuck at one point. Do the superclass and the subclass methods are present on separate call-stack? If it is so, is there any specific reason for same? If it is not so, why they don't appear on same call-stack? E.g. // Superclass class A { void play1( ) { // .... } } // Subclass class B extends A { void play2( ) { //..... } } Then does the above 2 methods i.e play1( ) and play2( ) appear on separate call stack? Thanks.

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• How to build a 4x game?

  - by Marco

  I'm trying to study how succefully implement a 4x game. Area of interest: 1) map data: how to store stellars systems (graphs?), how to generate them and so on.. 2) multiplayer: how to organize code in a non graphical server and a client to display it 3) command system: what are patters to catch user and ai decisions and handle them, adding at first "explore" and "colonize" then "combat", "research", "spy" and so on (commands can affect ships, planets, research, etc..) 4) ai system: ai can use commands to expand, upgrade planets and ship I know is a big questions, so help is appreciated :D 1) Map data Best choice is have a graph to model a galaxy. A node is a stellar system and every system have a list of planets. Ship cannot travel outside of predefined paths, like in Ascendancy: http://www.abandonia.com/files/games/221/Ascendancy_2.png Every connection between two stellar systems have a cost, in turns. Generate a galaxy is only a matter of: - dimension: number of stellar systems, - variety: randomize number of planets and types (desertic, earth, etc..), - positions of each stellar system on game space - connections: assure that exist a path between every node, so graph is "connected" (not sure if this a matematically correct term) 2) Multiplayer Game is organized in turns: player 1, player 2, ai1, ai2. Server take care of all data and clients just diplay it and collect data change. Because is a turn game, latency is not a problem :D 3) Command system I would like to design a hierarchy of commands to take care of this aspect: abstract Genericcommand (target) ExploreCommand (Ship) extends genericcommand colonizeCommand (Ship) buildcommand(planet, object) and so on. In my head all this commands are stored in a queue for every planets, ships or reasearch center or spy, and each turn a command is sent to a server to apply command and change data state 4) ai system I don't have any idea about this. Is a big topic and what I want is a simple ai. Something like "expand and fight against everyone". I think about a behaviour tree to control ai moves, so I can develop an ai that try to build ships to expand and then colonize planets, upgrade them throught science and combat enemies. Could be done with a finite state machine too ? any ideas, resources, article are welcome!

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• Most Efficient Way of calling an external webservice in Java?

  - by Sudheer

  In one of our applications we need to call the Yahoo Soap Webservice to Get Weather and other related info. I used the wsdl2java tool from axis1.4 and generated th required stubs and wrote a client. I use jsp's use bean to include the client bean and call methods defined in the client which call the yahoo webservice inturn. Now the problem: When users make calls to the jsp the response time of the webservice differs greatly, like for one user it took less then 10 seconds and the other in the same network took more than a minute. I was just wondering if Axis1.4 queues the requests even though the jsps are multithreaded. And finally is there an efficient way of calling the webservice(Yahoo weather). Typically i get around 200 simultaneous requests from my users.

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