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• TCP connection lost problems in c#

  - by alex

  Hi: In my application, I have a server listening on a port on localhost for client connection. Then I have clients running and establishes connection with the server. I used tcpListner in c# for the server and the clients were written in perl using Inet function. The connection between clients and server were established without a problem and a message from client is received by the server. However, after about 3 to 4 seconds, the connection is lost. I use netstat -a to see if the status of the connection is still "established". The result is "Close_wait" after I use netstat command on DOS. How can I debug this problem? Which side is causing the lost of connection? Thanks

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• asp.net ajax toolkit combobox dosen't work in hidden div

  - by sam

  i have a combobox inside a hidden div which i use css display = none to make it invisible, but when i make the div visible by setting display = block, the combobox just show the input and its button and ul list all have css as display = 'none', visibility ='hidden', i can tell it is done by combobox inbuild javascript because i tried to use javascript to set the css manually with no luck. It is a bug of combobox, urgent help needed, i spent a week to solve this, and our team put a lot trust on the toolkit ,please help me on this all javascript gurus , thanks. Admin please let my code sample be visible , thanks a lot. below is the code to reproduce the bug, run it you cant see the dropdown: <%@ Page Language="C#" AutoEventWireup="true" CodeBehind="Default.aspx.cs" Inherits="WebApplication1._Default" % <%@ Register Assembly="AjaxControlToolkit" Namespace="AjaxControlToolkit" TagPrefix="asp" % a d f click me <script type="text/javascript"> function show() { var d = $get('d'); d.style.display = 'block'; } </script>

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• nsthread in iphone xcode

  - by BibiBuBu

  Good Day! i want to use nsthreads in a project of xcode that will call a function which is for the network access and will check that if the network is there or not, so i need to have a thread which will execute after lets say 1 minutes to check the connectivity. and will continue run unless the app is closed. [NSThread detachNewThreadSelector:@selector(startTheBackgroundJob) toTarget:self withObject:nil]; startTheBackgroundJob NSAutoreleasePool *pool = [[NSAutoreleasePool alloc] init]; // wait for 3 seconds before starting the thread, you don't have to do that. This is just an example how to stop the NSThread for some time [NSThread sleepForTimeInterval:5]; //[self performSelectorInBackground:@selector(checkNet) withObject:nil]; [self performSelectorOnMainThread:@selector(checkNet) withObject:nil waitUntilDone:YES]; [pool release]; it works only for the first time but not any other, i mean only 1 loop it makes can somebody help me in this regard. Thanks

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• OpenGL ES Simple Undo Last Drawing

  - by Erika

  Hi Everyone, I am trying to figure out how to implement a simple "undo" of last drawing action on the iPhone screen. I draw by first preparing the frame buffer: [EAGLContext setCurrentContext:context]; glBindFramebufferOES(GL_FRAMEBUFFER_OES, viewFramebuffer); I then prepare the vertex array and draw this way: glVertexPointer(2, GL_FLOAT, 0, vertexBuffer); glDrawArrays(GL_POINTS, 0, vertexCount); glBindRenderbufferOES(GL_RENDERBUFFER_OES, viewRenderbuffer); [context presentRenderbuffer:GL_RENDERBUFFER_OES]; How do I simple undo this last action? There has to be a way to save previous state or an built-in OpenGL ES function, I would think. Thanks

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• Why does this call to jQuery's $.ajax() fire an empty request in Chrome and Firefox?

  - by Martin Wiboe

  Hello, I am trying to call a WCF RESTful service from jQuery. I am using JSON to encode both request and response. The following code functions correctly in IE8: url = 'http://ipv4.fiddler:5683/WeatherWCF/NewBinding/MyService/GetValueFloat'; $.ajax({ url: url, data: '{"alias": "Udetemperatur"}', type: "POST", contentType: "application/json; charset=utf-8", dataType: "text", // not "json" we'll parse success: function(res) { alert('Received response: ' + res); } }); However, in both Firefox and Chrome, res contains an empty string. After using Fiddler to monitor the request, it appears that jQuery sends an empty request to the server as shown in this screen dump: http://imgur.com/EJgwS.png This is the successful request: http://imgur.com/S77BA.png What am I doing wrong? Kind regards, Martin

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• Core Text's CTFramesetterSuggestFrameSizeWithConstraints() returns incorrect size everytime

  - by nsapplication

  According to the docs, CTFramesetterSuggestFrameSizeWithConstraints () "determines the frame size needed for a string range". Unfortunately the size returned by this function is never accurate. Here is what I am doing: NSAttributedString *string = [[[NSAttributedString alloc] initWithString:@"lorem ipsum" attributes:nil] autorelease]; CTFramesetterRef framesetter = CTFramesetterCreateWithAttributedString((CFAttributedStringRef) string); CGSize textSize = CTFramesetterSuggestFrameSizeWithConstraints(framesetter, CFRangeMake(0,0), NULL, CGSizeMake(rect.size.width, CGFLOAT_MAX), NULL); The returned size always has the correct width calculated, however the height is always slightly shorter than what is expected. Is this the correct way to use this method? Is there any other way to layout Core Text? Seems I am not the only one to run into problems with this method. See https://devforums.apple.com/message/181450.

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• SHELL OR PERL QUESTION

  - by user150674

  I have a very large file, named 'ColCheckMe', tab-delimited, that you are asked to process. You are told that each line in 'ColCheckMe' has 7 columns, and that the values in the 5th column are integers. Using shell functions indicate how you would verify that these conditions were satisfied in 'ColCheckMe' K got this... nawk ‘ NF != 7 { Printf(“[%d] has invalid [%d] number of fileds\n”, FNR, NF) } $5 !~ /^[0-9]+$/ { Printf(“[%d] 5th field is invalid [%s]\n”, FNR, $5) }’ ColCheckMe Now, 2. In with the similar file, you are told that each value in column 1 is unique. How would I verify that? Also write a shell function that counts the number of occurrences of the word “SpecStr” in the file 'ColCheckMe' Any one can help in SHELL or everything including the first in PERL Scripting.

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• JavaScriptSerializer with custom Type

  - by balint

  Hi, I have a function with a List return type. I'm using this in a JSON-enabled WebService like: [WebMethod(EnableSession = true)] [ScriptMethod(ResponseFormat = ResponseFormat.Json)] public List<Product> GetProducts(string dummy) /* without a parameter, it will not go through */ { return new x.GetProducts(); } this returns: {"d":[{"__type":"Product","Id":"2316","Name":"Big Something ","Price":"3000","Quantity":"5"}]} I need to use this code in a simple aspx file too, so I created a JavaScriptSerializer: JavaScriptSerializer js = new JavaScriptSerializer(); StringBuilder sb = new StringBuilder(); List<Product> products = base.GetProducts(); js.RegisterConverters(new JavaScriptConverter[] { new ProductConverter() }); js.Serialize(products, sb); string _jsonShopbasket = sb.ToString(); but it returns without a type: [{"Id":"2316","Name":"Big One ","Price":"3000","Quantity":"5"}] Does anyone have any clue how to get the second Serialization work like the first? Thanks!

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• NSIS: Access values of combo box of custom page?

  - by Xinus

  I have added custom page to NSIS installer using ini files, here is a code . . . ; Welcome page !insertmacro MUI_PAGE_WELCOME Page custom customPage "" ": custom page" . . . Function customPage GetTempFileName $R0 File /oname=$R0 customPage.ini InstallOptions::dialog $R0 Pop $R1 StrCmp $R1 "cancel" done StrCmp $R1 "back" done StrCmp $R1 "success" done error: MessageBox MB_OK|MB_ICONSTOP "InstallOptions error:$\r$\n$R1" done: FunctionEnd . . . Here is a customPage.ini file ; Ini file generated by the HM NIS Edit IO designer. [Settings] NumFields=2 [Field 1] Type=Label Text=Select Version: Left=4 Right=53 Top=16 Bottom=26 [Field 2] Type=Combobox Text=Combobox ListItems= Left=53 Right=138 Top=14 Bottom=107 I want to set values of combobox dynamically using NSIS script, how can I access combobox in nsis?

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• Python dictionary: add or increment entry

  - by cursa

  Hi everyone, I'm currently re-engaging with Python after a long absence and loving it. However, I find myself coming across a pattern over and over. I keep thinking that there must be a better way to express what I want and that I'm probably doing it the wrong way. The code that I'm writing is in the following form: # foo is a dictionary if foo.has_key(bar): foo[bar] += 1 else: foo[bar] = 1 I'm writing this a lot in my programs. My first reaction is to push it out to a helper function, but so often the python libraries supply things like this already. Is there some simple little syntax trick that I'm missing? Or is this the way that it should be done?

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• Haskell Convert Byte String To UTC Time

  - by Steve

  I have been trying to make a function in Haskell to take a ByteString which is a datetime and convert it to UTC time taking into account the time zone from the original encoding. I am very new to Haskell so I may be making a really basic mistake. convertStringToUtc s = do estTimeZone <- hoursToTimeZone -5 time <- read $ B.unpack(s) localTimeToUTC estTimeZone time The error I get is: Couldn't match expected type `Int -> b' against inferred type `UTCTime' In the expression: localTimeToUTC estTimeZone time In the expression: do { estTimeZone <- hoursToTimeZone - 5; time <- read $ B.unpack (s); localTimeToUTC estTimeZone time }

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• Updating multiple Sprites - AS3 performance best practices

  - by dani

  Within the container "BubbleContainer" I have multiple "Bubble sprites". Each bubble's graphics object (a circle) is updated on a timer event. Let's say I have 50 Bubble sprites and each circle's radius should be updated with a mathematical formula. How do I organize this logic? How do I update all Bubble sprites within the BubbleContainer? (should I call a bubble.update() function or make a temporary reference to the graphics object?) Where do I put the Math logic? (as static functions?)

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• .NET COM Interop with references to other libraries

  - by user262190

  Hello,I'm up against a problem when loading a class in a managed library from a COM Interop library. basically I have some Unmanaged C++ code and a COM Interop library written in C#. And finally a 3rd library which is referenced by the COM Interop library which contains a class: public class MyClass{ public MyClass(){} } What I'd like to do is from my unmanaged c++ code, call a function in the Interop library The C++ code doesn't need to know of the existence of the third library, it's only used within the Interop. Init(){ MyClass _class = new MyClass(); } for some reason this line in Init fails "MyClass _class = new MyClass();", and I don't get very usefull error messages, all I have to go on is a few of these in my output window: "First-chance exception at 0x7c812afb in DotNet_Com_Call.exe: Microsoft C++ exception: [rethrow] at memory location 0x00000000.." and the HRESULT of the "HRESULT hr = pDotNetCOMPtr-Init();" line in my C++ code is "The system cannot find the specified file" I'm new to COM so if anyone has any ideas or pointer to get me going the right direction, I'd appreciate it, Thanks

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• Works in firefox but not IE8

  - by creocare

  This is working fine in firefox but only closes the first page and then breaks in IE8. Firebug in IE8 says that x.item(o) is null. I can't figure out why this works in firefox but not IE. Thanks for any help. pager(x=document.getElementsByName("pg1")); function pager( x ) { var curr = document.getElementById('showing'); $(curr).fadeOut('fast'); curr.id = 'hide'; $(x).fadeIn('slow'); x.item(0).id ='showing'; }

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• why is this closing the new pop up window

  - by user295189

  I am trying to open a window and then redirecting the original page to a new location. It opens the window, however before redirecting the parent page, it closes the new window too. How can I fix that function orderPrint() { var n = new Object(); n. ID = <?php echo $ID->ID; ?>; n.action = posttothispage.php"; n.target = popWinCenterScreen("/common/html/empty.htm", parseInt(window.screen.height * 0.8), 796, "resize"); myFuction.PostRequest(n); window.location = “someotherpagethanthis.php”; }

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• How do I manipulate a jqGrid's search/filters?

  - by AaronSieb

  I have a jqGrid with a navBar that has search: true and multipleSearch: true. I would like to add a button to my UI that automatically adds an additional rule to the search. I've tried manipulating the postData for the filter directly, but values added this way don't show up in the search UI. I've also tried accessing the search box directly using jQuery, like this: $('#fbox_list').searchFilter().add(); $('#fbox_list .sf .data input').each(function(index) { alert($(this).val()); }); But, in addition to feeling hackish, it only works if the user has already clicked on the search button (the fbox_list div is not constructed on load). Has anyone else dealt with an issue like this?

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• Installing Recaptcha in Joomla 1.5 user registration

  - by Samuel

  I am trying to install ReCaptcha into the user registration of Joomla 1.5. This may just be an issue with Joomla but when i hit register nothing happens. I think it's doing some JavaScript form validation but there is nothing telling the user what went wrong. if, God forbid, they do fill out the form correctly Joomla will redirect the user to the homepage and give no notice of success. Is this a Joomla issue or is there something wrong with my install? Does anyone know of a plug-in or module for Joomla that would make this easier? Thanks in advance, Samuel UPDATE: Joomla does a lot of "stuff"/"something" to the $_POST and $_GET variables which was causing the reCaptcha to not function. This was for work which is past so I am not spending anymore time on it. Shameless Plug: use wordpress instead. this can be closed as I don't have time to verify which answer works

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• Assert a good practice or not ?

  - by rkenshin

  Is it a good practice to use Assert for function parameters to enforce their validity. I was going through the source code of Spring Framework and I noticed that they use Assert.notNull a lot. Here's an example public static ParsedSql parseSqlStatement(String sql) { Assert.notNull(sql, "SQL must not be null");} Here's Another one public NamedParameterJdbcTemplate(DataSource dataSource) { Assert.notNull(dataSource, "The [dataSource] argument cannot be null."); this .classicJdbcTemplate = new JdbcTemplate(dataSource); } public NamedParameterJdbcTemplate(JdbcOperations classicJdbcTemplate) { Assert.notNull(classicJdbcTemplate, "JdbcTemplate must not be null"); this .classicJdbcTemplate = classicJdbcTemplate; } Thank you

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• Doxygen ignoring inherited functions, when class inherits privately but the functions declared publi

  - by MichaelM

  Sorry for long winded title, this makes a lot more sense with an example. Suppose we have a class A: class A { public: void someFunction(); void someOtherFunction(); }; And another class that privately inherits from A. However, we re-declare one of the inherited functions as public: class B : private A { public: A::someFunction; } When this code is processed by Doxygen, it does not recognise the public declaration of someFunction in class B. Instead, it shows someFunction as a privately inherited function. This is incorrect. Is anybody aware of how to fix this? Cheers

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• Registry ReadString method is not working in Windows 7 in Delphi 7

  - by Tofig Hasanov

  The following code sample used to return me windows id before, but now it doesn't work, and returns empty string, dunno why. function GetWindowsID: string; var Registry: TRegistry; str:string; begin Registry := TRegistry.Create(KEY_WRITE); try Registry.Lazywrite := false; Registry.RootKey := HKEY_LOCAL_MACHINE; // Registry.RootKey := HKEY_CURRENT_USER; if CheckForWinNT = true then Begin if not Registry.OpenKeyReadOnly('\Software\Microsoft\Windows NT\CurrentVersion') then showmessagE('cant open'); end else Registry.OpenKeyReadOnly('\Software\Microsoft\Windows\CurrentVersion'); str := Registry.ReadString('ProductId'); result:=str; Registry.CloseKey; finally Registry.Free; end; // try..finally end; Anybody can help?

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• Django exclude(**kwargs) help

  - by shawnjan

  Hey guys/gals! I had a question for you, something that I can't seem to find the solution for... Basically, I have a model called Environment, and I am passing all of them to a view, and there are particular environments that I would like to exclude. Now, I know there is a exclude function on a queryset, but I can't seem to figure out how to use it for multiple options... For example, I tried this but it didn't work: kwargs = {"name": "env1", "name": "env2"} envs = Environment.objects.exclude( kwards ) But the only thing that it will exclude is the last "name" value in the list of kwargs. I understand why it does that now, but I still can't seem to exclude multiple objects with one command. Any help is much appreciated! Shawn

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• How to implement full text search in Django?

  - by Jannis

  I would like to implement a search function in a django blogging application. The status quo is that I have a list of strings supplied by the user and the queryset is narrowed down by each string to include only those objects that match the string. See: if request.method == "POST": form = SearchForm(request.POST) if form.is_valid(): posts = Post.objects.all() for string in form.cleaned_data['query'].split(): posts = posts.filter( Q(title__icontains=string) | Q(text__icontains=string) | Q(tags__name__exact=string) ) return archive_index(request, queryset=posts, date_field='date') Now, what if I didn't want do concatenate each word that is searched for by a logical AND but with a logical OR? How would I do that? Is there a way to do that with Django's own Queryset methods or does one have to fall back to raw SQL queries? In general, is it a proper solution to do full text search like this or would you recommend using a search engine like Solr, Whoosh or Xapian. What are there benefits? Thanks for taking the time

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• Understanding prototype method calls

  - by Tristan

  In trying to call a method on the CodeMirror javascript code editor. I'm new to javascript and trying to understand how object oriented stuff works. I'm having problems calling what I believe are methods. For instance, var editor = CodeMirror.fromTextArea('code', options); editor.grabKeys(function(e) { alert("Key event");}); This gives the Uncaught TypeError: Cannot call method 'grabKeys' of undefined. Looking at the editor object reveals that grabKeys seems to be located at editor.__proto__.grabKeys. How should I be thinking about this?

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• Difference between performSelectorInBackground and NSOperation Subclass

  - by AmitSri

  I have created one testing app for running deep counter loop. I run the loop fuction in background thread using performSelectorInBackground and also NSOperation subclass separately. I am also using performSelectorOnMainThread to notify main thread within backgroundthread method and [NSNotificationCenter defaultCenter] postNotificationName within NSOperation subclass to notify main thread for updating UI. Initially both the implementation giving me same result and i am able to update UI without having any problem. The only difference i found is the Thread count between two implementations. The performSelectorInBackground implementation created one thread and got terminated after loop finished and my app thread count again goes to 1. The NSOperation subclass implementation created two new threads and keep exists in the application and i can see 3 threads after loop got finished in main() function. So, my question is why two threads created by NSOperation and why it didn't get terminated just like the first background thread implementation? I am little bit confuse and unable to decide which implementation is best in-terms of performance and memory management. Thanks

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• Emacs X11 autocompletion (intellisense)

  - by JC

  Hi everyone, I use visual studio for day to day programming (read putting food in my mouth) but for personal programming (read c/c++ hacking) I use Emacs. Right now I am doing a programming exercise involving the X11 API. I am continually referring to the programming API manual to find the signature of function calls. What would be really nice would be if there was an emacs alternative to the visual studio intellisense. I know there is autocompletion for the language specifics. Is there such an extension available to Emacs? Or if not, is there way of creating one, maybe using the language specifics mechanism already used for auto completion?

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