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• Handling multiple column data with Java

  - by Ender

  I am writing an application that reads in a large number of basic user details in the following format; once read in it then allows the user to search for a user's details using their email: NAME ROLE EMAIL --------------------------------------------------- Joe Bloggs Manager [email protected] John Smith Consultant [email protected] Alan Wright Tester [email protected] ... The problem I am suffering is that I need to store a large number of details of all people that have worked at the company. The file containing these details will be written on a yearly basis simply for reporting purposes, but the program will need to be able to access these details quickly. The way I aim to access these files is to have a program that asks the user for the name of the unique email of the member of staff and for the program to then return the name and the role from that line of the file. I've played around with text files, but am struggling with how I would handle multiple columns of data when it comes to searching this large file. What is the best format to store such data in? A text file? XML? The size doesn't bother me, but I'd like to be able to search it as quickly as possible. The file will need to contain a lot of entries, probably over the 10K mark over time.

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• Populating Models from other Models in Django?

  - by JT

  This is somewhat related to the question posed in this question but I'm trying to do this with an abstract base class. For the purposes of this example lets use these models: class Comic(models.Model): name = models.CharField(max_length=20) desc = models.CharField(max_length=100) volume = models.IntegerField() ... <50 other things that make up a Comic> class Meta: abstract = True class InkedComic(Comic): lines = models.IntegerField() class ColoredComic(Comic): colored = models.BooleanField(default=False) In the view lets say we get a reference to an InkedComic id since the tracer, err I mean, inker is done drawing the lines and it's time to add color. Once the view has added all the color we want to save a ColoredComic to the db. Obviously we could do inked = InkedComic.object.get(pk=ink_id) colored = ColoredComic() colored.name = inked.name etc, etc. But really it'd be nice to do: colored = ColoredComic(inked_comic=inked) colored.colored = True colored.save() I tried to do class ColoredComic(Comic): colored = models.BooleanField(default=False) def __init__(self, inked_comic = False, *args, **kwargs): super(ColoredComic, self).__init__(*args, **kwargs) if inked_comic: self.__dict__.update(inked_comic.__dict__) self.__dict__.update({'id': None}) # Remove pk field value but it turns out the ColoredComic.objects.get(pk=1) call sticks the pk into the inked_comic keyword, which is obviously not intended. (and actually results in a int does not have a dict exception) My brain is fried at this point, am I missing something obvious, or is there a better way to do this?

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• C++ compiler errors in xamltypeinfo.g.cpp

  - by Richard Banks

  I must be missing something obvious but I'm not sure what. I've created a blank C++ metro app and I've just added a model that I will bind to in my UI however I'm getting a range of compiler warnings related to xamltypeinfo.g.cpp and I'm not sure what I've missed. My header file looks like this: #pragma once #include "pch.h" #include "MyColor.h" using namespace Platform; namespace CppDataBinding { [Windows::UI::Xaml::Data::Bindable] public ref class MyColor sealed : Windows::UI::Xaml::Data::INotifyPropertyChanged { public: MyColor(); ~MyColor(); virtual event Windows::UI::Xaml::Data::PropertyChangedEventHandler^ PropertyChanged; property Platform::String^ RedValue { Platform::String^ get() { return _redValue; } void set(Platform::String^ value) { _redValue = value; RaisePropertyChanged("RedValue"); } } protected: void RaisePropertyChanged(Platform::String^ name); private: Platform::String^ _redValue; }; } and my cpp file looks like this: #include "pch.h" #include "MyColor.h" using namespace CppDataBinding; MyColor::MyColor() { } MyColor::~MyColor() { } void MyColor::RaisePropertyChanged(Platform::String^ name) { if (PropertyChanged != nullptr) { PropertyChanged(this, ref new Windows::UI::Xaml::Data::PropertyChangedEventArgs(name)); } } Nothing too tricky, but when I compile I get errors in xamltypeinfo.g.cpp indicating that MyColor is not defined in CppDataBinding. The relevant generated code looks like this: if (typeName == "CppDataBinding.MyColor") { userType = ref new XamlUserType(this, typeName, GetXamlTypeByName("Object")); userType->Activator = ref new XamlTypeInfo::InfoProvider::Activator( []() -> Platform::Object^ { return ref new CppDataBinding::MyColor(); }); userType->AddMemberName("RedValue", "CppDataBinding.MyColor.RedValue"); userType->SetIsBindable(); xamlType = userType; } If I remove the Bindable attribute from MyColor the code compiles. Can someone tell me what blindingly obvious thing I've missed so I can give myself a facepalm and fix the problem?

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• Improving long-polling Ajax performance

  - by Bears will eat you

  I'm writing a webapp (Firefox-compatible only) which uses long polling (via jQuery's ajax abilities) to send more-or-less constant updates from the server to the client. I'm concerned about the effects of leaving this running for long periods of time, say, all day or overnight. The basic code skeleton is this: function processResults(xml) { // do stuff with the xml from the server } function fetch() { setTimeout(function () { $.ajax({ type: 'GET', url: 'foo/bar/baz', dataType: 'xml', success: function (xml) { processResults(xml); fetch(); }, error: function (xhr, type, exception) { if (xhr.status === 0) { console.log('XMLHttpRequest cancelled'); } else { console.debug(xhr); fetch(); } } }); }, 500); } (The half-second "sleep" is so that the client doesn't hammer the server if the updates are coming back to the client quickly - which they usually are.) After leaving this running overnight, it tends to make Firefox crawl. I'd been thinking that this could be partially caused by a large stack depth since I've basically written an infinitely recursive function. However, if I use Firebug and throw a breakpoint into fetch, it looks like this is not the case. The stack that Firebug shows me is only about 4 or 5 frames deep, even after an hour. One of the solutions I'm considering is changing my recursive function to an iterative one, but I can't figure out how I would insert the delay in between Ajax requests without spinning. I've looked at the JS 1.7 "yield" keyword but I can't quite wrap my head around it, to figure out if it's what I need here. Is the best solution just to do a hard refresh on the page periodically, say, once every hour? Is there a better/leaner long-polling design pattern that won't put a hurt on the browser even after running for 8 or 12 hours? Or should I just skip the long polling altogether and use a different "constant update" pattern since I usually know how frequently the server will have a response for me?

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• Development Environment in a VM against an isolated development/test network

  - by bart

  I currently work in an organization that forces all software development to be done inside a VM. This is for a variety of risk/governance/security/compliance reasons. The standard setup is something like: VMWare image given to devs with tools installed VM is customized to suit project/stream needs VM sits in a network & domain that is isolated from the live/production network SCM connectivity is only possible through dev/test network Email and office tools need to be on live network so this means having two separate desktops going at once Heavyweight dev tools in use on VMs so they are very resource hungry Some problems that people complain about are: Development environment runs slower than normal (host OS is windows XP so memory is limited) Switching between DEV machine and Email/Office machine is a pain, simple things like cut and paste are made harder. This is less efficient from a usability perspective. Mouse in particular doesn't seem to work properly using VMWare player or RDP. Need a separate login to Dev/Test network/domain Has anyone seen or worked in other (hopefully better) setups to this that have similar constraints (as mentioned at the top)? In particular are there viable options that would remove the need for running stuff in a VM altogether?

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• SQLite NHibernate configuration with .Net 4.0 and vs 2010

  - by Berryl

  I am having way too much trouble getting my environment straight after switching to 2010 and .net 4.0, so I'd like to break the whole process down once and for all. 1) Which SQLite dll?? I think it is SQLite-1.0.65.1-vs2010rc-net4-setup.zip. Yes? 2) I ran the installer so the dll is in the GAC but I usually find there are less problems if I can just reference the dll stand alone. Is there any reason it needs to be in the GAC, and if not, what's the best way to uninstall it from the GAC (I can get to the GAC folder but it says I need permission to delete the files; should I leave the SQLite Designer dll's there?)? 3) x64. There is an x64 dll in the download. I had problems with SQLite in the past though that I could only resolve by compiling to x86. Can I safely reference the x64 dll and compile to Any CPU now? 4) what is the right NHib config? I have been using the one below, but since the error I get says "Could not create the driver from NHibernate.Driver.SQLite20Driver." that configuration is guilty until proven innocent too? 5) could FNH be a problem too? I don't use the pre-configured fluent SQLite method but FNH has to provide a reference to it for that to work, no? TIA & Cheers, Berryl <hibernate-configuration xmlns="urn:nhibernate-configuration-2.2"> ... <property name="dialect">NHibernate.Dialect.SQLiteDialect</property> <property name="connection.driver_class">NHibernate.Driver.SQLite20Driver</property> <property name="connection.connection_string">Data Source=:memory:;Version=3;New=True;</property> .... </hibernate-configuration>

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• Eclipse: Cannot install CDT because of a conflicting dependency

  - by MarkZar

  my eclipse has been configured for Java and pydev, now i want to configure C/C++ development tools with Eclipse. i dont want to download the whole Eclipse IDE for C/C++ Developers, for it is not convenient. so i decided to install CDT in my Eclipse. Help == Install New Software, then input http://download.eclipse.org/tools/cdt/releases/indigo, waited for a while, and chose the following CDT Main Features, CDT Optional Features, and Next, then an error occurred. Cannot complete the install because of a conflicting dependency. Software being installed: C/C++ DSF GDB Debugger Integration 4.0.0.201106081058 (org.eclipse.cdt.gnu.dsf.feature.group 4.0.0.201106081058) Software being installed: C/C++ Development Tools SDK 8.0.2.201202111925 (org.eclipse.cdt.sdk.feature.group 8.0.2.201202111925) Only one of the following can be installed at once: GDB DSF Debugger Integration Core 4.0.0.201106081058 (org.eclipse.cdt.dsf.gdb 4.0.0.201106081058) GDB DSF Debugger Integration Core 4.0.2.201202111925 (org.eclipse.cdt.dsf.gdb 4.0.2.201202111925) GDB DSF Debugger Integration Core 4.0.1.201109151620 (org.eclipse.cdt.dsf.gdb 4.0.1.201109151620) Cannot satisfy dependency: From: C/C++ Development Tools 8.0.2.201202111925 (org.eclipse.cdt.feature.group 8.0.2.201202111925) To: org.eclipse.cdt.gnu.dsf.feature.group [4.0.1.201202111925] Cannot satisfy dependency: From: C/C++ DSF GDB Debugger Integration 4.0.0.201106081058 (org.eclipse.cdt.gnu.dsf.feature.group 4.0.0.201106081058) To: org.eclipse.cdt.dsf.gdb [4.0.0.201106081058] Cannot satisfy dependency: From: C/C++ DSF GDB Debugger Integration 4.0.1.201202111925 (org.eclipse.cdt.gnu.dsf.feature.group 4.0.1.201202111925) To: org.eclipse.cdt.dsf.gdb [4.0.2.201202111925] Cannot satisfy dependency: From: C/C++ Development Tools SDK 8.0.2.201202111925 (org.eclipse.cdt.sdk.feature.group 8.0.2.201202111925) To: org.eclipse.cdt.feature.group [8.0.2.201202111925] i have googled for a lot of time, but still cannot find a valid solution. can anyone give a hand to me? thanks a lot!

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• How do I deselect grid row when grouping in David Poll's silverlight CollectionPrinter

  - by kpg

  I'm using David Poll's CollectionPrinter and modifications by Fama to perform grouping. I'm using the control to print a datagrid with grouping and it works well if not a little slow. Problem: When the grid is displayed the first row of the grid is selected and the first cell of the row is also selected. I want to either deselect the row or change the datagrid template to make selected rows/cells appear as not selected. I tried to specify a grid template to change the row/cell selection appearance but when I added the default template I got a COM error of all things - anyway I concluded that what I was doing was not compatible with the SLab libraries, or perhaps because the grid was specified in a datatemplate. In any case I abandoned that approach. Since I have the SLab source if I understood it more there may be a way to deselect the row after from that side of things - but I know the SLaB CommectionPrinter does not rely on the data template to be a grid, so I'm not sure how to modify the code to accomplish what I want. Question: How can I prevent the row from being selected or deselect it once it is or change the appearance of the selectd row when using the CollectionPrinter with grouping? Note that the row selection problem may occur without grouping as well, I don;t know, but it definatly does with grouping.

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• How do I get folder size with Exchange Web Services 2010 Managed API?

  - by Adam Tuttle

  I'm attempting to use EWS 2010 Managed API to get the total size of a user's mailbox. I haven't found a web service method to get this data, so I figured I would try to calculate it. I found one seemingly-applicable question on another site about finding mailbox sizes with EWS 2007, but either I'm not understanding what it's asking me to do, or that method just doesn't work with EWS 2010. Noodling around in the code insight, I was able to write what I thought was a method that would traverse the folder structure recursively and result in a combined total for all folders inside the Inbox: private int traverseChildFoldersForSize(Folder f) { int folderSizeSum = 0; if (f.ChildFolderCount > 0) { foreach (Folder c in f.FindFolders(new FolderView(10000))) { folderSizeSum += traverseChildFoldersForSize(c); } } folderSizeSum += (int)f.ManagedFolderInformation.FolderSize; return folderSizeSum; } (Assumes there aren't more than 10,000 folders inside a given folder. Figure that's a safe bet...) Unfortunately, this doesn't work. I'm initiating the recursion with this code: Folder root = Folder.Bind(svc, WellKnownFolderName.Inbox); int totalSize = traverseChildFoldersForSize(root); But a Null Pointer Exception is thrown, essentially saying that [folder].ManagedFolderInformation is a null object reference. For clarity, I also attempted to just get the size of the root folder: Console.Write(root.ManagedFolderInformation.FolderSize.ToString()); Which threw the same NPE exception, so I know that it's not just that once you get to a certain depth in the directory tree that ManagedFolderInformation doesn't exist. Any ideas on how to get the total size of the user's mailbox? Am I barking up the wrong tree?

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• how to close colorbox within iframe?

  - by Ashish Rajan

  i have a page manageGroup.php, where user can also add member to group. I used colorbox to show the addGroupMember.php. Now i need to close that colorbox once i have done submitting the form. javascript i am using in manageGroup.php <script language="javascript" type="text/javascript" src="js/jquery-1.3.2.js"></script> <script type="text/javascript" src="js/dropdown.js"></script> <script type="text/javascript" src="js/jquery.colorbox.js"></script> <script type="text/javascript"> $(document).ready(function(){ $(".iframe").colorbox({width:"80%", height:"80%", iframe:true}); }); </script> The link i am using to open colorbox <a class="iframe" href="addGMember.php?id=<?php echo base64_encode($fetch->g_id)?>">Add Member</a> the code in addGroupMember.php is like this:- if($_POST['add']=="Go") { $gid = $_POST['id']; $ii=0; $insert = "INSERT INTO ".DBGMEMBER." (gm_g_id,gm_m_id) VALUES "; foreach($_POST['gMember'] as $gMember) { if($ii==0) { $insert .= " ('".$gid."' , '".$gMember."')"; } else { $insert .= " ,('".$gid."' , '".$gMember."')"; } $ii++; } $db->execute($insert);// after this i want to close the colorbox echo "<script>parent.$.fn.colorbox.close(); </script>";// code i used, but not working }

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• DOM: element created with cloneNode(true) missing element when added to DOM

  - by user149327

  I'm creating a tree control and I'm attempting to use a parent element as a template for its children. To this end I'm using the element.cloneNode(true) method to deep clone the parent element. However when I insert the cloned element into the DOM it is missing certain inner elements despite having an outerHTML value identical to its parent. Surprisingly I observe the same behavior is in IE, Firefox, and Chrome leading me to believe that it is by design. This is the HTML for the node I'm attempting to clone. <SPAN class=node><A class=nodeLink href="/SparklerRestService2.aspx?q={0}" name=http://dbpedia.org/data/Taylor_Swift.rdf> <IMG class=nodeIcon alt="Taylor Swift" src="images/node.png"><SPAN class=nodeText>Taylor Swift</SPAN></A><SPAN class=nodeDescription>Taylor Swift is a swell gall who is realy great.</SPAN></SPAN> Once I've cloned the node using cloneNode(true) I examine the outerHTML property and find that it is indeed identical to the original. <SPAN class=node><A class=nodeLink href="/SparklerRestService2.aspx?q={0}" name=http://dbpedia.org/data/Taylor_Swift.rdf><IMG class=nodeIcon alt="Taylor Swift" src="images/node.png"><SPAN class=nodeText>Taylor Swift</SPAN></A><SPAN class=nodeDescription>Taylor Swift is a swell gall who is realy great.</SPAN></SPAN> However when I insert it into the DOM and inspect the result using FireBug I find that the element has been transformed: <span class="node" style="top: 0px; left: 0px;"<a class=nodeLink href="/SparklerRestService2.aspx?q={0}" name=http://dbpedia.org/data/Taylor_Swift.rdf>Taylor Swift</a><span class="nodeDescription">It's great</span></span> Notice that the grandchildren of the node (the image tag and the span tag surrounding "Taylor Swift") are missing, although strangely the great grandchild "Taylor Swift" text node has made it into the tree. Can anyone shed some light on this behavior? Why would nodes disappear after insertion into the DOM, and why am I seeing the same result in all three major browser engines?

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• Android: SharedPreference: Defaults not set at startup...

  - by Allan

  I have Listpreferences in my app. They don't appear to be setting to their defaults right after installation - they appear to be null. I'm trying to figure out why my default preferences are not being set right after installation. In my main code I have: SharedPreferences sp = PreferenceManager.getDefaultSharedPreferences(this); InUnits = sp.getString("List1", "defValue"); InAngs = sp.getString("List2", "defValue"); OutUnits = sp.getString("List3", "defValue"); OutAngs = sp.getString("List4", "defValue"); Right after the above code executes, each variable contains "defValue" instead of the actual values I have assigned in my ListPreference below. My preference xml file is called, "settings.xml". Here's what one of the ListPreferences there looks like: <ListPreference android:key="List1" android:title="Input: Alph" android:summary="Choose Alph or Ralph" android:entries="@array/inputAlph" android:entryValues="@array/input_Alph_codes" android:dialogTitle="Input Alph" android:defaultValue="ININ"/> Here's what some of my strings.xml file looks like: <string-array name="inputUnits"> <item>Alph</item> <item>Ralph</item> </string-array> <string-array name="input_Alph_codes"> <item>ININ</item> <item>INMM</item> </string-array> When I go to menu, and then settings, I can see my defaults checked (radiobuttoned). Then when I go back from the settings menu to my main screen - all is well - for life! ...then each var above is assigned the proper default value. This only happens when I first install my app on the phone. After I go to the settings screen once and then right out of it, the app is fine and accepts any setting changes. By the way, as you can see, "List1" is the android:key within a file called settings.xml in my res/xml folder.

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• Silverlight async calls and anonymous methods....

  - by JLewis

  I know there are a couple of debates on this kind of thing.... At any rate, I have several cases where I need to populate combobox items based on enumerations returned from the WCF service. In an effort to keep code clean, I started this approach. After looking into it more, I don't think the this works as well is initially thought... I am throwing this out to get recommendations/advice/code snippets on how you would do this or how you currently do this. I may be forced to have a seperate, non anonymous method, procedure. I hate doing this for something like this but at the moment, don't see it working another way... EventHandler<GetEnumerationsForTypeCompletedEventArgs> ev = null; ev = delegate(object eventSender, GetEnumerationsForTypeCompletedEventArgs eventArgs) { if (eventArgs.Error == null) { //comboBox.ItemsSource = eventArgs.Result; // populate combox for display purposes (for now) foreach (Enumeration e in eventArgs.Result) { ComboBoxItem cbi = new ComboBoxItem(); cbi.Content = e.EnumerationValueDisplayed; comboBox.Items.Add(cbi); } // remove event so we don't keep adding new events each time we need an enumeration proxy.GetEnumerationsForTypeCompleted -= ev; } }; proxy.GetEnumerationsForTypeCompleted += ev; proxy.GetEnumerationsForTypeAsync(sEnumerationType); Basically in this example we use ev to hold the anonymous method so we can then use ev from within the method to remove it from the events once called. This prevents this method from getting called more than one time. I suspect that the comboBox local var declared before this call, but within the same method, is not always the combobox originally intended but can't really verify that yet. I may add a tag to it to do some tests and populating to verify. Sorry if this is not clear. I can elaborate more if needed. Thanks Jeff

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• How to best transfer large payloads of data using wsHttp with WCF with message security

  - by jpierson

  I have a case where I need to transfer large amounts of serialized object graphs (via NetDataContractSerializer) using WCF using wsHttp. I'm using message security and would like to continue to do so. Using this setup I would like to transfer serialized object graph which can sometimes approach around 300MB or so but when I try to do so I've started seeing a exception of type System.InsufficientMemoryException appear. After a little research it appears that by default in WCF that a result to a service call is contained within a single message by default which contains the serialized data and this data is buffered by default on the server until the whole message is completely written. Thus the memory exception is being caused by the fact that the server is running out of memory resources that it is allowed to allocate because that buffer is full. The two main recommendations that I've come across are to use streaming or chunking to solve this problem however it is not clear to me what that involves and whether either solution is possible with my current setup (wsHttp/NetDataContractSerializer/Message Security). So far I understand that to use streaming message security would not work because message encryption and decryption need to work on the whole set of data and not a partial message. Chunking however sounds like it might be possible however it is not clear to me how it would be done with the other constraints that I've listed. If anybody could offer some guidance on what solutions are available and how to go about implementing it I would greatly appreciate it. Related resources: Chunking Channel How to: Enable Streaming Large attachments over WCF Custom Message Encoder Another spotting of InsufficientMemoryException I'm also interested in any type of compression that could be done on this data but it looks like I would probably be best off doing this at the transport level once I can transition into .NET 4.0 so that the client will automatically support the gzip headers if I understand this properly.

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• Migrating complex SVN branch hierarchy to Mercurial

  - by Christian Hang

  Our team has been using SVN for managing an application of decent size and over time a rather complex hierarchy of branches and tags has built up, which is following the basic standard layout for SVN repositories, but is more nested: |-trunk |-branches | |-releases | | |-releaseA | | `-releaseB | `-features | |-featureX | `-featureY |-tags |-releaseA | |-beta | `-RTP `-releaseB |-beta `-RTP (The feature branches are obviously temporary branches but we have to take them into consideration as it won't be feasible to close all of them at once in the near future) For several reasons but primarily because merges have been becoming an increasing pain, we are considering to switch to Mercurial. The main problem we are currently facing is migrating the existing code base without losing our history. I've tried several migration tools (e.g., yasvn2hg, hg convert and svn2hg) with yasvn2hg being the most promising, but none of them seem to be able to deal with nested hierarchies but they all assume that branches and tags are organized in one flat directory respectively. The choice between named branches or clones as the conversion target of old SVN branches is not a limiting factor in this case, as either solution would be appreciated. We are currently experimenting with both options and how they would fit into our current processes but haven't decided on one yet. I'd obviously be interested in recommendations or experiences with similar setups concerning that issue as well. So, what is the best way to convert a nested SVN branch hierarchy like this to Mercurial? Converting one branch at a time into a separate repository would be quite annoying and I am not sure if that would be the right approach in the first place, depending on how the tools handle historic merges and need to be aware of all other branches?

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• ASP.NET MVC 2.0 Validation and ErrorMessages

  - by Raj Aththanayake

  I need to set the ErrorMessage property of the DataAnnotation's validation attribute in MVC 2.0. For example I should be able to pass an ID instead of the actual error message for the Model property, for example... [StringLength(2, ErrorMessage = "EmailContentID")] [DataType(DataType.EmailAddress)] public string Email { get; set; } Then use this ID ("EmailContentID") to retrieve some content(error message) from a another service e.g database. Then the error error message is displayed to the user instead of the ID. In order to do this I need to set the DataAnnotation validation attribute’s ErrorMessage property. It seems like a stright forward task by just overriding the DataAnnotationsModelValidatorProvider‘s protected override IEnumerable GetValidators(ModelMetadata metadata, ControllerContext context, IEnumerable attributes) However it is complicated now.... A. MVC DatannotationsModelValidator’s ErrorMessage property is readonly. So I cannot set anything here B. System.ComponentModel.DataAnnotationErrorMessage property(get and set) which is already set in MVC DatannotationsModelValidator so I cannot set it again. If I try to set it I get “The property cannot set more than once…” error message. public class CustomDataAnnotationProvider : DataAnnotationsModelValidatorProvider { protected override IEnumerable<ModelValidator> GetValidators(ModelMetadata metadata, ControllerContext context, IEnumerable<Attribute> attributes) { IEnumerable<ModelValidator> validators = base.GetValidators(metadata, context, attributes); foreach (ValidationAttribute validator in validators.OfType<ValidationAttribute>()) { messageId = validator.ErrorMessage; validator.ErrorMessage = "Error string from DB And" + messageId ; } //...... } } Can anyone please give me the right direction on this? Thanks in advance.

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• The LoadLibraryA method returns error code 1114 (ERROR_DLL_INIT_FAILED) after more than 1000 cycles

  - by Javier

  Hi, I'm programing on C++, I'm using Visual Studio 2008, Windows XP, and I have the following problem: My application, that is a DLL that can be used from Python, loads an external dll, uses the required methods, and then unloads this external Dll. It's working properly, but after more than 1000 cycles the method "LoadLibraryA" returns a NULL reference. The main steps are: HINSTANCE h = NULL; h = LoadLibraryA(dllfile.c_str()); DWORD dw = GetLastError(); The error got is: ERROR_DLL_INIT_FAILED 1114 (0x45A) A dynamic link library (DLL) initialization routine failed. The Dll is unloaded by using the following: FreeLibrary(mDLL); mDLL = NULL; Where mDLL is defined like this: HINSTANCE mDLL; First alternative tried: Just load the Dll only once, and unloaded it when the application ends. This fix the problem but introduces a new one. When the application ends, instead of first executing the DllMain method of my applicaion, wich unloads the external DLL, is executing first the DllMain method of the other Dll. This cause the following error because my application is trying to unload a Dll that was unload by itself previously. "Unhandled exception at 0x04a00d07 (DllName.DLL) in Python.exe: 0xC0000005: Access violation reading location 0x0000006b". Any suggestion will be welcomed. Thanks in advance. Regards.

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• C# - foreach showing strange behavior / for working with no problem

  - by Marks

  Hi there. Today I coded a function that uses two nested foreach loops. After seeing, that it did not work like expected, i debugged it. But I dont see an error, and dont think a simple error can cause the behavior i have noticed. The part looks like this: foreach(MyClass cItem in checkedListBoxItemList.Items) { foreach(MyClass cActiveItem in ActiveItemList) { if (cActiveItem.ID == cItem.ID) /*...check checkbox for item...*/; } } Lets say, checkedListBoxItemList.items holds 4 items of type MyClass, and ActiveItemList is a List< MyClass with 2 Items. The debugger jumps into the outer foreach, reaches inner foreach, executes the if 2 times (once per cActiveItem) and reaches the end of the outer foreach.Now, the debugger jumps back to the head of the outer foreach as it should. But instead of starting the second round of the outer foreach, the debugger suddenly jumps into the MyClass.ToString() method. I can step through this method 4 times (number of items in checkedListBoxItemList.Items) and then ... nothing. Visual Studio shows me my windows form, and the foreach is not continued. When changing the code to int ListCount = checkedListBoxItemList.Items.Count; for(int i=0; i<ListCount; i++) { MyClass cItem = checkedListBoxItemList.Items[i] as MyClass; foreach(MyClass cActiveItem in ActiveItemList) { if (cActiveItem.ID == cItem.ID) /*...check checkbox for item...*/; } } everything works fine and as supposed. I showed the problem to a collegue, but he also didnt understand, what happened. I dont understand why the debugger jumps into the MyClass.ToString() method. I used F10 to step through, so no need to leave the function. And even, if there is a reason, why isnt the foreach loop continued? Im using Visual Studio 2010, if this is of any matter. Please tell me what happened. Thanks.

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• Finding most efficient transmission size in varying network latency scenarios

  - by rwmnau

  I'm building a .NET remoting client/server that will be transmitting thousands of files, of varying sizes (everything from a few bytes to hundreds of MB), and I'm curious about a general method for finding the appropriate transmission size. As I see it, there's the following tradeoff: Serialize entire file into a transmission object and transmit at once, regardless of size. This would be the fastest, but a failure during tranmission requires that the whole file be re-transmitted. If the file size is larger than something small (like 4KB), break it into 4KB chunks and transmit those, re-assembling on the server. In addition to the complexity of this, it's slower because of continued round-trips and acknowledgements, though a failure of any one piece doesn't waste much time. The ideal transmission method (when taking into account negotiation latency vs. failure rate) is somewhere in between, and I'm wondering about how to find out the best size for that particular client. Do I have some dynamic tuning step in my transmission that looks at the current bytes/second average, and then raises the transmission size until the speed starts to drop (failures overwhelm negotiation cost)? Or is there some other method for determining ideal transmission size? The application will be multi-threaded, so number of threads also factors in to the calculation. I'm not looking for a formula (though I'll take one if you've got it), but just what to consider as I create this process.

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• How to invoke WPF Dispatcher in Nunit?

  - by Reporting Avatar

  I want to test an application which renders a text block with a data field value. I would like to get the actual width and actual height, once the rendering completes. Everything works fine. The problem came first, when I tried to test the application. I'm unable to invoke the dispatcher from the test project. Following is the code. this.Loaded += (s, e) => { TextBlock textBlock1 = new TextBlock(); //// Text block value is assigned from data base field. textBlock1.Text = strValueFromDataBaseField; //// Setting the wrap behavior. textBlock1.TextWrapping = TextWrapping.WrapWithOverflow; //// Adding the text block to the layout canvas. this.layoutCanvas.Children.Add(textBlock1); this.Dispatcher.BeginInvoke(DispatcherPriority.Background, (Action)(() => { //// After rendering the text block with the data base field value. Measuring the actual width and height. this.TextBlockActualWidth = textBlock1.ActualWidth; this.TextBlockActualHeight = textBlock1.ActualHeight; //// Other calculations based on the actual widht and actual height. } )); }; I've just started using the NUnit. So, please help me. Thanks

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• jQuery Cycle plugin pagerAnchorBuilder images becoming undefined

  - by Casey Becking

  I have a slideshow built in flash that I want to mimic in jQuery. The slide show uses the images from the slideshow as the pager numbers. The problem im having is once i apply links to the slideshow images the pagerAnchorBuilder image returns an undefined for the src of the image. Javascript - $(function() { $('#slideshow').before('<ul id="nav">').cycle({ fx: 'fade', timeout: 7000, pager: '#nav', pagerAnchorBuilder: function(idx, slide) { return '<li><a href="#"><img src="' + slide.src + '" width="100" height="60" /></a></li>'; } }); }); HTML - <div id="slideshow" class="pics"> <a href="http://google.com"><img src="home_1.jpg" width="1000" height="600" /></a> <a href="http://google.com"><img src="home_2.jpg" width="1000" height="600" /></a> <a href="http://google.com"><img src="home_3.jpg" width="1000" height="600" /></a> <a href="http://google.com"><img src="home_4.jpg" width="1000" height="600" /></a> <a href="http://google.com"><img src="home_5.jpg" width="1000" height="600" /></a> </div> If i remove the href's from the slideshow the images in the pager show up without issues. Im not sure if this is a bug or something i need to find a fix for?

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• Integrating PartCover.NET with NAnt

  - by davandries

  Hello, I'm trying to integrate PartCover.NET with NAnt and CruiseControl.NET I can run PartCover.NET browser without problems, but it does not work once I try to run it in an NAnt task (in my CCNET build). There must be an issue with my NAnt target but I can't find it. Maybe someone had experienced the same issues in the past?. <target name="CoverageUnitTest" description="Code coverage of unit tests"> <exec program="${PartCover.exe}"> <arg value="--target=${NUnit.console}" /> <arg value="--target-work-dir=${project.dir}\bin\${configuration}"/> <arg value="--target-args=${project}.dll" /> <arg value="--output=C:\partcover.xml" /> <arg value="--include=[*]*" /> </exec> </target> In CruiseControl, I got the following error message: [exec] Invalid option '--target C:\NUnit\bin\nunit-console.exe' Build Error: NAnt.Core.BuildException External Program Failed: C:\PartCover\PartCover.exe (return code was -1) in C:\default.build line: 20 col: 4 at NAnt.Core.Tasks.ExternalProgramBase.ExecuteTask() at NAnt.Core.Tasks.ExecTask.ExecuteTask() at NAnt.Core.Task.Execute() at NAnt.Core.Target.Execute() at NAnt.Core.Project.Execute(String targetName, Boolean forceDependencies) at NAnt.Core.Project.Execute() at NAnt.Core.Project.Run() thanks ! David

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• Mysql Algorithm for Determining Closest Colour Match

  - by buggedcom

  I'm attempting to create a true mosaic application. At the moment I have one mosaic image, ie the one the mosaic is based on and about 4000 images from my iPhoto library that act as the image library. I have already done my research and analysed the mosaic image. I've converted it into 64x64 slices each of 8 pixels. I've calculated the average colour for each slice and assertain the r, g, b and brightness (Luminance (perceived option 1) = (0.299*R + 0.587*G + 0.114*B)) value. I have done the same for each of the image library photos. The mosaic slices table looks like so. slice_id, slice_image_id, slice_slice_id, slice_image_column, slice_image_row, slice_colour_hex, slice_rgb_red, slice_rgb_blue, slice_rgb_green, slice_rgb_brightness The image library table looks like so. upload_id, upload_file, upload_colour_hex, upload_rgb_red, upload_rgb_green, upload_rgb_blue, upload_rgb_brightness So basically I'm reading the image slices from the slices table into PHP and then pulling out the appropriate images from the library table based on the colour hexs. My trouble is that I've been on this too long and probably had too many energy drinks so am not concentrating properly, I can't figure out the way to pick out the nearest colour neighbor if the appropriate hex code doesn't exist. Any ideas on the perfect query? NB: I know pulling out the slices one by one is not ideal however the mosaic is only rebuilt periodically so a sudden burst in the mysql load doesn't really bother me, however if there us a way to pull the images out all at once that would also be a massive bonus.

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• UIView animation VS core animation

  - by Tom Irving

  I'm trying to animate a view sliding into view and bouncing once it hits the side of the screen. A basic example of the slide I'm doing is as follows: // The view is added with a rect making it off screen. [UIView beginAnimations:nil context:NULL]; [UIView setAnimationBeginsFromCurrentState:YES]; [UIView setAnimationDuration:0.07]; [UIView setAnimationCurve:UIViewAnimationCurveLinear]; [UIView setAnimationDelegate:self]; [UIView setAnimationDidStopSelector:@selector(animationDidStop:finished:context:)]; [theView setFrame:CGRectMake(-5, 0, theView.frame.size.width, theView.frame.size.height)]; [UIView commitAnimations]; More animations are then called in the didStopSelector to make the bounce effect. The problem is when more than one view is being animated, the bounce becomes jerky and, well, doesn't bounce anymore. Before I start reading up on how to do this in Core Animation, (I understand it's a little more difficult) I'd like to know if there is actually an advantage using Core Animation rather than UIView animations. If not, is there something I can do to improve performance?

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• ng-grid checkbox with filtering

  - by WilliamLou

  If I have a huge table with ng-grid, and I enabled a checkbox to select all. Is there a way for me to combine this selectAll feature with the filtering box. I mean when I filter out the rows, I want to click the checkbox so that the rows filtered will be all selected; once I clean out filter, those selectedRows are still left so that I can add more rows into it with other filters. I created a Plunker code template here. copy code here as well: // main.js var app = angular.module('myApp', ['ngGrid']); app.controller('MyCtrl', function($scope) { $scope.mySelections = []; $scope.myData = [{name: "Moroni", age: 50}, {name: "Tiancum", age: 43}, {name: "Jacob", age: 27}, {name: "Nephi", age: 29}, {name: "Enos", age: 34}, {name: "Moroni", age: 50}, {name: "Tiancum", age: 43}, {name: "Jacob", age: 27}, {name: "Nephi", age: 29}, {name: "Enos", age: 34}, {name: "Moroni", age: 50}, {name: "Tiancum", age: 43}, {name: "Jacob", age: 27}, {name: "Nephi", age: 29}, {name: "Enos", age: 34}, {name: "Moroni", age: 50}, {name: "Tiancum", age: 43}, {name: "Jacob", age: 27}, {name: "Nephi", age: 29}, {name: "Enos", age: 34},]; $scope.filterOptions = { filterText: '' }; $scope.gridOptions = { data: 'myData', checkboxHeaderTemplate: '<input class="ngSelectionHeader" type="checkbox" ng-model="allSelected" ng-change="toggleSelectAll(allSelected)"/>', showSelectionCheckbox: true, selectWithCheckboxOnly: false, selectedItems: $scope.mySelections, multiSelect: true, filterOptions: $scope.filterOptions }; });

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