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• Rails Counter Cache and its implementation

  - by Ishu

  Hello All, I am trying to get hold of rails counter cache feature but not able to grasp it completely. Let's say that We have 3 models A B C A belongs to B or C depending upon a field key_type and key_id. key_type tells whether A belongs to B or C so if key_type="B" then the record belongs to B otherwise it belongs to C. In my model a.rb, I have defined following associations: belongs_to :b, :counter_cache => true, :foreign_key => "key_id" belongs_to :c, :counter_cache => true, :foreign_key => "key_id" and in b and c model files has_many :as , :conditions => {:key_type => "B"} has_many :as , :conditions => {:key_type => "C"} Both B and C Models have a column as as_count The problem is every time an object of a is created count is increased in the both the models b and c. Any help is appreciated. Initially i thought that this may work: belongs_to :b, :counter_cache => true, :foreign_key => "key_id", :conditions => {:key_type => "B"} belongs_to :c, :counter_cache => true, :foreign_key => "key_id", :conditions => {:key_type => "C"} But this does not help. Thanks

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• Getting Attributes of Keychain Items

  - by rgov

  I'm trying to get the attributes of a keychain item. This code should look up all the available attributes, then print off their tags and contents. According to the docs I should be seeing tags like 'cdat', but instead they just look like an index (i.e., the first tag is 0, next is 1). This makes it pretty useless since I can't tell which attribute is the one I'm looking for. SecItemClass itemClass; SecKeychainItemCopyAttributesAndData(itemRef, NULL, &itemClass, NULL, NULL, NULL); SecKeychainRef keychainRef; SecKeychainItemCopyKeychain(itemRef, &keychainRef); SecKeychainAttributeInfo *attrInfo; SecKeychainAttributeInfoForItemID(keychainRef, itemClass, &attrInfo); SecKeychainAttributeList *attributes; SecKeychainItemCopyAttributesAndData(itemRef, attrInfo, NULL, &attributes, 0, NULL); for (int i = 0; i < attributes->count; i ++) { SecKeychainAttribute attr = attributes->attr[i]; NSLog(@"%08x %@", attr.tag, [NSData dataWithBytes:attr.data length:attr.length]); } SecKeychainFreeAttributeInfo(attrInfo); SecKeychainItemFreeAttributesAndData(attributes, NULL); CFRelease(itemRef); CFRelease(keychainRef);

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• How do you write Valid XHTML 1.0 Strict code when you are using javascript to fill an element that r

  - by Tim Visher

  I'm running my site through the W3C's validator trying to get it to validate as XHTML 1.0 Strict and I've gotten down to a particularly sticky (at least in my experience) validation error. I'm including certain badges from various services in the site that provide their own API and code for inclusion on an external site. These badges use javascript (for the most part) to fill an element that you insert in the markup which requires a child. This means that in the end, perfectly valid markup is generated, but to the validator, all it sees is an incomplete parent-child tag which it then throws an error on. As a caveat, I understand that I could complain to the services that their badges don't validate. Sans this, I assume that someone has validated their code while including badges like this, and that's what I'm interested in. Answers such as, 'Complain to Flickr about their badge' aren't going to help me much. An additional caveat: I would prefer that as much as possible the markup remains semantic. I.E. Adding an empty li tag or tr-td pair to make it validate would be an undesirable solution, even though it may be necessary. If that's the only way it can be made to validate, oh well, but please lean answers towards semantic markup. As an example: <div id="twitter_div"> <h2><a href="http://twitter.com/stopsineman">@Twitter</a></h2> <ul id="twitter_update_list"> <script type="text/javascript" src="http://twitter.com/javascripts/blogger.js"></script> <script type="text/javascript" src="http://twitter.com/statuses/user_timeline/stopsineman.json?callback=twitterCallback2&amp;count=1"></script> </ul> </div> Notice the ul tags wrapping the javascript. This eventually gets filled in with lis via the script, but to the validator it only sees the unpopulated ul. Thanks in advance!

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• Issue with VS 2008 designer and usercontrol.

  - by Ram

  Hello, I have created a custom data grid control. I dragged it on windows form and set its properties like column and all & ran the project. It built successfully and I am able to view the grid control on the form. Now if i try to view that form in designer, I am getting following error.. Object reference not set to an instance of an object. Instances of this error (1) 1. Hide Call Stack at Microsoft.VisualStudio.Design.Serialization.CodeDom.XML.CodeDomXmlProcessor.GetMemberTargetObject(XmlElementData xmlElementData, String& member) at Microsoft.VisualStudio.Design.Serialization.CodeDom.XML.CodeDomXmlProcessor.CreateAssignStatement(XmlElementData xmlElement) at Microsoft.VisualStudio.Design.Serialization.CodeDom.XML.CodeDomXmlProcessor.XmlElementData.get_CodeDomElement() at Microsoft.VisualStudio.Design.Serialization.CodeDom.XML.CodeDomXmlProcessor.EndElement(String prefix, String name, String urn) at Microsoft.VisualStudio.Design.Serialization.CodeDom.XML.CodeDomXmlProcessor.Parse(XmlReader reader) at Microsoft.VisualStudio.Design.Serialization.CodeDom.XML.CodeDomXmlProcessor.ParseXml(String xmlStream, CodeStatementCollection statementCollection, String fileName, String methodName) at Microsoft.VisualStudio.Design.Serialization.CodeDom.VSCodeDomParser.OnMethodPopulateStatements(Object sender, EventArgs e) at System.CodeDom.CodeMemberMethod.get_Statements() at System.ComponentModel.Design.Serialization.TypeCodeDomSerializer.Deserialize(IDesignerSerializationManager manager, CodeTypeDeclaration declaration) at System.ComponentModel.Design.Serialization.CodeDomDesignerLoader.PerformLoad(IDesignerSerializationManager manager) at Microsoft.VisualStudio.Design.Serialization.CodeDom.VSCodeDomDesignerLoader.PerformLoad(IDesignerSerializationManager serializationManager) at Microsoft.VisualStudio.Design.Serialization.CodeDom.VSCodeDomDesignerLoader.DeferredLoadHandler.Microsoft.VisualStudio.TextManager.Interop.IVsTextBufferDataEvents.OnLoadCompleted(Int32 fReload) If I ignore the exception, form appears blank with no sign of grid control on it. However I can see the code for the grid in the designer file. Any pointer on this would be a great help.

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• How to use NInject (or other DI / IoC container) with the model binder in ASP.NET MVC 2 ?

  - by Andrei Rinea

  Let's say I have an User entity and I would want to set it's CreationTime property in the constructor to DateTime.Now. But being a unit test adopter I don't want to access DateTime.Now directly but use an ITimeProvider : public class User { public User(ITimeProvider timeProvider) { // ... this.CreationTime = timeProvider.Now; } // ..... } public interface ITimeProvider { public DateTime Now { get; } } public class TimeProvider : ITimeProvider { public DateTime Now { get { return DateTime.Now; } } } I am using NInject 2 in my ASP.NET MVC 2.0 application. I have a UserController and two Create methods (one for GET and one for POST). The one for GET is straight forward but the one for POST is not so straight and not so forward :P because I need to mess with the model binder to tell it to get a reference of an implementation of ITimeProvider in order to be able to construct an user instance. public class UserController : Controller { [HttpGet] public ViewResult Create() { return View(); } [HttpPost] public ActionResult Create(User user) { // ... } } I would also like to be able to keep all the features of the default model binder. Any chance to solve this simple/elegant/etc? :D

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• Help needed implementing a web based file management system with a file hierarchy system, help neede

  - by molleman

  Hello i am trying to create a web application that will allow users to upload files online, i am using gwt while using hibernate for database communication, i am able to upload file to a server , and store them on the server. but what i want is to associate the files with a user. i want the user to be able to create folders and store a file in sub folders. my logic was to use the composite pattern to store folders and fileLocations with a user but i am am finding it difficult to implement this so i can show the files and folders within a gwt tree. what would be the best way to implement a hierarchy of folders and information of the location of a file so it could be displayed in a gwt tree? what i did have was a User would hold a reference to a root folder and then each sub folder could hold folders or fileLocations. i used the composite pattern to implement the file hierarchy, but when i want to display a the contents of a folder i need a for loop for each list. so i could a folder within a folder within a folder that would need 3 for loops to show the contents of my folders. What is the best way to implement this file management system. so what do you guys think?

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• How to dispose a Writeable Bitmap? (WPF)

  - by Mario

  Some time ago i posted a question related to a WriteableBitmap memory leak, and though I received wonderful tips related to the problem, I still think there is a serious bug / (mistake made by me) / (Confusion) / (some other thing) here. So, here is my problem again: Suppose we have a WPF application with an Image and a button. The image's source is a really big bitmap (3600 * 4800 px), when it's shown at runtime the applicaton consumes ~90 MB. Now suppose i wish to instantiate a WriteableBitmap from the source of the image (the really big Image), when this happens the applications consumes ~220 MB. Now comes the tricky part, when the modifications to the image (through the WriteableBitmap) end, and all the references to the WriteableBitmap (at least those that I'm aware of) are destroyed (at the end of a method or by setting them to null) the memory used by the writeableBitmap should be freed and the application consumption should return to ~90 MB. The problem is that sometimes it returns, sometimes it does not. Here is a sample code: // The Image's source whas set previous to this event private void buttonTest_Click(object sender, RoutedEventArgs e) { if (image.Source != null) { WriteableBitmap bitmap = new WriteableBitmap((BitmapSource)image.Source); bitmap.Lock(); bitmap.Unlock(); //image.Source = null; bitmap = null; } } As you can see the reference is local and the memory should be released at the end of the method (Or when the Garbage collector decides to do so). However, the app could consume ~224 MB until the end of the universe. Any help would be great.

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• error: unable to open database file, SQLiteException was unhandled

  - by rose

  My project has a reference to SQLite.Interop.066.dll and even after putting in the correct path to the SQLite database, the application is still unable to find it. A SQLiteException was unhandled is returned. SQLiteConnection conn = new SQLiteConnection(); //SQLiteDataAdapter da; SQLiteCommandBuilder cb; DataTable dt=new DataTable(); int row = 0; conn.ConnectionString = "Data Source=C:\\database\\info"; conn.Open(); DataRow dr = dt.NewRow(); dr["name"] = txtName.Text; dr["address"] = txtAddress.Text; dr["phone"] = txtPhone.Text; dr["position"] = txtPosition.Text; dt.Rows.Add(dr); da.Update(dt); row = dt.Rows.Count - 1; txtName.Text = dt.Rows[row]["name"].ToString(); txtAddress.Text = dt.Rows[row]["address"].ToString(); txtPhone.Text = dt.Rows[row]["phone"].ToString(); txtPosition.Text = dt.Rows[row]["position"].ToString(); da.Fill(dt); cb = new SQLiteCommandBuilder(da); conn.Dispose(); conn.Close(); The exception occur at line: conn.Open(); sorry for the mistake title error before...

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• jQuery datepicker returns "inst is null" error when loaded via AJAX

  - by Robert

  I'm loading content via an AJAX call into a table row added to the DOM on the fly. I'm calling the datepicker functionality in my callback function and the calendar shows fine. However, when I click on the date, I get an error: inst is null. Here's my code: $(document).ready(function() { $(".edit").live("click", function() { //Delete previously loaded edit row $("#tempEditRow").remove(); //Get the record id of the row to be edited var recordID = $(this).parent("td").parent("tr").attr("id"); //Add the new row to the document $(this).parent("td").parent("tr").after("<tr id=\"tempEditRow\"><td id=\"tempEditCell\" colspan=\"100\"></td></tr>") //Get a reference to the new row var container = $("#tempEditCell"); //Populate the container populateContainer("/wpm/includes/ajax_editApplication.cfm?id=" + recordID, container); }); }); function populateContainer(ajaxUrl, container) { //Populate the container $.ajax({ url: ajaxUrl, cache: false, success: function(html){ $(container).html(html); $('.datepicker').datepicker(); } }); } I've tried deleting the hasDatepicker class, deleting any references to the datepicker, etc. but nothing is working. Thanks in advance for helping!

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• Save HTML to Pdf ABCPdf 4

  - by daisy

  Hello All, I'm using following code to save html to pdf file. But it fails to compile at if (!theDoc.Chainable(theID)). I do have using WebSupergoo.ABCpdf4; added at the begining of the code. Is this version issue? Is there any other method to save HTML string to pdf file in ABCPdf 4. Error Message is "'WebSupergoo.ABCpdf4.Doc' does not contain a definition for 'Chainable' and no extension method 'Chainable' accepting a first argument of type 'WebSupergoo.ABCpdf4.Doc' could be found (are you missing a using directive or an assembly reference?) Doc theDoc = new Doc(); theDoc.Rect.Inset(10, 50); theDoc.Page = theDoc.AddPage(); int theID; theID = theDoc.AddImageHtml(str); while (true) { if (!theDoc.Chainable(theID)) break; theDoc.Page = theDoc.AddPage(); theID = theDoc.AddImageToChain(theID); } for (int i = 1; i <= theDoc.PageCount; i++) { theDoc.PageNumber = i; theDoc.Flatten(); } theDoc.Save("path where u want 2 save" + ".pdf"); theDoc.Clear(); All the help is appreciated.

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• signalR groups - connecting/disconnecting and sending - am I missing something?

  - by Terry_Brown

  very new to signalR, and have rolled up a very simple app that will take questions for moderation at conferences (felt like a straight forward use case) I have 2 hubs at the moment: - Question (for asking questions) - Speaker (these should receive questions and allow moderation, but that will come later) Solution lives at https://github.com/terrybrown/InterASK After watching a video (by David Fowler/Damian Edwards) (http://channel9.msdn.com/Shows/Web+Camps+TV/Damian-Edwards-and-David-Fowler-Demonstrate-SignalR) and another that I can't find the URL for atm, I thought I'd go with 'groups' as the concept to keep messages flowing to the right people. I implemented IConnected, IDisconnect as I'd seen in one of the videos, and upon debugging I can see Connect fire (and on reload I can see disconnect fire), but it seems nothing I do adds a person to a group. The signalR documentation suggests "Groups are not persisted on the server so applications are responsible for keeping track of what connections are in what groups so things like group count can be achieved" which I guess is telling me that I need to keep some method (static or otherwise?) of tracking who is in a group? Certainly I don't seem able to send to groups currently, though I have no problem distributing to anyone currently connected to the app and implementing the same JS method (2 machines on the same page). I suspect I'm just missing something - I read a few of the other questions on here, but none of them seem to mention IConnected/IDisconnect, which tells me these are either new (and nobody is using them) or that they're old (and nobody is using them). I know this could be considered a subjective question, though what I'm looking for is just a simple means of managing the groups so that I can do what I want to - send a question from one hub, and have people connected to a different hub receive it - groups felt the cleanest solution for this? Many thanks folks. Terry

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• UIPageControl in a ITableViewCell gets shoved to the top left corner

  - by Danny Tuppeny

  I'm trying to put a UIPageControl inside a cell (there's nothing else in the cell), but I have two problems: The dots are aligned at the top-left of the cell, so you only see the bottom-right quarter of the first dot, and the bottom half of the other dots (like the first dots center is 0, 0). Unless you tab the cell to select it (goes blue), you can't see the dots at all. Other controls I've put into a cell have filled the whole area as wanted. How do I tell the UIPageControl to fill the whole cell (and align in the middle) How do I change the colours so the dots can be seen? I tried calling [pageControl setBackgroundColor] but it didn't seem to do anything. Here's the code I'm using: // Create a page control UIPageControl *pageControl = [[[UIPageControl alloc] init] autorelease]; // Set the number of pages to match the images [pageControl setNumberOfPages:[imageFilenames count]]; [pageControl setCurrentPage:1]; // Create the cell and add the paging control UITableViewCell *cell = [self getCell:tableView withIdentifier:@"ImagePager"]; [cell addSubview:pageControl]; //[[cell textLabel] setText:@"ADD PAGING CONTROL"]; return cell;

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• How did the Lunar Lander example make the image backgrounds transparent?

  - by user279112

  Hello. I'm trying to make a GUI program with the Android SDK, using their Lunar Lander example as a significant self-teaching tool in the process. I've noticed their sprites' images' backgrounds, which were at least usually pure white, did not show up in their program. I want to ask how they did that, since their site doesn't explain simple things very well. I've managed to pull that off before on another GUI SDK, wherein all I had to do was to call a function and pass it a few floats to define a certain color, and until my code told it to do otherwise, that function would make sure that that particular color in my sprites' images was totally transparent. However I've wrestled with the Lunar Lander example and getting my own program to show some custom graphics for a week or two now, and I haven't noticed any such function call in the Lunar Lander example. I tried to look for it, but I did not find anything. I've tried to Google some tutorial or other reference material, but what I've found so far is just straying off into unrelated areas and totally dodging this EXTREMELY important lesson on the SDK's basics. Any ideas? Thanks!

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• .NET SAP Connection Authentication via WEB Service

  - by mehmet6parmak

  Hi, I am trying to connect to a web service served by SAP and i have authentication problem. I simply added the service by right clicking project, selecting add service reference, giving WSDL url for the service and clicking OK.(After clicking ok asked for credentials and i provided them) Then when i tried to call a method from the serviceclien object i got the error message below: The HTTP request is unauthorized with client authentication scheme 'Anonymous'. The authentication header received from the server was 'Basic realm="SAP Web Application Server <hostname>"'. Web Config Related Part: <basicHttpBinding> <binding name="binding" closeTimeout="00:01:00" openTimeout="00:01:00" receiveTimeout="00:10:00" sendTimeout="00:01:00" allowCookies="false" bypassProxyOnLocal="false" hostNameComparisonMode="StrongWildcard" maxBufferSize="65536" maxBufferPoolSize="524288" maxReceivedMessageSize="65536" messageEncoding="Text" textEncoding="utf-8" transferMode="Buffered" useDefaultWebProxy="true"> <readerQuotas maxDepth="32" maxStringContentLength="8192" maxArrayLength="16384" maxBytesPerRead="4096" maxNameTableCharCount="16384" /> <security mode="None"> <transport clientCredentialType="None" proxyCredentialType="None" realm=""> <extendedProtectionPolicy policyEnforcement="Never" /> </transport> <message clientCredentialType="UserName" algorithmSuite="Default" /> </security> </binding> Also, What problems will i face with? I do not want to use SAP .NET Connector. Thanks...

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• Scrolling a Canvas smoothly in Android

  - by prepbgg

  I'm new to Android. I am drawing bitmaps, lines and shapes onto a Canvas inside the OnDraw(Canvas canvas) method of my view. I am looking for help on how to implement smooth scrolling in response to a drag by the user. I have searched but not found any tutorials to help me with this. The reference for Canvas seems to say that if a Canvas is constructed from a Bitmap (called bmpBuffer, say) then anything drawn on the Canvas is also drawn on bmpBuffer. Would it be possible to use bmpBuffer to implement a scroll ... perhaps copy it back to the Canvas shifted by a few pixels at a time? But if I use Canvas.drawBitmap to draw bmpBuffer back to Canvas shifted by a few pixels, won't bmpBuffer be corrupted? Perhaps, therefore, I should copy bmpBuffer to bmpBuffer2 then draw bmpBuffer2 back to the Canvas. A more straightforward approach would be to draw the lines, shapes, etc. straight into a buffer Bitmap then draw that buffer (with a shift) onto the Canvas but so far as I can see the various methods: drawLine(), drawShape() and so on are not available for drawing to a Bitmap ... only to a Canvas. Could I have 2 Canvases? One of which would be constructed from the buffer bitmap and used simply for plotting the lines, shapes, etc. and then the buffer bitmap would be drawn onto the other Canvas for display in the View? I should welcome any advice! Answers to similar questions here (and on other websites) refer to "blitting". I understand the concept but can't find anything about "blit" or "bitblt" in the Android documentation. Are Canvas.drawBitmap and Bitmap.Copy Android's equivalents?

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• How to reproduce System.Security.Cryptography.SHA1Managed result in Python

  - by joetyson

  Here's the deal: I'm moving a .NET website to Python. I have a database with passwords hashed using the System.Security.Cryptography.SHA1Managed utility. I'm creating the hash in .NET with the following code: string hashedPassword = Cryptographer.CreateHash("MYHasher", userInfo.Password); The MYHasher block looks like this: <add algorithmType="System.Security.Cryptography.SHA1Managed, mscorlib, Version=2.0.0.0, Culture=neutral, PublicKeyToken=blahblahblah" saltEnabled="true" type="Microsoft.Practices.EnterpriseLibrary.Security.Cryptography.HashAlgorithmProvider, Microsoft.Practices.EnterpriseLibrary.Security.Cryptography, Version=3.0.0.0, Culture=neutral, PublicKeyToken=daahblahdahdah" name="MYHasher" /> So for a given password, I get back and store in the database a 48 byte salted sha1. I assume the last 8 bytes are the salt. I have tried to reproduce the hashing process in python by doing a sha1(salt + password) and sha1(password + salt) but I'm having no luck. My question to you: How are the public keys being used? How is the password rehashed using the salt. How is the salt created? (e.g., When I say saltEnabled="true", what extra magic happens?) I need specific details that don't just reference other .NET libraries, I'm looking for the actual operational logic that happens in the blackbox. Thanks!

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• Customizing doxygen output for the HTML Table of Contents

  - by ILR

  I'm using doxygen to generate an API reference from source code, aiming to convert it into a CHM help file and eventually into a plugin for Eclipse. Unfortunately the default ordering and nesting of the classes, namespaces, etc. in the Table of Contents is not exactly ideal and I'd prefer to customize it if possible. By default, doxygen creates two indexes/menus for navigating the generated documentation. One is the common Table of Contents on the left frame and the other is the row of buttons at the top of each individual HTML page. The latter can be comfortably customized by editing the layout xml file as described in doxygen manual (see section 'Changing the layout of pages') but so far I've seen no way to do similar modifications for the Table of Contents. To use a precise example, I'm looking for a way to nest the three standard topics Class List, Class Hierarchy, and Class Members as subtopics inside a parent topic in the TOC, as is done by default in the menu system that's located on top of every page. I'd imagine this is not the most unusual issue and may have a known solution available. Thanks for your assistance!

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• How to access Actionscript from Javascript in Adobe AIR

  - by David Robinson

  I have an AIR application written in html/javascript and I want to use the Actionscript print functions but I have no experience in Actionscript for AIR. Where do I put the Actionscript code ? Does it go into an mxml file or does it need to be compiled into a Flash application. Where do I put it and how do I include it into the html document ? Finally, how do I call the AS function from Javascript ? =====update===== I know I have to compile either an .mxml or .as file into .swf using mxmlc and I have the following in my .as file: package { import mx.controls.Alert; public class HelloWorld { public function HelloWorld():void { trace("Hello, world!"); } } } Or alternately, this in a .mxml file: <mx:Application xmlns:mx="http://www.adobe.com/2006/mxml"> <mx:Script> <![CDATA[ import mx.controls.Alert; public function HelloWorld():void { Alert.show("hello world!"); trace("Hello, world!"); } ]]> </mx:Script> </mx:Application> This compiles OK, but when I include it in a html file with: <script src="actionscript.swf" type="application/x-shockwave-flash"></script> I get the following error: TypeError: Error #1009: Cannot access a property or method of a null object reference. at mx.managers::FocusManager/activate() at mx.managers::SystemManager/activateForm() at mx.managers::SystemManager/activate() at mx.core::Application/initManagers() at mx.core::Application/initialize() at actionscript/initialize() at mx.managers::SystemManager/http://www.adobe.com/2006/flex/mx/internal::childAdded() at mx.managers::SystemManager/initializeTopLevelWindow() at mx.managers::SystemManager/http://www.adobe.com/2006/flex/mx/internal::docFrameHandler() at mx.managers::SystemManager/docFrameListener() Any ideas what that means ?

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• CreateProcess doesn't pass command line arguments

  - by mnh

  Hello I have the following code but it isn't working as expected, can't figure out what the problem is. Basically, I'm executing a process (a .NET process) and passing it command line arguments, it is executed successfully by CreateProcess() but CreateProcess() isn't passing the command line arguments What am I doing wrong here?? int main(int argc, char* argv[]) { PROCESS_INFORMATION ProcessInfo; //This is what we get as an [out] parameter STARTUPINFO StartupInfo; //This is an [in] parameter ZeroMemory(&StartupInfo, sizeof(StartupInfo)); StartupInfo.cb = sizeof StartupInfo ; //Only compulsory field LPTSTR cmdArgs = "[email protected]"; if(CreateProcess("D:\\email\\smtp.exe", cmdArgs, NULL,NULL,FALSE,0,NULL, NULL,&StartupInfo,&ProcessInfo)) { WaitForSingleObject(ProcessInfo.hProcess,INFINITE); CloseHandle(ProcessInfo.hThread); CloseHandle(ProcessInfo.hProcess); printf("Yohoo!"); } else { printf("The process could not be started..."); } return 0; } EDIT: Hey one more thing, if I pass my cmdArgs like this: // a space as the first character LPTSTR cmdArgs = " [email protected]"; Then I get the error, then CreateProcess returns TRUE but my target process isn't executed. Object reference not set to an instance of an object

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• Measuring text with sizeWithFont returns height one line too short

  - by Mac

  In an iPhone app I'm working on, I'm trying to get a UILabel to dynamically adjust its size based on its content. To do so, I'm using NSString's sizeWithFont:constrainedToSize method to measure the height of the text when constrained to a given width, and then set the UILabel to that width and the returned height. The problem however, is that roughly half the time sizeWithFont is returning a height for the text that is one line too short. This happens mostly with long strings (a couple of hundred characters), but also very occasionally with shorter strings (less than one hundred). For reference, my code looks like the following (textLabel is the UILabel in question and is a member variable, TEXT_WIDTH is the desired label width): - (void) setLabelText:(NSString*) text { CGSize bounds = CGSizeMake(TEXT_WIDTH, CGFLOAT_MAX); int textHeight = [text sizeWithFont:textLabel constrainedToSize:bounds lineBreakMode:UILineBreakModeWordWrap].height; CGRect newFrame = CGRectMake(0, 0, TEXT_WIDTH, textHeight); [textLabel setFrame:newFrame]; } Just to be clear, I don't believe the issue is with the UILabel, as I've manually inspected the value being returned by sizeWithFont and can confirm that the number being returned for the height is too small on the occasions when the label is also too small.

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• Force-directed graphing

  - by David

  Hello, I'm trying to write a force-directed or force-atlas code base for a graphing application I'm building for myself. Here is an example of what I'm attempting: http://sawamuland.com/flash/graph.html I managed to find some pseudo code to accomplish what I'd like on the Wiki Force-atlas article. I've converted this into ActionScript 3.0 code since it's a Flash application. Here is my source: var timestep:int = 0; var damping:int = 0; var total_kinetic_engery:int = 0; for (var node in list) { var net_force:int = 0; for (var other_node in list) { net_force += coulombRepulsion(node, other_node, nodeList); } for (var spring in list[node].relations) { net_force += hookeAttraction(node, spring, nodeList); } list[node].velocity += (timestep * net_force) * damping; list[node].position += timestep * list[node].velocity; total_kinetic_engery += list[node].mass * (list[node].velocity) ^ 2; } The problem now is finding pseudo code or a function to perform the the coulomb repulsion and hooke attraction code. I'm not exactly sure how to accomplish this. Does anyone know of a good reference I can look at...understand and implement quickly? Best.

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• How to apply stereotypes on UML Relationships' MemberEnds?

  - by Cristi Potlog

  I'm running this code on a UML Class Diagram, and it works just fine, but when trying to apply stereotypes from PropertiesEditor in Visual Studio for relationship ends (FirstRole and SecondRole), the stereotypes combo doesn't load even if in code there seems to be applicable stereotypes valid for association properties. What should I put in metaclasses tag in the UML profile except for IProperty? <metaclassMoniker name="/MyUmlProfile/Microsoft.VisualStudio.Uml.Classes.IProperty"/> This is the code: using Microsoft.VisualStudio.Uml.Classes; foreach( IShape shape in currentDiagram.GetSelectedShapes<IElement>() ) { IElement element = shape.GetElement(); foreach( IStereotype stereotype in element.ApplicableStereotypes ) { if( element is Microsoft.VisualStudio.Uml.Classes.IClass ) { IClass classItem = (IClass)element; if( classItem.SuperClasses.Count() > 0 ) { if( stereotype.Name == "SubclassAttribute" ) { element.ApplyStereotype( stereotype ); } } else if( stereotype.Name == "ClassAttribute" ) { element.ApplyStereotype( stereotype ); } } else if( element is Microsoft.VisualStudio.Uml.Classes.IProperty ) { IProperty property = (IProperty)element; if( property.Association != null ) { if( stereotype.Name == "Set" && property.UpperValue != null && property.UpperValue.ToString() == "*" ) { element.ApplyStereotype( stereotype ); } else if( stereotype.Name == "ManyToOne" && ( property.UpperValue == null || property.UpperValue.ToString() == "1" ) ) { element.ApplyStereotype( stereotype ); } } else if( stereotype.Name == "Property" ) { element.ApplyStereotype( stereotype ); } } } }

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• MySql query optimization help

  - by rohitgu

  I have few queries and am not able to figure out how to optimize them, QUERY 1 select * from t_twitter_tracking where classified is null and tweetType='ENGLISH' order by id limit 500; QUERY 2 Select count(*) as cnt, DATE_FORMAT(CONVERT_TZ(wrdTrk.createdOnGMTDate,'+00:00','+05:30'),'%Y-%m-%d') as dat from t_twitter_tracking wrdTrk where wrdTrk.word like ('dell') and CONVERT_TZ(wrdTrk.createdOnGMTDate,'+00:00','+05:30') between '2010-12-12 00:00:00' and '2010-12-26 00:00:00' group by dat; Both these queries run on the same table, CREATE TABLE `t_twitter_tracking` ( `id` BIGINT(20) NOT NULL AUTO_INCREMENT, `word` VARCHAR(200) NOT NULL, `tweetId` BIGINT(100) NOT NULL, `twtText` VARCHAR(800) NULL DEFAULT NULL, `language` TEXT NULL, `links` TEXT NULL, `tweetType` VARCHAR(20) NULL DEFAULT NULL, `source` TEXT NULL, `sourceStripped` TEXT NULL, `isTruncated` VARCHAR(40) NULL DEFAULT NULL, `inReplyToStatusId` BIGINT(30) NULL DEFAULT NULL, `inReplyToUserId` INT(11) NULL DEFAULT NULL, `rtUsrProfilePicUrl` TEXT NULL, `isFavorited` VARCHAR(40) NULL DEFAULT NULL, `inReplyToScreenName` VARCHAR(40) NULL DEFAULT NULL, `latitude` BIGINT(100) NOT NULL, `longitude` BIGINT(100) NOT NULL, `retweetedStatus` VARCHAR(40) NULL DEFAULT NULL, `statusInReplyToStatusId` BIGINT(100) NOT NULL, `statusInReplyToUserId` BIGINT(100) NOT NULL, `statusFavorited` VARCHAR(40) NULL DEFAULT NULL, `statusInReplyToScreenName` TEXT NULL, `screenName` TEXT NULL, `profilePicUrl` TEXT NULL, `twitterId` BIGINT(100) NOT NULL, `name` TEXT NULL, `location` VARCHAR(100) NULL DEFAULT NULL, `bio` TEXT NULL, `url` TEXT NULL COLLATE 'latin1_swedish_ci', `utcOffset` INT(11) NULL DEFAULT NULL, `timeZone` VARCHAR(100) NULL DEFAULT NULL, `frenCnt` BIGINT(20) NULL DEFAULT '0', `createdAt` DATETIME NULL DEFAULT NULL, `createdOnGMT` VARCHAR(40) NULL DEFAULT NULL, `createdOnServerTime` DATETIME NULL DEFAULT NULL, `follCnt` BIGINT(20) NULL DEFAULT '0', `favCnt` BIGINT(20) NULL DEFAULT '0', `totStatusCnt` BIGINT(20) NULL DEFAULT NULL, `usrCrtDate` VARCHAR(200) NULL DEFAULT NULL, `humanSentiment` VARCHAR(30) NULL DEFAULT NULL, `replied` BIT(1) NULL DEFAULT NULL, `replyMsg` TEXT NULL, `classified` INT(32) NULL DEFAULT NULL, `createdOnGMTDate` DATETIME NULL DEFAULT NULL, `locationDetail` TEXT NULL, `geonameid` INT(11) NULL DEFAULT NULL, `country` VARCHAR(255) NULL DEFAULT NULL, `continent` CHAR(2) NULL DEFAULT NULL, `placeLongitude` FLOAT NULL DEFAULT NULL, `placeLatitude` FLOAT NULL DEFAULT NULL, PRIMARY KEY (`id`), INDEX `id` (`id`, `word`), INDEX `createdOnGMT_index` (`createdOnGMT`) USING BTREE, INDEX `word_index` (`word`) USING BTREE, INDEX `location_index` (`location`) USING BTREE, INDEX `classified_index` (`classified`) USING BTREE, INDEX `tweetType_index` (`tweetType`) USING BTREE, INDEX `getunclassified_index` (`classified`, `tweetType`) USING BTREE, INDEX `timeline_index` (`word`, `createdOnGMTDate`, `classified`) USING BTREE, INDEX `createdOnGMTDate_index` (`createdOnGMTDate`) USING BTREE, INDEX `locdetail_index` (`country`, `id`) USING BTREE, FULLTEXT INDEX `twtText_index` (`twtText`) ) COLLATE='utf8_general_ci' ENGINE=MyISAM ROW_FORMAT=DEFAULT AUTO_INCREMENT=12608048; The table has more than 10 million records. How can I optimize it?

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• flushing database cache in SWI-Prolog

  - by JPro

  We are using swi-prolog to run our testcases. Whenever the test starts, I am opening the connection to MYSQL database and storing the Name of the Test hat is being done and then closing the DB. These tests run for about 2 days continuously. After the tests are done, the results basically gets stored in folder in the server. There is a predicate in another prolog file that is called to update the results to the MYSQL database. The code is simple, I use odbc library and just call odbc_* predicates to connect and update the mysql by issuing direct queries. The actual problem is : If I try to call the Predicate from the same Prolog window, where the test just got completed, I get an error as updating to the DB server. Although I do not get any error in the connection. If I close the session of that prolog with halt and closing all the open prolog windows , then open an other complete new instance of Prolog and run the predicate the update goes well. I have a feeling that there is some connection reference to the MySQL DB in Prolog database. Is there any way to clear the database in prolog so that I can run the same predicate without closing any existing prolog windows? Any ideas appreciated. Thanks.

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• Sphinx PHP search

  - by James

  I'm doing a Sphinx search but turning up some really weird results. Any help is appreciated. So for example if I type "50", I get: 50 Cent 50 Lions 50 Foot Wave, etc. This is great, but when I search "50 Ce", I get: Ryczace Dwudziestki Spisek Bernhard Gal Cowabunga Go-Go And other crazy results. Also when I search for "50 Cent", the correct result is at the top, but then random results below. Any ideas why? PHP code: $query = $_GET['query']; if (!empty($query)) { $sphinx->SetMatchMode(SPH_MATCH_ALL); $sphinx->AddQuery($query, 'artists'); $sphinx->AddQuery($query, 'variations'); $sphinx->SetFilter('name', array(3)); $sphinx->SetLimits(0, 10); $result = $sphinx->RunQueries(); echo '<pre>'; switch ($result) { case false: echo 'Query failed: ' . $sphinx->GetLastError() . "\n"; break; default: if ($sphinx->GetLastWarning()) { echo 'WARNING: ' . $sphinx->GetLastWarning() . "\n"; } if (is_array($result[0]['matches']) && count($result[0]['matches'])) { foreach ($result[0]['matches'] as $value => $info) { $artist = artistDetails($value); echo $artist['name'] . "\n"; } } } } Sphinx Index and Source: source artists { type = mysql sql_host = localhost sql_user = user sql_pass = pass sql_db = db sql_port = 3300 sql_query = \ SELECT \ id, name \ FROM artists; #UNIX_TIMESTAMP(time) #sql_attr_uint = group_id #sql_attr_timestamp = time sql_query_info = SELECT id,name FROM artists WHERE id=$id } index artists { source = artists path = /var/sphinx/artists docinfo = extern charset_type = utf-8 }

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