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• NSDocument Subclass not closed by NSWindowController?

  - by Nathan Douglas

  Okay, I'm fairly new to Cocoa and Objective-C, and to OOP in general. As background, I'm working on an extensible editor that stores the user's documents in a package. This of course required some "fun" to get around some issues with NSFileWrapper (i.e. a somewhat sneaky writing and loading process to avoid making NSFileWrappers for every single document within the bundle). The solution I arrived at was to essentially treat my NSDocument subclass as just a shell -- use it to make the folder for the bundle, and then pass off writing the actual content of the document to other methods. Unfortunately, at some point I seem to have completely screwed the pooch. I don't know how this happened, but closing the document window no longer releases the document. The document object doesn't seem to receive a "close" message -- or any related messages -- even though the window closes successfully. The end result is that if I start my app, create a new document, save it, then close it, and try to reopen it, the document window never appears. With some creative subclassing and NSLogging, I managed to figure out that the document object was still in memory, and still attached to the NSDocumentController instance, and so trying to open the document never got past the NSDocumentController's "hmm, currently have that one open" check. I did have an NSWindowController and NSDocumentController instance, but I've purged them from my project completely. I've overridden nearly every method for NSDocument trying to find out where the issue is. So far as I know, my Interface Builder bindings are all correct -- "Close" in the main menu is attached to "performClose:" of the First Responder, etc, and I've tried with fresh unsullied MainMenu and Document xibs as well. I thought that it might be something strange with my bundle writing code, so I basically deleted it all and started from scratch, but that didn't seem to work. I took out my init method overrides, and that didn't help either. I don't have the source of any simple document apps here, so I didn't try the next logical step (to substitute known-working code for mine in the readfromurl and writetourl methods). I've had this problem for about sixteen hours of uninterrupted troubleshooting now, and needless to say, I'm at the end of my rope. If I can't figure it out, I guess I'm going to try the project from scratch with a lot more code and intensity based around the bundle-document mess. Any help would be greatly appreciated.

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• What is the best workaround for the WCF client `using` block issue?

  - by Eric King

  I like instantiating my WCF service clients within a using block as it's pretty much the standard way to use resources that implement IDisposable: using (var client = new SomeWCFServiceClient()) { //Do something with the client } But, as noted in this MSDN article, wrapping a WCF client in a using block could mask any errors that result in the client being left in a faulted state (like a timeout or communication problem). Long story short, when Dispose() is called, the client's Close() method fires, but throws and error because it's in a faulted state. The original exception is then masked by the second exception. Not good. The suggested workaround in the MSDN article is to completely avoid using a using block, and to instead instantiate your clients and use them something like this: try { ... client.Close(); } catch (CommunicationException e) { ... client.Abort(); } catch (TimeoutException e) { ... client.Abort(); } catch (Exception e) { ... client.Abort(); throw; } Compared to the using block, I think that's ugly. And a lot of code to write each time you need a client. Luckily, I found a few other workarounds, such as this one on IServiceOriented. You start with: public delegate void UseServiceDelegate<T>(T proxy); public static class Service<T> { public static ChannelFactory<T> _channelFactory = new ChannelFactory<T>(""); public static void Use(UseServiceDelegate<T> codeBlock) { IClientChannel proxy = (IClientChannel)_channelFactory.CreateChannel(); bool success = false; try { codeBlock((T)proxy); proxy.Close(); success = true; } finally { if (!success) { proxy.Abort(); } } } } Which then allows: Service<IOrderService>.Use(orderService => { orderService.PlaceOrder(request); } That's not bad, but I don't think it's as expressive and easily understandable as the using block. The workaround I'm currently trying to use I first read about on blog.davidbarret.net. Basically you override the client's Dispose() method wherever you use it. Something like: public partial class SomeWCFServiceClient : IDisposable { void IDisposable.Dispose() { if (this.State == CommunicationState.Faulted) { this.Abort(); } else { this.Close(); } } } This appears to be able to allow the using block again without the danger of masking a faulted state exception. So, are there any other gotchas I have to look out for using these workarounds? Has anybody come up with anything better?

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• Sending Bulk Emails using PHP

  - by Rose

  Hi All I have to send mails to all users in the site when a new user joins. My problem is the script stops execution after sending around 400 mails. I have set the set_time_limit to 0. And also I am giving sleep(2) after sending 10 mails. What may be the reason behind this issue.Any solution for this problem . Is there any better method to send bulk emails? Thanks in Advance Rose

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• ASP.NET MVC Login ReturnUrl always NULL?

  - by aherrick

  Using Forms Authentication in ASP.NET MVC when trying to log back into a site, it puts a ReturnUrl parameter in the query string. My Logon action method accepts a "returnUrl" string. However it seems that returnUrl string is always null, even when it is clearly in the query string. Any thoughts on why this might be the case or a possible fix?

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• TypeError #1009, XML and AS3

  - by VideoDnd

  My animation is advanced forward, but it's frozen. It throws a TypeError #1009. How do I get rid of this error and get it to play? ERROR TypeError: Error #1009: Cannot access a property or method of a null object reference. at _fla::MainTimeline/frame1() TypeError: Error #1009: Cannot access a property or method of a null object reference. at _fla::MainTimeline/incrementCounter() at flash.utils::Timer/_timerDispatch() at flash.utils::Timer/tick() download http://sandboxfun.weebly.com/ XML <?xml version="1.0" encoding="utf-8"?> <SESSION> <TIMER TITLE="speed">1000</TIMER> <COUNT TITLE="starting position">10000</COUNT> </SESSION> FLA //DynamicText 'Count' var timer:Timer = new Timer(10); var count:int = 0; var fcount:int = 0; timer.addEventListener(TimerEvent.TIMER, incrementCounter); timer.start(); function incrementCounter(event:TimerEvent) { count = myXML.COUNT.text(); count++; fcount=int(count*count/1000); mytext.text = formatCount(fcount); } function formatCount(i:int):String { var fraction:int = i % 100; var whole:int = i / 100; return ("0000000" + whole).substr(-7, 7) + "." + (fraction < 10 ? "0" + fraction : fraction); } //LOAD XML var myXML:XML; var myLoader:URLLoader = new URLLoader(); myLoader.load(new URLRequest("time.xml")); myLoader.addEventListener(Event.COMPLETE, processXML); /*------CHANGED TIMER VALUE WITH XML------*/ timer = new Timer( Number(myXML.TIMER.text()) ); //timer.start(); //PARSE XML function processXML(e:Event):void { myXML = new XML(e.target.data); trace(myXML.COUNT.text()); trace(myXML.TIMER.text()); } //var count:int = 0;//give it a value type /*------CHANGED COUNT VALUE WITH XML------*/ count = myXML.COUNT.text();

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• is there a preformance hit when using enum.values() vs. String arrays?

  - by Asaf

  i'm using enums to replace String constants in my java app (jre 1.5). is there a performance hit when i treat the enum as a static array of names, in a method that is called constatnly (e.g. when rendering the UI)? my code looks a bit like this: public String getValue(int col) { return ColumnValues.values()[col].toString(); } thanks, asaf :-)

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• updating rails to 2.3.6

  - by Nik

  can you update your 2.3.5 app with just "gem update rails" and change the version # in environment.rb? I did that and lots of errors came out like in console just typing Post.all would show "undefined method `retrieve_connection' for nil:NilClass". Any ideas? By the way, I have these gems in my environment.rb config.gem "aws-s3", :version = "= 0.6.2", :lib = "aws/s3" config.gem "less" config.gem "authlogic" config.gem "be9-acl9", :source = "http://gems.github.com", :lib = "acl9" config.gem "hash_extension" config.gem "prawn"

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• iPhone CGAffineTransformMakeRotation - symbols not found error

  - by pion

  I am calling CGAffineTransformMakeRotation method on iPhone SDK 3.1.3. Also, I have added CoreGraphics.framework. But I got "_CGAffineTransformMakeRotation symbols not found" error What did I do wrong? Thanks in advance for your help.

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• Debugging a GEF Eclipse plugin

  - by darkie15

  All, How can we debug a Eclipse plug-in based on GEF? Currently, I have a Activator class and custom editor from Example . Yet I am not able to find any output for the plugin. I tried using the "Launch Eclipse in Debug Mode" and setting a breakpoint in the Activator constructor method, but do not find any debugging activities taking place. Can anyone please guide on how to go about with debugging?

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• How to change the background of a text bloc in a text document in Qt

  - by yan bellavance

  is there a way to change the background color of a QTextBlock in a QTextDocument without using a subclass of QAbstractTextDocumentLayout. I have tried many ways and the effects are null. I am trying from the textCursor() method of a QPlainTextEditor and it seems practically everything is const.

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• NSTimer as a self-targeting ivar.

  - by Matt Wilding

  I have come across an awkward situation where I would like to have a class with an NSTimer instance variable that repeatedly calls a method of the class as long as the class is alive. For illustration purposes, it might look like this: // .h @interface MyClock : NSObject { NSTimer* _myTimer; } - (void)timerTick; @end - // .m @implementation MyClock - (id)init { self = [super init]; if (self) { _myTimer = [[NSTimer scheduledTimerWithTimeInterval:1.0f target:self selector:@selector(timerTick) userInfo:nil repeats:NO] retain]; } return self; } - (void)dealloc { [_myTimer invalidate]; [_myTImer release]; [super dealloc]; } - (void)timerTick { // Do something fantastic. } @end That's what I want. I don't want to to have to expose an interface on my class to start and stop the internal timer, I just want it to run while the class exists. Seems simple enough. But the problem is that NSTimer retains its target. That means that as long as that timer is active, it is keeping the class from being dealloc'd by normal memory management methods because the timer has retained it. Manually adjusting the retain count is out of the question. This behavior of NSTimer seems like it would make it difficult to ever have a repeating timer as an ivar, because I can't think of a time when an ivar should retain its owning class. This leaves me with the unpleasant duty of coming up with some method of providing an interface on MyClock that allows users of the class to control when the timer is started and stopped. Besides adding unneeded complexity, this is annoying because having one owner of an instance of the class invalidate the timer could step on the toes of another owner who is counting on it to keep running. I could implement my own pseudo-retain-count-system for keeping the timer running but, ...seriously? This is way to much work for such a simple concept. Any solution I can think of feels hacky. I ended up writing a wrapper for NSTimer that behaves exactly like a normal NSTimer, but doesn't retain its target. I don't like it, and I would appreciate any insight.

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• Problem getting Java Streams in HP Tandem (Non-Stop)

  - by AndreaG

  Hi. We are porting a simple Java application between Tandem NonStop systems, from G-Series to H-Series. Java version is 1.5.0_02. When performing basic I/O tasks like getting output stream from or opening a client socket, we receive exceptions like java.io.IOException: Value out of range or java.net.SocketException: Value out of range ("value out of range" is Tandem native jargon for, well, quite everything I suppose). Has anybody got similar issues? i.e. I/O corruption while for example messing with JNI? I suppose there is something wrong with the system, but where might it be? Thank you. EDIT: adding snippets as requested sample snippet (a) - using Runtime.exec () (adapted) Properties envVars = new Properties(); Process p = r.exec("/bin/env"); envVars.load(p.getInputStream()); Stack trace (a): java.io.IOException: Value out of range (errno:4034) at java.io.FileInputStream.readBytes(Native Method) at java.io.FileInputStream.read(FileInputStream.java:194) at java.lang.UNIXProcess$DeferredCloseInputStream.read(UNIXProcess.java:221) at java.io.BufferedInputStream.read1(BufferedInputStream.java:254) at java.io.BufferedInputStream.read(BufferedInputStream.java:313) at sun.nio.cs.StreamDecoder$CharsetSD.readBytes(StreamDecoder.java:411) at sun.nio.cs.StreamDecoder$CharsetSD.implRead(StreamDecoder.java:453) at sun.nio.cs.StreamDecoder.read(StreamDecoder.java:183) at java.io.InputStreamReader.read(InputStreamReader.java:167) at java.io.BufferedReader.fill(BufferedReader.java:136) at java.io.BufferedReader.readLine(BufferedReader.java:299) at java.io.BufferedReader.readLine(BufferedReader.java:362) at util.Environment.getVariables(Environment.java:39) Last line fails, and output gets redirected to console (!). sample snippet (b) - using HttpURLConnection: public WorkerThread (HttpURLConnection conn, String requestData, Logger logger) { this.conn = conn; ... } public void run () { OutputStream out = conn.getOutputStream (); } Stack trace (b): java.net.SocketException: Value out of range (errno:4034) at java.net.PlainSocketImpl.socketConnect(Native Method) at java.net.PlainSocketImpl.doConnect(PlainSocketImpl.java:333) at java.net.PlainSocketImpl.connectToAddress(PlainSocketImpl.java:195) at java.net.PlainSocketImpl.connect(PlainSocketImpl.java:182) at java.net.Socket.connect(Socket.java:507) at sun.net.NetworkClient.doConnect(NetworkClient.java:155) at sun.net.www.http.HttpClient.openServer(HttpClient.java:365) at sun.net.www.http.HttpClient.openServer(HttpClient.java:477) at sun.net.www.protocol.https.HttpsClient.<init>(HttpsClient.java:280) at sun.net.www.protocol.https.HttpsClient.New(HttpsClient.java:337) at sun.net.www.protocol.https.AbstractDelegateHttpsURLConnection.getNewHttpClient(AbstractDelegateHttpsURLConnection.java:176) at sun.net.www.protocol.http.HttpURLConnection.plainConnect(HttpURLConnection.java:736) at sun.net.www.protocol.https.AbstractDelegateHttpsURLConnection.connect(AbstractDelegateHttpsURLConnection.java:162) at sun.net.www.protocol.http.HttpURLConnection.getOutputStream(HttpURLConnection.java:828) at sun.net.www.protocol.https.HttpsURLConnectionImpl.getOutputStream(HttpsURLConnectionImpl.java:230) Case (a) can be avoided because it was a workaround for other issues with previous JRE version (!), but same behaviour with sockets is really nasty.

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• How to create a TextBox like RichTextBox in WinCE 5.0 OS (C#)?

  - by SmartJJ

  Now I have the following ideas: 1.override TextBox's OnPaint Event,use Graphics to draw rich string-font; 2.use RTF to save and display the rich format. But I do not know which method is better or more difficult. In addition, there are other better way to do. Any ideas are inspiring!

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• Incorrect XML produced by SUDS

  - by Ben

  Hi, I am trying to talk to a SOAP web service using SUDS and Python. After lots of messing around learning Python (yes I am new to this) and working out how to use SUDS I have come across a problem. The signature of the web method I am calling, according to suds, is (FWTCaseCreate){ ClassificationEventCode = None Priority = None Title = None Description = None Queue = None DueDate = None AssociatedObject = (FWTObjectBriefDetails){ ObjectID = (FWTObjectID){ ObjectType = None ObjectReference[] = <empty> } ObjectDescription = None Details = None Category = None } Form = (FWTCaseForm){ FormField[] = <empty> FormName = None FormKey = None } Internal = None InteractionID = None XCoord = None YCoord = None } So I use SUDS to create the classes that I want and send it to the method. However I get an error. So I turned logging on and I can see that the XML that is being sent is not correct which is causing a deserialize error. The SOAP package looks like the following <?xml version="1.0" encoding="UTF-8"?> <SOAP-ENV:Envelope xmlns:ns0="http://www.lagan.com/wsdl/FLTypes" xmlns:ns1="http://schemas.xmlsoap.org/soap/envelope/" xmlns:wsse="http://docs.oasis-open.org/wss/2004/01/oasis-200401-wss-wssecurity-secext-1.0.xsd" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:SOAP-ENV="http://schemas.xmlsoap.org/soap/envelope/"> <SOAP-ENV:Header> <wsse:Security> <wsse:BinarySecurityToken>eaadf1ddff99a8</wsse:BinarySecurityToken> </wsse:Security> </SOAP-ENV:Header> <ns1:Body> <ns0:FWTCaseCreate> <ClassificationEventCode> <ClassificationEventCode>2000023</ClassificationEventCode> <Priority>1</Priority> <Title>testing</Title> <Description>testing</Description> <Queue/> <Internal>True</Internal> <XCoord>356570</XCoord> <YCoord>168708</YCoord> </ClassificationEventCode> </ns0:FWTCaseCreate> </ns1:Body> As you can see there is a 'ClassificationEventCode' element around all the other elements, this should not be there. If I cut and paste this xml into SOAPUI and first remove this element and then post it directly to the web service it works successfully. Does anyone have any ideas why this is happening? I guess SUDS thinks that it should be there based on the WSDL. Thanks.

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• Replacing multiple characters in C#

  - by Yassin

  How would i write a program, using the replace method, that rotates the vowels in a word? meaning the letter 'a' would be 'e', 'e' would be 'i', 'i' would be 'o', 'o' would be 'u', and finally 'u' would be 'a'. For example, the word "instructor" would be "onstractur". I hope someone can answer my problem.

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• Blackberry storm - update layout on tilt

  - by sujithRavindran

  Hi, have developed an app for BB storm while tilting the device the background image of the app screen does not matches with the screen size, i have tried with the sublayout method public void sublayout(int width, int height) { //update scrren layout based on orientation if(Display.getOrientation()== Display.ORIENTATION_LANDSCAPE) { invalidate(); } else if(Display.getOrientation()== Display.ORIENTATION_PORTRAIT) { invalidate(); } super.sublayout(width, height); } Still not successfull can any one help to sort out this tilt issue in BB storm Thanks SujithRavindran Rapidvaluesolutions

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• Codeigniter Best Practices for Model functions

  - by user270797

  Say my application has a "Posts" model, and one of the function is add_post(), it might be something like: function add_post($data) { $this-db-insert('posts',$data); } Where $data is an array: $data = array ('datetime'='2010-10-10 01:11:11', 'title'='test','body'='testing'); Is this best practice? It means if you use that function you need to know the names of the database fields where as my understanding of OOP is that you shouldnt need to know how the method works etc etc

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• How does ruby's rb_raise stop the execution of the c function calling it?

  - by Adrian

  If you write a ruby method as a function in C that uses rb_raise, the part of the function after the call will not get excecuted and the program will stop and you will think that rb_raise used exit(). But if you rescue the exception in ruby, like: begin method_that_raises_an_exception rescue end puts 'You wil still get here.' The ruby code will go on, but your function will stop excecuting. How does rb_raise make this happen?

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• Using getChar() in a while loop

  - by GOPI

  #include <stdio.h> main() { int c ; while ((c = getchar()) != EOF) { int isEOF = (c==EOF); printf("is %c EOF: %d ", c, isEOF); } } Why printf() method is called twice on every input char here?

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• What is the difference between this initialization methods?

  - by Samvel Siradeghyan

  Hi all What is the difference between this two codes? class SomeClass { SomeType val = new SomeType(); } and class SomeClass { SomeType val; SomeClass() { val = new SomeType(); } } Which method is preferd?

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• GWT FormPanel not submitting in IE - works fine on FF, Chrome, Safari

  - by JohnIdol

  I am using a simple FormPanel in GWT (com.google.gwt.user.client.ui.FormPanel). Once setting the action for the form, in Firefox, Safari, Chrome the submit method works fine while in IE (8) nothing happens when submit is called (I am submitting a form to paypal, not that it matters). I am on GWT 2.0. Is this some kind of known problem? Been looking around but couldn't find anything on the subject. Any help appreciated!

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• jqGrid search/filter data api

  - by McLovin

  I've already read all available documentation and I cannot find a solution. I have a calendar outside of the grid which on click returns a date. All I need to do is filter my jqGrid based on that date. Can someone point me to the correct API method? Thanks!

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• UIView "suck" animation

  - by igul222

  I'd like to use the UIView "sucking" transition (view is "sucked" into a point) referenced here: http://iphonedevwiki.net/index.php/UIViewAnimationState#Using_suckEffect The method above, however, uses private APIs, which makes it next to useless for an App Store app. How can I recreate a similar effect without relying on private APIs? I'm guessing the answer has to do with OpenGL, although I have zero experience there.

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• Serializing Class Derived from Generic Collection yet Deserializing the Generic Collection

  - by Stacey

  I have a Repository Class with the following method... public T Single<T>(Predicate<T> expression) { using (var list = (Models.Collectable<T>)System.Xml.Serializer.Deserialize(typeof(Models.Collectable<T>), FileName)) { return list.Find(expression); } } Where Collectable is defined.. [Serializable] public class Collectable<T> : List<T>, IDisposable { public Collectable() { } public void Dispose() { } } And an Item that uses it is defined.. [Serializable] [System.Xml.Serialization.XmlRoot("Titles")] public partial class Titles : Collectable<Title> { } The problem is when I call the method, it expects "Collectable" to be the XmlRoot, but the XmlRoot is "Titles" (all of object Title). I have several classes that are collected in .xml files like this, but it seems pointless to rewrite the basic methods for loading each up when the generic accessors do it - but how can I enforce the proper root name for each file without hard coding methods for each one? The [System.Xml.Serialization.XmlRoot] seems to be ignored. When called like this... var titles = Repository.List<Models.Title>(); I get the exception <Titlesxmlns=''> was not expected. The XML is formatted such as. .. <?xml version="1.0" encoding="utf-16"?> <Titles xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:xsd="http://www.w3.org/2001/XMLSchema"> <Title> <Id>442daf7d-193c-4da8-be0b-417cec9dc1c5</Id> </Title> </Titles> Here is the deserialization code. public static T Deserialize<T>(String xmlString) { System.Xml.Serialization.XmlSerializer XmlFormatSerializer = new System.Xml.Serialization.XmlSerializer(typeof(T)); StreamReader XmlStringReader = new StreamReader(xmlString); //XmlTextReader XmlFormatReader = new XmlTextReader(XmlStringReader); try { return (T)XmlFormatSerializer.Deserialize(XmlStringReader); } catch (Exception e) { throw e; } finally { XmlStringReader.Close(); } }

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• Placing arrow of uipopovercontroller at annotation point on mapkit

  - by Jann

  I am trying to get a popover to appear at a map kit annotation point but cannot find a "rect" in the annotation view properties to use the rect method of calling uipopovercontroller. If given an annotation on map kit how does one find the appropriate "frame"?

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