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• Turning an NSImage* into a CGImageRef?

  - by Brian Postow

  Is there an easy way to do this that works in 10.5? In 10.6 I can use nsImage CGImageForProposedRect: NULL context: NULL hints: NULL If I'm not using 1b black and white images (Like Group 4 TIFF), I can use bitmaps, but cgbitmaps seem to not like that setup... Is there a general way of doing this? I need to do this because I have an IKImageView that seems to only want to add CGImages, but all I've got are NSImages. Currently, I'm using a private setImage:(NSImage*) method that I'd REALLY REALLY rather not be using...

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• What do I return if the return type of a method is Void? (Not void!)

  - by DR

  Due to the use of Generics in Java I ended up in having to implement a function having Void as return type: public Void doSomething() { //... } and the compiler demands that I return something. For now I'm just returning null, but I'm wondering if that is good coding practice... I've also tried Void.class, void, Void.TYPE, new Void(), no return at all, but all that doesn't work at all. (For more or less obvious reasons) (See this answer for details) So what am I supposed to return if the return type of a function is Void? What's the general use of the Void class? EDIT: Just to spare you the downvotes: I'm asking about V?oid, not v?oid. The class Void, not the reserved keyword void.

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• Adding WPF Text Writer Trace Listener in an Outlook Add In using wpf window/control

  - by Deepak N

  I'm working on a outlook 2003 AddIn using VSTO SE.We have few customized windows developed in WPF. It looks there are few client machines have problem with WPF rendering due to which there could be an exception due to addin is getting disabled. I added a outlook.exe.config and added trace listeners for wpf Trace sources. I set it up according this link. The console trace listener is working fine for me. But I'm not able get the TextWriterTraceListener working with config <add name="textListener" type="System.Diagnostics.TextWriterTraceListener" initializeData="Trace.log" /> I tried giving absolute path for trace log file as "C:\Trace.log".The TextWriterTraceListener worked for a dummy wpf app with the same config. Am I missing anything here.

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• How can I dispatch an PropertyChanged event from a subscription to an Interval based IObservable

  - by James Hay

  I'm getting an 'UnauthorizedAccesExpection - Invalid cross-thread access' exception when I try to raise a PropertyChanged event from within a subscription to an IObservable collection created through Observable.Interval(). With my limited threading knowledge I'm assuming that the interval is happening on some other thread while the event wants to happen on the UI thread??? An explanation of the problem would be very useful. The code looks a little like: var subscriber = Observable.Interval(TimeSpan.FromSeconds(1)) .Subscribe(x => { Prop = x; // setting property raises a PropertyChanged event }); Any solutions?

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• External XMPP component - Anyone know a Tutorial or Open Source Example please?

  - by gav

  Hi All, I want to run an XMPP server (Openfire) and register an external component to handle the messages it will recieve (using the Whack library). The external component will run my game logic and I will be using XMPP to send player moves to the server and status updates in the other direction. The bonus with XMPP is that we get built in chat for free. The trouble is, although Ignite look fairly established, I can't find a tutorial on how to write, register and debug an External XMPP component written with Whack, there are very few in general for that matter. I am not invested in either the server implementation or the External Component library, java is just my language of choice. If I was to move to Erlang or Scala or something it would have to be a very simple in that language. A single tutorial or example would go a long way here, I just need an basic External XMPP component pretty please! Kind regards, Gavin

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• Message Queue or Scheduler

  - by Walter White

  Hi all, I am currently using Quartz Scheduler for asynchronous tasks such as sending an email when an exception occurs, sending an email from the web interface, or periodically analyzing traffic. Should I use a message queue for sending an email? Is it any more efficient or correct to do it that way? The scheduler approach works just fine. If I use a queue and the email failed to send, is it possible for the queue to retry sending the email at a later time? The queue approach looks simpler than the scheduler for tasks that need to happen immediately, but for scheduler tasks, the scheduler still, unless there is more to the queue than I am aware of. I have not yet used JMS, so this is what I have read. Walter

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• Tips on upgrading CVS to git/hg?

  - by meder

  We still use CVS, I use git and hg for my personal use though I'm still a novice at both, but I realize they're much more modern and better, faster, distributed, etc. It's just everyone is so accustomed to CVS that I feel a whole slew of issues could arise if I were to be the one that recommended and actually did the upgrading/porting/transitioning of our current CVS server to git or hg. Has anyone actually done this, recently? Could you offer any insight or tips in terms of influencing people to use git/hg, and just generic tips on the actual updating/transitioning if it were to take place? Are there common issues I should be aware of just in general?

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• OutOfMemoryError what to increase and how?

  - by Pentium10

  I have a really long collection with 10k items, and when running a toString() on the object it crashes. I need to use this output somehow. 05-21 12:59:44.586: ERROR/dalvikvm-heap(6415): Out of memory on a 847610-byte allocation. 05-21 12:59:44.636: ERROR/dalvikvm(6415): Out of memory: Heap Size=15559KB, Allocated=12932KB, Bitmap Size=613KB 05-21 12:59:44.636: ERROR/AndroidRuntime(6415): Uncaught handler: thread main exiting due to uncaught exception 05-21 12:59:44.636: ERROR/AndroidRuntime(6415): java.lang.OutOfMemoryError 05-21 12:59:44.636: ERROR/AndroidRuntime(6415): at java.lang.AbstractStringBuilder.enlargeBuffer(AbstractStringBuilder.java:97) 05-21 12:59:44.636: ERROR/AndroidRuntime(6415): at java.lang.AbstractStringBuilder.append0(AbstractStringBuilder.java:155) 05-21 12:59:44.636: ERROR/AndroidRuntime(6415): at java.lang.StringBuilder.append(StringBuilder.java:202) 05-21 12:59:44.636: ERROR/AndroidRuntime(6415): at java.util.AbstractCollection.toString(AbstractCollection.java:384) I need step by step guide how to increase the heap for and Android application. I don't run the command line.

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• vb.net program cannot connect to wampserver

  - by user225269

  I have a vb.net program that uses mysql as its database. And it works when the computer has wampservr installed. But the program gets an unhandled exception error when the computer where its running does not have a wampserver. The only thing that is installed in it is the mysql connector net. How do I make it work. I just want the two programs to access the same mysql database. I already opened port 20 by configuring firewall. Both in TCP and UDP. What do I do? Do I have to tweak the codes?

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• Websphere MQ 7.0 + jars compatible with 5.3 and 6.0 MQSeries servers ?

  - by avinash

  I tried connecting jms client with 5.3 / 6.0 MQseries client jars to 7.0+ server, but it threw follwoing exception com.ibm.mq.MQException: MQJE001: Completion Code 2, Reason 2423 at com.ibm.mq.MQQueueManager.sequentialConstruct(MQQueueManager.java:904) at com.ibm.mq.MQQueueManager.(MQQueueManager.java:865) at com.ibm.mq.MQSPIQueueManager.(MQSPIQueueManager.java:83) at com.ibm.mq.jms.MQConnection.createQM(MQConnection.java:2009) at com.ibm.mq.jms.MQConnection.createQMNonXA(MQConnection.java:1496) at com.ibm.mq.jms.MQQueueAgentThread.setup(MQQueueAgentThread.java:306) at com.ibm.mq.jms.MQQueueAgentThread.run(MQQueueAgentThread.java:1672) at java.lang.Thread.run(Thread.java:570) I do understand from http://www.ibm.com/developerworks/websphere/library/techarticles/0704_xu/0704_xu.html that it's not possible to use previous version client libs. But my question is are these latest client libs backward compatible with 5.3 / 6.0 servers ?

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• VS2010 / Code Analysis: Turn off a rule for a project without custom ruleset....

  - by TomTom

  ...any change? The scenario is this: For our company we develop a standard how code should look. This will be the MS full rule set as it looks now. For some specific projects we may want to turn off specific rules. Simply because for a specific project this is a "known exception". Example? CA1026 - while perfectly ok in most cases, there are 1-2 specific libraries we dont want to change those. We also want to avoid having a custom rule set. OTOH putting in a suppress attribute on every occurance gets pretty convoluted pretty fast. Any way to turn off a code analysis warning for a complete assembly without a custom rule set? We rather have that in a specific file (GlobalSuppressions.cs) than in a rule set for maintenance reasons, and to be more explicit ;)

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• What parser generator do you recommend

  - by stefan.ciobaca

  I'm currently shopping for a FOSS parser generator for a project of mine. It has to support either C or C++. I've looked at bison/flex and at boost::spirit. I went from writing my own to spirit to bison to spirit to bison to spirit, each time hit by some feature I found unpleasant. The thing I hate most about bison/flex is that they actually generate C/C++ source for you. There are a number of disadvantages to this, e.g. debugging. I like spirit from this point of view, but I find it very very heavy on syntax. I am curious about what you are using, what you would recommend, and general thoughts about the state of the art in parser generators. I am also curious to hear about approaches being used in other languages for parsing problems.

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• Collection <NSCFSet: 0x1b0b30> was mutated while being enumerated. How to determine which set?

  - by jamone

  I'm doing a bunch of core data inserts and after 20k or so inserts with saves every 1-2k I get this error: Terminating app due to uncaught exception 'NSGenericException', reason: '*** Collection <NSCFSet: 0x1b0b30> was mutated while being enumerated.' I'm trying to figure out which NSSet is causing this. I've done a search and the only NSSets in my code are the autogenerated ones that handle the Core Data relationships. I'm using NSXMLParser and for each element found creating a new entity (if a matching one doesn't already exist). So I will create a state entity and then populate all the city entities and then do a save. This means that a state's NSSet *cities is getting added to but I don't see why you can't do that.

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• EnvDTE: ArgumentException when accessing the ActiveConfiguration

  - by Smith

  Hello, I'm writing an addin for Visual Studio 2008. At some point in my code, I'm attempting to access the current active configuration for a project: var configName = _Project.ConfigurationManager.ActiveConfiguration.ConfigurationName; Sometimes, in some very obscure cases, the getter for ActiveConfiguration throws an ArgumentException. Nothing in the documentation says anything about this (but given the very poor quality of the documentation, it was to be expected), and the exception's message is not helping at all. Also, ConfigurationManager is an interface, and I don't know what's the real implementation behind it, so I can't simply disassemble it in Reflector to know the cause. Any help would be greatly appreciated.

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• Why is my test not running

  - by Gandalf StormCrow

  Strangest thing happened my test was running ok and now its not anymore I didn't change the code at all here is the exception : Class not found com.example.test java.lang.ClassNotFoundException: com.example.test at java.net.URLClassLoader$1.run(URLClassLoader.java:202) at java.security.AccessController.doPrivileged(Native Method) at java.net.URLClassLoader.findClass(URLClassLoader.java:190) at java.lang.ClassLoader.loadClass(ClassLoader.java:307) at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:301) at java.lang.ClassLoader.loadClass(ClassLoader.java:248) at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.loadClass(RemoteTestRunner.java:693) at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.loadClasses(RemoteTestRunner.java:429) at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.runTests(RemoteTestRunner.java:452) at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.runTests(RemoteTestRunner.java:683) at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.run(RemoteTestRunner.java:390) at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.main(RemoteTestRunner.java:197)

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• Ideas for web development practical jokes?

  - by Ellie P.

  I am a web developer for a Django-based site for a student organization, and I have the opportunity to make the website temporarily absurd for a day of general campus-wide debauchery and chaos (long story, doesn't matter.) What are your best ideas for web development practical jokes (that you could never use in the real world)? For example, one idea we had was to use a client-side script to convert each character to its upside down equivalent in Unicode, si?? ??i? ?ui????os. I'm not necessarily looking for Django-specific solutions. I imagine most of these things would happen on the front-end. I am also quite aware that usability will suffer considerably--the point is to be fun for a day, and there will always be a link to the normal version of the site. Also, everything must be relatively cosmetic and easily reversible--I'm happy to swap out static CSS/JS/HTML/templates/images, and even temporarily add a django view, but no messing with the data level!

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• Hooks...exactly what they are

  - by Ygam

  I have seen hooks in Kohana PHP framework, and they work as some sort of a callback function triggered by a certain event (Kohana's events that is, some sort of method overloading). I have seen hooks in Wordpress, and I don't know what they are or how to use them (just saw them yesterday). I'm looking for events in "non-frameworked" php, I cannot find ones. Do hooks work only in an "event-based" environment? What are they anyway (in general, not just in PHP)? What are they good for if not in an "event-based" environment.

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• What's your hobby website; do you maintain it for your users or yourself?

  - by Glennular

  What is your hobby website? Do you care if it has high traffic or is it more for personal satisfaction? When deciding on the features to implement are you taking in to consideration the needs of general user-base or features you really want to build? What balance do you use to keep yourself satisfied as well as your users? When do you feel your site is able to release to the world? Do you release it initially and hope for anticipatory beta group? or wait till you have a solid built set of features?

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• How to hook Pivotal Tracker to Redmine?

  - by cloneofsnake

  Our company is currently using Redmine, it's great for general tasks / troubleshooting (operation) but for development, I would like to adopt a more agile tool... and I found it in pivotaltracker. I googled but couldn't find any info., so that gave me a good excuse to try StackOverflow. Has anyone done it? I'm thinking of using PivotalTracker as the main tool, and all activities will be posted back to redmine for archiving and reporting. (Redmine isn't particularly strong at that either, but it does have a budget plugin and I can query the database directly for my custom reports.) Thanks.

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• Best practices for fixed-width processing in .NET

  - by jmgant

  I'm working a .NET web service that will be processing a text file with a relatively long, multilevel record format. Each record in the file represents a different entity; the record contains multiple sub-types. (The same record format is currently being processed by a COBOL job, if that gives you a better picture of what we're looking at). I've created a class structure (a DATA DIVISION if you will) to hold the input data. My question is, what best practices have you found for processing large, complex fixed-width files in .NET? My general approach will be to read the entire line into a string and then parse the data from the string into the classes I've created. But I'm not sure whether I'll get better results working with the characters in the string as an array, or with the string itself. I guess that's the specific question, string vs. char[], but I would appreciate any other pointers anyone has. Thanks.

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• Linux, static lib referring to other static lib within an executable

  - by andras

  Hello, I am creating an application, which consists of two static libs and an executable. Let's call the two static libs: libusefulclass.a libcore.a And the application: myapp libcore instantiates and uses the class defined in libusefulclass (let's call it UsefulClass) Now, if I link the application in the following way: g++ -m64 -Wl,-rpath,/usr/local/Trolltech/Qt-4.5.4/lib -o myapp src1.o src2.o srcN.o -lusefulclass -lcore The linker complains about the methods in libusefulclass not being found: undefined reference to `UsefulClass::foo()' etc. I found a workaround for this: If UsefulClass is also instantiated within the source files of the executable itself, the application is linked without any problems. My question is: is there a more clean way to make libcore refer to methods defined in libusefulclass, or static libs just cannot be linked against eachother? TIA P.S.: In case that matters: the application is being developed in C++ using Qt, but I feel this is not a Qt problem, but a library problem in general.

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• Is there a suggested solution structure for ASP.NET MVC Production Apps

  - by Eoin Campbell

  In general, I don't like to keep code (BaseClasses or DataAccess Code) in the App_Code directory of an ASP.NET Site. I'll usually pull this stuff out into a MySite.BusinessLogic & MySite.DataAccess DLL's respectively. I'm wondering should I be doing the same for ASP.NET MVC. Would it be better to Organise the solution something along the lines of MySite.Common - DLL - (Basic Functionality built on .NET System Dlls) MySite.DAL - DLL - (DataAccessLayer & DBML Files) MySite.Models - DLL - (MVC Models e.g. Repository Classes) MySite.Controllers - DLL (MVC Controllers which use Models) MySite - ASP.NET MVC Site. Or am I missing something... presumably, I'll lose some of the nice (Add View, Go To Controller, context menu items that have been added)

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• NAnt build issues with Mono

  - by calmcajun

  I am trying to build a Mono project using NAnt but I get the error listed below. I have tried altering the environment variable PKG_CONFIG_PATH to include the path leading to the file: mono.pc but that does not seem to work. Failed to initialize the 'Mono 3.5 Profile' (mono-3.5) target framework.: NAnt.Core.BuildException: Failed to initialize the 'Mono 3.5 Profile' (mono-3.5) target framework. ---> Unable to locate 'mono' module using pkg-config. Download the Mono development packages from http://www.mono-project.com/downloads/.: NAnt.Core.BuildException: Unable to locate 'mono' module using pkg-config. Download the Mono development packages from http://www.mono-project.com/downloads/. at NAnt.Core.Tasks.FailTask.ExecuteTask () [0x00000] in <filename unknown>:0 at NAnt.Core.Task.Execute () [0x00000] in <filename unknown>:0 --- End of inner exception stack trace --- at NAnt.Core.FrameworkInfo.Init () [0x00000] in <filename unknown>:0 at NAnt.Core.FrameworkInfo.Validate () [0x00000] in <filename unknown>:0 at NAnt.Core.ProjectSettingsLoader.ConfigureRuntimeFramework () [0x00000] in <filename unknown>:0

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• Android: Image displayed at Webview from Url with high quality loss

  - by Merlino

  I want to display an image from an url with an Webview at Android. With Android phones with Version 1.5 and 1.6 there is no problem. but the same pic and the same code on an AndroidPhone with Version 2.0 and the pic is totaly pixelated. Like Android is resizing the image first to a smaller one and then resizing it back to "normal" size. Unfortunately its important to display the pic without any quality loss. I tried to integrate it in the sourcefolder to show it as an normal image, but at Android 2.0 i get an exception because the image is to big. (At Android 1.6 there is no problem) Any ideas how i can display the image without quality loss with Android 2.0 ?

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• noClassDefFoundError using Scala Plugin for Eclipse

  - by Jacob Lyles

  I successfully implemented and ran several Scala tutorials in Eclipse using the Scala plugin. Then suddenly I tried to compile and run an example, and this error came up: Exception in thread "main" java.lang.NoClassDefFoundError: hello/HelloWorld Caused by: java.lang.ClassNotFoundException: hello.HelloWorld at java.net.URLClassLoader$1.run(URLClassLoader.java:200) at java.security.AccessController.doPrivileged(Native Method) at java.net.URLClassLoader.findClass(URLClassLoader.java:188) at java.lang.ClassLoader.loadClass(ClassLoader.java:315) at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:330) at java.lang.ClassLoader.loadClass(ClassLoader.java:250) at java.lang.ClassLoader.loadClassInternal(ClassLoader.java:398) After this point I could no longer run any Scala programs in Eclipse. I tried cleaning and rebuilding my project, closing and reopening my project, and closing and reopening Eclipse. Eclipse version number 3.5.2 and Scala plugin 2.8.0 Here is the original code: package hello object HelloWorld { def main(args: Array[String]){ println("hello world") } }

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