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  • What's the performance penalty of using isKindOfClass in Objective C?

    - by durcicko
    I'm considering introducing: if ([myInstance isKindOfClass:[SomeClass class]]) { do something...} into a piece of code that gets called pretty often. Will I introduce a significant performance penalty? In Objective C, is there a quicker way of assessing whether a given object instance is of certain class type? For example, is the following quicker? (I realize the test is somewhat different) if (myInstance.class == [SomeClass class]) { do something else...}

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  • access list element from thread

    - by phm
    Hello I have a "List" in the main application and I am trying to access its elements from within a thread. I am getting this exception: {"The calling thread cannot access this object because a different thread owns it."} System.SystemException {System.InvalidOperationException} Thanks

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  • Objective C IBOutlets

    - by Alan
    In cases where multiple buttons call an IBOutlet, can the IBOutlet determine which button was pressed? edit: All fixed and wired up. key point: Object ID is not sender tag! Tag is a standalone value on the first page of the attributes. - (IBAction)buttonPressed:(id)sender { switch ( [sender tag] ) { case 109: NSLog(@"Button 1"); break; case 108: NSLog(@"Button 2"); break; } }

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  • c#: what is the purpose of wpf vs. winforms [closed]

    - by every_answer_gets_a_point
    i know wpf can be richer-looking, but what is the point of using them if they complicate things so much? for example if i want to do something on form load in wpf i have to through the trouble of writing this: public MyWindow() { Loaded += MyWindow_Loaded; } private void MyWindow_Loaded(object sender, RoutedEventArgs e) { // do work here } whereas in winforms all i do is double click on the form the question is what are the benefits of using wpf over winforms?

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  • What happens in memory when a C++ class is instantiated

    - by Jo Bucher
    I'm interested in the nuts and boltw of C++ and I wondered what actually changes when an object is instantiated. I'm particularly interested if the functions are then added to memory, if they are there from runtime or if they are never stored in memory at all. If anyone could direct me to a good site on some of the core bolts of C and C++, I'd love that too. Thanks, Jo

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  • Is it possible to use pure Encoding and Decoding keys in asymmetric cryptography instead of private

    - by macropas
    Is it possible to use pure Encoding and Decoding keys instead of private and public keys? As I know in .Net asymmetric RSA implementation private key RSAParameters parameters = (new RSACryptoServiceProvider()).ExportParameters(true) is a superset of public key. And using private key we can both encode and decode our data. But I need key only for decoding data. How to do it? I experimented on nulling RSAParameters fields, but RSACryptoServiceProvider object can't import such parameters.

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  • Changing the color of a QTextBlock that is within a QTextDocument

    - by yan bellavance
    Is there any other way to change the QTextLayout of a QTextBlock that is within a QTextDocument without having to subclass QAbstractTextDocumentLayout and call its documentChanged? I know that on a call to QTextBlock::layout() const ; the returned QTextLayout object can only be modified from the documentChanged implementation of a QAbstractTextDocumentLayout subclass but I was wodering if there was any other way before I implemented it.

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  • how can i write line by line in txt data?

    - by Phsika
    I try to write line by line data but. if i run my application. writng last text1 data in script.txt private void button1_Click(object sender, EventArgs e) { System.IO.TextWriter tw; tw = new StreamWriter("C:/Script.txt"); tw.WriteLine(textBox1.Text); tw.Close(); }

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  • How do I track the method the user is looking at in VS 2010 IDE as an Addin

    - by Rob
    I have been wandering around the object model for VS 2010 and haven't been able to work out the best method for watching what the user is looking at in the main edit window. I know that each Class/method/property is broken down into its own . What I would ideally like is to hook to an event which says "The user has moved the cursor onto Project.Class.Method" and ideally "and is looking at line 4". Any suggestions?

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  • How do I cause the controller buttons to display for an Apple Quicktime video embedded in Firefox?

    - by Doug Treadwell
    I am trying to embed a Quicktime video in Firefox, but when I do the controller buttons do not appear. I've tried both the old style embed tag and the new style object tags, but when I set the "controller" option to true there is no change in the appearance of the plugin. The video loads, but it is zoomed in on some portion of the video and there are no buttons to play, pause, etc.

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  • Generating ActionScript value objects from middle-tier Java classes

    - by eli
    In a Flex / Java app stack using remoting (via BlazeDS), classes to hold data passed back and forth between client and server need to be maintained in both the client (in ActionScript) and server (in Java). I want a way to maintain theses classes in Java only, and have the corresponding ActionScript value object classes generated by the build process.

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  • Anyone familiar with CurvyCorners JS?

    - by Kyle Sevenoaks
    I am trying to implement the CurvyCorners script onto the site: euroworker.no. It reports back that certain CSS values don't exist on the page, how I can I turn off this alert? Found the alert code: if (j === null) curvyCorners.alert("No object with ID " + arg + " exists yet.\nCall curvyCorners(settings, obj) when it is created.");

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  • What causes memory fragmentation in .NET

    - by Matt
    I am using Red Gates ANTS memory profiler to debug a memory leak. It keeps warning me that: Memory Fragmentation may be causing .NET to reserver too much free memory. or Memory Fragmentation is affecting the size of the largest object that can be allocated Because I have OCD, this problem must be resolved. What are some standard coding practices that help avoid memory fragmentation. Can you defragment it through some .NET methods? Would it even help?

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  • Using .net Datetime in sql query

    - by Patrick
    I have a DateTime object I want to compare against an sql datetime field in a where clause. I'm currently using: "where (convert( dateTime, '" & datetimeVariable.ToString & "',103) <= DatetimeField)" But I believe datetimeVariable.ToString will return a different value depending on the culture where the system is running. How would you handle this so it is culture independent?

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  • Convert Line breaks to html break for all field getters in Symfony project

    - by Ben
    I am working on a Symfony project and I currently have this: <?php echo preg_replace('/\n/','<br />', $review->getComments()); ?> and would very much like to be able to make all getters add html line breaks so i don't have to pepper my code with preg_replace. the $object-getFieldname methods are work automatically so I am looking to extend this somewhere to globally add a new method. What is the best approach here?

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  • LINQ to NETEZZA

    - by CraigS
    Does anyone know if it is possible to use LINQ to query a NETEZZA back-end? Update: I've tried both the ODBC and OLEDB Netezza drivers, but neither work. Both give a "The selected object(s) use an unsupported data source" error.

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