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  • Performance Cost of a Memcopy in C/C++

    - by Cenoc
    So whenever I write code I always think about the performance implications. I've often wondered, what is the "cost" of using a memcopy relative to other functions in terms of performance? For example, I may be writing a sequence of numbers to a static buffer and concentrate on a frame within the buffer, in order to keep the frame once I get to the end of the buffer, I might memcopy all of it to the beginning OR I can implement an algorithm to amortize the computation.

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  • Trouble reinstalling Gem after failure

    - by Sirupsen
    Yesterday I tried to install Jeweler via Rubygems, however somewhere in the middle of the process I had a power failure, resulting in my computer turning off in the middle of the installation process. Once I got it back up, I tried to reinstall Jeweler, however resulting in an error I've had trouble decoding. Does anyone have any idea on how to fix this problem? (I tried uninstall, cleanup and check)

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  • Section of website to be protected by a login

    - by shane
    I have a section of my website where I will have forms. I only want people who have registered with the site to be able to use these forms so that I only have serious customers using them. So what i want to have is a way that people can register on the site and once registered the area with the forms will be available to them and I will know who has sent me a form etc.

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  • How do I write to command line in c#?

    - by ben
    Hi I know how to write to console but if I write to console in my program and call my program from the command line it won't display anything. How do I make it so that when I say Console.WriteLine or Console.Out.Writeline ir prints to the command prompt from which it was called and not somewhere else? Once again I know how to do Console.WriteLine so it's not that :-p unless I'm doing it wrong. From what I can tell it's probably something to do with Console.SetOut(TextWriter t)

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  • When encrypting data that is not an even multiple of the block size do I have to send a complete las

    - by WilliamKF
    If I am using a block cipher such as AES which has a block size of 128 bits, what do I do if my data is not an even multiple of 128 bits? I am working with packets of data and do not want to change the size of my packet when encrypting it, yet my data is not an even multiple of 128? Does the AES block cipher allow handling of a final block that is short without changing the size of my message once encrypted?

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  • How to delete many-to-many records in Doctrine?

    - by terrani
    Hi All, I am trying to delete records in many to many using Doctrine. I used code on http://www.doctrine-project.org/documentation/manual/1_2/ru/working-with-models#many-to-many-relations:deleting-a-link when I do the first method, it just deletes UserGroup record ONLY. How do I delete User, Group, and UserGroup records at once? The second and thrid methods do not work as well.

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  • Best way to get the highest sum from a Matrix (using Java but algorithm is the issue here)

    - by user294896
    Sorry I dont know the correct terminology to use but I have a 3x3 matrix like this 1 3 4 5 4 5 2 2 5 and I want get the highest score by picking a value from each row/column but I cant pick the same row or column more than once , so the answer in this case is 3 + 5 + 5 = 13 (row0,col1 + row1,col0 + row2,col2) 4 + 5 + 5 = 14 is not allowed because would have picked two values from col2 I'm using Java, and typically the matrix would be 15 by 15 in size. Is there a name for what Im trying to do, and whats the algorithm thanks Paul

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  • Code generator tool to generate a property and backing field

    - by MattSlay
    I'm working in VS2008 and C#, and I'm looking for a (free) code generator tool to generate a property with getter and setter, as well as the backing private field to go with. The template thingy in VS does not make the field to go with it. Just looking for something a little bit better. I once saw a web site where you could build this code, then cust-and-paste it from the web page to your code.

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  • Can't read AppletViewer properties file - Applet

    - by White rose
    I have create a java applet program and compiled, it generates a class file. while running the applet viewer in command prompt it shows a following warning message. D:\Applets\Appletsappletviewer FirstApplet.java Warning: Can't read AppletViewer properties file: C:eswaran_s.VMSPL.hotjava\properties Using defaults. After I have run this command once again, it does not shows a warning messsage but the applet viewer is not running. How can I solve this issue?

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  • Making a WCF call with AJAX

    - by DotnetDude
    Is it required to use a RESTful service to be able to make a ajax call to a wcf service (for example: by using WebInvoke attribute on Operation contracts) Once a service is made RESTful by adding a webHttp binding on the service host, can the host have other endpoints as well? (wsHttp or netTcp) Is it required that the aspNetCompatibilityEnabled be set to true for a service that has webHttp binding (and can this setting coexist for other endpoints) I understand I can use both JQuery and ScriptManager for making WCF calls on the client. Why should I use one over the other?

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  • How to exit an air application from an actionscript library?

    - by Vincen Collins
    I am trying the following but every once in awhile the nativeApp is not defined. var nativeApp:Object = getDefinitionByName("flash.desktop.NativeApplication"); nativeApp.nativeApplication.exit(); I am confused why sometimes getDefinitionByName("flash.desktop.NativeApplication") resolves and other times it does not. I am trying to resolve this problem to address the following issue in flexcover - http://code.google.com/p/flexcover/issues/detail?id=33

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  • inputAccessoryView not hide the view when -resignFirstResponder?

    - by Sam Jarman
    I have attached a toolbar with a UITextField and UIButton to the keyboard when it becomes the first responder via the user taping inside the textfield textField.inputAccessoryView = theToolbar; Problem is, the toolbar disappears when the keyboard is dismissed, thus preventing any further input. Any ideas on how to make the toolbar go back to the bottom of the screen rather than off it completely? I'm thinking a delegate method might help but Im really not too sure. It seems once the inputAccessoryView always the inputAccessoryView :( Cheers

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  • Program crashes after trying to use a recently created file. C#

    - by Jason T.
    So here is my code if (!File.Exists(pathName)) { File.Create(pathName); } StreamWriter outputFile = new StreamWriter(pathName,true); But whenever I run the program the first time the path with file gets created. However once I get to the StreamWriter line my program crashes because it says my fie is in use by another process. Is there something I'm missing between the File.Create and the StreamWriter statements?

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  • Createing a Document Workspaces for Workflow in Sharepoint

    - by Tots
    I need to create a workflow that routes a document to a reviewer and upon approval creates a document workspace in SharePoint 2007. Setting up the workflow for the the approval of the document is simple, but I'm unsure of how to create the document workspace upon approval. I want the document workspace to be created programmatically once the document is approved. Can someone recommend an approach for accomplishing this?

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  • hook up resource manager in windows form

    - by peterchen0303
    In Visual Studio 2008, develop legacy windows form (not wpf), I wrote customized resource manager which fetched data from sql server rather than assembly. In windows form, there is property related to language setting. Once I change language, I want to form being updated automatically. Is there any elegant way to hook up my resource manager?

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  • Oracle select query

    - by Jasim
    I have a table like this C1 C2 C3 Code 1 2 3 33 1 2 3 34 2 4 1 14 1 2 3 14 i want to select only those record whose code is appearing only in single row. ie, in this case rows with code 33 and 34.. as they appear only once in this table. How can i write a query for that

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  • Magento backend problem

    - by Eric Di Bari
    I've just installed Magento on my website, but I can't access the backend. The frontend works fine, but in the backend once I successfully login, it takes me to a blank screen. I've read there's an issue with cookies and I've tried a range of commenting out lines in varien.php, but didn't work.

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  • Exception throws: encapsulate them or not?

    - by Simon
    Hi there. Once I read an MSDN article that encouraged the following programming paradigm: public class MyClass { public void Method1() { NewCustomException(); } public void Method2() { NewCustomException(); } void NewCustomException() { throw new CustomException("Exception message"); } } Do you think this paradigm makes sense? Wouldn't it be enough to store the exception message in a static const field and then pass it to the exception's constructor, instead of encapsulating the whole exception throw?

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  • Twitter feed only load periodically

    - by William
    I've tried many jQuery twitter feed plugins and they all seem to suffer from the same problem. Nothing loads for unless I refresh several times and then it will load once. I then need to refresh several more times before it loads again. Is there some sort of limitation on Twitters side or does this only happen to me? Example - This is the test site but it is basically ready to go live except for this issue.

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  • What's the Flash equivalent of FlexEvent.CREATION_COMPLETE

    - by John
    I'm moving some Flex classes to pure Flash/AS3 to be part of a shared library. I have an event listener on FlexEvent.CREATION_COMPLETE to create and add display-objects once things are running, but I don't know the right way to do this in Flash? edit: Maybe if my class subclasses Sprite rather than a Flex class, I can add children in the constructor, I don't need to wait for a "construction complete" event?

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