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  • How does cobol store and retrieve data?

    - by controlfreak123
    I'm starting to learn about COBOL. I have some experience writing programs that deal with sql databases and I guess I'm confused how cobol stores and retrieves data that is stored in a mainframe for example. I know that it's not like relational databases but every example program I've seen takes data straight from the command line and I know thats not how real world COBOL programs process the data. Can someone explain or show me a good resource that can explain it?

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  • Refresh ASP.NET Role Provider

    - by eidylon
    Hi all, simple question... Given I have an ASP.NET site, which uses a [custom] RoleProvider, Is there any way in which I can somehow "refresh" the provider without forcing the user to log out of the site and log back in? I'm looking for something that would be akin to a fictional method Roles.Refresh() Specifically, I am looking at this for if an administrator changes a user's roles, the user sessions could maybe refresh themselves every 10 minutes or something.

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  • What's your all-time creativity problem?

    - by furtelwart
    Sometimes, you stumble with programming. Sometimes, it's a lack of creativity, sometimes, you need a new solution. But there are a lot of situations, you stick in, every time they occur. For myself, it's when I have to create the interface between model and viewer. I designed my data structure very well and drew a GUI prototype, but the missing link won't be written. What are your personal barricades in developing projects?

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  • How to remove ˆM chars?

    - by LucaB
    I have a file generated from windows that I have to paste into a script under linux. My script works fine, except for the fact that at the end of every line I got a ^M char. How can I remove it with bash? Currently my script is: #/bin/bash IFS=$'\n' for CUSTOMER in `cat exp.csv` do echo $CUSTOMER done

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  • JasperReports multi-page report with different content

    - by Han Fastolfe
    I'm evaluating JasperReport and iReport, a requirement is the possibility to produce a multiple page report in which every page contains a different report. Example: Page 1 contains an actual invoice for a customer Page 2 contains the invoices list for the customer Page 3 contains a graph of amount of invoices by year Page 4 contains only fixed text (say operator instructions ...) Is it possible to create such a unique report instead of creating four standalone report and then merge the pdfs. Thank a lot. Francesco

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  • How to repackage NVIDIA .run drivers into .deb with DKMS

    - by Delan Azabani
    At present, Ubuntu offers the 195.36.24 drivers as nvidia-current in their repository. This packaged driver is pretty cool as it uses DKMS so you don't have to keep reinstalling the driver after a new kernel version. The NVIDIA .run package drivers are at version 257 (beta) but they don't use DKMS so the graphics screws up every time a new kernel is installed and you don't reinstall the driver. How can I modify the .run to use DKMS and even better, package it as a deb package?

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  • Regex to Match White Space or End of String

    - by Kirk
    I'm trying to find every instance of @username in comment text and replace it with a link. Here's my PHP so far: $comment = preg_replace('/@(.+?)\s/', '<a href="/users/${1}/">@${1}</a> ', $comment); The only problem is the regex is dependent upon there being whitespace after the @username reference. Can anyone help me tweak this so it will also match if it is at the end of the string?

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  • How to let css selector exclude an element ?

    - by Tony
    For example I have a css style like this : input.validation-passed {border: 1px solid #00CC00; color : #000;} The javascript validation framework I use will inject every input tag with a class="validation-passed" .For the elements like <input type='text' /> ... , this is ok , but for <input type='button' /> , I want this is not applied , how should I do this ?

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  • Java HashSet<Integer> to int array

    - by jackweeden
    I've got a HashSet with a bunch of (you guessed it) integers in it. I want to turn it into an array, but calling hashset.toArray(); returns an array of Object type. This is fine, but is there a better way to cast it to an array of int, other than iterating through every element manually? A method I want to pass it to void doSomething(int[] arr) Won't accept the Object[] array, even if I try casting it like doSomething((int[]) hashSet.toArray());

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  • Psuedo LRU tree algorithm.

    - by patros
    A lot of descriptions of Pseudo LRU algorithms involve using a binary search tree, and setting flags to "point away" from the node you're searching for every time you access the tree. This leads to a reasonable approximation of LRU. However, it seems from the descriptions that all of the nodes deemed LRU would be leaf nodes. Is there a pseudo-LRU algorithm that deals with a static tree that will still perform reasonably well, while determining that non-leaf nodes are suitable LRU candidates?

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  • I get EXC_BAD_ACCESS when MaxConcurrentOperationCount > 1

    - by kudorgyozo
    Hello i am using NSOperationQueue to download images in the background. I have created a custom NSOperation to download the images. I put the images in table cells. The problem is if I do [operationQueue setMaxConcurrentOperationCount: 10] and i scroll down several cells the program crashes with EXC_BAD_ACCESS. Every time it crashes at the same place in the table. There are 3 cells one after the other which are for the same company and have the same logo so basically it should download the images 3 times. Every other time it works fine. - (void) main { NSAutoreleasePool * pool = [[NSAutoreleasePool alloc] init]; NSURL *url = [[NSURL alloc] initWithString:self.imageURL]; debugLog(@"downloading image: %@", self.imageURL); //NSError *error = nil; NSData *data = [[NSData alloc] initWithContentsOfURL:url]; [url release]; UIImage *image = [[UIImage alloc] initWithData:data]; [data release]; if (image) { if (image.size.width != ICONWIDTH && image.size.height != ICONHEIGHT) { UIImage *resizedImage; CGSize itemSize = CGSizeMake(ICONWIDTH, ICONHEIGHT); UIGraphicsBeginImageContext(itemSize); CGRect imageRect = CGRectMake(0.0, 0.0, itemSize.width, itemSize.height); [image drawInRect:imageRect]; resizedImage = UIGraphicsGetImageFromCurrentImageContext(); UIGraphicsEndImageContext(); self.theImage = resizedImage; } else { self.theImage = image; } [image release]; } [delegate didFinishDownloadingImage: self]; [pool release]; } This is how i handle downloading the images. If i comment out [delegate didFinishDownloadingImage: self]; in the function above it doesn't crash but of course it is useless. -(void) didFinishDownloadingImage:(ImageDownloadOperation *) imageDownloader { [self performSelectorOnMainThread: @selector(handleDidFinishDownloadingImage:) withObject: imageDownloader waitUntilDone: FALSE]; } -(void) handleDidFinishDownloadingImage:(ImageDownloadOperation *)imageDownloadOperation { NSArray *visiblePaths = [self.myTableView indexPathsForVisibleRows]; CompanyImgDownloaderState *stateObject = (CompanyImgDownloaderState *)[imageDownloadOperation stateObject]; if ([visiblePaths containsObject: stateObject.indexPath]) { //debugLog(@"didFinishDownloadingImage %@ %@", imageDownloader.theImage); UITableViewCell *cell = [self.myTableView cellForRowAtIndexPath: stateObject.indexPath]; UIImageView *imageView = (UIImageView *)[cell viewWithTag: 1]; if (imageDownloadOperation.theImage) { imageView.image = imageDownloadOperation.theImage; stateObject.company.icon = imageDownloadOperation.theImage; } else { imageView.image = [(TestWebServiceAppDelegate *)[[UIApplication sharedApplication] delegate] getCylexIcon]; stateObject.company.icon = [(TestWebServiceAppDelegate *)[[UIApplication sharedApplication] delegate] getCylexIcon]; } } }

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  • Regex not operator

    - by Erik Goens
    I need to use a regex to pull a value out a url domain that will exclude everything but the host (ex: wordpress) and domain type (ex .com). The urls are dynamic and contain 2-3 values for each result (www.example.com or example.org). I am trying to use this expression, but I am only getting back the first letter of every item I am attempting to exclude: Expresssion (?!wordpress|com|www)(\w+|\d+) String example.wordpress.com Results example ordpress om Desired Result example Any assistance would be greatly appreciated

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  • EJB3 Transaction Propogation

    - by Matt S.
    I have a stateless bean something like: @Stateless public class MyStatelessBean implements MyStatelessLocal, MyStatelessRemote { @PersistenceContext(unitName="myPC") private EntityManager mgr; @TransationAttribute(TransactionAttributeType.SUPPORTED) public void processObjects(List<Object> objs) { // this method just processes the data; no need for a transaction for(Object obj : objs) { this.process(obj); } } @TransationAttribute(TransactionAttributeType.REQUIRES_NEW) public void process(Object obj) { // do some work with obj that must be in the scope of a transaction this.mgr.merge(obj); // ... this.mgr.merge(obj); // ... this.mgr.flush(); } } The typically usage then is the client would call processObjects(...), which doesn't actually interact with the entity manager. It does what it needs to do and calls process(...) individually for each object to process. The duration of process(...) is relatively short, but processObjects(...) could take a very long time to run through everything. Therefore I don't want it to maintain an open transaction. I do need the individual process(...) operations to operate within their own transaction. This should be a new transaction for every call. Lastly I'd like to keep the option open for the client to call process(...) directly. I've tried a number of different transaction types: never, not supported, supported (on processObjects) and required, requires new (on process) but I get TransactionRequiredException every time merge() is called. I've been able to make it work by splitting up the methods into two different beans: @Stateless @TransationAttribute(TransactionAttributeType.NOT_SUPPORTED) public class MyStatelessBean1 implements MyStatelessLocal1, MyStatelessRemote1 { @EJB private MyStatelessBean2 myBean2; public void processObjects(List<Object> objs) { // this method just processes the data; no need for a transaction for(Object obj : objs) { this.myBean2.process(obj); } } } @Stateless public class MyStatelessBean2 implements MyStatelessLocal2, MyStatelessRemote2 { @PersistenceContext(unitName="myPC") private EntityManager mgr; @TransationAttribute(TransactionAttributeType.REQUIRES_NEW) public void process(Object obj) { // do some work with obj that must be in the scope of a transaction this.mgr.merge(obj); // ... this.mgr.merge(obj); // ... this.mgr.flush(); } } but I'm still curious if it's possible to accomplish this in one class. It looks to me like the transaction manager only operates at the bean level, even when individual methods are given more specific annotations. So if I mark one method in a way to prevent the transaction from starting calling other methods within that same instance will also not create a transaction, no matter how they're marked? I'm using JBoss Application Server 4.2.1.GA, but non-specific answers are welcome / preferred.

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  • is there a size limit to a text file?

    - by chicane
    HI All I am creating a log file for our website which will log every log-in by all the users to our orders area. I wish to know if you think its good to enter this log info in just one single file or should this be split up once the log file hits a certain size? My concern is that this file will get rather large over time, but im not certain of the size limit of a text file? thank you

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  • PHP real time chat with ajax polling

    - by xRobot
    I need to create a chat similar to facebook chat. I am thinking to use ajax polling ( to send request every 2-3 seconds ). Is this a good approach ? Or I need to use other server side languages like erlang and server-comet ?

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  • Java stuff you didn't know you didn't know

    - by pretzelstick
    What are some Java language features or Java related tools that you were embarrassed to find that you didn't know about? Examples for me are: jmap RuntimeException Please post things every Java programmer should know about, be they language features, tools, or facts about how the JVM works, but that you found out about long after you should have.

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  • defining asmx webservice class objects as static

    - by Usama Khalil
    Hi, is it better to declare Webservice class object instances as static as the .asmx webservice classes have only static methods. what i want is that i declare and instantiate webservice asmx class as static in aspx Page Behind Class. and on every event call on that page i could perform operation against webservice methods. is it beneficial in terms of performance? Thanks Usama

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  • Visual Studio 2008 Report Designer - can't turn on gridlines

    - by bob
    Microsoft in their infinite wisdom have seen fit to remove the useful "Draw Grid" and "Snap to Grid" checkboxes in the report properties dialog that were in VS 2005 but are not in VS 2008. I'm assuming they put that functionality elsewhere but I can't find it after going through what seems like every menu option available. Does anybody know how to turn on the gridlines?

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  • How to set an event for all cells in WPF Datagrid

    - by Natxo
    I need OnDragEnter event for every cell on my WPF Datagrid. I tried this : <ControlTemplate TargetType="{x:Type my:DataGridCell}" x:Key="RowTemplate"> <ContentPresenter DragEnter="ContentPresenter_DragEnter" > </ContentPresenter> </ControlTemplate> But doesn't seem to work. Any ideas people?

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  • iPhone Javascript execution time

    - by Rudiger
    Hi guys, In the Apple docs it says that JavaScript execution time is limited to 10 seconds for each top-level entry point. If your script executes for more than 10 seconds, Safari on iPhone OS stops executing the script at a random place I plan to have some Javascript run every 10 seconds or so that will do an AJAX query to the server and rewrite just the section of the page necessary. Will this be possible with these restrictions on the device?

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  • Java heap keeps on shrinking! What is happening in this graph of heap size?

    - by chillitom
    Hi Guys, This is a screen shot of a JVM (win64, 6u17) running ActiveMQ, after every garbage collection the heap size is reducing. As the heap size reduces garbage collection gets more frequent and the heap reduces more quickly. Eventually the VM locks up as it's spending all it's time in GC. -Xms is the default and -Xmx is 2048mb. What is happening!!? How can I avoid this? http://imagebin.org/92614 n.b originally posted on serverfault.com, moved to stackoverflow.com as requested

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  • Render public html's for dynamic banners in Rails ?

    - by benoror
    Hi, I would like to render specific HTML snippets for displaying banners, because each banner has a different nature (some images, some flash, etc). Every banner file is under app/public/banners/. I tried many ways, like: render :file => "/banners/somebanner.html" But it can't locate the file, because rails looks under app/views. Any Ideas ? Thanks! Missing template banners/somebanner.html in view path app/views

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