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  • UIDisplayLink stops updating when UIScrollView scrolled

    - by Tricky
    Title is quite self explanatory, but I have some animation being done in a loop triggered by UIDisplayLink. However, as soon as I scroll a UIScrollView I have added to my view hierarchy, the animation stops immediately, only to return again when scrolling has completely stopped and come to a standstill.... Anyway to cancel this behaviour?

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  • What helpful tactics have you employed to keep your development team on-track?

    - by Ed Altorfer
    I realize that this is a subjective question, so I've marked it as a community wiki. I think that it is pretty specific to programming teams, though, so I've posted it here as opposed to somewhere else. I'm leading a small game development team (four people) as a side project. We are a disjoint team, with everyone in different places, but we do have some of the mainstays of an organized team. Source Control Continuous Integration Bug Tracking Document Workspace Regular Meetings Calendar / Schedule How do you keep your small, disjoint teams on-track? I tend to agree with Joel's opinion about when and how to micromanage and know that my team is motivated, but it can be easy to fall off-course when everyone isn't connected in a physical way and doesn't see what other people on the team are doing. Suggestions, feedback, or criticisms are welcome! Edit: I'm managing the team; I'm not looking for automated tools or anything to do my job for me, just ideas for approach or process that might help everyone feel more "connected" and involved.

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  • touchesEnded Sound?

    - by NextRev
    I'm trying to play a sound on touchesEnded but I'm having a problem. There are multiple objects that get moved around, so if the below code holds true when any object is moved, it constantly plays the sound. How do I only play it once? -(void)touchesEnded:(NSSet *)touches withEvent:(UIEvent *)event{ if(CGRectContainsRect([image1 frame], [image2 frame])){ [self playsound]; } }

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  • (My)SQL performance: updating one field vs many unneccesary fields

    - by changokun
    i'm processing a form that has a lot of fields for a user who is editing an existing record. the user may have only changed one field, and i would typically do an update query that sets the values of all the fields, even though most of them don't change. i could do some sort of tracking to see which fields have actually changed, and only update the few that did. is there a performance difference between updating all fields in a record vs only the one that changed? are there other reasons to go with either method? the shotgun method is pretty easy...

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  • Duplicate a UITableViewCell - iPhone

    - by ncohen
    Hi everyone, I would like to create an effect to a cell of a UITableView. The effect is: duplicate the cell and move the duplicated cell (the original stays at its place). My problem is to duplicate the cell... I've tried: Code: UITableViewCell *animatedCell = [[UITableViewCell alloc] init]; animatedCell = [[self cellForRowAtIndexPath:indexPath] copy]; but UIView doesn't seem to implement the copy... How can I do it? Thanks

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  • networkActivityIndicatorVisible

    - by teo
    Hi, Is this code correct to use with the networkActivityIndicatorVisible? (void)viewWillAppear:(BOOL)animated { [super viewWillAppear:animated]; UIApplication* app2 = [UIApplication sharedApplication]; app2.networkActivityIndicatorVisible = YES; [self loadSources]; // Loads data in table view app2.networkActivityIndicatorVisible = NO; } Teo

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  • accessing view controller's view

    - by Mike
    I am inside a class on a view-based app, one that was creating with one view controller. WHen I am inside the view controller I can access its view using self.view, but how do I access the same view if I am inside a class? [[UIApplication sharedApplication] delegate]... //??? what do I put here? thanks

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  • NSOperation inside NSOperationQueue not being executed

    - by Martin Garcia
    I really need help here. I'm desperate at this point. I have NSOperation that when added to the NSOperationQueue is not being triggered. I added some logging to see the NSOperation status and this is the result: Queue operations count = 1 Queue isSuspended = 0 Operation isCancelled? = 0 Operation isConcurrent? = 0 Operation isFinished? = 0 Operation isExecuted? = 0 Operation isReady? = 1 Operation dependencies? = 0 The code is very simple. Nothing special. LoadingConflictEvents_iPad *loadingEvents = [[LoadingConflictEvents_iPad alloc] initWithNibName:@"LoadingConflictEvents_iPad" bundle:[NSBundle mainBundle]]; loadingEvents.modalPresentationStyle = UIModalPresentationFormSheet; loadingEvents.conflictOpDelegate = self; [self presentModalViewController:loadingEvents animated:NO]; [loadingEvents release]; ConflictEventOperation *operation = [[ConflictEventOperation alloc] initWithParameters:wiLr.formNumber pWI_ID:wiLr.wi_id]; [queue addOperation:operation]; NSLog(@"Queue operations count = %d",[queue operationCount]); NSLog(@"Queue isSuspended = %d",[queue isSuspended]); NSLog(@"Operation isCancelled? = %d",[operation isCancelled]); NSLog(@"Operation isConcurrent? = %d",[operation isConcurrent]); NSLog(@"Operation isFinished? = %d",[operation isFinished]); NSLog(@"Operation isExecuted? = %d",[operation isExecuting]); NSLog(@"Operation isReady? = %d",[operation isReady]); NSLog(@"Operation dependencies? = %d",[[operation dependencies] count]); [operation release]; Now my operation do many things on the main method, but the problem is never being called. The main is never executed. The most weird thing (believe me, I'm not crazy .. yet). If I put a break point in any NSLog line or in the creation of the operation the main method will be called and everything will work perfectly. This have been working fine for a long time. I have been making some changes recently and apparently something screw things up. One of those changes was to upgrade the device to iOS 5.1 SDK (iPad). To add something, I have the iPhone (iOS 5.1) version of this application that use the same NSOperation object. The difference is in the UI only, and everything works fine. Any help will be really appreciated. Regards,

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  • Is it possible to create ICriteria/ICriterion from LINQ or HQL?

    - by adrin
    I am creating a method that can create filter understood by NHibernate (by filter i mean a set of ICriteria object for example) from my abstract filter object. public static IEnumerable<ICriterion> ToNhCriteria(this MyCriteria criteria) { // T4 generated function // lots of result.Add(Expression.Or(Expression.Eq(),Expression.Eq)) expression trees - hard to generate // Is there a way to generate HQL/Linq query here istead? } then i want to do something like session.CreateCriteria<Entity>().Add(myCriteria.ToNhCriteria()) to filter entities. The problem is that using Expression. methods (Expression.Or etc) is quite tedious (the method is generated and i have multiple or statements that have to be joined into an expression somehow). Is there a way to avoid using Expression.Or() and create ICrietrion / ICriteria using LINQ or HQL?

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  • GWT removeHandler on first event notification

    - by Keith
    I want to remove a GWT event handler the first time I receive an event. I also want to avoid polluting my class with tracking registration objects that aren't really necessary. I currently have it coded as: final HandlerRegistration[] registrationRef = new HandlerRegistration[1]; registrationRef[0] = dialog.addFooHandler(new FooHandler() { public void onFoo(FooEvent event) { HandlerRegistration removeMe = registrationRef[0]; if(removeMe != null) { removeMe.removeHandler(); } // do stuff here } }); but the use of registrationRef makes the code less readable. Is there a better way to do this without adding variables to my class?

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  • Error -3 while decompressing data: incorrect header check

    - by Rahul99
    I have .zip file which contain csv data. I am reading .zip file using <input type = "file" name = "select_file"/> I want to decompress that .zip file and read csv data. file_data = self.request.get('select_file') file_str = zlib.decompress(file_data) #file_data_list = file_str.split('\n') #file_Reader = csv.reader(file_data_list,quoting=csv.QUOTE_NONE ) I am expecting csv data in file_str but I am getting error. error :: Error -3 while decompressing data: incorrect header check What I have to use?

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  • NHibernate cascade and inverse

    - by Kordonme
    I have three mappings as follows: public MainChapterMap() { // other properties HasMany(x => x.ClientSpecific).KeyColumn("MainChapterId"); } public MainChapterClientMap() { // other properties References(x => x.MainChapter).Column("MainChapterId"); HasMany(x => x.Details).KeyColumn("MainChapterClientId"); } public MainChapterClientDetailMap() { // other properties References(x => x.MainChapterClient).Column("MainChapterClientId"); } MainChapter has many client-specific chapters. The client-specific chapters (MainChapterClient) has many translations (MainChapterClientDetail) The dele rules should be as follow: When deleting a MainChapter Delete the MainChapterClient row Delete the MainChapterClientDetail row(s) When deleting a MainChapterClient Do NOT delete the MainChapter row Delete the MainChapterClientDetail row(s) When deleting a MainChapterClientDetail Do NOT delete the MainChapter row Do NOT delete the MainChapterClientDetail row(s) But I no matter what I end up getting this error: deleted object would be re-saved by cascade (remove deleted object from associations)[Entities.MainChapterClient#39] I'm not sure how to set up my cascades anymore. Any help are more than welcomed!

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  • External Javascript Timeout

    - by yummm
    I have a number of tracking scripts and web services installed on my website and I noticed when one of the services goes down, it still tries to call the external javascript file hosted on a different server. In Firefox, Chrome and other new browsers, there doesn't seem to be any issues when one of the services go down. However, in IE7 and IE8, my pages don't load all the way and time out before everything is displayed. Is there any way to add a time out on these javascript calls to prevent them from breaking my pages when they go down?

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  • UITabBarContrtoller achieve from a different class in iPhone

    - by baluedo
    Hi! I have the following problem: There is a class that includes five tabs in the following way: mainMenuClient.h #import <UIKit/UIKit.h> @interface MainMenuClient : UIViewController { UITabBarController *tabBarController; } @property (nonatomic, retain) UITabBarController *tabBarController; @end mainMenuClient.m -(void)viewDidLoad { UIView *contentView = [[UIView alloc] initWithFrame:[[UIScreen mainScreen] applicationFrame]]; contentView.backgroundColor = [UIColor blackColor]; self.view = contentView; [contentView release]; ContactListTab *contactTab = [[ContactListTab alloc] init]; ChatTab *chat = [[ChatTab alloc]init]; DialerTab *dialer = [[DialerTab alloc]init]; MenuTab *menu = [[MenuTab alloc]init]; TesztingFile *teszting = [[TesztingFile alloc]init]; contactTab.title = @"Contact List"; chat.title = @"Chat"; dialer.title = @"Dialer"; menu.title = @"Menu"; teszting.title = @"TesztTab"; contactTab.tabBarItem.image = [UIImage imageNamed:@"Contacts_icon.png"]; chat.tabBarItem.image = [UIImage imageNamed:@"Chat_icon.png"]; dialer.tabBarItem.image = [UIImage imageNamed:@"Dialer_icon.png"]; menu.tabBarItem.image = [UIImage imageNamed:@"Menu_icon.png"]; teszting.tabBarItem.image = [UIImage imageNamed:@"Contacts_icon.png"]; chat.tabBarItem.badgeValue = @"99"; tabBarController = [[UITabBarController alloc]init]; tabBarController.view.frame = CGRectMake(0, 0, 320, 460); [tabBarController setViewControllers:[NSArray arrayWithObjects:contactTab, chat, dialer, menu, teszting, nil]]; [contactTab release]; [chat release]; [dialer release]; [menu release]; [teszting release]; [self.view addSubview:tabBarController.view]; [super viewDidLoad]; } In the contactTab class there are a UITableViewController. contactTab.h - (void)updateCellData; - (void)configureCell:(UITableViewCell *)cell forIndexPath:(NSIndexPath *)indexPath; There is a third class, which I would like to achieve is a method of UITableViewController's (from ContactTab). So far I tried this: When I tried to achieve the UItabbarController: MainMenuClient *menu; UITabBarController *tabBarControllerchange = [[UITabBarController alloc] init]; tabBarControllerchange = menu.tabBarController; [tabBarControllerchange setSelectedIndex:0]; When I tried to achieve the UITableViewController: ContactListTab *contactListTab; [contactListTab updateCellData]; Does anybody have an idea for this problem? Thanks. Balazs.

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  • predicate subquery to return items by matching tags

    - by user3411663
    I have a many-to-many relationship between two entities; Item and Tag. I'm trying to create a predicate to take the selectedItem and return a ranking of items based on how many similar tags they have. So far I've tried: NSPredicate *predicate = [NSPredicate predicateWithFormat:@"SUBQUERY(itemToTag, $item, $item in %@).@count > 0", selectedItem.itemToTag]; Any other iterations that have failed. It currently only returns the selectedItem in the list. I've found little on Subquery. Is there a guru out there that can help me refine this? Thanks in advance for the help!

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  • Profile Image Update Twitter API

    - by jshollax
    I am trying to upload a profile image to twitter using their API. I found some good examples on the web on how to format the URLRequest, however I just can't seem to get this to work. Any help would be appreciated. The URL that I am using from Twitter API is http://twitter.com/account/update_profile_image.json -(void)uploadImageForAccount:(NSURL *)theURL intUserName:(NSString *)_userName initPassWord:(NSString *)_passWord image:(NSData *)image{ userName = [_userName retain]; passWord = [_passWord retain]; UIApplication *app = [UIApplication sharedApplication]; app.networkActivityIndicatorVisible = YES; requestedData = [[NSMutableData alloc] initWithLength:0]; NSMutableURLRequest *theRequest = [NSMutableURLRequest requestWithURL:theURL cachePolicy:NSURLRequestReloadIgnoringLocalCacheData timeoutInterval:60]; [theRequest setHTTPMethod:@"POST"]; NSString *stringBoundary = [NSString stringWithString:@"0xKhTmLbOuNdArY"]; NSString *contentType = [NSString stringWithFormat:@"multipart/form-data; boundary=%@", stringBoundary]; [theRequest addValue:contentType forHTTPHeaderField:@"Content-Type"]; // Credentials NSString *creds = [NSString stringWithFormat:@"%@:%@", userName, passWord]; [theRequest addValue:[NSString stringWithFormat:@"Basic %@",[self base64encode:creds]] forHTTPHeaderField:@"Authorization"]; NSMutableData *postBody = [NSMutableData data]; [postBody appendData:[[NSString stringWithFormat:@"\r\n\r\n--%@\r\n", stringBoundary] dataUsingEncoding:NSUTF8StringEncoding]]; [postBody appendData:[[NSString stringWithString:@"Content-Disposition: form-data; name=\"source\"\r\n\r\n"] dataUsingEncoding:NSUTF8StringEncoding]]; [postBody appendData:[[NSString stringWithString:@"canary"] dataUsingEncoding:NSUTF8StringEncoding]]; NSString *mimeType = mimeType = @"image/jpeg"; [postBody appendData:[[NSString stringWithFormat:@"\r\n--%@\r\n",stringBoundary] dataUsingEncoding:NSUTF8StringEncoding]]; [postBody appendData:[[NSString stringWithFormat:@"Content-Disposition: form-data; name=\"media\"; filename=\"%@\"\r\n", @"TNImage.jpeg"] dataUsingEncoding:NSUTF8StringEncoding]]; [postBody appendData:[[NSString stringWithFormat:@"Content-Type: %@\r\n", mimeType] dataUsingEncoding:NSUTF8StringEncoding]]; [postBody appendData:[[NSString stringWithString:@"Content-Transfer-Encoding: binary\r\n\r\n"] dataUsingEncoding:NSUTF8StringEncoding]]; [postBody appendData:image]; [postBody appendData:[[NSString stringWithFormat:@"\r\n--%@\r\n",stringBoundary] dataUsingEncoding:NSUTF8StringEncoding]]; [theRequest setHTTPBody:postBody]; NSURLConnection *connection = [[NSURLConnection alloc] initWithRequest:theRequest delegate:self startImmediately:YES]; if(DEBUG) NSLog(@"Connection = %@",[connection description]); if (connection == nil) { if(DEBUG) NSLog(@"Connection was Nil"); } }

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  • Hierarchical Data in MySQL is fast to retrieve?

    - by ajsie
    i've got a list of all countries - states - cities (- subcities/villages etc) in a XML file and to retrieve for example a state's all cities it's really quick with XML (using xml parser). i wonder, if i put all this information in mysql, is retrieving a state's all cities as fast as with XML? cause XML is designed to store hierarchical data while relational databases like mysql are not. the list contains like 500 000 entities. so i wonder if its as fast as XML using either of: Adjacency list model Nested Set model And which one should i use? Cause (theoretically) there could be unlimited levels under a state. And which is fastest for this huge dataset? Thanks!

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  • Artificial Intelligence in online game using Google App Engine

    - by Hortinstein
    I am currently in the planning stages of a game for google app engine, but cannot wrap my head around how I am going to handle AI. I intend to have persistant NPCs that will move about the map, but short of writing a program that generates the same XML requests I use to control player actions, than run it on another server I am stuck on how to do it. I have looked at the Task Queue feature, but due to long running processes not being an option on the App engine, I am a little stuck. I intend to run multiple server instances with 200+ persistant NPC entities that I will need to update. Most action is slowly roaming around based on player movements/concentrations, and attacking close range players...(you can probably guess the type of game im developing)

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  • Lxml or Xpath content print

    - by Angelo
    function= def parseTitle(self, post): """ Returns title string with spaces replaced by dots "" return post.xpath('h2')[0].text.replace('.', ' ') i would to see the content of post. Tried all . How can i properly debug the content. ir is an webstite of movies where i rip links and tittle. So this one should parse the title.and i am sure H@ is not existing , how to print/debug it?

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  • Desktop application validity

    - by Umesh
    I am creating a desktop application using AIR. In that application user is allowed to download some resources which have life span of 2 days. I am storing the date when the user is downloaded. But how can i check whether the date is passed 2 days or not? Right now I am checking with the current system date.But when the user changes the system date to back, it will start to work which i dont want. How the desktop applications say like flex builder and all having trial period.? How are they tracking the dates remaining? ~Umesh

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  • Copy NSAttributedString to pasteboard

    - by Chris
    Brand new to Cocoa and I'm trying to figure out how to copy an NSAttributedString to the pasteboard. I've looked in the docs and not sure if I'm supposed to use a NSPasteboardItem or not. Here's what I have to copy a regular NSString: NSPasteboard *pb = [NSPasteboard generalPasteboard]; NSArray *types = [NSArray arrayWithObjects:NSStringPboardType, nil]; [pb declareTypes:types owner:self]; [pb setString:@"asdfasdf" forType:NSStringPboardType]; How do I set a NSAttributedString? Thanks

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  • Managing EntityConnection lifetime

    - by kervin
    There have been many question on managing EntityContext lifetime, e.g. http://stackoverflow.com/questions/813457/instantiating-a-context-in-linq-to-entities I've come to the conclusion that the entity context should be considered a unit-of-work and therefore not reused. Great. But while doing some research for speeding up my database access, I ran into this blog post... Improving Entity Framework Performance The post argues that EFs poor performance compared to other frameworks is often due to the EntityConnection object being created each time a new EntityContext object is needed. To test this I manually created a static EntityConnection in Global.asax.cs Application_Start(). I then converted all my context using statements to using( MyObjContext currContext = new MyObjeContext(globalStaticEFConnection) { .... } This seems to have sped things up a bit without any errors so far as far as I can tell. But is this safe? Does using a applicationwide static EntityConnection introduce race conditions? Best regards, Kervin

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  • How to assign optional attribute of NSManagedObject in a NSManagedObjectModel having Three NSManaged

    - by Kundan
    I am using coredata framework. In my NSManagedObjectModel i am using three entities that are Class, Student and Score where class and student have one-to-many & inverse relationship and Student and Score have also inverse but one-one relationship. Score entity has all optional attributes and having default '0' decimalVaue, which is not assigned at the time new Student is added. But later i want to assign them score individually and also to particular attribute not all of score attributes in a go. I am able to create and add Students to particular Class but dont have any idea how to call particular student and assign them score. For example I want to assign Score'attribute "dribbling" [there are many attributes like "tackling"] a decimal value to Student "David" of Class "Soccer" ,how i can do that? Thanks in advance for any suggestion.

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  • Programmer tendency to preach [closed]

    - by Daniel
    I've run across several SO posts that come across as preachy or condescending. Do pedagogical programmers feel plagued by thoughtless questions? Or, do programmers count self-sufficiency such a virtue that any perceived lack of ambition merits scolding? These are some theories, admittedly negative ones. Can anyone offer some insight?

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