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  • Dispose Form opened in MainForm tab

    - by fireBand
    Hi, I have a MainForm which has tab Control and several independent form. I open each Individual From in the tab of the main form. A "Close Tab" button on the MainFrom closes the current tab, its implementation is below. This closes the current tab but what I also need is to dispose the From whose tab is closed but I am not sure how to get the instance of the form.' Any help is appreciated Thanks in Advance. 'Close the current tab Private Sub CloseCurrentTab() 'Close the current tab Dim tabPageSave As TabPage tabPageSave = tcDisplayDetails.SelectedTab tcDisplayDetails.TabPages.Remove(tabPageSave) End Sub

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  • Clojure - tail recursive sieve of Eratosthenes

    - by Konrad Garus
    I have this implementation of the sieve of Eratosthenes in Clojure: (defn sieve [n] (loop [last-tried 2 sift (range 2 (inc n))] (if (or (nil? last-tried) (> last-tried n)) sift (let [filtered (filter #(or (= % last-tried) (< 0 (rem % last-tried))) sift)] (let [next-to-try (first (filter #(> % last-tried) filtered))] (recur next-to-try filtered)))))) For larger n (like 20000) it ends with stack overflow. Why doesn't tail call elimination work here? How to fix it?

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  • NSTimer to fire while device is locked

    - by edie
    Hi, I'm currently creating an alarm. I use NSTimer to schedule my alarms. My problem is when the device was put into locked mode my NSTimer doesn't fire. I think that the NSTimer will not fire because my app goes to suspended state when it is lock. Can you help me find a solution to my problem? I've found some topics about UIBackgroundModes, but I don't know how it will help me. Thanks.. The problem in UILocalNotification is when the device was in silent, the sound will not be hear. My implementation was I'm using NSTimer to fire an alarm when the app is in foreground or device is locked but app currently running. When the applicationDidEnterBackground: is called I schedule the UILocalNotification as the alarm.

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  • How can I update an expression in a Runt::Schedule object?

    - by Reid Beels
    Runt provides a Schedule class for managing collections of events, each represented by a temporal expression. The Schedule class provides an update method, cited in the release notes as "allowing clients to update existing expressions". The implementation of this method, however, simply calls a supplied block, providing the temporal expression for the specified event (as shown). # From lib/runt/schedule.rb:61 # # Call the supplied block/Proc with the currently configured # TemporalExpression associated with the supplied Event. # def update(event,&block) block.call(@elems[event]) end How is one expected to use this method to update an expression?

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  • Do we need HyperJAXB generated hashCode & equals methods?

    - by Marcus
    We've generated some (well a lot) of classes using HyperJAXB. All of the classes implement Equals and HashCode and have the implementation style below. Appears this code is never executed.. is there any particular reason we need this code? I'm looking to simplify the classes if we can. public boolean equals(Object object) { if (!(object instanceof MyClass)) { return false; } if (this == object) { return true; } final EqualsBuilder equalsBuilder = new JAXBEqualsBuilder(); equals(object, equalsBuilder); return equalsBuilder.isEquals(); } public void hashCode(HashCodeBuilder hashCodeBuilder) { hashCodeBuilder.append(this.getValue()); hashCodeBuilder.append(this.getId()); } public int hashCode() { final HashCodeBuilder hashCodeBuilder = new JAXBHashCodeBuilder(); hashCode(hashCodeBuilder); return hashCodeBuilder.toHashCode(); }

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  • How to avoid having very large objects with Domain Driven Design

    - by Pablojim
    We are following Domain Driven Design for the implementation of a large website. However by putting the behaviour on the domain objects we are ending up with some very large classes. For example on our WebsiteUser object, we have many many methods - e.g. dealing with passwords, order history, refunds, customer segmentation. All of these methods are directly related to the user. Many of these methods delegate internally to other child object but this still results in some very large classes. I'm keen to avoid exposing lots of child objects e.g. user.getOrderHistory().getLatestOrder(). What other strategies can be used to avoid this problems?

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  • Concatenation Operator

    - by Chaitanya
    This might be a silly question but it struck me, and here i ask. <?php $x="Hi"; $y=" There"; $z = $x.$y; $a = "$x$y"; echo "$z"."<br />"."$a"; ?> $z uses the traditional concatenation operator provided by php and concatenates, conversely $a doesn't, My questions: by not using the concatenation operator, does it effect the performance? If it doesn't why at all have the concatenation operator. Why have 2 modes of implementation when one does the work?

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  • Is System.AddIn mostly about making it easier to use Remoting or does it make it harder to do so?

    - by MatthewMartin
    It takes at least 7 assemblies and restricting my AddIn's data model to data types that remoting can deal with before the appdomain isolation features begin to work. It is so complex! The System.AddIn teams blog implies to me they were trying to re-create a mental model of COM, a model I never understood very well in the first place and am not sold on the benefits. (If COM is so good why's it dead?-rhetorical question.) If I don't need to mirror or interop with legacy COM (like VSTO does using System.AddIn), is it possible to just create some classes that load load in a new AppDomain? I can write the discovery code my self, I've done it before and a naive implementation is pretty fast because I'm not like iterating over the assemblies in the GAC! So my specific question is, can I get the AppDomain isolation that AddIns provide with a few code Remoting snippets, and what would those be?

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  • How To create a Simple NDK Program in Android NDK

    - by Rakesh
    Hi I am new to android Programming and NDK.Yet i am not clear with working in NDK.I just downloaded android ndk r4.If i want to develop appln using NDK,and i refered http://marakana.com/forums/android/android_examples/49.html for reference,But still not clear how to create the header file and implementation,I did nt have any previuos exp in c language.And they asked for run javah tool to create the JNI header file. I dont know how to use javah tool,but i found it in java bin directory and i tried using cmd javah -jni com.pathname.classname is this correct syntax? if so i tried doing it in android bin directory.I want to know ,what classname represents,is this name of header file class that i try to create Regards Rakesh Shankar.P

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  • WCF Service Library Reference in a Web Form (asp.net)

    - by Abu Hamzah
    i am not sure if this is the correct way of doing but i read that you not suppose to have a WCF Service Library reference in your web form project rather you add endpoints to your web.config, is that true? here is what i have done: 1) create a WCF service library project 2) create a simple service called "MyService.svc" WebForm: 1) Create a web project 2) create a WCF Service and in it i have this code <%@ ServiceHost Language="C#" Service="WCFJQuery.ContactBLL.Implementation.ContactUs" Factory="System.ServiceModel.Activation.WebScriptServiceHostFactory" %> 3) right click on the web proejct and "Add Reference" and add teh MyService.dll reference from WCF service library project. is this something how you suppose to do?

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  • What should I call the operation that limit a string's length?

    - by egarcia
    This is a language-agnostic question - unless you count English as a language. I've got this list of items which can have very long names. For aesthetic purposes, these names must be made shorter in some cases, adding dots (...) to indicate that the name is longer. So for example, if article.name returns this: lorem ipsum dolor sit amet I'd like to get this other output. lorem ipsum dolor ... I can program this quite easily. My question is: how should I call that shortening operation? I mean the name, not the implementation. Is there a standard English name for it?

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  • __getattr__ on a module

    - by Matt Joiner
    How can implement the equivalent of a __getattr__ on a class, on a module? Example When calling a function that does not exist in a module's statically defined attributes, I wish to create an instance of a class in that module, and invoke the method on it with the same name as failed in the attribute lookup on the module. class A(object): def salutation(self, accusative): print "hello", accusative def __getattr__(mod, name): return getattr(A(), name) if __name__ == "__main__": salutation("world") Which gives: matt@stanley:~/Desktop$ python getattrmod.py Traceback (most recent call last): File "getattrmod.py", line 9, in <module> salutation("world") NameError: name 'salutation' is not defined Evidently something is not right about my assumed implementation.

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  • Position of least significant bit that is set

    - by peterchen
    I am looking for an efficient way to determine the position of the least significant bit that is set in an integer, e.g. for 0x0FF0 it would be 4. A trivial implementation is this: unsigned GetLowestBitPos(unsigned value) { assert(value != 0); // handled separately unsigned pos = 0; while (!(value & 1)) { value >>= 1; ++pos; } return pos; } Any ideas how to squeeze some cycles out of it? (Note: this question is for people that enjoy such things, not for people to tell me xyzoptimization is evil.) [edit] Thanks everyone for the ideas! I've learnt a few other things, too. Cool!

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  • UINavigationController (drawRect:)

    - by ludo
    Hi, I created an application with a TabBarController, 4 TabBarItems and every TabBarItem have is own NavigationController file (everything created in IB). I'm using the drawRect function to design my navigationBar: @implementation UINavigationBar (customImage) -(void)drawRect:(CGRect)rect { UIImage *image = [UIImage imageNamed:@"MyImage.png"]; [image drawInRect:CGRectMake(0,0, self.frame.size.width,self.frame.size.height)]; } @end The problem is that the NavigationBar change for every ViewController inside my app, what I want is only draw the NavigationBar for one TabBarItem only and use the default navigationBar for other controller. How to do that? Thanks,

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  • Can I partition the C# System.Threading.ThreadPool?

    - by Drew Shafer
    I love ThreadPool. It makes my life better. However, my love may have quietly turned into an abusive relationship that I need to escape from, so I need some advice from my SO brothers (and presumably sisters, although I haven't seen any actual evidence of that yet). My basic problem is that I have several different libraries that are all using the threadpool in an uncoordinated way, and running out of threads is a possibility. I was hoping there was some way I could partition the ThreadPool up so I could give a certain class 1 thread, another 20 threads, another 5 threads, and so on. I know I could write my own ThreadPool implementation. I don't want to do that, because I'm lazy. So, is there a simple solution already out there? Currently I'm constrained to using the 3.5 CLR. I know a lot of this stuff becomes easier in 4.0.

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  • Grails GORM on multiple Forms

    - by Fabien Barbier
    Usually I'm using One-to-many relationship by this way : class Subject { static hasMany = [ crfs : Crf ] String name ... } class Crf { String title String info ... } I can extend this relationship to others domains, Ex : static hasMany = [ crfs : Crf, crfb : CrfBlood ...] But in my case I have to link the Subject domain to 30 others domains, maybe more...(ex : CrfBlood, CrfMedical, crfFamily, etc...). What domain model implementation should I use in my case ? I would like to keep the dynamic finders usability in my project.

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  • Phantom updates due to decimal precision on calculated properties

    - by Jamie Ide
    This article describes my problem. I have several properties that are calculated. These are typed as decimal(9,2) in SQL Server and decimal in my C# classes. An example of the problem is: Object is loaded with a property value of 14.9 A calculation is performed and the property value is changed to 14.90393 When the session is flushed, NHibernate issues an update because the property is dirty Since the database field is decimal (9,2) the stored value doesn't change Basically a phantom update is issued every time this object is loaded. I don't want to truncate the calculations in my business objects because that tightly couples them to the database and I don't want to lose the precision in other calculations. I tried setting scale and precision or CustomType("Decimal(9,2)") in the mapping file but this appears to only affect schema generation. My only reasonable option appears to be creating an IUserType implementation to handle this. Is there a better solution?

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  • "Expected specifier-quantifier-list before b2Body" error in XCode

    - by Zeophlite
    I'm trying to derive class from CCSprite to store the sprites reference to its corresponding b2Body, but I've get the following errors (comments in Code) BoxSprite.h #import <Foundation/Foundation.h> #import "Box2D.h" #import "cocos2d.h" @interface BoxSprite : CCSprite { b2Body* bod; // Expected specifier-quantifier-list before b2Body } @property (nonatomic, retain) b2Body* bod; // Expected specifier-quantifier-list before b2Body @end // Property 'bod' with 'retain' attribute must be of object type BoxSprite.m #import "BoxSprite.h" @implementation BoxSprite @synthesize bod; // No declaration of property 'bod' found in the interface - (void) dealloc { [bod release]; // 'bod' undeclared [super dealloc]; } @end I was hoping to create the sprite and assign the body with: BoxSprite *sprite = [BoxSprite spriteWithBatchNode:batch rect:CGRectMake(32 * idx,32 * idy,32,32)]; ... sprite->bod = body; // Instance variable 'bod' is declared protected Then access the b2Body by: if ([node isKindOfClass:[BoxSprite class]]) { BoxSprite *spr = (BoxSprite*)node; b2Body *body = spr->bod; // Instance variable 'bod' is declared protected ... }

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  • Problem with XML parser

    - by zp26
    Hi, I have a problem with parsing XML. I have created a program which write a file xml in the project directory. The file XML are correct. (i checked). When i try to read this XML the program crash and return 1 status. I have controlled my 2 path and they are equals. Can you help me please? Thanks so much. #import "PositionIdentifierViewController.h" #import "WriterXML.h" @implementation PositionIdentifierViewController - (void)parser:(NSXMLParser *)parser foundCharacters:(NSString *)string { NSString *stringa = [NSString stringWithFormat:@"%@",string]; textArea.text = [textArea.text stringByAppendingString:@"\n"]; textArea.text = [textArea.text stringByAppendingString:stringa]; } -(IBAction)startParsing { NSURL *xmlURL = [NSURL fileURLWithPath:path]; NSXMLParser *parser = [[NSXMLParser alloc] initWithContentsOfURL:xmlURL]; [parser setDelegate:self]; BOOL success = [parser parse]; if(success == YES){ // } [parser release]; } // Implement viewDidLoad to do additional setup after loading the view, typically from a nib. - (void)viewDidLoad { [super viewDidLoad]; NSArray *tempPaths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES); NSString *documentsDirectoryPath = [tempPaths objectAtIndex:0]; path = [documentsDirectoryPath stringByAppendingPathComponent:@"filePosizioni.xml"]; WriterXML *newWriter; newWriter = [[WriterXML alloc]init]; [newWriter saveXML:(NSString*)@"ciao":(float)10:(float)40:(float)70]; [newWriter saveXML:(NSString*)@"pippo":(float)20:(float)50:(float)80]; [newWriter saveXML:(NSString*)@"pluto":(float)30:(float)60:(float)90]; NSLog(path); } - (void)didReceiveMemoryWarning { // Releases the view if it doesn't have a superview. [super didReceiveMemoryWarning]; // Release any cached data, images, etc that aren't in use. } - (void)viewDidUnload { // Release any retained subviews of the main view. // e.g. self.myOutlet = nil; } - (void)dealloc { [super dealloc]; } @end #import "WriterXML.h" @implementation WriterXML -(void)saveXML:(NSString*)name:(float)x:(float)y:(float)z{ NSArray *paths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES); NSString *documentsDirectoryPath = [paths objectAtIndex:0]; NSString *filePath = [documentsDirectoryPath stringByAppendingPathComponent:@"filePosizioni.xml"]; NSFileHandle *myHandle; NSFileManager *fileManager = [NSFileManager defaultManager]; NSString *titoloXML = [NSString stringWithFormat:@"<?xml version=1.0 encoding=UTF-8 ?>"]; NSString *inizioTag = [NSString stringWithFormat:@"\n\n\n<position>"]; NSString *tagName = [NSString stringWithFormat:@"\n <name>%@</name>", name]; NSString *tagX = [NSString stringWithFormat:@"\n <x>%f</x>", x]; NSString *tagY = [NSString stringWithFormat:@"\n <y>%f</y>", y]; NSString *tagZ = [NSString stringWithFormat:@"\n <z>%f</z>", z]; NSString *fineTag= [NSString stringWithFormat:@"\n</position>"]; NSData* dataTitoloXML = [titoloXML dataUsingEncoding: NSASCIIStringEncoding]; NSData* dataInizioTag = [inizioTag dataUsingEncoding: NSASCIIStringEncoding]; NSData* dataName = [tagName dataUsingEncoding: NSASCIIStringEncoding]; NSData* dataX = [tagX dataUsingEncoding: NSASCIIStringEncoding]; NSData* dataY = [tagY dataUsingEncoding: NSASCIIStringEncoding]; NSData* dataZ = [tagZ dataUsingEncoding: NSASCIIStringEncoding]; NSData* dataFineTag = [fineTag dataUsingEncoding: NSASCIIStringEncoding]; if(![fileManager fileExistsAtPath:filePath]) [fileManager createFileAtPath:filePath contents:dataTitoloXML attributes:nil]; myHandle = [NSFileHandle fileHandleForUpdatingAtPath:filePath]; [myHandle seekToEndOfFile]; [myHandle writeData:dataInizioTag]; NSLog(@"writeok"); [myHandle seekToEndOfFile]; [myHandle writeData:dataName]; NSLog(@"writeok"); [myHandle seekToEndOfFile]; [myHandle writeData:dataX]; NSLog(@"writeok"); [myHandle seekToEndOfFile]; [myHandle writeData:dataY]; NSLog(@"writeok"); [myHandle seekToEndOfFile]; [myHandle writeData:dataZ]; NSLog(@"writeok"); [myHandle seekToEndOfFile]; [myHandle writeData:dataFineTag]; NSLog(@"writeok"); [myHandle seekToEndOfFile]; NSLog(@"zp26 %@",filePath); } @end

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  • Can a Domain Specific Language (DSL) be localized?

    - by michielvoo
    I have never written a DSL, but I am considering it as a feature for a new project (hypothetical). It would be for end users to be able to express in natural language concepts such as weekdays between 10 and 11 except on the first monday of the month. Dutch users might write weekdagen tussen 10 en 11 behalve op de eerste maandag van de maand. In this case the position of the words seems to match, but there may be expressions where the position of verbs/nouns etc. could be different between languages. I realise the obvious answer (it depends). I am a .NET developer and I consider using Boo but I'm open to suggestions. I need to understand wether each translation requires rewriting a part of the implementation (which part) or if there is a way to do actual translations, maybe in some sort of preprocessor. Thanks!

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  • XCode project complains about missing files if a linked framework contains private headers

    - by darklight
    My Problem is this: My framework contains public and private headers - the public headers import private headers in the framework My app that links against this framework imports public headers Now when I compile it, XCode complains about missing files (the private headers that are indirectly imported via the frameworks public headers). I read somewhere on stackoverflow that I should do this: "In the public header file use @class to include other interfaces and use #import in the implementation file (.m)." I find this solution pretty unsatisfying - you have to use it for circular dependencies, too. Is there any better way to keep my headers private?

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  • How to prevent a modal UIImagePickerController from rotating?

    - by coneybeare
    I have an app that fully support rotation. I am modally adding a UIImagePickerController for which there is no support for UIInterfaceOrientationLandscape and I cannot get the controller to stay in portrait. In other words, I need to disable rotation for the UIImagePickerController so it stays in portrait, without removing rotation for the rest of my app. this seems basic, but I can't seem to locate it. How can I prevent this rotation? UPDATE As suggested, I tried subclassing with the following code: @interface UAImagePickerController : UIImagePickerController { } @end @implementation UAImagePickerController - (BOOL)shouldAutorotateToInterfaceOrientation:(UIInterfaceOrientation)toInterfaceOrientation { return UIDeviceOrientationIsPortrait(toInterfaceOrientation); } @end The line is not being hit at all with a breakpoint… i think there must be something funky about the UIImagePickerView

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  • Need Help With Simple Counting Bug in iPhone SDK

    - by seanny94
    So I'm basically making an app that adds a count to a number and then displays it each time you tap the button. However, the first tap issued doesn't take any action but adds one (just as planned) on the second tap. I've searched to the ends of the earth looking for the solution with no luck, so I'll see what you guys can make of this. :) #import "MainView.h" @implementation MainView int count = 0; -(void)awakeFromNib { counter.text = @"0"; } - (IBAction)addUnit { if(count >= 999) return; NSString *numValue = [[NSString alloc] initWithFormat:@"%d", count++]; counter.text = numValue; [numValue release]; } - (IBAction)subtractUnit { if(count <= 0) return; NSString *numValue = [[NSString alloc] initWithFormat:@"%d", count--]; counter.text = numValue; [numValue release]; } @end

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  • Database connection management in Spring

    - by ria
    Do we have to explicitly manage database resources when using Spring Framework.. liking closing all open connections etc? I have read that Spring relieves developer from such boiler plate coding... This is to answer an error that I am getting in a Spring web app: org.springframework.jdbc.CannotGetJdbcConnectionException: Could not get JDBC Connection; nested exception is java.sql.SQLException: ORA-00020: maximum number of processes (150) exceeded The jdbcTemplate is configured in the xml file and the DAO implementation has reference to this jdbcTemplate bean which is used to query the database.

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  • Using Interfaces in action signature

    - by Dmitry Borovsky
    Hello, I want to use interface in Action signature. So I've tried make own ModelBinder by deriving DefaultModelBinder: public class InterfaceBinder<T> : DefaultModelBinder where T: new() { protected override object CreateModel(ControllerContext controllerContext, ModelBindingContext bindingContext, Type modelType) { return base.CreateModel(controllerContext, bindingContext, typeof(T)); } } public interface IFoo { string Data { get; set; } } public class Foo: IFoo /*other interfaces*/ { /* a lot of */ public string Data { get; set; } } public class MegaController: Controller { public ActionResult Process( [ModelBinder(typeof(InterfaceBinder))]IFoo foo){/bla-bla-bla/} } But it doesn't work. Does anybody have idea how release this behaviour? And yes, I know that I can make my own implementation of IModelBinder, but I'm looking for easier way.

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