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  • The "correct" way to define an exception in Python without PyLint complaining

    - by Evgeny
    I'm trying to define my own (very simple) exception class in Python 2.6, but no matter how I do it I get some warning. First, the simplest way: class MyException(Exception): pass This works, but prints out a warning at runtime: DeprecationWarning: BaseException.message has been deprecated as of Python 2.6 OK, so that's not the way. I then tried: class MyException(Exception): def __init__(self, message): self.message = message This also works, but PyLint reports a warning: W0231: MyException.__init__: __init__ method from base class 'Exception' is not called. So I tried calling it: class MyException(Exception): def __init__(self, message): super(Exception, self).__init__(message) self.message = message This works, too! But now PyLint reports an error: E1003: MyException.__init__: Bad first argument 'Exception' given to super class How the hell do I do such a simple thing without any warnings?

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  • UIWebView in multithread ViewController

    - by Tao
    I have a UIWebView in a viewcontroller, which has two methods as below. The question is if I pop out(tap back on navigation bar) this controller before the second thread is done, the app will crash after [super dealloc], because "Tried to obtain the web lock from a thread other than the main thread or the web thread. This may be a result of calling to UIKit from a secondary thread.". Any help would be really appreciated. -(void)viewDidAppear:(BOOL)animated { [super viewWillAppear:animated]; NSInvocationOperation *operation = [[NSInvocationOperation alloc] initWithTarget:self selector:@selector(load) object:nil]; [operationQueue addOperation:operation]; [operation release]; } -(void)load { [NSThread sleepForTimeInterval:5]; [self performSelectorOnMainThread:@selector(done) withObject:nil waitUntilDone:NO]; }

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  • How to force asp.net GridView control to wrap first row within <thead> </thead> tags

    - by burak ozdogan
    Hi, I want to use Christian Bach's tableSorter client-side table sorting jQuery plugin with my asp.Net GridView control. But the problem is, in the documentation it writes: tablesorter works on standard HTML tables. You must include THEAD and TBODY tags: And unfortunately asp.net renders my GridView only with tags and header row stays within as the 1st row. I have tried: dgvRate.HeaderRow.TableSection = TableRowSection.TableHeader; after calling .DataBind(); It only helped to have <TH></TH> within the header . But still everything is inside <tbody> Can I accomplish this, I mean moving my 1st row from <tbody></tbody> to <thead></thead> ? I do not want to add it manually on PreRender stage; I am sure this could be handled much simpler, isn't it? thanks

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  • How to use a class's type as the type argument for an inherited collection property in C#

    - by Edelweiss Peimann
    I am trying to create a representation of various types of card that inherit from a generic card class and which all contain references to their owning decks. I tried re-declaring them, as suggested here, but it still won't convert to the specific card type. The code I currently have is as such: public class Deck<T> : List<T> where T : Card { void Shuffle() { throw new NotImplementedException("Shuffle not yet implemented."); } } public class Card { public Deck<Card> OwningDeck { get; set; } } public class FooCard : Card { public Deck<FooCard> OwningDeck { get { return (Deck<FooCard>)base.OwningDeck; } set { OwningDeck = value; } } } The compile-time error I am getting: Error 2 Cannot convert type 'Game.Cards.Deck' to 'Game.Cards.Deck' And a warning suggesting I use a new operator to specify that the hiding is intentional. Would doing so be a violation of convention? Is there a better way? My question to stackoverflow is this: Can what I am trying to do be done elegantly in the .NET type system? If so, can some examples be provided?

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  • call my web services from other app with javascript?

    - by Dejan.S
    Hi. I got .asmx a web service on my app. I need to call a method from an other app to get statistics from my app. I need it to return XML. the call to the webmethod is done with javascript soap. There is a default hellow world webmethod and calling that work but it seem that when i try to call a method where i need to pass parameters and it need to execute code it wont work and just return my error message. any ideas on what can be wrong. am I using the wrong web method?

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  • Code igniter authentication code in controller security question

    - by Prime Studios
    I have a main controller to handle the very front-end of my authentication system, it handles login, logout, update user info, etc. functions that I anticipate calling by POST'ing from views/forms. What about something like a "delete_user" function though? My thoughts are a button in someones admin panel would say "Delete Account" and it would post to "/auth/delete", and the function would delete the user based on their session username or id. This seems a bit open ended, you could send out a link to someone and when they opened it while in that application it would delete their account.. Whats the best way to handle this?

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  • In an Android test, how to check that a View is shown?

    - by Jan Zankowski
    Hello, I'm writing a UI test case (using ActivityUnitTestCase) and would like to check if at a given time a View subclass is visible to the user. I've found the View#isShown() method, which claims to do exactly this - checking the visibility field of this element and all its parents - but somehow it always returns "false" for all the elements. I'll be grateful for some help. If it makes it easier, I can paste some code. Also, I found ViewAsserts#assertOnScreen(View origin, View view) but it doesn't seem to do the right thing either - always returns true. Am I perhaps calling it wrong: assertOnScreen(viewImTesting.getRootView(), viewImTesting)? Thanks, Jan

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  • MPXJ in .NET converting java Date to .NET DateTime

    - by Jeff
    I'm using the MPXJ library in .NET for parsing MS Project (MPP) files, and it's working great. The one issue I'm having is trying to translate the task Start and Finish date into .NET DateTime to use with my data models. I am going through all the tasks and calling task.getFinish() and task.getStart() that both return javva.util.Date objects. When I use task.getFinish().getYear(), task.getFinish().getMonth(), etc. to build up a new DateTime object it warns me that they are obsolete. What is the best way to get the start and finish dates from MPXJ into a .NET DateTime object? Thanks.

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  • setting actionscript 3 superclass variables

    - by jedierikb
    In AS3, if I have a class such: public class dude { //default value for a dude protected var _strength:Number = 1; public function dude( ):void { super( ); //todo... calculate abilities of a dude based on his strength. } } and a subclass public class superDude extends dude { public function superDude( ):void { _strength = 100; super( ); trace( "strength of superDude: " + _strength ); } } This will trace strength of superDude is 1. I expected the variable I set in the subclass (prior to calling the superclass constructor) to remain. Is there a way to assign class variables in subclass constructors which are not over-written by the superclass construtor? Or should I pass them up as constructor variables?

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  • Is there a way to access the locale used by gettext under windows ?

    - by phtrivier
    I have a program where i18n is handled by gettext. The program works fine, however for some reason I need to know the name of the locale used by gettext at runtime (something like 'fr_FR') under win32. I looked into gettext sources, and there is a quite frightening function that computes it on all platforms (gl_locale_name, in a C file called "localename.h/c"). However, this file does not seem to be installed alongside gettext or libintl, so I can't seem to call the function. Is there another function provided by gettext to get this value ? Or in another package (boost, glib, anything ?) (On a related note, there is a thing called std::locale in the C++ standard library, and according to the doc calling std::locale("") should create a locale with the settings of the system, unless I am mistaken ... but then the name is 'C' under windows. Is it a viable way of getting the locale name ? What I am doing wrong ?)

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  • Should I use custom exceptions to control the flow of application?

    - by bonefisher
    Is it a good practise to use custom business exceptions (e.g. BusinessRuleViolationException) to control the flow of user-errors/user-incorrect-inputs??? The classic approach: I have a web service, where I have 2 methods, one is the 'checker' (UsernameAlreadyExists()) and the other one is 'creator' (CreateUsername())... So if I want to create a username, I have to do 2 roundtrips to webservice, 1.check, 2.if check is OK, create. What about using UsernameAlreadyExistsException? So I call only the 2. web service method (CrateUsername()), which contains the check and if not successfull, it throws the UsernameAlreadyExistsException. So the end goal is to have only one round trip to web service and the checking can be contained also in other web service methods (so I avoid calling the UsernameAlreadyExists() all the times..). Furthermore I can use this kind of business error handling with other web service calls completely avoiding the checking prior the call.

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  • How are Flash library symbols constructed? Why are width/height already available in constructor?

    - by Triynko
    Suppose I draw a square on the stage, convert it to a symbol, export it for ActionScript with a classname of "MySquare" (and of course a base class of MovieClip). How is it that in the MySquare constructor, the width and height of this MovieClip are already available? In fact, any named instances in the clip are also available. I'm confused about how the Flash player seems to be able to pre-construct my movie clip by populating its properties and child clips before my constructor for the class ever runs. I thought that it would have to first construct the clip, calling my constructor code, and then construct and add any children, but obviously the player is doing something special for clips designed in the Flash authoring environment.

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  • Python New-style Classes and the Super Function

    - by sfjedi
    This is not the result I expect to see: class A(dict): def __init__(self, *args, **kwargs): self['args'] = args self['kwargs'] = kwargs class B(A): def __init__(self, *args, **kwargs): super(B, self).__init__(args, kwargs) print 'Instance A:', A('monkey', banana=True) #Instance A: {'args': ('monkey',), 'kwargs': {'banana': True}} print 'Instance B:', B('monkey', banana=True) #Instance B: {'args': (('monkey',), {'banana': True}), 'kwargs': {}} I'm just trying to get classes A and B to have consistent values set. I'm not sure why the kwargs are being inserted into the args, but I'm to presume I am either calling init() wrong from the subclass or I'm trying to do something that you just can't do. Any tips?

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  • Session Logout in every two minutes.

    - by Pankaj Mishra
    I have Web Application in asp.net. Where I am maintaining Session for every User. And every Time I got logout in Approx 2 min. I tried to increase this time through web Config File upto 60 min but it is not working For me and I m getting same problem. I have created A class file For maintaining session.I am Using This Code. public static void createSession(System.Web.SessionState.HttpSessionState session) { Session = session; } This is my class file code. And I am calling this function in login Page load like this. BusinessClasses.SessionHandler.createSession(Page.Session); Then After I am Checking In everyPage. But this code is not working for me. Please Give Suggest me correct solution for this problem.

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  • DDE Server Windows:orcascr9.exe: Application Error

    - by Critical Skill
    Hello I've looked at the queries on SO that pertain to similar errors - but haven't found anything so far, to help with this particular problem I am having with an orcascript which I am running under Powerbuilder9.0. The orca script connects to an SCC service provider, does a full target refresh, and then is supposed to build the exe. It never gets to the last step though. The log is not very informative and simply says this at the point of failure: PBORCA_SccRefreshTarget. Full Rebuild Calling cm_rebuild_application(CM_REBUILD_FULL) While the script is at some way into this above step, it exits and throws up the DDE server error. Can someone help me figure this one out? I just barely know the basics of PB, and the intent of this exercise is to convert an IDE-based build that I inherited, into an orcascript build so that i can run the build unmonitored. Thanks in advance!

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  • Differentiate generic methods by type parameters only using reflection?

    - by Brian Vallelunga
    I'm trying to use reflection to get a specific MethodInfo of a class, but am unsure how to differentiate between the two following methods: public class Test { public IBar<T1> Foo<T1>(); public IBar<T1, T2> Foo<T1, T2>(); } How can I get a reference to the different Foo methods, assuming I know the number of type parameters? Just calling typeof(Test).GetMethod("Foo") will throw an exception that the method name is ambiguous and there aren't a differing number of parameters to check.

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  • How do I change the default format of log messages in python app engine?

    - by dazed-n-confused
    I would like to log the module and classname by default in log messages from my request handlers. The usual way to do this seems to be to set a custom format string by calling logging.basicConfig, but this can only be called once and has already been called by the time my code runs. Another method is to create a new log Handler which can be passed a new log Formatter, but this doesn't seem right as I want to use the existing log handler that App Engine has installed. What is the right way to have extra information added to all log messages in python App Engine, but otherwise use the existing log format and sink?

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  • Graceful DOS Command Error-Handling w/PHP popen()

    - by Captain Obvious
    PHP 5.2.13 on Windows 2003 I am using the DOS Start /B command to launch a background application using the PHP popen() function: popen("start /B {$_SERVER['HOMEPATH']}/{$app}.exe > {$_SERVER['HOMEPATH']}/bg_output.log 2>&1 & echo $!", 'r'); The popen() function launches a cmd.exe process that runs the specified command; however, if the command fails (e.g. the {$app}.exe doesn't exist or is locked in the above example), the cmd.exe process never returns, and PHP hangs indefinitely as a result. Calling the failing DOS command directly using the Command Prompt results in an Error prompt that requires clicking the OK button. I assume this error confirmation requirement is what's preventing the cmd.exe process from returning to PHP both from the Command Prompt (using both CGI and CLI) and the web (using Apache 2.0 handler w/Apache 2.2). Is there a way to configure PHP, Apache, and/or Win 2003 to return the DOS error to the originating call rather than waiting for confirmation?

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  • C# simpler run time generics

    - by Hellfrost
    Is there a way to invoke a generic function with a type known only at run time? I'm trying to do something like: static void bar() { object b = 6; string c = foo<typeof(b)>(); } static string foo<T>() { return typeof (T).Name; } Basically I want to decide on the type parameter only at run time, but the function I'm calling depends on the type parameter. Also I know this can be done with reflections... but it's not the nicest solution to the problem... I'm sort of looking for dynamic features in C#...

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  • VB.net WebBrowser and AJAX List Options

    - by Vinsick
    I'm writing a VB.net program for a website that uses the AJAX Lits options http://www.ajaxdaddy.com/demo-dhtml-autocomplete.html Whats more is that the website has used additional arguments in the function that i'm not exactly sure what they are calling, and there a trigger that executes an action that must be click, tabbing and returning fail. Any idea on how to automate this? This website has been a holy terror since it was unleashed on my company. I've tried this: Dim ObjArr(4) As Object ObjArr(0) = CObj("prac_select") ObjArr(1) = CObj("'getCountriesByLetters'") ObjArr(2) = CObj("1") ObjArr(3) = CObj("'prac_name'") ObjArr(4) = CObj("'practice'") WebBrowser1.Document.InvokeScript("ajax_showOptions", ObjArr)

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  • Why does Color.IsNamedColor not work when I create a color using Color.FromArgb()?

    - by Jon B
    In my app I allow the user to build a color, and then show him the name or value of the color later on. If the user picks red (full red, not red-ish), I want to show him "red". If he picks some strange color, then the hex value would be just fine. Here's sample code that demonstrates the problem: static string GetName(int r, int g, int b) { Color c = Color.FromArgb(r, g, b); // Note that specifying a = 255 doesn't make a difference if (c.IsNamedColor) { return c.Name; } else { // return hex value } } Even with very obvious colors like red IsNamedColor never returns true. Looking at the ARGB values for my color and Color.Red, I see no difference. However, calling Color.Red.GetHashCode() returns a different hash code than Color.FromArgb(255, 0, 0).GetHashCode(). How can I create a color using user specified RGB values and have the Name property come out right?

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  • Why C++ virtual function defined in header may not be compiled and linked in vtable?

    - by 0xDEAD BEEF
    Situation is following. I have shared library, which contains class definition - QueueClass : IClassInterface { virtual void LOL() { do some magic} } My shared library initialize class member QueueClass *globalMember = new QueueClass(); My share library export C function which returns pointer to globalMember - void * getGlobalMember(void) { return globalMember;} My application uses globalMember like this ((IClassInterface*)getGlobalMember())->LOL(); Now the very uber stuff - if i do not reference LOL from shared library, then LOL is not linked in and calling it from application raises exception. Reason - VTABLE contains nul in place of pointer to LOL() function. When i move LOL() definition from .h file to .cpp, suddenly it appears in VTABLE and everything works just great. What explains this behavior?! (gcc compiler + ARM architecture_)

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  • Constructor invokation returned null: what to do?

    - by strager
    I have code which looks like: private static DirectiveNode CreateInstance(Type nodeType, DirectiveInfo info) { var ctor = nodeType.GetConstructor(new[] { typeof(DirectiveInfo) }); if(ctor == null) { throw new MissingMethodException(nodeType.FullName, "ctor"); } var node = ctor.Invoke(new[] { info }) as DirectiveNode; if(node == null) { // ???; } return node; } I am looking for what to do (e.g. what type of exception to throw) when the Invoke method returns something which isn't a DirectiveNode or when it returns null (indicated by // ??? above). (By the method's contract, nodeType will always describe a subclass of DirectiveNode.) I am not sure when calling a constructor would return null, so I am not sure if I should handle anything at all, but I still want to be on the safe side and throw an exception if something goes wrong.

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  • NHibernate 'IdentifierGenerationException' on an Update trigger

    - by Jan Jongboom
    In my database I have an id column defined as [autonumber] [int] IDENTITY(1,1) NOT NULL which is mapped in my .hbm.xml like: <id name="Id" column="autonumber" type="int"> <generator class="identity" /> </id> When calling session.Save() updates are successful committed to the database. When adding a versioning trigger I however get the error this id generator generates Int64, Int32, Int16 of type IdentifierGenerationException. The trigger is defined as: ALTER TRIGGER [dbo].[CatchUpdates_NVM_FDK_Kenmerken] ON [dbo].[NVM_FDK_Kenmerken] INSTEAD OF UPDATE AS BEGIN SET NOCOUNT ON UPDATE NVM_FDK_Kenmerken SET idIsActive = 0 WHERE internalId IN (SELECT internalId FROM INSERTED) INSERT INTO dbo.NVM_FDK_Kenmerken ( vestigingNummer , internalId , someOtherColumns, dateInserted, idIsActive ) SELECT vestigingNummer, internalId, someOtherColumns, GETDATE(), 1 FROM INSERTED END What am I doing wrong here? When doing manual updates everything works just fine and as expected.

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  • Printdialog in multithreaded wpf window thrown TargetInvocationException

    - by Nils
    I have designed a multithreaded app, which is starting most windows in an dedicated thread like this: Thread newWindowThread = new Thread(new ThreadStart(ThreadStartingPoint)); newWindowThread.SetApartmentState(ApartmentState.STA); newWindowThread.IsBackground = true; newWindowThread.Start(); However, if in one of those window-in-own-thread I try to print something by simply calling PrintDialog pDialog = new PrintDialog(); bool? doPrint = pDialog.ShowDialog(); I get a TargetInvocationException - it does look like the PrintDialog does not reside in the same thread as my window. Is there any way to create a thread-agnostic (or "thread-save") PrinterDialog ?

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