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• How do I query for this in Django?

  - by alex

  | random_code | varchar(200) | YES | UNI | NULL | | MyTable.objects.filter(random_code = None) Is this correct? Will this SELECT where there is no random code set? Above is my table.

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• What's the consequence when Core Data detects an optimistic locking failure when trying to save?

  - by dontWatchMyProfile

  I get it: When a managed object context saves, the snapshots of all edited objects are compared against the values in the persistent store to see if the PS has changed since the snapshot was made. If it did change, then there's a conflict and optimistic locking failed, according to Apple. But now, what's the consequence of this? What happens next? What are my options in this case?

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• Is it the best practice to extract an interface for every class?

  - by the_drow

  I have seen code where every class has an interface that it implements. Sometimes there is no common interface for them all. They are just there and they are used instead of concreate objects. They do not offer a generic interface for two classes and are specific to the domain of the problem that the class solves. Is there any reason to do that?

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• jQuery Fade a div off the screen

  - by Scott B

  In my app, I have a temporary div that is shown each time the app is saved (see markup below). I'm using jQuery 1.4.2 and would like to know the command that will fade this div off the screen after 3 seconds... <script src="../wp-content/themes/mytheme/jquery-1.4.2.min.js" type="text/javascript"></script> if ($_REQUEST['saved']) echo '<div id="message" class="updated fade"><p>'.$themename.' settings saved.</strong></p></div>';

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• Events Internals: In .net how are Events represented internally?

  - by JeeZ

  Hi All, I have a basic doubt. Internally how are events represented as methods or as (fields)objects. If event is a field then how one can still contain events in the interface definition. Thanks JeeZ

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• 1030 Got error 28 from storage engine

  - by ScoRpion...

  I am working on a project where i need to create a database with 300 tables for each user who wants to see the demo application. it was working fine but today when i was testing with a new user to see a demo it showed me this error message 1030 Got error 28 from storage engine After spending some time googling i found it is an error that is related to space of database or temporary files. I tried to fix it but i failed. now i am not even able to start mysql. How can i fix this and i would also like to increase the size to maximum so that i won't face the same issue again and again.

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• GC Rules : how to findout a java object is eligible for garbage collection or not

  - by JavaUser

  Hi , Anyone point me the set of defined rules to find out the eligibility for garbage collection of java objects and a simple example for that .

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• Open-source image processing library that supports high level 3D algorithms ?

  - by user363827

  High, I need to do some image manipulations on CT volume images. Mainly segmentations. Which open-source library supports 3D algorithms - Filtering, edge detection, deformable objects and so ? Language is not an issue at the moment. 10x

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• Java reference storage question

  - by aab

  In java, when you pass an object to a method as a parameter, it is actually passing a reference, or a pointer, to that object because objects in Java are references. Inside the function, it has a pointer to that object which is a location in memory. I am wondering where this pointer lives in memory? Is a new memory location created once inside the function to hold this reference?

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• How do I add animation to an iPhone app?

  - by james p

  So I came from a Flash background where I can animate in timeline. I've completed the Beginning iPhone Development book and just realized that I still don't know how to get an animation in. I'm guessing I need to import png sequences? Can anyone point me to an appropriate place to learn more about this topic? I want to make a game and my game objects need to animate. Thanks in advance!!

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• Convert Nulls to Empty String in an object.

  - by John

  What is the easiest way to take an objects and convert any of its values from null to string.empty ? I was thinking about a routine that I can pass in any object, but I am not sure how to loop through all the values.

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• Where namespace does operator<< (stream) go to?

  - by aaa

  If I have have some overloaded ostream operators, defined for library local objects, is its okay for them to go to std namespace? If I do not declare them in std namespace, then I must use using ns:: operator <<. As a possible follow-up question, are there any operators which should go to standard or global namespace?

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• mongodb java driver - raw command?

  - by Scott

  Is it possible to execute raw commands as javascript through the Java driver for MongoDB? I'm tired of wrapping everything in Java objects using Rhino, and would happily sacrifice performance for the convenience of passing javascript directly through to the DB. If not, I can always use sleepymongoose or something, but I don't really want to add yet another language (python) to the stack at this point. Any insights are appreciated.

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• Jquery .show() and .hide() or even .css({"display":"none"}); not working in firefox?

  - by tarnfeld

  For some odd reason the part where objects are shown and hidden in my script doesn't seem to be working. I'm not sure if its the fact firefox doesn't like that or whether its the function-based code I have (to save duplicating lines of code)? There is a working example here and the javascript is here All help appreciated

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• Is it worth setting pointers to NULL in a destructor?

  - by Rob

  Imagine I have a class that allocates memory (forget about smart pointers for now): class Foo { public: Foo() : bar(new Bar) { } ~Foo() { delete bar; } void doSomething() { bar->doSomething(); } private: Bar* bar; }; As well as deleting the objects in the destructor is it also worth setting them to NULL? I'm assuming that setting the pointer to NULL in the destructor of the example above is a waste of time.

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• Where should I declare a list of 5,000+ words?

  - by user647362

  I am writing a game in python in which I must periodically pull a random word from a list of words. When I prototyped my game I declared a word_list = ['cat','dog','rat','house'] of ten words at the top of one of my modules. I then use choice(word_list) to get a random word. However, I must must change this temporary hack into something more elegant because I need to increase the size of the word list to 5,000+ words. If I do this in my current module it will look ridiculous. Should I put all of these words in a flat txt file, and then read from that file as I need words? If so, how would I best do that? Put each word an a separate line and then read one random line? I'm not sure what the most efficient way is.

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• How do I register a marker interface so it is visible in Plones's ZMI?

  - by joeforker

  I would like to register a marker interface so I can add it to objects in the ZMI. My product's configure.zcml contains: <interface interface=".interfaces.IMarkerInterface" /> and, after reinstalling, the interface shows up in the list of available interfaces. But if I try to add it to an object in the ZMI I get a ComponentLookupError. What's missing?

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• C/C++ opaque pointer library

  - by aaa

  hello Is there library/header already written to manage C++ objects from C using opaque pointers/handles? I can write one myself, but I would rather use already made solution, especially if it has fortran bindings. Thanks

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• how do you dynamically load a uitableview from a nsarray

  - by darthwillard

  so i have a nsmutablearray that populates from a socket message. problem is, when i call numberofrowsinsection on the uitableview, it will be 0, because it loads from the array. the array has 0 objects, because the incomingMessage hasn't been received yet. i observe this array in my appdelegate, when it changes, i call refreshData on the tableView, but it doesn't refresh. how do you load a uitableview from a dynamic array?

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• difference between erase and remove/remove_if algorithms?

  - by Eric

  What is really the difference between the algorithms remove and remove_if and the member function erase? Does both of them result in a call to the removed objects destructor?

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• Updating Access Database with Json in ASP

  - by krishit

  Hi, I have to use Json objects and Create, Update, delete and retrive the records in asp. if anybody have an example, please help me. Thanks in advance.

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• how to read the fields in the object that is store in the array in objective-c

  - by uttam

  my appdelegate is having the array book, this array is storing the many object. this object are containing the many latitude and longitude values coming from server. and later i want to assing that values to the coordinate of the cllocationcoordinate2d object. how can i read that values of latitude and longitude store in the object and that objects are store in the array.

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• Advanced Registry Monitoring

  - by RyanTimmons91

  I'm attempting to create a small utility to watch for the creation (or modification) of a specific registry key, and to kill the process responsible for causing that registry modification. I have had success in watching the changes to the registry via a class called 'RegistryMonitor', however it does not give you any information on what process initiated the registry call, through some googling I found that a library called 'EasyHook' should be able to do what I want, but all the documentation states that its designed for a per-application hook. The program itself is a temporary security patch, until our vendors come out with an official security update. As best I can tell there isn't a way to do exactly what I want to accomplish from C#, which is the only language I can comfortable write, test and execute software in. Any help on this would be appreciated I'm considering watching the registry changes via the program I already have, then if the change is discovered (the pc is already infected) running RKill and locking down the PC to prevent the issue from getting any worse

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• JQuery - Extend and Access Superclass

  - by Steve

  Is there a way to access the super object when extending objects using $.extend? I would like to extend an object, override a method, but call the overridden superclass method in the subclass method.

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• Should I reuse Points and Rectangles or create new ones?

  - by Newtang

  In a method that gets called frequently, like a painting event, is it more efficient to reuse Point and Rectangle Objects (for specifying locations and bounds), or should I create new ones.

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