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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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• Sending information down a socket in C#

  - by markyoung1984

  I have built two programs in C# and I am sending simple strings through the sockets. This is fine for the moment but in the near future I will need to send more complicated items, such as objects down the sockets and eventually files. What steps would I take to do this? What purpose do the buffers serve for the sockets/streams? Apologies if I am a little vague.

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• Using C++ from Objective C : how to allocate/deallocate?

  - by Dmitri Nesteruk

  Currently, my Objective C classes use C++ objects by doing a new when the owner is created, and calling delete when it is destroyed. But is there another way? I'd like to be able to declare, say, an auto_ptr whose scope lasts the duration of the Objective C class' lifetime.

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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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• 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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• What is the advantage of using constraints on C# Generics

  - by user313197

  Can someone tell me what the difference is between the following public class CarCollection:List where T:Car { } and public class CarCollection:List { } To me they seem to do the same thing, create type-safe collection of "Car" objects.

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• Blackberry persistance: ObjectGroup createGroup vs. createGroupIgnoreTooBig

  - by Tamar

  What is the difference between the createGroup and createGroupIgnoreTooBig? I understand that createGroup will throw the too big exception when the object exceeds 64k, and createGroupIgnoreTooBig will not. But does it mean that createGroupIgnoreTooBig allows me to create objects larger than 64k, or will it only partially group it?

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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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• 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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• Hadoop: Mapping binary files

  - by restrictedinfinity

  Typically in a the input file is capable of being partially read and processed by Mapper function (as in text files). Is there anything that can be done to handle binaries (say images, serialized objects) which would require all the blocks to be on same host, before the processing can start.

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• How to trim minutes and hours and seconds from Date object?

  - by Roman

  I need to make map where Dates are keys. 2 date objects are equals if they have the same value of getTime() method. I'm interested only in year, month and day. How can I trim unnecessary hours and minutes to get 'clear' dates?

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• How to validate if an HTMLLIElement is hidden with jQuery

  - by Hanzel

  I'm iterating through a variable called content, it contains several HTMLLIElement objects. How can i use jQuery's or JavaScript's functions with this object?, what I'm trying to do is the kind of validation written in the commented code. $.each(content, function(index, value){ //if(!value.is(':hidden')){ console.log(index + ' : ' + value); //} }); What I'm getting is Uncaught TypeError: Object # has no method 'is' If I do value.getAttribute('style'); I get 'display: none;'

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• Are there any data-binding solution that works in C++ and GWT and supports structures polymorphism?

  - by user116854

  I expect it should share a common description, like XmlSchema or IDL and should generate classes for target language. I found Thrift and it's really nice solution, but it doesn't support structures polymorphism. I would like to have collections of base class objects, where I could place instances of subclasses, serialize this and deserialize at the opposite side. Some mechanism of polymorphic behavior support, like Visitor, would be a perfect. Does anybody know something suitable for these requirements?

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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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• 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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• 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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• 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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• 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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• 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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• 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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• regarding object recycling

  - by ajaycv

  I have a question. What is wrong with regards to the below code: ArrayList tempList2 = new ArrayList(); tempList2 = getXYZ(tempList1, tempList2); //method getXYZ getXYZ(ArrayList tempList1, ArrayList tempList2) { //does some logic and adds objects into tempList2 return tempList2; } The code will get executed but it seems by passing tempList2 to the getXYZ method argument, it is doing object recycling. My question is, Is recycling the tempList2 arraylist object correct?

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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 Can I Implement This Function?

  - by hoora

  I'm a beginner and I want to write Java code in eclipse. This program takes two LinkedLists of integers (for example, a and b) and makes a LinkedList (for example d) in which every element is the sum of elements from a and b. However, I can't add these two elements from a and b because they are Objects Example: a=[3,4,6,7,8] b=[4,3,7,5,3,2,1] ------ d=[7,7,13,12,11,2,1]

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• Documenting functions in C++ with Doxygen

  - by Paul

  I've got a project that I'm using Doxygen to generate documentation to. The documentation of the classes is fine, but I've also got some functions that I use in main() to create objects etc. I'd also like to have these into my documentation, but I have not figured how to do that. Any suggestions?

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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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