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• How to create a level with curved lines with cocos2d + Box2d on the iphone?

  - by Steven

  I'd like to create a game that has levels such as this: http://img169.imageshack.us/img169/7294/picdq.png The Player moves "flies" through the level and mustn't collide with the walls. How can I create such levels? I found that piece of software: http://www.sapusmedia.com/levelsvg/ It's not that cheap, so I wonder whether there is another way to create such a level as shown in the picture above...?

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• Database structure for versioning and multiple languages

  - by phobia

  How can I solve the issue of content existing in multiple versions and multiple languages? My current structure: Each content can only have one active version in each language, and that's how I'm curious on how to best solve. Right now I have a column of the contentversions table, which means for each change of active version I have to run a update and set active=false on all version and then a update to set active=true for the piece of content in question.

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• Trace the function implemented by DeviceioControl

  - by ame

  I am working with a WinCE device which has a radio manager driver written for it in MFC. In the code for the Radio GUI, I can see the function Deviceiocontrol with a specific IOCTL being called. However, I'm unable to trace the particular piece of code called by this function. Can someone tell me how Deviceiocontrol works?

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• Find the base revision,message

  - by Vepr

  I have a task: "Find base revision: select latest SVN revision that has message "TRANSLATION_BASE_EN_NO". If tag was found - get all the resources from that revision" How can I read messages, and search for the revision I need? I want to see a piece of code of course. In C# (vs2008) Thanks

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• Generating thumbnails using jquery or javascript

  - by Hulk

  All, Can any 1 of you show a small piece of code for generating a thumbnail of any website using javascript or jquery, I had posted earlier but couldnt find any right match for my requirements. <div id="generate_thumbnail" onclick ="generate();"> //Show thumbnail within this div </div> <Script> function generate() { // generate small thumbnail }

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• In Ruby, in the context of a class method, what are instance and class variables?

  - by J. Pablo Fernández

  If I have the following piece of Ruby code: class Blah def self.bleh @blih = "Hello" @@bloh = "World" end end What exactly are @blih and @@bloh? @blih is an instance variable in the class Blah, and @@bloh is a class variable in the class Blah, correct? Does it mean that @@bloh is a variable in Blah's class, Class?

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• Determining if Memory Pointer is Valid - C++

  - by Jim Fell

  It has been my observation that if free( ptr ) is called where ptr is not a valid pointer to system-allocated memory, an access violation occurs. Let's say that I call free like this: LPVOID ptr = (LPVOID)0x12345678; free( ptr ); This will most definitely cause an access violation. Is there a way to test that the memory location pointed to by ptr is valid system-allocated memory? It seems to me that the the memory management part of the Windows OS kernel must know what memory has been allocated and what memory remains for allocation. Otherwise, how could it know if enough memory remains to satisfy a given request? (rhetorical) That said, it seems reasonable to conclude that there must be a function (or set of functions) that would allow a user to determine if a pointer is valid system-allocated memory. Perhaps Microsoft has not made these functions public. If Microsoft has not provided such an API, I can only presume that it was for an intentional and specific reason. Would providing such a hook into the system prose a significant threat to system security? Situation Report Although knowing whether a memory pointer is valid could be useful in many scenarios, this is my particular situation: I am writing a driver for a new piece of hardware that is to replace an existing piece of hardware that connects to the PC via USB. My mandate is to write the new driver such that calls to the existing API for the current driver will continue to work in the PC applications in which it is used. Thus the only required changes to existing applications is to load the appropriate driver DLL(s) at startup. The problem here is that the existing driver uses a callback to send received serial messages to the application; a pointer to allocated memory containing the message is passed from the driver to the application via the callback. It is then the responsibility of the application to call another driver API to free the memory by passing back the same pointer from the application to the driver. In this scenario the second API has no way to determine if the application has actually passed back a pointer to valid memory.

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• My Oracle 9i package won't compile, says that a user-defined function is out of scope... but it isn'

  - by bitstream

  I have an Oracle package which contains user-defined functions and procedures, including two user-defined functions which are called from SELECT and UPDATE statements. The functions in question are defined before the procedures that call them. This piece of code compiles and works fine on Oracle 10g but won't compile on 9i. The code should work as-is according to Oracle's own documentation. Any idea why it would throw this error on 9i?

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• java classcast exception

  - by shil

  hi i have problems in converting an XML document type into a Document object.. this is the piece of code line 1 : Document doc=null; line 2 : doc = (Document) parser.parse(sourceFile); for this line 2 it throws java classcast exception.. without the typecast it shows error as "Type mismatch: cannot convert from org.w3c.dom.Document to javax.swing.text.Document" how do i now typecast properly? any suggestions??

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• How to properly name classes inside a domain namespace?

  - by devoured elysium

  Let's say I'm trying to implement a Chess Game. I'd create my Chess classes in a Chess namespace. Now, should I prefix all my Chess related classes with the Chess word, or as they are already inside that namespace, should I just call them by what they are? Example: ChessGame vs Game ChessPiece vs Piece

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• Are the outputs of javascript parsers of different browsers the same?

  - by Paul

  Suppose there is a piece of JavaScript code that is supported by different browsers, for example IE and Firefox. Would the JavaScript parsers of the different browsers generate the same output (i.e., the same AST)?

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• How to pack python files and its dependencies in a single executable file?

  - by Gatis

  I've got a piece of software which consists of several python sources and a couple of c++ libraries. I'd like to pack them in a executable single file, just like java does with .jar files. Is there a way to do that?

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• Correct use of boost lambda

  - by Niels P.

  Consider the following piece of C++0x code: a_signal.connect([](int i) { if(boost::any_cast<std::string>(_buffer[i]) == "foo") { base_class<>* an_object = new derived_class(); an_object->a_method(_buffer[i]); }}); How would it correctly look in Boost Lambda (since this C++0x feature can't be used yet)?

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• What about buffering FileInputStream?

  - by Pregzt

  I have a piece of code that reads hell of a lot (hundreds of thousand) of relatively small files (couple of KB) from the local file system in a loop. For each file there is a java.io.FileInputStream created to read the content. The process its very slow and take ages. Do you think that wrapping the FIS into java.io.BufferedInputStream would make a significant difference?

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• how to print the linenumber of incorrectwords located in a txt file ?

  - by jad

  i have this piece of code which only prints the line number of the incorrect words. i want it to print the linenumbers of the incorrect words from the txt file. Am i able to modify this code to do that? # text1 is my incorrect words # words is my text file where my incorrect word are in from collections import defaultdict d = defaultdict(list) for lineno, word in enumerate(text1): d[word].append(lineno) print(d)

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• Do you ever miss the static type system in Clojure?

  - by Michiel Borkent

  Are there ever situations while developing in Clojure when you miss the static type system you have available in languages like Haskell and F#? Can you give an example of a piece of code when the type system would come in very handy?

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• How do you remove functionality from a program in ruby?

  - by Andrew Grimm

  You have some code you want to remove associated with an obsolete piece of functionality from a ruby project. How do ensure that you get rid of all of the code? Some guidelines that usually help in refactoring ruby apply, but there are added challenges because having code that isn't being called by anything won't break any unit tests.

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• Java return to position N in call stack.

  - by Finbarr

  Using the return keyword in Java code will return execution to the last piece of calling code in the call stack. If object foo calls baz.bar(), the return keyword in the bar method will continue code execution in foo. Let's say I have object foo that calls foofoo that calls foofoofoo in the above scenario, and foofoofoo calls baz.bar(). Is there anyway in Java to use the return keyword, or something else, so that the code in the bar method can return all the way back up to foo? (WITHOUT THROWING AN EXCEPTION)

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• Can we use Facelets in JSF1.1_02?

  - by ramkarthik12

  Can we use Facelets in JSF1.1_02?If we can please send me some piece of code relating to that?Can anyone tell me which version of tomcat will support Sun RI1.1_02?I have a restriction of jsf1.1 in my project so if anyone know the thing related to this please share with me!!!!

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• Webcam capture with c# and convert to avi

  - by Spidfire

  Im trying to make a program that captures a video from the webcam and sound from the microphone but im getting stuck at the part where ive try to make a movie out of still images ive heard you need to use directshow but it doesnt jet work for me Does someone know a good piece of example code that captures video and sound and can encode it to a file (divx or something like that) ? or some suggestions where to look so i can build it myself (if a other programming language is better for this im happy to know it early. )

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• [python] parsing a string of ascii text into separate variables

  - by jml

  Hi there, I have a piece of text that gets handed to me like: here is line one\n\nhere is line two\n\nhere is line three What I would like to do is break this string up into three separate variables. I'm not quite sure how one would go about accomplishing this in python. Thanks for any help, jml

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• free pivot table implementation for qt

  - by Michal Nowotka

  I'm looking for free implementation of pivot table view for Qt. Does someone know where to find such piece of code? Or maybe it's trivial to implement...

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• Cross site scripting help?

  - by shane87

  I have a piece of javascript executing on a jetty server which is sending a XMLHTTPRequest to a scoket on another server(wamp server). The request gets sent to the socket, however the XHR response seems to be getting blocked. My only thoughts on this is it may be an issue with XSS(cross site scripting). Is there a way in which i could enable cross site scripting for this particular request or is there something else i should be doing? Any help would be greatly appreciated!

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• What libraries provide cross-platform 3D and P2P support?

  - by uckelman

  I'm trying to find a constellation of libraries which, taken together, meet the following requirements: Smooth scaling, rotation, panning (in two dimensions). I'll have a large bitmap (or SVG, in some cases), maybe up to 10000x10000 pixels, which serves as map, with some middling number of small bitmaps (or, again, possibly SVG) that can be dragged around over it. I need to be able to zoom, rotate, and pan this scene; however, the view will always be normal to (i.e., looking head-on at) the large bitmap, so I'm not really using the depth dimension. Peer-to-peer. I'd like for multiple users to be able to connect in order to share one of the scenes mentioned above, preferably peer-to-peer, without much configuration by the user. I'm intending to have a server running for cases where users are unable to connect P2P; I'd like to have the failover happen automatically, or possibly have some way of promoting clients who are capable to be servers themselves. Synchronization. Once a user has started dragging one of the small bitmaps (a piece), no other user should be able to drag that piece until the drag stops. I haven't thought of exactly how to do this---there might be a simple solution, or this kind of synchronization might be something that a library provides. Cross(ish)-platform. I need to be able to run on Linux, Windows, and Mac OS. It would be nice to also be able to run on tablets. Having mostly the same code for all platforms is a plus, but not absolutely necessary. (L)GPL compatible. I'm planning to release under the LGPL or GPL, preferably the latter, so I need libraries which have compatible licenses. I'm not set on any particular language, I'd like to use the library or libraries which make the work easiest, though my preference is to work in at most two languages for the project. (The Model could potentially be in one language and the View in another, so they could talk to each other via some protocol I define, if that would get me a better selection of libraries to use.) Can anyone offer suggestions for what to use?

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• Detecting all memory changes in C

  - by jetru

  Is there a way I can find out all changes to memory by a particular piece of code( a function or a line of code ) without knowing in advance where I expect the changes(I want to watch the whole program memory space)? watch in gdb requires me to know what I expect is changing...

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