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  • buffer overflow with boost::program_options

    - by f4
    Hello, I have a problem using boost:program_options this simple program, copy-pasted from boosts' documentation : #include <boost/program_options.hpp> int main( int argc, char** argv ) { namespace po = boost::program_options; po::options_description desc("Allowed options"); desc.add_options() ("help", "produce help message") ("compression", po::value<int>(), "set compression level") ; return 0; } fails with a buffer overflow. I have activated the "buffer security switch", and when I run it I get an "unknown exception (0xc0000409)" when I step over the line desc.add_options()... I use Visual Studio 2005 and boost 1.43.0. By the way it does run if I deactivate the switch but I don't feel comfortable doing so... unless it's possible to deactivate it locally. So do you have a solution to this problem? EDIT I found the problem I was linking against libboost_program_options-vc80-mt.lib which wasn't the good library.

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  • Looking for an algorithm in vb.net or c# but I don't know it's name!

    - by Jules
    I'll do my best to explain what the algorithm is supposed to do: There's a class 'Recipe'. Each Recipe can include other Recipes but cannot include itself or any other Recipe that includes it. So, a simple example is we have just two Recipes A & B. If A adds B first, then later on B cannot add A because it will cause a loop. A more complicated example is: A,B,C (1) Recipe C Adds B (2) Recipe B Adds A (3) Recipe A attempts to add C, but can't because of the relationship. C - B - A. I can do this myself, I just wondered if this was a standard named algorithm and I could grab the optimal solution. Thanks

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  • Adding single row one by one in tableview from core data of iPhone

    - by user336685
    I am working on RSS reader code where articles get downloaded and are viewable offline. The problem is only after all articles are downlaoded the tableview containing headlines gets updated. Core data is used. So everytime NSobjectcontext is saved , [self tableview updatebegins ] is called.The table is getting updated via fetchcontroller core data. I tried saving NSobjectcontext everytime an article is saved but that is not updating the tableview. I want a mechanism similar to instapaper tableview where articles get saved and tableview gets updated immediately. Please help if you know the solution. Thanks in advance.

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  • Framework Recommendation request: spring, struts, j2ee?

    - by Jack BeNimble
    The last time I looked at web applications, the consensus seemed to be Struts/J2EE. Now, it looks like Spring MVC/J2EE or Struts/J2EE are both viable solutions. Is this generally correct? Or is Spring MVC now the consensus choice over Struts? We have at least one guy who has worked with Struts before and wants to go with that. I'm more familiar with Struts as well, having reviewed in the past. Also, is J2EE still considered the viable solution for handling remote components? Or are there alternatives?

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  • Can PHP Perform Magic Instantiation?

    - by Aiden Bell
    Despite PHP being a pretty poor language and ad-hoc set of libraries ... of which the mix of functions and objects, random argument orders and generally ill-thought out semantics mean constant WTF moments.... ... I will admit, it is quite fun to program in and is fairly ubiquitous. (waiting for Server-side JavaScript to flesh out though) question: Given a class class RandomName extends CommonAppBase {} is there any way to automatically create an instance of any class extending CommonAppBase without explicitly using new? As a rule there will only be one class definition per PHP file. And appending new RandomName() to the end of all files is something I would like to eliminate. The extending class has no constructor; only CommonAppBase's constructor is called. Strange question, but would be nice if anyone knows a solution. Thanks in advance, Aiden (btw, my PHP version is 5.3.2) Please state version restrictions with any answer.

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  • Curious: Could LLVM be used for Infocom z-machine code, and if so how? (in general)

    - by jonhendry2
    Forgive me if this is a silly question, but I'm wondering if/how LLVM could be used to obtain a higher performance Z-Machine VM for interactive fiction. (If it could be used, I'm just looking for some high-level ideas or suggestions, not a detailed solution.) It might seem odd to desire higher performance for a circa-1978 technology, but apparently Z-Machine games produced by the modern Inform 7 IDE can have performance issues due to the huge number of rules that need to be evaluated with each turn. Thanks! FYI: The Z-machine architecture was reverse-engineered by Graham Nelson and is documented at http://www.inform-fiction.org/zmachine/standards/z1point0/overview.html

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  • Finding unique elements in an string array in C

    - by LuckySlevin
    Hi, C bothers me with its handling of strings. I have a pseudocode like this in my mind: char *data[20]; char *tmp; int i,j; for(i=0;i<20;i++) { tmp = data[i]; for(j=1;j<20;j++) { if(strcmp(tmp,data[j]))//then except the uniqueness, store them in elsewhere. } } But when i coded this the results were bad.(I handled all the memory stuff,little things etc.) The problem is in the second loop obviously :D. But i cannot think any solution. How do i find unique strings in an array. Example input : abc def abe abc def deg entered unique ones : abc def abe deg should be found.

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  • Is there a graphics/game engine that supports PC & Mac?

    - by Chris Masterton
    Is their a graphics that runs on both Mac & PC? I've seen Unity and thats a possibility, I'm wondering if there are any other choices. Ideally I want to port the same C++ game code to both PC & Mac platforms, but let the underlying game/graphics engine take advantage of the appropriate hardware. edit: I'm looking on the level of Torque, Gamebryo & Unreal. A commercial solution is perfectly acceptable. Thanks, Chris

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  • How do polymorphic inline caches work with mutable types?

    - by kingkilr
    A polymorphic inline cache works by caching the actual method by the type of the object, in order to avoid the expensive lookup procedures (usually a hashtable lookup). How does one handle the type comparison if the type objects are mutable (i.e. the method might be monkey patched into something different at run time). The one idea I've come up with would be a "class counter" that gets incremented each time a method is adjusted, however this seems like it would be exceptionally expensive in a heavily monkey patched environ since it would kill all the PICs for that class, even if the methods for them weren't altered. I'm sure there must be a good solution to this, as this issue is directly applicable to Javascript and AFAIK all 3 of the big JS VMs have PICs (wow acronym ahoy).

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  • TFS: Managing assembly version number?

    - by TomTom
    Hello, any good approach for managing assembly version numbers in TFS, possibly together with using the same number for the build number? I would be most interested in an approach that: Maintains the first three elements of the version Counts the rest upward for every "official" build (i.e. a build originating from certain templates only - no need to count up for something like a gated checkin, but the following regular integration build SHOULD count up. Labels the builds, so that a manual "release" build can be triggered. Any solution? How are other people handling this? Right now the (new) TFS is happily building with the same assembly version all around ;) Something coding the complete assembly version with date etc. is not acceptable - I want that number to "follow rules", and having the date in there is not one of them ;)

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  • MS Access CrossTab query - across 3 tables

    - by Prembo
    Hi, I have the following 3 tables: 1) Sweetness Table FruitIndex CountryIndex Sweetness 1 1 10 1 2 20 1 3 400 2 1 50 2 2 123 2 3 1 3 1 49 3 2 40 3 3 2 2) Fruit Name Table FruitIndex FruitName 1 Apple 2 Orange 3 Peaches 3) Country Name Table CountryIndex CountryName 1 UnitedStates 2 Canada 3 Mexico I'm trying to perform a CrossTab SQL query to end up with: Fruit\Country UnitedStates Canada Mexico Apple 10 20 400 Orange 50 123 1 Peaches 49 40 2 The challenging part is to label the rows/columns with the relevant names from the Name tables. I can use MS Access to design 2 queries, create the joins the fruit/country names table with the Sweetness table perform crosstab query However I'm having trouble doing this in a single query. I've attempted nesting the 1st query's SQL into the 2nd, but it doesn't seem to work. Unfortunately, my solution needs to be be wholly SQL, as it is an embedded SQL query (cannot rely on query designer in MS Access, etc.). Any help greatly appreciated. Prembo.

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  • Embarrassingly parallel workflow creates too many output files

    - by Hooked
    On a Linux cluster I run many (N > 10^6) independent computations. Each computation takes only a few minutes and the output is a handful of lines. When N was small I was able to store each result in a separate file to be parsed later. With large N however, I find that I am wasting storage space (for the file creation) and simple commands like ls require extra care due to internal limits of bash: -bash: /bin/ls: Argument list too long. Each computation is required to run through a qsub scheduling algorithm so I am unable to create a master program which simply aggregates the output data to a single file. The simple solution of appending to a single fails when two programs finish at the same time and interleave their output. I have no admin access to the cluster, so installing a system-wide database is not an option. How can I collate the output data from embarrassingly parallel computation before it gets unmanageable?

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  • advanced python autovivification

    - by Zhang18
    This question is about implementing the full PERL autovivification in python. I know similary questions were asked before and so far the best answre is http://stackoverflow.com/questions/635483/what-is-the-best-way-to-implement-nested-dictionaries-in-python/652284#652284. However, I'm looking to do this: a['x']['y'].append('z') without declaring a['x']['y'] = [] first, or rather, not declaring a['x'] = {} either. I know dict and list classes sorta don't mix so this is hard, but I'm interested in seeing if someone has an ingenius solution probably involving creating an inherited class from dict but defined a new append method on it? I also know this might throw off some python purists who will ask me to stick with Perl. But even just for a challenge, I'd like to see something. thx!

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  • Passing HttpFileCollectionBase to the Business Layer - Bad?

    - by Terry_Brown
    hopefully there's an easy solution to this one. I have my MVC2 project which allows uploads of files on certain forms. I'm trying to keep my controllers lean, and handle the processing within the business layer of this sort of thing. That said, HttpFileCollectionBase is obviously in the System.Web assembly. Ideally I want to call to something like: UserService.SaveEvidenceFiles(MyUser user, HttpFileCollectionBase files); or something similar and have my business layer handle the logic of how and where these things are saved. But, it feels a little icky to have my models layer with a reference to System.Web in terms of separation of concerns etc. So, we have (that I'm aware of) a few options: the web project handling this, and my controllers getting fatter mapping the HttpFileCollectionBase to something my business layer likes passing the collection through, and accepting that I reference System.Web from my business project Would love some feedback here on best practice approaches to this sort of thing - even if not specifically within the context of the above.

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  • How to write own DLL in Visual Studio, C language (not C++)

    - by oneee
    Dear all, I'm trying to create my own DLL... I used wizzard in VS2008 to create template for DLL. This works fine and the dll builds successfully (Test.dll is created). BUT, when I rename the file from Test.cpp to Test.c (which I guess causes compilation in C-mode), solution rebuilds also successfully, but no .dll is created. The list of all created files follows: mt.dep BuildLog.htm vc90.idb Test.dll.embed.manifest Test.dll.intermediate.manifest Test.obj MySecondCFile.obj vc90.pdb Test.dll.embed.manifest.res For my purposes it's essential that the dll be in C not C++, while I already have a lot of code written in C, which does not compile as C++. Do you know, why .dll is not created? What should I do?

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  • Limit number of views per day in Django

    - by ariddell
    Is there an easy way to limit the number of times a view can be accessed by a given IP address per day/week? A simplified version of the technique used by some booksellers to limit the number of pages of a book you can preview? There's only one view that this limit need apply to--i.e. it's not a general limit--and it would be nice if I could just have a variable overlimit in the template context. The solution need not be terribly robust, but limiting by IP address seemed like a better idea than using a cookie. I've looked into the session middleware but it doesn't make any references to tracking IP addresses as far as I can tell. Has anyone encountered this problem?

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  • Replace xml tag with regex

    - by Kai
    How can I replace a certain part in a xml file with a definied string? <tag1></tag2> <tag2></tag2> ...etc <soundcard num=0> <name>test123</name> </soundcard> <soundcard num=1> <name>test123</name> </soundcard> <soundcard num=2> <name>test123</name> </soundcard> <tag5></tag5> replace all soundcard parts that the result looks like that: <tag1></tag2> <tag2></tag2> ...etc {0} <tag5></tag5> I'm using c# .net 3.5 and I thougt of a regex solution

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  • How can I find the nearest intersection via the Google Maps API?

    - by dusoft
    How can I find the closest intersection of the street I have coordinates of? For instance, say I have street A running from south to north that is crossed by street X on the north and by street Y on the south. Does the Google Maps API allow for finding coordinates of the nearest crossroad (either X or Y) of street A? I couldn't find it mentioned anywhere. PS: The only solution I am aware of is to guess the lowest number and the highest number of building on the street A and to draw polyline between them. I am not sure about this though.

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  • Sending file over socket

    - by johannix
    I'm have a problem sending data as a file from one end of a socket to the other. What's happening is that both the server and client are trying to read the file so the file never gets sent. I was wondering how to have the client block until the server's completed reading the file sent from the client. I have this working with raw packets using send and recv, but figured this was a cleaner solution... Client: connects to server creating socket connection creates a file on socket and sends data waits for file from server Server: waits for file from client Complete interraction: client sends data to server server sends data to client

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  • How to parse a tar file in C++

    - by Brendan Long
    What I want to do is download a .tar file with multiple directories with 2 files each. The problem is I can't find a way to read the tar file without actually extracting the files (using tar). The perfect solution would be something like: #include <easytar> Tarfile tar("somefile.tar"); std::string currentFile, currentFileName; for(int i=0; i<tar.size(); i++){ file = tar.getFileText(i); currentFileName = tar.getFileName(i); // do stuff with it } I'm probably going to have to write this myself, but any ideas would be appreciated..

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  • Is it possible to use AutoMapper to wrap methods?

    - by Woj
    I have two classes: public class TestClass1 { public int TestInt { get; set; } public void TestMethod() { // Do something } } public class TestClass2 { public int TestInt { get; set; } public void TestMethod() { // Do something } } I want to create interface that I can use for both classes. The easiest solution is to implement the interface on TestClass1 and TestClass2 but I don;t have access to the implementation of these classes (external dll). I was wondering if I can create new interface and use AutoMapper to map TestClass1 and TestClass2 to ITestInterface: public interface ITestInterface { int TestInt { get; set; } void TestMethod(); }

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  • Pre-populating Radio Buttons with Java

    - by Gary Deuces Rozanski
    Is it possible to pre-populate a radio button, using jsp, depending on the value in the database? If so, how? I have done research here at StackOverflow & Google but with no real solution. p.s. I hope somebody can help me out with a question. As you will see from previous questions, I am not a developer, but get loaded with questions being the most technical on my team. oh the joy. Any help will be appreciated & I apologize in advance if my question is dumb.

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  • defining a simple implicit Arbitary

    - by FredOverflow
    I have a type Foo with a constructor that takes an Int. How do I define an implicit Arbitrary for Foo to be used with scalacheck? implicit def arbFoo: Arbitrary[Foo] = ??? I came up with the following solution, but it's a bit too "manual" and low-level for my taste: val fooGen = for (i <- Gen.choose(Int.MinValue, Int.MaxValue)) yield new Foo(i) implicit def arbFoo: Arbitrary[Foo] = Arbitrary(fooGen) Ideally, I would want a higher-order function where I just have to plug in an Int => Foo function. I managed to cut it down to: implicit def arbFoo = Arbitrary(Gen.resultOf((i: Int) => new Foo(i))) But I still feel like there has got to be a slightly simpler way.

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  • quick and dirty client/server communication in Silverlight

    - by Mark
    I'm building a few small prototypes in Silverlight and have quite a bit of .NET experience, but Ive never had the need to contact the server from Silverlight. Im really just after a really quick solution for the purposes of prototyping and I'll be needing to call the server and do a few things, like server a generated image from the server, receive basic responses from the server, but nothing too fancy. Is .NET RIA Services the best way to do this or is it overkill? The documentation for RIA Services is huge, 1 hour long video introductions, 26-part series blogs, etc... seems like its overkill. Is there a quick REST based project I could create, or should RIA services be the way to go?

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  • Mac OSX: Passing a link to file from user process to kernel module.

    - by Inso Reiges
    Hello, I need to pass a link to file from a user process to the OSX kernel driver. By link i mean anything that uniquely identifies a file on the local filesystem. I need that link to do I/O on that file in kernel. The most obvious solution seems to pass a file name and use a VFS vnode lookup. However i noticed, that Apple Disk Images helper process passes a raw data array for image-path property to driver when attaching a disk image file: <2f 56 6f 6c 75 6d 65 73 2f 73 74 6f 72 61 67 65 2f 74 65 73 74 32 2e 64 6d 67> What is that diskimages-helper passes to the kernel driver? Some serialized type perhaps? If yes, what type is it and how can i use it?

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