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  • How to get the entire code of a method in memory so I can calculate its hash at runtime?

    - by bejo
    Hello stackoverflow, How to get the entire code of a method in memory so I can calculate its hash at runtime? I need to make a function like this: type TProcedureOfObject = procedure of object; function TForm1.CalculateHashValue (AMethod: TProcedureOfObject): string; var MemStream: TMemoryStream; begin result:=''; MemStream:=TMemoryStream.Create; try //how to get the code of AMethod into TMemoryStream? result:=MD5(MemStream); //I already have the MD5 function finally MemStream.Free; end; end; I use Delphi 7. Thank you.

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  • CMS or roll-yer-own?

    - by girlwithglasses
    I have a database of software tools and I want to be able to have users rate and comment on the tools, and view the ratings and comments that other users have left. To lower the risk of spammers attacking the site, I would like to be able to restrict comment/rating permissions to those who are logged in. At present, the tools are in a list on a static html page as part of a website that is very "non-interactive"; other than the contact form, there is nowhere that users contribute content to the site. We maintain a wiki (of the standard mediawiki flavour) that users can contribute to, and we also have a Drupal installation as a news site. Does anyone have any experience of creating such a rating/commenting system, and whether it would be better to use Mediawiki or Drupal (or another free CMS?), or to try to create something myself? Any advice would be appreciated. Thanks!

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  • A good ecommerce alternative to Magento?

    - by delboud
    I been dealing with Magneto for the last 6 months now and its a real headache, always some type of error, slow, bloated, dead community and overly complex to customize (and im a designer...) I look at others like zencart but seem kinda dated compared to magento, but are their any other solutions to replace magento thats better and with a good online community? the main selling points im looking for are configurable items (as in options for products), good online community and not so hard to customize or a nice amount of templates available. has to be free and hopefully open source and if it helps this is for a custom car accessories store

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  • I'm trying to find an online classifieds software

    - by stackingtheoverflow
    ...for a client. Free or not, doesn't matter if its worth it. He told me he wants to do a Craigslist clone serving one specific geographical area only (a city that shall remain unnamed). It should also be multilingual and open-source (I want to be able to modify the code as needed). Right now I'm looking at ikiclassifieds.com, open-classifieds.com, and noahsclassifieds.org. Does anyone know of a classifieds software that meets the above mentioned criteria? Thanks!

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  • design-pattern libraries ready-to-use?

    - by fayer
    symfony has released some of their components free to use outside the framework. i have used the event dispatcher and dependency injection...they are awesome! i wonder if there are other components/libraries (from other frameworks etc) that in the same way help you manage various design patterns? eg. decorator, facade, singleton, chain of commands etc. i think symfony is on the right path, abstracting away the design patterns. are there any other components out there doing the same? thanks

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  • Using std::bad_alloc for C pointers

    - by otibom
    I'm using a library written in C in a C++ project. I'd like to use C++ exceptions to handle C errors. In particular, it would be nice to have an exception thrown if an allocation fails. I can do this in constructors of classes which hold C-style pointers to C structs : if (c_object == NULL) throw std::bad_alloc(); But if the class is responsible for several C objects they are no ways of free-ing all already allocated pointers since the destructor isn't called. I have a feeling I could use smart-pointers, but I don't have much experience with them. What's more, I have to have access to the original C pointers to use the C api properly. Is there an elegant solution to this ?

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  • Subversion Copy Hook on Windows

    - by GeoSQL
    Hi I am working on a web based project in my free time. I have SVN set up on my machine (running XP). What I would like to do is have a copy of my repository copied to the htdocs folder (Dev machine) post-commit via a hook. That way I can test my changes in a browser. I know that I can write up a .bat file, but I'm not sure what the syntax would be. I can do a basic DOS Copy command, but I saw one example that provided a username and password to SVN at copy time. Do I need to do this? Can someone point me in the right direction as far a syntax for the .bat file? Or maybe even suggest a better method. Thanks

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  • Regex: How to leave out webding font characters?

    - by DS
    Hi, I've a free text field on my form where the users can type in anything. Some users are pasting text into this field from Word documents with some weird characters that I don't want to go in my DB. (e.g. webding font characters) I'm trying to get a regular expression that would give me only the alphanum and the punctuation characters. But when I try the following, the output is still all the characters. How can I leave them out? <html><body><script type="text/javascript">var str="???????";document.write(str.replace(/[^a-zA-Z 0-9 [:punct]]+/g, " "));</script></body></html>

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  • How to make an mutable C array for this data type?

    - by mystify
    There's this instance variable in my objective-c class: ALuint source; I need to have an mutable array of OpenAL Sources, so in this case probably I need a mutable C-array. But how would I create one? There are many questions regarding that: 1) How to create an mutable C-array? 2) How to add something to that mutable C-array? 3) How to remove something from that mutable C-array? 4) What memory management pitfalls must I be aware of? Must i free() it in my -dealloc method? And yes, I think this is something for the nice community wiki...

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  • Boost Shared Pointers and Memory Management

    - by Izza
    I began using boost rather recently and am impressed by the functionality and APIs provided. In using boost::shared_ptr, when I check the program with Valgrind, I found a considerable number of "Still reachable" memory leaks. As per the documentation of Valgrind, these are not a problem. However, since I used to use the standard C++ library only, I always made sure that any program written is completely free from memory leaks. My question is, are these memory leaks something to worry about? I tried using reset(), however it only decrements the reference count, doesn't deallocate memory. Can I safely ignore these, or any way to forcibly deallocate the memory allocated by boost::shared_ptr? Thank you.

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  • super-space-optimized code

    - by Will
    There are key self-contained algorithms - particularly cryptography-related such as AES, RSA, SHA1 etc - which you can find many implementations of for free on the internet. Some are written to be nice and portable clean C. Some are written to be fast - often with macros, and explicit unrolling. As far as I can tell, none are trying to be especially super-small - so I'm resigned to writing my own - explicitly AES128 decryption and SHA1 for ARM THUMB2. What patterns and tricks can I use to do so? Are there compilers/tools that can roll-up code?

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  • Delphi Memory Management

    - by nomad311
    I haven't been able to find the answers to a couple of my Delphi memory management questions. I could test different scenarios (which I did to find out what breaks the FreeAndNil method), but its takes too long and its hard! But seriously, I would also like to know how you all (Delphi developers) handle these memory management issues. My Questions (Feel free to pose your own I'm sure the answers to them will help me too): Does FreeAndNil work for COM objects? My thoughts are I don't need it, but if all I need to do is set it to nil than why not stay consistent in my finally block and use FreeAndNil for everything? Whats the proper way to clean up static arrays (myArr : Array[0..5] of TObject). I can't FreeAndNil it, so is it good enough to just set it to nil (do I need to do that after I've FreeAnNil'd each object?)? Thanks Guys!

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  • MySQL: Matching inexact values using "ON"

    - by Brad
    I'm way out of my league here... I have a mapping table (table1) to assign particular values (value) to a whole number (map_nu). My second table (table2), is a collection of averages (avg) (I couldn't figure out how to properly make a markdown table, please feel free to edit!) table1: table2: (value)(Map_nu) (avg) ---- ----- 1 1 1.111 1.045 2 1.2 1.09 3 1.33333 1.135 4 1 1.18 5 1.389 1.225 6 1.42 1.27 7 1.07 1.315 8 1.36 9 1.405 10 I need to find a way to match the averages from table2 to the closest value in table1. It only need to match to the 2 digit past the decimal, so I've added the Truncated function SELECT map_nu FROM `table1` JOIN table2 ON TRUNCATE(table1.value,2)=TRUNCATE(table2.avg,2) I still miss the values that don't match the averages exactly. Is there a way to pick the nearest truncated value? Thanks!

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  • Anyone know how you can get a Google dev phone to make Android apps?

    - by Bobafett
    Hi there, I am thinking about converting my web apps into Android apps to reach the Android market. I do not have an Android phone. Can someone tell me how I can possibly get a Google developer phone (other than going to Google I/O, etc)? I realize this is somewhat of a ridiculous request but I have read blogs of people being enticed by google and offered a free phone to convert their web apps into Android apps. So I figure there is no harm in asking. Any insight would be helpful. Thanks I am also wondering what the cost of the developer phone is once you pay your $25 to enter the android market place as a developer through the developer account.

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  • How to create thumbnail images from DOC/RTF/PDF/XLS files

    - by imdadhusen
    I need to ask if any of you has any knowledge of creating file thumbnails on the fly. I have found a free component but it works only for PDF files, PDFThumbnailer. But my requirement is to convert DOC/RTF/PDF/XLS files to thumbnails on the fly, and if possible allow to save it as an image for later reference which currently PDFThumbnailer doesnt allow. PDFThumbnailer takes the pdf file and renders an image for it on browser, if that image can also be saved somehow to my machine that would be great too. Please guide me of how to achieve the above requirements. Any help for any filetype is appreciated. Thanks Imdadhusen

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  • Getting error "Activex Component cannot create Object" while using .NET dll in VB 6 Code

    - by ssman321
    HI, I am deploying a VB6 application on client machine. The Application need to access code from a C#.NET dll. I created a COM object of the .NET dll and used it VB 6 using the side by side versioning (Registration free COM). It is running fine on the development machine but on the client machine it is throwing an error "ActiveX Component cannot create Object" I created two manifest files one for the VB application and the other one for the C# application. I embedded the C# manifest file in the C#.NET dll through visual studio 2008. Am I missing some step. Please help me out. Thanks in advance.

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  • Should I combine unrelated interfaces into a single library?

    - by mafutrct
    Situation is like this: There are independent 5 services. Each service consists of a project for interface, implementation and test. Example: LocalizationService.Interfaces LocalizationService.Implementation LocalizationService.Test There is a WCF service for each of the services: LocalizationService.WcfContract (including DataContracts) LocalizationService.WcfHost The client applications are probably mostly going to use all of the services. Should I combine all service interfaces into a common one? AllServices.AllInterfaces In my opinion, this is a bad idea. The services are independent and there is no reason to introduce a dependency. I imagine that especially testing becomes more difficult. However, one may argue that having to include 5 libraries is too much of a hassle. (I'm not sure how to tag this. Feel free to retag.)

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  • freeing malloc and checkin it is empty or not

    - by gcc
    char *p; p="kjkjk"; . .//there are codes which are checking another command . if(.....)//i used pointer p in only that area free(p); . . //there are codes which are checking another command . if(p==NULL) //i check whether is empty .... if(p==-1) //can we use "EOF==p " in if statement ... //are there any usage like that EOF==p else .... I think there is big error , but where?

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  • C++ destructor issue with std::vector of class objects

    - by Nigel
    I am confused about how to use destructors when I have a std::vector of my class. So if I create a simple class as follows: class Test { private: int *big; public: Test () { big = new int[10000]; } ~Test () { delete [] big; } }; Then in my main function I do the following: Test tObj = Test(); vector<Test> tVec; tVec.push_back(tObj); I get a runtime crash in the destructor of Test when I go out of scope. Why is this and how can I safely free my memory?

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  • F# equivalent of the C# typeof(IEnumerable<>)

    - by Rune FS
    I have a piece of code where I need to figure out if a given type implements IEnumerable (I don't care about the T) I've tried (t:System.Type in case you wonder) let interfaces = t.GetInterfaces() let enumerbale = interfaces.Any( fun t -> (t.GetGenericTypeDefinition() = typeof<IEnumerable<>>) however that wont compile (the compile don't like the <). I then tried let interfaces = t.GetInterfaces() let enumerbale = interfaces.Any( fun t -> (t.GetGenericTypeDefinition() = typeof<IEnumerable<'a>>) but get's a warning that 'a is constraint to obj. I Don't want to figure out if IEnumerable is implemented but IEnumerabl<. Any one know's the solution and btw feel free to comment on the code above as well. It's my first non-trivial F# program

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  • I am looking for a svn helper program

    - by uzay95
    I didn't remember the name of this program. But i can remember how it works. Program is working on tray. When we double click on it it is showing its main window. :) I could add some criterias to make automatic commit(and maybe update). For ex: if a file changes or if files to be deleted, you can commit. The best part of this program is: "it is FREE" I don't remember exactly but i think it has M name in its name (but i don't remember). I think this program written by an Italian man. And its web site was very simple (and i think its fonts were green)

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  • Which to use - "operator new" or "operator new[]" - to allocate a block of raw memory in C++?

    - by sharptooth
    My C++ program needs a block of uninitialized memory. In C I would use malloc() and later free(). In C++ I can either call ::operator new or ::operator new[] and ::operator delete or operator delete[] respectively later. Looks like both ::operator new and ::operator new[] have exactly the same signature and exactly the same behavior. The same for ::operator delete and ::operator delete[]. The only thing I shouldn't do is pairing operator new with operator delete[] and vice versa - undefined behavior. Other than that which pair do I choose and why?

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  • C++: Delete a struct?

    - by Rosarch
    I have a struct that contains pointers: struct foo { char* f; int* d; wchar* m; } I have a vector of shared pointers to these structs: vector<shared_ptr<foo>> vec; vec is allocated on the stack. When it passes out of scope at the end of the method, its destructor will be called. (Right?) That will in turn call the destructor of each element in the vector. (Right?) Does calling delete foo delete just the pointers such as foo.f, or does it actually free the memory from the heap?

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  • I want to make my own Malloc

    - by Unknown
    I want to make my own malloc/free so I can make a precise copying allocator. Any gurus have any tips and suggestions? I have a few questions for now: Should I just malloc large chunks of memory, and then distribute from that so I don't have to call the system calls? How are copying collectors usually done? I would imagine that this part is a bit complicated to do efficiently. My naive implementation would just malloc a block the size of the remaining objects which would require 2x the space.

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  • Help with memory leak (malloc)

    - by user146780
    I'v followed a tutorial to use OGL tesselaton. In one of the callbacks there is a malloc and it creates a leak every time I render a new frame. void CALLBACK combineCallback(GLdouble coords[3], GLdouble *vertex_data[4], GLfloat weight[4], GLdouble **dataOut) { GLdouble *vertex; vertex = (GLdouble *) malloc(6 * sizeof(GLdouble)); vertex[0] = coords[0]; vertex[1] = coords[1]; vertex[2] = coords[2]; for (int i = 3; i < 6; i++) { vertex[i] = weight[0] * vertex_data[0][i] + weight[1] * vertex_data[0][i] + weight[2] * vertex_data[0][i] + weight[3] * vertex_data[0][i]; } *dataOut = vertex; } I'v tried to free(vertex) but then the polygons did not render. I also tried allocating on the heap then doing delete(vertex) but then the polygon rendered awkwardly. I'm not sure what to do. Thanks

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