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• Looking for Open-Source or Licensed Personalised Greeting Card software

  - by Mr Pablo

  Before I jump in at the very deep end and try to make my own version of Moon Pig (www.moonpig.com) I would like to know what (if any) software/platforms currently exist that allow for visitors to personalise cards with text and uploaded photos and then purchase printed versions all via a single e-Commerce style platform. I have Googled till my fingers bled and I cannot find anything that matches my needs, which are: admin can provide templates (backgrounds) for the cards users can customise the card with text (font style and colour) users can upload their own photos (minor editing e.g. crop) to insert into the cards user can purchase a printed card via credit card payment Seeing as this kind of e-Commerce has been around for a while now, I would have thought there were some systems to purchase that can provide this functionality?

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• What grid distributed computing frameworks are currently favoured for trading systems

  - by Rich

  There seems to a quite a few grid computing frameworks out there, but which ones are actually being used to any great extent by the investment banks for purposes of low latency distributing calculation? I'd be interested to hear answers covering both windows,Linux and cross platform. Also, what RPC mechanisms seem to be favoured most? I've heard that for reason of low latency and speed, the calculations themselves are quite often written in C++/C as calculations running on VMs are several orders of magnitude slower than native code. Does this seem to be a common scenario in practice? e.g distributed .NET grid framework running calculations written in native c++/c?

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• Whats are basic things you should kept in mind while writing functional tests?

  - by piemesons

  Hello, what kind of functionality should be covered in functional test? How to prioritize what are the functionality that must be covered in functional test. I can understand it depends upon on the project, whats the functionality present the project. Lets take a example of stackoverflow. Suppose we are developing a basic working model of this. What kind of functional test must be covered in this. Just brief what the key points while writing functional tests. (taking any basic functionality from this site just to understand the reference) Still its platform independent question.I am using ruby on rails developer, but keeping ruby on rails as mind will be preferable.

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• Load balancing and scheduling algorithms.

  - by Lukas Šalkauskas

  Hello there, so here is my problem: I have several different configuarion servers. I have different calculations (jobs); I can predict how long approximately each job will take to be caclulated. Also, I have priorities. My question is how to keep all machines loaded 99-100% and schedule the jobs in the best way. Each machine can do several calculations at a time. Jobs are pushed to the machine. The central machine knows the current load of each machine. Also, I would like to to assign some kind of machine learning here, because I will know statistics of each job (started, finished, cpu load etc.). How can I distribute jobs (calculations) in the best possible way, keeping in mind the priorities? Any suggestions, ideas, or algorithms ? FYI: My platform .NET.

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• In a process using lots of memory, how can I spawn a shell without a memory-hungry fork()?

  - by kdt

  On an embedded platform (with no swap partition), I have an application whose main process occupies most of the available physical memory. The problem is that I want to launch an external shell script from my application, but using fork() requires that there be enough memory for 2x my original process before the child process (which will ultimately execl itself to something much smaller) can be created. So is there any way to invoke a shell script from a C program without incurring the memory overhead of a fork()? I've considered workarounds such as having a secondary smaller process which is responsible for creating shells, or having a "watcher" script which I signal by touching a file or somesuch, but I'd much rather have something simpler.

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• Data Warehouse: One Database or many?

  - by drrollins

  At my new company, they keep all data associated with the data warehouse, including import, staging, audit, dimension and fact tables, together in the same physical database. I've been a database developer for a number of years now and this consolidation of function and form seems counter to everything I know. It seems to make security, backup/restore and performance management issues more manually intensive. Is this something that is done in the industry? Are there substantial reasons for doing or not doing it? The platform is Netezza. The size is in terabytes, hundreds of millions of rows. What I'm looking to get from answers to this question is a solid understanding of how right or wrong this path is. From your experience, what are the issues I should be focused on arguing if this is a path that will cause trouble for us down the road. If it is no big deal, then I'd like to know that as well.

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• Instance where embedded C++ compilers don't support multiple inheritance?

  - by Nathan

  I read a bit about a previous attempt to make a C++ standard for embedded platforms where they specifically said multiple inheritance was bad and thus not supported. From what I understand, this was never implemented as a mainstream thing and most embedded C++ compilers support most standard C++ constructs. Are there cases where a compiler on a current embedded platform (i.e. something not more than a few years old) absolutely does not support multiple inheritance? I don't really want to do multiple inheritance in a sense where I have a child with two full implementations of a class. What I am most interested in is inheriting from a single implementation of a class and then also inheriting one or more pure virtual classes as interfaces only. This is roughly equivalent to Java/.Net where I can extend only one class but implement as many interfaces as I need. In C++ this is all done through multiple inheritance rather than being able to specifically define an interface and declare a class implements it.

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• Why does OSX document atoi/atof as not being threadsafe?

  - by Larry Gritz

  I understand that strtol and strtof are preferred to atoi/atof, since the former detect errors, and also strtol is much more flexible than atoi when it comes to non-base-10. But I'm still curious about something: 'man atoi' (or atof) on OS X (though not on Linux!) mentions that atoi/atof are not threadsafe. I frankly have a hard time imagining a possible implementation of atoi or atof that would not be threadsafe. Does anybody know why the man page says this? Are these functions actually unsafe on OS X or any other platform? And if they are, why on earth wouldn't the library just define atoi in terms of strtol, and therefore be safe?

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• Windows azure deployment

  - by smoothe

  I just built a simple hello world windows azure service containing just one web role, I used visual studio 2008 and Windows azure tools for VS 1.2 I am pretty new to this and I have been trying to deploy an application all afternoon now. I'm in australia and deploying in the region Asia anywhere. I have pretty much followed the info provided on MSDN and it says uploaded 95% then after about ten minutes the deployment disappears. I have tried using the old windows azure developer portal and 30minutes later I can not access the service and it's status is either busy or stopped. I have the introductory offer for an extra small compute instance on the subscription I am deploying to. Can anyone with experience with windows azure elaborate on the subject of deploying apps and the status on my application, I am very keen to get into the platform and this issue has just about spoiled my weekend.

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• Integrating Incoming Email Into a php/mysql App

  - by phirschybar

  I am looking to create an incoming email daemon switchboard that I can integrate with various remote php/mysql apps. Ideally I want to check the 'to' address to see if it is in a mysql database and if it is, have the email parsed and posted via CURL to a target destination as well as have attachments saved somewhere locally. I will likely set up a rackspace cloud server dedicated to this task (just accepting emails and posting to 3rd party APIs). However, I do not know where to start. Which server platform / distribution should I go with? Which software needs to be customized, etc?

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• C/C++ GUI framework to create distinctive window style

  - by genesys

  Hi! Can someone please tell me a GUI framework (for Windows. doesn't need to be cross platform) that allows me to specify the design of the UI elements very precisely? For example, the Windows and UI elements of Adobe products look different than other Windows applications. I'm looking for a framework that would allow me to create a GUI in that style - or any other style I invent, from the shape of the window, to the visual appearance of any scrollbar, button minimize/maximize buttons and so on. any recommendations? Thanks!

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• Animate 3D model programmatically-where to start?

  - by amile

  I am having a task to create a 3D model face that can talk like humans.without having any knowledge about 3D modeling. I have no clue where to start.I have searched a lot and find some of these things.OpenGL,WebGL,XNA and other similar tool can be helpful. please guide me where to start a step by step approach and which platform is better as i have programming background in JAVA. here is an idea what I need to do https://docs.google.com/viewer?a=v&pid=gmail&attid=0.2&thid=13f65486a46a1f67&mt=application/pdf&url=https://mail.google.com/mail/?ui%3D2%26ik%3D49f1f393c6%26view%3Datt%26th%3D13f65486a46a1f67%26attid%3D0.2%26disp%3Dsafe%26realattid%3Df_hi6ylzbv2%26zw&sig=AHIEtbQc8KQNHdprmEnL4UXyD3ox8vlKKQ

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• Challege: merging csv files intelligently!

  - by Evenz495

  We are in the middle of changing web store platform and we need to import products' data from different sources. We currently have several different csv files from different it systems/databases because each system is missing some information. Fortunatly the product ids are the same so it's possible to relate the data using ids. We need to merge this data into one big csv file so we can import in into our new e-commerce site. My question: is there a general approach when you need to merge csv files with related data into one csv file? Are there any applications or tools that helps you out?

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• Are macro definitions compatible between MIPS and Intel C compiler?

  - by Derek

  I seem to be having a problem with a macro that I have defined in a C program. I compile this software and run it sucessfully with the MIPS compiler. It builds OK but throws the error "Segmentation fault" at runtime when using icc. I compiled both of these on 64 bit architectures (MIPS on SGI, with -64 flag and icc on an intel platform). Is there some magic switch I need to use to make this work correctly on both system? I turned on warnings for the intel compiler, and EVERY one of the places in my program where a macro is invoked throws a warning. Usually something along the lines of mismatched types on the macro's parameters (int to char *) or some such thing.

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• 64 bit COM(ActiveX) server

  - by Velja Radenkovic

  Hello, I have activex server exe that was building and registering fine on 32bit OS. I wanted to make 64 bit version of that exe by upgrading project to Visual Studio 2010 and changing platform to X64 which apparently doesn't work. Application itself works but I don't see it registered after running That.exe /RegServer I would appreciate any usable advice on migrating activex from 32 to x64. Code that is processing /RegServer param is below: if(lstrcmpi(lpszToken, _T("RegServer")) == 0) { _Module.UpdateRegistryFromResource(IDR_OUTDISKSARG, TRUE); nRet = _Module.RegisterServer(TRUE); bRun = false; break; } 32 bit activex is unuable for me since I have to load it in x64 .NET process.

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• Android Source code download error

  - by user351850

  Hi all I have followed the instructions on the Android website on how to download the latest android source code files but it gives errors when i run this command: repo init -u git://android2.git.kernel.org/platform/manifest.git It gives the following error: Getting repo ... from git://android.git.kernel.org/tools/repo.git android.git.kernel.org[0: 199.6.1.176]: errno=Connection refused android.git.kernel.org[0: 130.239.17.12]: errno=Connection refused fatal: unable to connect a socket (Connection refused) On checking forums for its resolution, i was told that port 9418 was being blocked. I use Ubuntu 10.04 and ensured that the firewall wasnt blocking the port and also enabled the port and the above IP addresses. I also spoke to the networking peeps who ensured that no traffic from the internet is being blocked. I would be glad if i could get directions on how to proceed next. Many thanks as you respond. Saheed.

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• From C# to JAVA

  - by Newbie

  Hi all, I don't know whether this is a valid question to ask here or not, but I made an attempt. I am basically a C# guy. But since the last 7 days I have been asked to work in java (J2SE 1.4) and I am working in that. and gradually I am finding interest in that. I want to learn more about it and since I am finding a lot of similarity between C# and Java(what ever I have gleaned + worked so far in those 7 days), I am planning to steer my career in that. But having spent for more than 2 years in C# and then moving to java, will it be a problem in future (say after 3/4 months) if I need to change my job.. I mean my most of the exp. lies in C# and just started JAVA. so how the technical panel will accept me if I need to change the platform? Thanks

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• How do I choose a database?

  - by liamzebedee

  I need a comparison table of some sort for database varieties (MySQL, SQLite etc.). I can't find one. My use case is, I am implementing storage of objects in a distributed hash table. I need a database solution that is: Fast for sorting Simplistic (no users, preferably no additional structures like multiple tables etc.) Concurrent (if possible) Multi-platform File based (not stored in memory primarily) Centralized I will be programming in Go. As I understand, I believe I need what is called a Document Orientated Database, because I am storing objects, identified by keys. EDIT: While I am implementing a DHT, I will also be storing metadata about the objects, such as access counts etc. It would also be preferable to have TLL (time to live)

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• What segments does C compiled program use?

  - by b-gen-jack-o-neill

  Hi, I read on OSDev wiki, that protected mode of x86 architecture allow you to create separate segments for code and data, while you cannot write into code section. That Windows (yes, this is the platform) loads new code into code segment, and data are created on data segment. But, if this is the case, how does program know it must switch segments to the data segment? Becouse if I understand it right, all adress instructions point to the segment you run the code from, unless you switch the descriptor. But I also read, that so colled flat memory model allows you to run code and data within one segment. But I read this only in connection to assembler. So, please, what is the case with C compiled code on Windows? Thanks.

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• java memory usage

  - by xdevel2000

  I know I always post a similar question about array memory usage but now I want post the question more specific. After I read this article: http://www.javamex.com/tutorials/memory/object_memory_usage.shtml I didn't understand some things: the size of a data type is always the same also on different platform (Linux / Windows 32 / 64 bit)??? so an int will be always 32 bit?; when I compute the memory usage I must put also the reference value itself? If I have an object to a class that has an int field its memory will be 12 (object header) + 4 reference + 4 (the int field) + 3 (padding) = 24 bytes??

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• Detect if PCRE was built without the --enable-unicode-properties or --enable-utf8 configuration switches

  - by Mark Baker

  I've a PHP library that uses a number of regular expressions featuring the \P expressions for multibyte strings, e.g. ((((?:\P{M}\p{M}*)+?)|(\'[^\']*\')|(\"[^\"]*\"))!)?\$?([a-z]{1,3})\$?(\d+) While this works on most builds, I've had a few reports of the regexp returning an error. Depending on Operating platform, the error messages from PCRE are: Compilation failed: PCRE does not support \L, \l, \N, \P, \p, \U, \u, or \X at offset n or Compilation failed: support for \\P, \\p, and \\X has not been compiled at offset n I know that I can probably test a regexp at the beginning of my code that uses \P, and trap for a returned error, then use that response to set a compatibility flag and provide a degraded (non UTF-8) regexp without the \P within the main body of my code based on that compatibility flag; but I was wondering if there was any simpler way to identify whether PCRE had been built without the --enable-unicode-properties or --enable-utf8 configuration switches. PHP provides access to PCRE_VERSION constant, but that won't help identify whether \P support is enabled or not.

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• Getting meaningful error messages from fstream's in C++

  - by Hassan Syed

  What is the best way to get meaningful file access error messages, in a portable way from std::fstreams ? The primitiveness of badbits and failbits is getting to be bit annoying. I have written my own exception hierarchies against win32 and POSIX before, and that was far more flexible than the way the STL does it. I am getting "basic::ios_clear" as an error message from the what method of a downcasted catch (std::exception) of a fstream which has exceptions enabled. This doesn't mean much to me, although I do know what the problem is I'd like my program to be a tad more informative so that when I start deployment a few months later my life will be easier. Is there anything in Boost to extract meaningful messages out of the ofstream's implementation cross platform and cross STL implementation ?

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• Java application failing on special characters.

  - by Scottm

  An application I am working on reads information from files to populate a database. Some of the characters in the files are non-English, for example accented French characters. The application is working fine in Windows but on our Solaris machine it is failing to recognise the special characters and is throwing an exception. For example when it encounters the accented e in "Gérer" it says :- Encountered: "\u0161" (353), after : "\'G\u00c3\u00a9rer les mod\u00c3" (an exception which is thrown from our application) I suspect that in order to stop this from happening I need to change the file.encoding property of the JVM. I tried to do this via System.setProperty() but it has not stopped the error from occurring. Are there any suggestions for what I could do? I was thinking about setting the basic locale of the solaris platform in /etc/default/init to be UTF-8. Does anyone think this might help? Any thoughts are much appreciated.

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• Sending passwords over the web

  - by Falmarri

  So I'm working on a mobile platform application that I'd like to have users authenticate over the web. I was wondering the best way to do security. The user is sending a password for HTTP to a php server wich authenticates against a mysql database on the same server. Obviously I don't want to send the password in plain text over the internet, but I also don't want to do 2 SHA hashes. This is what the server looks like (in pseudocode) $pass = $_POST['pass']; if ((get PASSWORD where USERNAME = USERNAME) == SHA($pass)) return PASS; This is pretty standard and I don't think there's any other way to do this. But I was wondering how I should prepare the data before sending it over the internet.

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• Fault address when malloc/free pthread_t across threads

  - by scleung

  Fault address occurred when i malloc pthread_t to save a newly created thread id and free it in another thread. Codes as follows: typedef struct _TaskInfo { // int dummy_int; pthread_t tid; } TaskInfo; void* dummy_task(void* pArg) { free(pArg); return NULL; } void create_task() { TaskInfo *pInfo; pthread_attr_t attr; // set detached state stuff ... pInfo = (TaskInfo*) malloc(sizeof(TaskInfo)); pthread_create(&pInfo->tid, &attr, dummy_task, pInfo); // destroy pthread attribute stuff ... } int main() { int i; while(i < 10000) { create_task(); ++i; } return 0; } When I uncomment the member dummy_int of TaskInfo it sometimes ran successfully, but sometimes failed. My platform is VMWare + Ubuntu 9.10 + ndk r3 Thanks!

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