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  • Why is the volatile qualifier used through out std::atomic?

    - by Caspin
    From what I've read from Herb Sutter and others you would think that volatile and concurrent programming were completely orthogonal concepts, at least as far as C/C++ are concerned. However, in GCC c++0x extension all of std::atomic's member functions have the volatile qualifier. The same is true in Anthony Williams's implementation of std::atomic. So what's deal, do my atomic<> variables need be volatile or not?

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  • Ubuntu root privs installation issue

    - by Pam
    I am a fairly new Ubuntu user (and Linux user, for that matter) and I just downloaded a program whose installer was a .sh file. Not thinking, I copied the installer to an /opt subdirectory, thinking that I was going to install the application there: sudo cp ~/Downloads/fooInstaller.sh /opt/someDir I can't remember, but I either had to use sudo because /opt required it, or I just used it without thinking, but in any case, I prefixed with sudo. Once in /opt/someDir, I executed the installer again, using sudo: sudo sh fooInstaller.sh The terminal went crazy, and a few seconds later, a graphical install wizard popped up that guided me through the rest of the process. At the end of the wizard I was prompted to launch the program, and I did, and everything was great. Until... I closed the program, and attempted to add it to my Ubuntu "panel" (the icon panel at the top of the screen). The program was installed to /usr/local/foo/theProgram, and so I specified that URL as the command in the custom app launcher. When I open the program through the panel/launcher (at the top of the screen), the program doesn't load or operate correctly. I get a lot of error messages complaining about being denied permissions. I'm assuming that this is a "superuser/installation/privs" issue, and not a problem with the application (hence this post at superuser.com instead of the application's forums), because when I launch the program from the terminal with sudo, it opens and executes perfectly fine, just like it did the first time around after the install wizard finished. I realize I'm probably going to have to uninstall the program completely, and re-install it differently. Finally, my question: After uninstalling, can I avoid all these issue by just running the installer (sh fooInstaller.sh) right out of my Downloads directory, sans the sudo prefix? If not, how do I get the program to install without root privs so that I can add it to my panel/launcher and get it executing correctly? Sorry for the long post but I didn't want to omit any details because, as I'm sure you can tell, I'm not really sure I know what I'm doing. Thanks for any help here!

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  • Getting started with F#

    - by Ian Quigley
    What's a good way to get into F# programming? What's a good "Hello world" example and what simple examples can show me why I want to use it over C#. Also what tools do I need? I have WindowsXP, Visual Studio 2008 etc.

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  • TreeView Controls - HTREEVIEW

    - by nXqd
    I'm new to win32 API programming and I try to understand source code of treeview from codeproject. But I really don't understand this : BOOL TreeView::DoNotify(HWND hWnd, UINT msg, WPARAM wParam, LPARAM lParam) { // blah blah HTREEVIEW Selected = (HTREEITEM)SendDlgItemMessage(hWnd,ID_TREE,TVM_GETNEXTITEM,TVGN_CARET,(LPARAM)Selected); // halb halb } It doesn't work ( Selected is used without initializing) until I declare Selected as global variable. Thanks for reading this and I need your help .

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  • Scripting Languages vs. Compiled Languages for web development

    - by Austin Hyde
    Though I come from a purely PHP background on the web development side of programming, I have also spent much time with C# and C++ on the desktop. I don't really want to spark any flame wars, but: When should you use scripting languages over compiled languages for website development? (and vice versa) Just to clarify, for the sake of this question, I define a "scripting language" to mean an interpreted language like PHP, Python, or Ruby, and a "compiled language" to mean a strongly typed, compiled language like C#, C++, Java, or VB.

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  • reading binary datafile and writing into decimal no file

    - by swaroop b banerjee
    exp data is generated by my mc scaler card as a binary file with first 511 bytes as header and then 24 bit data followed by four bit roi data. i am not a expert in programming. i do understand a little. I would like to convert this file into a file (without header) decimal nos with first col as channel no (1 to 8191) then the data (24 bit) then the Roi data (4 bit). I am looking for source code in c or qbasic. thanks

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  • Messed up USB stick doesn't show in blkid

    - by Felix
    I was playing around with a USB stick (booting archlinux with qemu off of it and trying to perform an installation on the same stick at the same time -- brave, I know, but I was just messing around). Now, after failing to boot and install at the same time, it seems I have sort of messed up my stick. What I think happened is that I used cfdisk to wipe everything on it and create one big partition, but formatting it then failed, so now there's a big partition with no filesystem. Just to make it clear: I'm not worried for my stick, I know I can recover it at any point. What I find intriguing is that after plugging the stick into my computer (using Ubuntu), there's no (terminal) way to find out what block device (/dev/sdx) it has associated. The only way I could determine that was with GParted: But blkid shows the following: /dev/sda1: UUID="12F695CFF695B387" LABEL="System Reserved" TYPE="ntfs" /dev/sda2: UUID="A0BAA6EABAA6BC62" TYPE="ntfs" /dev/sdb1: UUID="546aec8b-9ad6-4571-b07a-adba63e25820" TYPE="ext4" /dev/sdb2: UUID="2a8b82d8-6c6e-4053-a446-bab970d93d7c" TYPE="swap" /dev/sdb3: UUID="7cbede7d-c930-4e59-9d1b-01f2d79bd092" TYPE="ext4" No trace of /dev/sdc. My question is: if I didn't have a graphical interface (to use GParted), how would I have known which block device is my stick?

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  • Python Mindstorms RCX

    - by Kyle Schmidt
    I've got 30 unopened Lego Mindstorms kits that I'd love to use in my intro programming class to do some simple robotics stuff at the end of the year. We're using Python in the class, so I'd prefer there to be a way for the kids to write the programs in Python. Unfortunately, these are old kits with RCX bricks - not the newer NXT ones, so most of the projects like NXT_Python can't help me. Is there any way to make that happen?

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  • How do you write your QTP Tests?

    - by Josh Harris
    I am experimenting with using QTP for some webapp ui automation testing and I was wondering how people usually write their QTP tests. Do you use the object map, descriptive programming, a combination or some other way all together? Any little code example would be appreciated, Thank you

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  • How to export image from Air app directly into a powerpoint slide programmatically

    - by user306584
    Apologies if this has been answered before or if it's too obvious - pointers are greatly appreciated if this is the case. What I'm trying to do: 1) have a way to save / copy screenshot from an Air app 2) automatically paste such screenshot into a new powerpoint slide in the current presentation I have part 1 down but have no idea on how to do part 2 - I have very little experience with programming around MS apps. thank you. f

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  • Is LuaJIT really faster than every other JIT-ed dynamic languages?

    - by Gabriel Cuvillier
    According to the computer language benchmark game, the LuaJIT implementation seems to beat every other JIT-ed dynamic language (V8, Tracemonkey, PLT Scheme, Erlang HIPE) by an order of magnitude. I know that these benchmarks are not representative (as they say: "Which programming language implementations have the fastest benchmark programs?"), but this is still really impressive. In practice, is it really the case? Someone have tested that Lua implementation?

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  • Resources for learning Monads, Functors, Monoids, Arrows etc

    - by Dony Borris
    Can you people please suggest some good books / weblinks from where I can get to learn about above mentioned concepts? (Please note that I am a Java programmer and have NO prior experience with functional programming. I have been studying Scala since last one month and would appreciate the resources that try to teach the above mentioned concepts with Scala. (or even Java, if posible))

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  • Learning XNA for Game Development. Is it worth It?

    - by Nipuna Silva
    It seems that most of the popular games in the world are developed using C++. But Microsoft's game platform, XNA Studio is based on programming in C# and I didn't find any popular game which was developed using XNA. Also there are fewer Ebooks you find on XNA and even the google search for a problem won't give you much help. Does people doesn't use XNA as a gaming platform? Is it worth learning XNA for game development or should I consider some other platform?

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  • Any good open source online RPG starter kit for development ?

    - by Andrew Sky
    Hi there, Does anyone know of a good open source toolkit that allows level designer and graphic designer or someone with basic programming experience to create multiplayer online Role Playing Game ? The game can be a simple 2D interface in a 2d virtual world. I know Microsoft have a starter kit something like the following : http://creators.xna.com/en-US/starterkit/roleplayinggame that allows developer to create RPG game running on XBox platform but i am looking more on multiplayer role playing game on the web platform where player can play directly with their browser. regards Andrew

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  • Objective-C Array/List Question

    - by Dave C
    What is the best practice, even in general programming, when you have an undefined, possibly infinite, amount of items that you need in an array but don't have defined bounds. Can you define an endless array in objective c that you can keep pushing items onto, like other lanaguages have a list item. Thanks for any help.

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  • Object Orientated PHP books

    - by user275074
    Hi, I've realised just how rusty my knowledge of PHP 5 and advanced PHP programming is after completing some questions for a test. I seriously need to read a book or something. Any recommendations for PHP 5 books?

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  • Recommended Clang command line options

    - by frou
    The Manual for Clang seems to be work in progress, so could you help me formulate the definitive command line options for compiling ANSI-C (AKA C89, C90) with maximum strictness and relevant/helpful warnings? Clang is a compiler front end for the C, C++, and Objective-C programming languages. It uses the Low Level Virtual Machine (LLVM) as its back end. It is still under development. Its goal is to offer a replacement to the GNU Compiler Collection (GCC)

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  • Allow access to my server.

    - by Zachary Brown
    I have a server, did some of the programming myself. It ison my home network, but I need to be able to access it from anywhere over the internet. I have done the port forwarding like I am supposed to, but I still cant get to it from an outside computer. It just displays Internet Explorer cannot display the webpage. I don't know what else to do. I am on a Linksys WRT54G v8 router running ddWRT v24 micro firmware.

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  • Read/Write operation on Fat table with out using System.IO in C#

    - by AZHAR
    Hi i am new to the system programming...i want to read information from fat table like total sector,total physical drive,containing logical drive types and as well containing files in the drives(like their file size,when accessed)with all information of files..and then display of these files with respect of their hierarchy at GUI. this is easy if we use System.IO namespace.but it is restricted for me.so please help

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