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  • What's the reason exceptions are heavily used in managed (C# and Java) languages but not in C++? [on hold]

    - by ZijingWu
    AFAIK, a lot of C++ projects don't allow exceptions and deny them in coding guidelines. I have a lot of reasons, for example, exception is hard to handle correctly if your binary needs to be compiled by separate and different compilers. But it doesn't fully convince me, there is a lot of projects which are just using one compiler. Compared to C++, exceptions are heavily used in C# and Java and the reason can only be that exception are not bringing enough benefit. One point is debugbility in practice. Exception can not get the call stack in C++ code, but in C# and Java you can get the call stack from exception, it is significant and makes debugging easier. No-callstack is not the fault of the exception, it is the language difference, but it impacts the exception usage. So what's the reason that exceptions are frowned upon in c++ programs?

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  • The Properties dialog box not working for any Start Menu Program Lubuntu 14.04

    - by user236378
    When Lubuntu 14.04 first came out, the Properties dialog was present for all Start Menu Programs but did not work when right-clicked on as nothing happened and no other box popped up the the Start Menu Program information, such as the executable info, etc. Then the issue was fixed. Now the issue has returned when I upgraded to Lubuntu 14.04.1. Is there any way to retrieve the Properties info pop-up box via a configuration file? Does the issue have to do with a faulty LXShortcut? I noticed when I uninstalled the LXShortcut the Properties tab disappeared. When I re-installed the Properties tab returned however once again when you right-click on the Properties tab nothing happens. Any assistance would be greatly appreciated. Thank you.

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  • What payment processors fullfill this requirements and what are their pluses and minuses? [on hold]

    - by Sharen Eayrs
    Accept credit card Allow me to automatically credit a customers' account. We're not selling e-book. We're selling a credit to our account. So it's important that customers do not get credited twice. Easy to program and integrate with our sites. Have affiliate programs. Transfer money to bank accounts quickly Accept merchants from many countries No monthly fee is a plus. I am thinking of using 2co.com avangate.com clickbank.com Some people reccomend https://stripe.com/us/features (is it easy to implement) http://www.paymentwall.com/ There are so many payment processor I am very confused. Can anyone tell me pluses and minuses of those ones. or perhaps others. What would be the plus and minuses of those 3 that you know off

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  • phishing attack. Where do I start the cleanup?

    - by Suz
    I'm a newbie webmaster. I've got a domain and a site... and no clue about the web (I'm OK with files and programs... ) I got a message from google that my site is a possible phishing site, with a link the the suspect page: http://www.mydomain.com/~phishers/Paypal/us/Confirm.php needless to say, I didn't put that up. Can someone point me to a good tutorial on what to do now? I'd like to figure out what happened so I can defend against it the next time around. How do I identify what kind of attach this is? Also, what is the tilde doing in the URL path? I couldn't find any path like this on my hosting account, so I'm not entirely sure how to delete it.

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  • Edubuntu - Java Iced Tea and Carnegie Learning

    - by user95864
    I've recently built a computer lab running various forms of Ubuntu. I'm testing out Edubuntu to see if it is a better fit for our school, but I'm running up against a problem I can't resolve. One of the programs we use is Carnegie Learning Online, a Java program that I've managed to get working on both Ubuntu 10.04 and 12.04. After updating Java (all distros), when you access the website a .tt applet file is downloaded. With Java installed you can select the IcedTea plugin to open it. On 10.04/12.04, this then opens a new window, Java runs a setup of some sort, and then a new window with the Carnegie program opens. On Edubuntu however, once you've told IcedTea to run it....nothing happens. No errors, just nothing. I've tried this with an older update of Java as well as the newest. Any ideas?

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  • Deactivate one graphicdevice in a SLI system

    - by NobbZ
    As it is now, I have a Gaminglaptop with 2 GeForce 9800M GT with SLI activated, Ubuntu 12.04. When I use any graphicdriver that is aware of acceleration features the system crashes after a short period of time. After I removed and purged jockey my system runs stable but slowly, but I can use it for now (I have to choose recovery at startup and the resume boot, botting up normal results in a colorflickering screen). But since the system is runs slowly, I would like to try to work with only one graphicdevice. First test device A, if that doesn't work test with device B. A testing tool for Windows already told me, that one of the cards doesn't work properly, but it doesn't say which one (same crashes in Windows when programs or desktop uses acceleration). Therefore I wanted to ask, if there is a way to reinstall any nVidia (or third party) driver, deactivate one of the two devices and test the stability?

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  • Size mismatch error while downloading packages [closed]

    - by Nammi-namm
    I've been having this annoying problem lately since I upgraded from Linux Mint 9 to Ubuntu 12.04. It started when I was installing VLC from the Ubuntu Software Centre a few weeks ago. I kept getting this error with packages with "Size mismatch". This happened with many other programs later on. I just got around it by downloading the packages separately and installing them that way. Now I get two updates for packages I installed in that manner. I tried changing from where I download the packages, it didn't change anything. If anyone can help me with my issue it would be splendid. Screen shot below: http://i1078.photobucket.com/albums/w499/Nammi-namm/Screenshots/Screenshotfrom2012-07-02035645.png

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  • Performance impact of the new mtmalloc memory allocator

    - by nospam(at)example.com (Joerg Moellenkamp)
    I wrote at a number of occasions (here or here), that it could be really beneficial to use a different memory allocator for highly-threaded workloads, as the standard allocator is well ... the standard, however not very effective as soon as many threads comes into play. I didn't wrote about this as it was in my phase of silence but there was some change in the allocator area, Solaris 10 got a revamped mtmalloc allocator in version Solaris 10 08/11 (as described in "libmtmalloc Improvements"). The new memory allocator was introduced to Solaris development by the PSARC case 2010/212. But what's the effect of this new allocator and how does it works? Rickey C. Weisner wrote a nice article with "How Memory Allocation Affects Performance in Multithreaded Programs" explaining the inner mechanism of various allocators but he also publishes test results comparing Hoard, mtmalloc, umem, new mtmalloc and the libc malloc. Really interesting read and a must for people running applications on servers with a high number of threads.

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  • Database for Ubuntu

    - by Toby J
    I am trying Ubuntu 12.04 booted from a DVD disk before I install it. I currently havwe windows 8 (which I hate) and I have a couple of Data base programs with my movies, hundreds of movies, in them. Is there a database available for Ubuntu that is compatible with Microsoft Database? There are too much data in the current database file for me to have to rewrite the program. So far, I love the Ubuntu 12.04. I have been able to access my microsoft works spreadsheet files and documents with no problem. And I like the thuderbird email and just about everything else about Ubuntu 12.04. I just need to be able to access my database files and to write lables and envelopes. Thanks. Toby J Paris, TN

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  • When profiling a function for time use, what information is desirable?

    - by AaronMcSmooth
    I'm writing a program similar to Python's timeit module. The idea is to time a function by executing it anywhere from 10 to 100,000 times depending on how long it takes and then report results. I've read that the most important number is the minimum execution time because this is the number that best reflects how fast the machine can run the code in question in the absence of other programs competing for processor time and memory. This argument makes sense to me. Would you be happy with this? Would you want to know the average time or the standard deviation? Is there some other measure that you consider more important?

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  • How do i get my taskbar back?

    - by tarrasch
    when i restarted my Ubuntu workstation after a crash of firefox my taskbar disappeared. what program do i need to start to get it back? what could be the reason for this? thanks edit: I mean the bar at the bottom of the screen, where the programs that are currently open are displayed. Also i remember i could switch from one virtual screen to the next one there. At the very right, there was a button on it that would minimize all windows and show the desktop.

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  • I think I deleted my windows

    - by Deltak
    I tried to intall backtrack using a bootable cd. I think I clicked the option and it overwrote my windows 7. How do I get that back? I do not have a windows restore cd. Backtrack did not actually install at the time it stated there was a problem at 24% I then tried to get into Windows after shutting down and OS never booted up again. Does this mean I lost all my documents and programs? Can I call the company that sold my laptop to and get a bootable CD? Thank you.

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  • Needs management tool for .java files

    - by Chris Okyen
    When I open the src file in the project folder in Package Explorer in Eclipse, it says the following: Error retrieving content description for resource '/GuiAdd/src/GuiAdd.Java.' Now, the directories of the source projects shown in Eclipse Package explorer doesn't always have the source file to link to, causing this message. I need a way to sync the folders in the correct directory without overwriting the newest ones. Some source files I project files of the root which the Package explorer links to may be the correct versions but other source files in the root may not have the latest source or any source. I am not using svn/git or other depository programs.

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  • How can I programmatically block user input for a given time?

    - by black_puppydog
    As a person working in computer science working offline to avoid facebook and thelike is not always (meaning hardly ever) possible for me since I mostly have to be online to work. I have tried leechblock and similar things but the problem becomes that at some point I start making systems for myself to hack, which is kind of pointless if oyu have root. I would very much like to try out the method described here. (Short version: reboot your PC every time finish a task or get bored with it) Unlike for the author of this blog my work is mainly done not in screen sessions but in IDEs ans other not-so-fast-to-start-up stuff, meaning a full reboot including loading all my programs will take its time. So, the question is: How can I block all user input and preferrably blank the screen for a given amount of time? The idea would then be to have a keyboard shortcut to activate the script/program (which would probably also have to have root i guess?)

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  • Internet TV streaming applications

    - by mark kirby
    Are there any programs for Ubuntu that can pull TV streams from the Internet ? For example like on a blu-ray player you get BBC iplayer and hulu and youtube as apps, so is there an application that can do this ? I know XMBC can but its to fiddly and resource hungry, I just want the net TV apps and not the full media center. Boxee was great for this, it was a media center but had an interface for the apps not just sticking them in some strange menu like XBMC. Please let me know of anything you know of

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  • How to get Skype's indicator on 12.04 [closed]

    - by herpson
    Possible Duplicate: How do I get the Skype status icon back? (on panel/tray) After upgrading to 12.04 (64bit), I've started installing the programs that I used to have on 10.04, one of them is skype. Downloaded the .deb file from Skypes website and installed it using the Ubuntu software center. However, when I launch skype, it doesnt add an indicator to the top menu like it used to, which means that when I click the 'x' on the program's window, it goes away, I cant reopen it, and I'm still logged in. How can I get the indicator back? Thank you

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  • Javascript Only Search Method [on hold]

    - by user2118228
    I need to put a search function on a website that is going to be on a CD-ROM with no access to the internet. It has 80 pages, and about 500 'items', so I'd prefer to not have to hard code 100's of 'if statements if possible. I've found a few programs you can buy that will index and generate results (Zoom Search, JSS Index, The German Guys') but there are odd quirks with each one. Plus I would rather code it myself to get complete control over it, and to really understand what it's doing. Basically searching for a few words would display the product image and description; clicking on that would take you the related URL. This is kind of complicated, I can't find an easy solution not dealing with hundreds of if Statements. Has anyone ever created anything like this or know a better method? I'm not really sure a better way to go about this. I've used PHP/MYSQL for search results before, but this cannot run any php.

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  • How can I implement full disk encryption for a disk containing Ubuntu with plausible deniability?

    - by Rupert
    I would like to have a disk that: has Ubuntu installed is fully encrypted is setup in such a way as to make denial of the existence of the Ubuntu install plausible Truecrypt provides the last two features but only for Windows: http://www.truecrypt.org/docs/?s=sys-encryption-supported-os The alternate installer for Ubuntu provides the first two features but not the last. I imagine that plausible deniability would be achieved by, at least: Having two installs of Ubuntu and 2 passphrases (or keyfiles) which would unencrypt each one. Moving any unencrypted data (such as /boot) onto a USB stick Are there any programs out there which support this feature set for Ubuntu?

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  • What is the current frequency of my processor (CPU-Z equivalent)?

    - by Anake
    Is there a ubuntu program like CPU-Z which will show me the actual frequency of my processor? I do a fair amount of scientific computing which leads to me running my programs for up to 10 hrs. To alleviate this problem a little I overclock my CPU. However I can't see what the actual clock of my processor from within ubuntu which means I either have to restart and look at the bios or load into windows. If there was an applet or command line command to find out this information it would be very helpful. Thanks for your help

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  • How to get started with programming

    - by S.M.
    I have never programmed before. In the 5th grade, I did write very elementary programs using BASIC and that was 7 year back. I wish to learn how to program and I was wondering if someone could please suggest how to get started. For example, I do not know enough to form a judgement on what language should be appropriate to get started. What programming language would you suggest to get started with programming? What are the resources to learn the language you recommend.

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  • Is it practically useful to decline GUI for a newbie in Ubuntu?

    - by Kifsif
    My Ubuntu is 12.04. I have just started learning Linux and Ubuntu in particular. To remember commands quicker, I'd like to decline GUI. But there are some problems. I don't know where installed programs are to launch them. For example, I have a pdf file. I know that there is a program to view such files. Should it be the case of GUI, I would just click on the pdf-file, and have a look that I use Document Viewer 3.4.0. Then I would like to launch Firefox Web Browser. Even if I know it is installed, how to find the file to be launched using just CLI is a mystery to me. Could you suggest me anything.

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  • How to resolve ambiguous key sequence?

    - by Rob Mosher
    Using BasKet, I get the following message: Ambiguous Shortcut Detected The key sequence 'Ctrl+1' is ambiguous. Use 'Configure Shortcuts' from the 'Settings' menu to solve the ambiguity. No action will be triggered. 'Ctrl+1' is shown next to 'To-Do' under the 'Tags' menu. If I look in 'Configure Shortcuts' I don't find Ctrl+1 assigned to anything (the tag shortcuts aren't listed at all, leading me to believe their assignment is hard coded). I looked under 'System Preferences Keyboard Shortcuts' and also searched through CompizConfig, but didn't find anything there that might conflict. How do I resolve this keyboard shortcut issue? I'm guessing the particular program or key sequence isn't too important. It looks like it happens with a number of KDE programs (sadly I haven't seen a solution).

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  • Xubuntu and other Debian based distros slow

    - by William V
    I have a Compaq Presario SR1950NX desktop computer with the AMD64 3800+ processor and 1GB ram and it seems that Ubunutu, Xubuntu and Lubuntu are all laggy. Things seem to be slow such as clicking on menus and opening programs and the UI renders in peices. When using the browser the system slows down considerably. I ran the TOP command and I do notice that xorg hits 30 to 40 percent cpu when running the browsers. I have tried these distros on a spare P4 machine and it is even worse. As long as I don't have a several things open at one time I can manage to get around although sluggishly. I also notice that I can't get debian based distros to install in 64bit (crtc6 failure) only in 32bit. Can anyone tell me what is it that I might be doing wrong? I have an integrated Nvidia card and have tried several of the recommended drivers which sometimes result in no boot screen upon reboot. Thanks

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  • Implementing Custom Software or Using Ready Softwares at Industy at Machine Learning Area? [closed]

    - by kamaci
    I am studying on Machine Learning and its implementations. I have different choices in front of me for my future. Testing algorithms by some tools as like Weka and finding best approach and after that implementing it(maybe with using some libraries at Machine Learning) On the other hand I see that there are softwares as like SPSS, SAS etc. Instead of improving myself like that should I learn that kind of programs. Do I reinventing the wheel or if I improve myself and implement custom solutions to customers then can I be a part of industry?

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  • Which software should I use on Ubuntu to create a Windows XP LiveUSB? [closed]

    - by user92241
    Possible Duplicate: How to create Windows XP LiveUSB using Ubuntu to replace it Since many programs that I need only work on XP, I need to install Windows XP on my 2 laptops but I can't use an optical drive, which makes using a USB the only option. If it helps, I can tell you that I used to have Vista and Windows 7 on my 2 laptops but I clean installed Ubuntu 12.04 on one, and Lubuntu on the other. Also I have no trace of Windows left on any of my laptops, when I bought my laptops they came without a Windows CD, so I only had a 20GB partition on my hard drives (which I formatted when I clean installed Ubuntu and Lubuntu.) Also, I have no problem with clean installing Windows XP and the reinstalling Ubuntu/Lubuntu so I can dual boot. Thanks! Edit: I have a ISO file ready, on a USB.

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