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  • Programming language specific package management systems

    - by m0nhawk
    There are some programming languages for which exist their own package management systems: CTAN for TeX CPAN for Perl Pip & Eggs for Python Maven for Java cabal for Haskell Gems for Ruby Is there any other languages with such systems? What about C and C++? (that's the main question!) Why there are no such systems for them? And isn't creating packages for yum, apt-get or other general package management systems better? UPD: And what about unification? Have someone tried to unify that "the zoo"? If yes, looks like that project didn't succeed.

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  • Restoring Virtualbox machine images from old hard drive

    - by memilanuk
    I recently replaced the HDD in my laptop, and re-installed Windows & Ubuntu. Now I want to restore the various virtual machines I had set up on the old HDD, which is mounted in an external USB enclosure. I can read the HDD okay, and the 'bad' spots seemed to be in the Windows partition... but whenever I try to restore the VDI files the copy errors out. I've tried drag-n-drop in Nautilus, I've tried grsync, etc. Always bombs out on the VDI files. I've copied over multi-GB dvd iso images with no problem, but the VDI files always fail the checksums. Any ideas? TIA, Monte

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  • Ruby installed on Ubuntu 10.10 slow on one machine but not other

    - by Aaron Jensen
    I have a machine that was provisioned several months ago. RVM was used to install ruby 1.9.3-p125 as well as 1.9.3-p125-perf. When I compared raw ruby performance to another identical machine the older machine smoked them. For example: ================================================================================ With in-block needle calculation ================================================================================ Rehearsal ---------------------------------------------- detect 3.790000 0.000000 3.790000 ( 3.800895) each 2.410000 0.000000 2.410000 ( 2.420860) any 3.960000 0.000000 3.960000 ( 3.972099) include 1.440000 0.000000 1.440000 ( 1.442862) ------------------------------------ total: 11.600000sec vs ================================================================================ With in-block needle calculation ================================================================================ Rehearsal ---------------------------------------------- detect 10.740000 0.000000 10.740000 ( 10.769366) each 6.080000 0.010000 6.090000 ( 6.106323) any 10.600000 0.000000 10.600000 ( 10.641606) include 4.160000 0.000000 4.160000 ( 4.171530) ------------------------------------ total: 31.590000sec I attempted to reinstall 1.9.3-p125 with rvm on the fast machine and that ruby is now slow. It's as if something changed in RVM, or I installed some package that made compiled versions of ruby perform significantly worse. I know this is a tough question to answer, but what things should I look into in order to track down why the performance has suffered so much? edit I just attempted to install with ruby-build and the version installed was fast. Something rvm is doing to build it in my environment is slow.

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  • Why do programming language (open) standards cost money?

    - by fish
    Isn't it counter-productive to ask for 384 Swiss franks for C11 or 352 Swiss franks for C++11, if the aim is to make the standards widely adopted? Please note, I'm not ranting at all, and I'm not against paying; I would like to understand the rationale behind setting the prices as such, especially knowing that ISO is network of national standard institutes (i.e. funded by governments). And I also doubt that these prices would generate enough income to fund an organization like that, so there must be another reason.

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  • How to create a temporary staging server on my home machine [closed]

    - by Homunculus Reticulli
    Possible Duplicate: What things required to host a website at home I want to create a temporary staging server which can be accessed (i.e. via browser) by other people that I want to show the website to (a business partner who is half way accross the world). IIRC, my ISP issues dynamic addresses so I may need to register with a (DNS server?) - not sure about this. Although I'm a software developer, I don't know much about the hardware side of things - and would appreciate help in getting me setup so I can show a website to a business partner. Here are the relevant details: Web server: Apache 2.2 OS: Ubuntu 10.0.4 LTS modem/router: ZyXel P-600

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  • Getting wireless to work on Ubuntu 11.10 (on a mac machine)

    - by yayu
    I have a 2008 white 13.3 inch macbook that now solely runs ubuntu. However, I cannot get wifi or cable to work on it. Regarding the cable, it atleast tries to connect but eventually disconnects from the wired network. Here is the output for lspci (pastebin) I tried installing b43-fwcutter and firmware-b43 but get errors. (I loaded them from a thumb drive and tried sudo dpkg -i). I cannot understand these instructions from the documentation, as I cannot locate the pool directory. b43-fwcutter is located on the Ubuntu install media under ../pool/main/b/b43-fwcutter/ and patch is located under ../pool/main/p/patch/ or both in the official repositories online. Note: In some versions (10.04 and 11.04 at least) there is not a /pool/main/p/patch/ If this file is missing then you don't need it. In this case you only need to install /pool/main/b/b43-fwcutter by following the instructions below.

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  • Programming language for simple program?

    - by jamherst
    I am wondering about which programming languages people see fit to create a program idea that I had. I am looking to create a fairly simple program whose main functions are adding to, managing, and searching through a database of people, all through a polished GUI. It will be for use in the business world, so I think Windows would be the priority, but Mac and Linux support wouldn't be bad. Also, eventually I would like to add the ability for an instance of one program on a computer to interact with other instances on the same network, mainly through the sharing of a database. Most of my experience is in Java, but I don't particularly like the appearance of Java GUIs, so I'm looking for an alternative. I noticed that a lot of people have suggested C++ or C# in similar posts, so what are some of the advantages/disadvantages of one or both if that is your suggestion. Thanks for any help in advance.

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  • Installing multiple ubuntu partitions on same machine without corrupting GRUB

    - by LGB
    I had only ubuntu installed on my pc, but I felt like adding another ubuntu (same version) partition so I could have one just for work/study and another one just for personal generic use. I installed it and it worked out okay, but I found I needed more space on the new created Ubuntu partition, so I booted up from the Live CD, and used GParted to move/shrink/grow the partitions as the Ubuntu's tutorials suggested it was pretty straightforward. But in doing all this I messed up with Grub, so when I start my system it shows: error: unknow filesystem grub rescue What would be the easiest way to recover it so I could have both partitions working? Btw, it wouldn't be a problem for me to lose the partitions if it's the shortest/easiest way. Thanks in advance.

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  • Menu to let me choose OS to run in a dual boot machine

    - by user1145905
    I recently re-imaged my Dell PC to dual-install Windows 7 and Ubuntu 12.04.1 LTS. The dual-boot was a success, since I was able to start whichever OS I wanted. Now, I installed some software (the OpenJDK package) on the Ubuntu side of the PC. Upon restarting Ubuntu, I unfortunately lost the ability to choose the OS that I wanted to run (i.e., Ubuntu). Ordinarily, I'd expect to: 1. Hit the power button 2. A menu (Grub?) shows up listing all OSs installed in the PC (namely, Win7 and Ubuntu) 3. Choose which OS I want and hit enter. bingo. The problem is that I don't see that menu (step 2 above). Instead, windows automatically starts, even when I hit F12 to see the boot options, none of which I understand. Your help would be great! Thanks! - Kiptoo

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  • How can I access user files on a disk moved from a Windows 7 machine to an XP machine?

    - by Fantius
    I moved the hard drive from one machine (Win 7) to another (XP) and now certain folders tell me "Access denied". I am logged in as an administrator. I had a different account on the other machine. Neither account authenticated to anything besides the local machine. The old machine is apparently dead, so I can't do anything in there like change permissions, etc. How can I access these files? Edit: After changing the ownerships of all the files and folders on the drive, I am getting a different error. And it is troubling me deeply. "xxx refers to a location that is unavailable. It could be on a hard drive on this computer, or on a network. Check to make sure that the disk is properly inserted, or that you are connected to the Internet or your network, and then try again. If it still cannot be located, the information might have been moved to a different location." No change after rebooting. Any ideas? Surely the files are still there, right?

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  • How quickly does a language get outdated?

    - by Dummy Derp
    I started learning Java recently. I started learning it using books that I picked up from the library, some that I bought, and here and there from Java documentation. The book that I use for Java was published in the year 2011. In 2012, Java8 will be released followed by Java9 in the year 2013. The questions are: How do I keep myself updated about developments in Java without having to buy a tome for Java8 and/or Java9 Is a book published in 2008 an outdated book for studying JSP and Servelets? I'm talking about Head First Servlets and JSP

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  • The (non) Importance of Language

    - by Eric A. Stephens
    Working with a variety of clients on EA initiatives one begins to realize that not everyone is a fan of EA. Specifically, they are not a fan of the "a-word". Some organizations have abused this term with creating and assigning the title to just about anyone who demonstrates above average prowess with a particular technology. Other organizations will assign the title to those managers left with no staff after a reorg. Some companies, unfortunately, have simply had a bad go of it with regard to EA...or any "A" for that matter. What we call "EA" is almost irrelevant. But what is not negotiable for those to succeed in business is to manage change. That is what EA is all about. I recall sitting in Zachman training led by himself. He posits the only organizations that don't need EA (or whatever you want to call it) are those that are not changing. My experience suggests those orgs that aren't changing aren't growing. And if you aren't growing, you're dying. Any EA program will not succeed unless there is a desire to change. No desire to change suggests the EA/Advisor/Change Agent should just walk the other way.

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  • Learning the nuances of a language (C++)

    - by prelic
    So I'm a recent college graduate, and I really enjoy working in C++; I worked with it a lot in school, and would like to pursue a career writing in C or C++. The problem I'm having is that I'm trying to learn the nuances of C++. I'm not talking about the basics, or even advanced concepts like templates, namespaces, etc...I'm talking about the real nitty-gritty stuff like undefined behavior and stuff like that. When I'm interviewing, and they put a bizarre piece of C++ code in front of me, and ask me what the output will be, I want to be able to nail those questions. Obviously experience is a great way to learn, but when I write code for practice, I [obviously] know what it does. Reading open-source projects have been good practice, but I find that there tends to be an enormous learning curve just understanding the organization of the code (because the projects tend to be large). So basically what I'm asking is, what should I do now? Any tips are greatly appreciated!

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  • Creating an Interface To a Language's Standard Library?

    - by Nathan Arthur
    In the process of learning test-driven development, I've been introduced to dependency injection and the use of interfaces, and have started using these concepts in my own PHP code in order to make it more testable. There have been times when I've needed to test code that was doing things like calling the PHP time() function. In order to make these tests predictable, it seemed logical to create an interface to the standard PHP functions I use so that I can mock them out in my tests. Is this good software design? What are the pros and cons of doing this? I've found myself groaning at how quickly my PHP interface can stick its fingers into everything I do. Is there a better way to make code that relies on PHP-accessed state and functions more testable?

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  • Best/ most efficient way to learn a programming language as a beginner [closed]

    - by dizzytri99er
    I am a student and have obtained a one year placement at a business that develops an e-commerce system using C#, HTML, WPF, javascript, ASP and more. Although I do have a little bit of knowledge, I find myself being assigned a lot of tasks that are beyond me and even when I ask for help, the response I get is often cryptic to me. I stare at as much code as possible to just try and "throw myself into it" but I often just get lost in the code I like to consider myself a fast learner and I am damn determined to be a good programmer. I would just like to ask if there are some tips for me to catch up as quick as possible? I don't want to be a nuisance and sit here and ask for help 24/7. I just want to crack on!

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  • How to access Virtual machine using powershell script

    - by Sheetal
    I want to access the virtual machine using powershell script. For that I used below script, Enter-PSSession -computername sheetal-VDD -credential compose04.com\abc.xyz1 where, sheetal-VDD is hostname of virtual machine compose04.com is the domain name of virtual machine and abc.xyz1 is the username of virtual machine After entering above command , it asks for password. When the password is entered I get below error, Enter-PSSession : Connecting to remote server failed with the following error message : WinRM cannot process the reques t. The following error occured while using Kerberos authentication: There are currently no logon servers available to s ervice the logon request. Possible causes are: -The user name or password specified are invalid. -Kerberos is used when no authentication method and no user name are specified. -Kerberos accepts domain user names, but not local user names. -The Service Principal Name (SPN) for the remote computer name and port does not exist. -The client and remote computers are in different domains and there is no trust between the two domains. After checking for the above issues, try the following: -Check the Event Viewer for events related to authentication. -Change the authentication method; add the destination computer to the WinRM TrustedHosts configuration setting or us e HTTPS transport. Note that computers in the TrustedHosts list might not be authenticated. -For more information about WinRM configuration, run the following command: winrm help config. For more information, see the about_Remote_Troubleshooting Help topic. At line:1 char:16 + Enter-PSSession <<<< -computername sheetal-VDD -credential compose04.com\Sheetal.Varpe + CategoryInfo : InvalidArgument: (sheetal-VDD:String) [Enter-PSSession], PSRemotingTransportException + FullyQualifiedErrorId : CreateRemoteRunspaceFailed Can someone help me out in this?

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  • How can i compare Audio, what programming language should i use

    - by Pimmetje
    I have 2 audio files that are from almost the same source. But at some points there shifted a bit. Also the codecs does not match. I would like to make a program that takes a sample 2 - 4 seconds. And looks for it in the other file. (Most of the time it's not shifted more than 30 seconds). Than take the time and store it, Go ahead for a few seconds take a sample and find it again. This way i want to create a file where i can see on what points the file is shifted. For people who are more interested in what i want. I have a audio/video file speech and subtitles. But i have same speech from different sources with differs a bit in time. And i like to make a program that can correct the subtitle time for me. Enough about the problem I looked on the Internet for ways to compare audio files. Based on what i read comparing 2 audio files isn't that easy as i had hoped. Some talk about algorithms http://www.perlmonks.org/?node_id=169641 Some audio-library's portaudio.com aubio.org sourceforge.net/projects/ccaudio/ ambiera.com/irrklang/ The biggest problem i have is that i can't find something i can generate from the audio that i can use to compare with. I hope someone here can point me in the right direction.

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  • A tale of UAC on a Windows 7 Development Machine

    - by TATWORTH
    This week I faced an interesting problem on a Windows 7 Development PC. I have run MakeLog (http://commondata.codeplex.com/releases/view/13206) sucessfully on my PC but my colleague could not run it sucessfully. Both of us are local administrators, so what I could do on my PC, he should have been able to do. The cure was to turn UAC completely off and re-boot. Once re-booted, the installation ran without incident. While I would never suggest turning off UAC normally, on development PCs, it is a liability as it stops many normal operations and occasionaly without giving a prompt.

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  • Linux multimedia dream machine, cool!

    <b>Handle With Linux:</b> "This is the Dreambox, a Linux powered price winning digital television receiver. While it may not look like much at first, wait till you hear what special features it supports (some unofficially) ."

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  • Efficient algorithm for Virtual Machine(VM) Consolidation in Cloud

    - by devansh dalal
    PROBLEM: We have N physical machines(PMs) each with ram Ri, cpu Ci and a set of currently scheduled VMs each with ram requirement ri and ci respectively Moving(Migrating) any VM from one PM to other has a cost associated which depends on its ram ri. A PM with no VMs is shut down to save power. Our target is to minimize the weighted sum of (N,migration cost) by migrating some VMs i.e. minimize the number of working PMs as well as not to degrade the service level due to excessive migrations. My Approach: Brute Force approach is choosing the minimum loaded PM and try to fit its VMs to other PMs by First Fit Decreasing algorithm or we can select the victim PMs and target PMs based on their loading level and shut down victims if possible by moving their VMs to targets. I tried this Greedy approach on the Data of Baadal(IIT-D cloud) but It isn't giving promising results. I have also tried to study the Ant colony optimization for dynamic VM consolidating but was unable to understand very much. I used the links. http://dumas.ccsd.cnrs.fr/docs/00/72/52/15/PDF/Esnault.pdf http://hal.archives-ouvertes.fr/docs/00/72/38/56/PDF/RR-8032.pdf Would anyone please clarify the solution or suggest any new approach/resources for better performance. I am basically searching for the algorithms not the physical optimizations and I also know that many commercial organizations have provided these solution but I just wanted to know more the underlying algorithms. Thanks in advance.

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