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  • rubygem "Argument list too long"

    - by mehmermaid
    My problem is that during or after running a process which uses Ruby intensively, when I use any gem command including gem --version or gem install rake, it hangs for just over a minute and then gives me this error: $ gem list /Users/username/.rvm/bin/gem: line 5: /Users/username/.rvm/bin/gem: Argument list too long /Users/username/.rvm/bin/gem: line 5: /Users/username/.rvm/bin/gem: Unknown error: 0 file at : line 5: /Users/username/.rvm/bin/gem #!/usr/bin/env bash if [[ -s "/Users/username/.rvm/environments/ruby-1.8.7-p334" ]] ; then source "/Users/username/.rvm/environments/ruby-1.8.7-p334" exec gem "$@" # this is line 5 else echo "ERROR: Missing RVM environment file: '/Users/username/.rvm/environments/ruby- 1.8.7-p334'" >&2 exit 1 fi The only way that I have found to get this working again is to restart my computer, which is obviously undesirable. I am using OSX 10.6.5 I have spent quite a while trying to find anyone else who has had this problem, and been unsuccessful. Do you have any idea why this might be happening?

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  • LockWorkStation - Compilation error - identifier not found

    - by Microkernel
    Hi All, I am writing an application in which I got to lock the computer screen (OS is Windows). My Application is in C++. For this purpose I used the LockWorkStation() API defined on msdn, http://msdn.microsoft.com/en-us/library/aa376875%28VS.85%29.aspx I have included windows.h as told but still I am getting compilation error: .\source.cpp(5) : error C3861: 'LockWorkStation': identifier not found here is a sample code thats giving error. #include <Windows.h> int main() { LockWorkStation(); return 0; } Please tell me what I am missing here :( I am using MS-Visual studio 2005. Regards.

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  • What is your longest-held programming assumption that turned out to be incorrect?

    - by Demi
    I am doing some research into common errors and poor assumptions made by junior (and perhaps senior) software engineers. What was your longest-held poor assumption that was eventually corrected? For example: I at one point failed to understand that the size of an integer was not a standard (depends on the language and target). A bit embarrassing to state, but there it is. Be frank: what hard-held belief did you have, and roughly how long did you maintain the assumption? It can be about an algorithm, a language, a programming concept, testing, anything under the computer science domain.

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  • Access Database connect C# local director

    - by Bomboe Cristian
    I want my connection to the database to be available all the time, so if i move the folder with the project, to an other computer, the connection to be made automaticaly. So, how can i change this connection: this.oleDbConnection1.ConnectionString = "Provider=Microsoft.Jet.OLEDB.4.0;Data Source=\"C:\\Documents and Settings\\Cristi\\Do" + "cuments\\Visual Studio 2008\\Projects\\WindowsApplication3\\bd1.mdb\""; ??? It should read the project directory or something. I don't know. Any ideas? Thank You!

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  • Play sound in mobile browser?

    - by John
    I want to make myself a web based stop watch for training that I can use on my Blackberry mobile browser. The stopwatch should count 3 minutes, then ring a bell, wait 1 minute, then ring another bell and then repeat. My problem is I can't seem to get sound to work on my blackberry browser. I tried using <embed src="bell.wav"> which works fine in the browser of a normal computer, but it doesn't make a sound on my blackberry. Should I build this stopwatch with Javascript and HTML or should I build it with flash?

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  • Recover backup copy of a ubuntu linux installation on a usb stick using dd

    - by Werner
    Hi, I installed Ubuntu 10.04 on a usb stick in persistent install mode. So I could boot the laptop or my desktop computer with the stick, at boot time. Once I needed the 8GB stick for another purposes so I thought about coyping it to my desktop doing from mac os x: dd if=/dev/disks3s of=/Users/jack/Desktop/usb_copy Now I am trying to do the opposite, after having used the stick, which was formatted to NTFS, just doing dd if=/Users/jack/Desktop/usb_copy of=/dev/disks3s but although I can see that almost of the files are there, I can not boot again. IT is also strange the the file permissions are kind of strange, something like _user What can I do ? Thanks

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  • Programming Environment that runs directly on the iPhone or iPad?

    - by lexu
    Is there a development environment that runs directly on an the iPhone OS? I will be without access to a computer/internet for some time, but will have the use of an iPad (WiFi, jailbroken). Do you know of any way to dabble with programming directly on the device. Since apple is commit to not let it happen, I assume I will have to find such an environment on cydia (or a 'similar' site). I don't seem to be able to find the correct google incantations (search terms) to locate such a package.

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  • What are the things I use every day programmed with?

    - by sub
    It isn't so interesting to find out what this text editor here or that IRC client there was programmed with, also it isn't really hard and neither are there really suprising things to come out. Wow so it was programmed in Python, I didn't expect that. What I'm asking is: What are the things that we daily see, use or generally need programmed with? To name a few (really only a few of those out there): My alarm clock It has many features so it would probably be hard programming it with assembler or whatever, so did they probably use a programming language? If yes, which? My electrical tooth brush The (stupid) board computer of my car. (6 years old, has few features but a red LED display showing me how cold/warm it is outside and how much gas I'm using up per hour at the moment) Those (old) plastic mini-mini computers with the LCD(?) displays that only had one game available on them: PacMan, tetris or so. I'm not directly thinking of this but it may be similar: Other, probably more interesting, things I didn't mention

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  • XSS to change ASP.NET session state

    - by Juri Bogdanov
    Hello! I am developing the application that stores current user and user's role to session state (System.Web.SessionState.HttpSessionState Page.Session). if (Session["username"] == null) Session.Add("username", User.Identity.Name); if (Session["isAdministrator"] == null) Session.Add("isAdministrator", User.IsInRole(domain + "\\Domain Admins")); After I check these session states in code behind for granting permissions to some excecution: if ((bool)Session["isAdministrator"] || computer.Administrators.Contains(Session["username"].ToString())) My question is next: how safe that mechanism is? Is it possible to change the session states using some JavaScript for example or some how else? Thanks :)

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  • What Level of Education Is Most Useful?

    - by Steve Rowe
    If you were going to hire a programmer to work for/with you, what level of CS education would you prefer them to have and why? This assumes all other things are equal which, of course, they never are in real life. Self taught? Bachelor's? Masters? PHD? The important part of the answer is why, not the level. I'm looking for how important people think a Computer Science education really is and if one can go too far. A little clarification: To make things a little more even, assume you're hiring them without a lot of work experience. Obviously having a higher education is of less value the farther you are from graduation.

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  • xcode - ipad app. UIWebView Remember login info

    - by Aakburns
    I'm working on an application to run base camps website only. I need it to work when you login and press "Remember me on this computer" I'm not sure how to set it up to actually remember your login and keep you logged in when you come back to the app. Is there a way to 'save' the state of the application when you quite it and come back to what you were doing? Here is an image of the login form on the website used in the application. http://arikburns.com/forums/fn/IMG_0005.PNG Thanks.

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  • firefox displaying .swf with wrong dimensions

    - by John Leonard
    I can't figure this one out. I have a flex app with fixed dimensions (950 x 700). I'm compiling the swf and using the default wrapper that flex generates. in some instances of Firefox, the dimensions are wrong. On top of that, with different domains, I get the .swf rendered with different dimensions (both wrong). Firefox 3.6.3 on one computer works fine. On another, the dimensions are off. Swf example and if you don't see a clipped swf...here are the screenshots. Rendered incorrectly on one domain And rendered in another domain with different bad dimensions. I'm at a total loss. When I embed the .swf with swfobject, I get the same issue. In the example you see, there's nothing in the app except for a single label centered on the stage.

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  • Trying to execute netdom.exe from a ruby script or IRB does nothing

    - by Joraff
    I'm trying to write a script that will rename a computer and join it to a domain, and was planning to call on netdom.exe to do the dirty work. However, trying to run this utility in the script (same results in irb) does absolutely nothing. No output, no execution. I tried with backticks and with the system() method. System() returns false for everything but system("netdom") (which returns true). Backticks never return anything but an empty string. I have verified that netdom runs and works in the environment the script will be running in, and I'm calling other command-line utilities earlier in the script that work (w32tm, getmac, ping). Here's the exact line that gets executed: `netdom renamecomputer %COMPUTERNAME% /NewName:#{newname} /force` FYI, This is windows 7 x64

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  • Howto troubleshoot vb6 dll 800a01ad error in c# application

    - by phq
    I have a dll that I created from a VB6 project that I am now using in a c# project. This has worked before but now when I try to return to the c# project to fix a bug, the program get a COMException stating roughly translated: Could not create an instance of COM-component with CLSID {085E3494-9F78-47D5-B0E6-FA460FD3CBED} from IClassFactory because of the following error: 800a01ad. So I try to create a new empty c# project with only one line in the main function: OurNamespace.OurClass foo = new OurNamespace.OurClass(); Which fails with the same error. I have registered the dll but that did not change the outcome of the problem. The problem only occurs on the machine I am currently at, still I'm interested to understand the problem so that I know how to fix it if it occurs on a customers computer.

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  • Difference between 'scope' and 'namespace'?

    - by katriel
    What is the difference, in general, between the concepts of namespaces and scope? To my understanding, both describe the parts of a program in which a variable/object/method/function will be accessible. I understand that 'scope' tends to be a property of the variable (e.g., "This variable has global scope"), while a 'namespace' is a property of the program (e.g., "A Python function creates a local namespace"). Are there other differences? Global scope vs global namespace addresses a slightly narrower question: global namespaces in C++. http://www.alan-g.me.uk/tutor/tutname.htm states, There are a few very subtle differences between the terms but only a Computer Scientist pedant would argue with you, and for our purposes namespace and scope are identical. What are those subtle differences? Under what circumstances or with which kinds of languages do people use each concept?

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  • Commenting practices?

    - by Tarmon
    Hey Everyone, As a student in computer engineering I have been pressured to type up very detailed comments for everything I do. I can see this being very useful for group projects or in the work place but when you work on your own projects do you spend as much time commenting? As a personal project I am working on grows more and more complicated I sometimes feel as though I should be commenting more but I also feel as though it's a waste of time since I will probably be the only one working on it. Is it worth the time and cluttered code? Thoughts?

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  • Verify windows log-in via smart card

    - by Ronen Rabinovitz
    Hi I need to verify in my WPF application if the user log in to his computer via password or via smart-card. Both login options are available in my company clients but my application need to open only in the smart-card login. All the clients are windows 7 OS. I look at some sites: http://technet.microsoft.com/en-us/library/ff404285(v=ws.10).aspx http://www.codeproject.com/Articles/240655/Using-a-Smart-Card-Certificate-with-NET-Security-i and I'm thinking I need to get the enhanced key usage (EKU) attribute field. If the EKU is empty = then the user was loged via password and not via smartcard. I only need this simple check, I do not care for creating/validations on certificates atc.

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  • best analogy to explain free software floss to non geeks

    - by opensas
    How do you explain free libre open source software to a computer illiterate guy? Two well known analogies I've often heard are: free software as a meal recipe, a set of instructions for you to inspect, learn, put into practice, and improve... versus a canned meal that you can only swallow without even knowing what you're eating... and the other is comparing privative software to a car that you aren't allowed to open it's trunk to see inside in case anything goes wrong... I'd like to know what other analogies you know that might help us explain free software to non geeks saludos sas

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  • Working with images in WCF

    - by hgulyan
    Hi, I have a desktop application that needs to upload/download images to/from service computer over TCP Protocol. At first, I stored images in file system, but I need to in MS SQL DB to compare which solution is better. Number of images is over half a million. I don't know yet will there be any limitation on size of a photo. If you have done smth like that, please, write what your opinion upon this question. Which one is faster, more safe? Which of them works better with this number of photos? If I'll store on DB, do I need to store images apart from all other tables which I use for my application and which type works better - image or varbinary on DB?..and so on. Thank you.

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  • iPhone/Android: How to Send Keystrokes To Laptop Over Wifi?

    - by Cirrostratus
    How can I best implement a system for send keystrokes/commands via an iPhone and/or Droid to a desktop or laptop computer via WiFi or bluetooth? There are apps for VLC, Keynote and other applications that do this, so I know it's possible but don't know what technology base to use. The implementation is probably different on Windows and OS X, but if they could be similar that'd be a big win. If VNC-type technology is used, that'd be fine but I only need to send key commands and mouse clicks—I don't need to be able to navigate the screen space.

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  • Update count every second causing massive memory problems

    - by Josh
    Just on my local machine, trying the run the following script causes my computer to crash... What am I doing wrong? (function($) { var count = '6824756980'; while (count > 0) { setInterval(function() { $('#showcount').html(Math.floor(count-1)); count--; }, 1000 ); } })(jQuery); All I need to do is subtract one from the var "count" and update/display it's value every second.

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  • PHP/Apache: Permission settings for uploaded JPEG image files not correct.

    - by Mike
    I just setup a LAMP development server and am still trouble-shooting some things. The server is installed on one computer and I use a Windows laptop to write my code and test the site via the web browser. My file uploading script works in that JPEG image files are successfully uploaded to the server, but when I try to view the images in the web browser, permission is denied. I check the permissions on the file via the server and they are 600. I can fix the issue by chmod 777 theimage.jpg, but this doesn't seem like a good solution at all. Does the solution have something to do with Apache configuration? Or is there something else I should be doing. Thank-you, Mike

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  • SoundPlayer causing Memory Leaks?

    - by Nick Udell
    I'm writing a basic writing app in C# and I wanted to have the program make typewriter sounds as you typed. I've hooked the KeyPress event on my RichTextBox to a function that uses a SoundPlayer to play a short wav file every time a key is pressed, however I've noticed after a while my computer slows to a crawl and checking my processes, audiodlg.exe was using 5 GIGABYTES of RAM. The code I'm using is as follows: I initialise the SoundPlayer as a global variable on program start with SoundPlayer sp = new SoundPlayer("typewriter.wav") Then on the KeyPress event I simply call sp.Play(); Does anybody know what's causing the heavy memory usage? The file is less than a second long, so it shouldn't be clogging the thing up too much.

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  • innovation for technical high school

    - by gnuze
    I work in a high school in Italy. Our goal is forming computer programmers in 5 years. Nowaday, we teach vb.net on Win ( desktop applications using ADO on Access ), C on linux ( process, threads ) , C++ on Linux ( sockets TCP/UDP with UML ), and a bit of ASP.net, flash programming, PHP, Joomla and PIC Microcontrollers. We are looking for something innovative to add in our programs of study, but every teacher have a different point of view: we are debating about python, C#, Arduino, Silverlight and smartphones programming. Any suggestions? Tx in advance.

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  • unable to get into windows 7 or ubuntu after system file back on a dual boot system

    - by John Jiang
    I installed ubuntu on my dell xps 9000 which originally has a window 7 installed. So after I did system file back up as told by windows 7 and restarted my computer, I received the following message right after restarting in the black screen: roughly like this: ubuntu grub error, " " symbol cannot be found. I was wondering how I can get access into windows 7 and uninstall ubuntu all together. I actually had the same booting problem after system backup before and the solution was to install two extra ubuntus but I'd prefer not to do that. I'd highly appreciate any help!

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