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• Pre-populating Radio Buttons with Java

  - by Gary Deuces Rozanski

  Is it possible to pre-populate a radio button, using jsp, depending on the value in the database? If so, how? I have done research here at StackOverflow & Google but with no real solution. p.s. I hope somebody can help me out with a question. As you will see from previous questions, I am not a developer, but get loaded with questions being the most technical on my team. oh the joy. Any help will be appreciated & I apologize in advance if my question is dumb.

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• estimating size of reply HTTP headers

  - by Guanidene

  I am trying to download a file via a basic socket connection, using a HTTP GET request. So, I have to specify how many bytes of data coming in I have to read from the socket. However, I am having trouble deciding the amount of data (say, in bytes) the server would reply back with. I know that there is a "Content-Length" field in the reply sent by server, but that gives me the size of the actual data (without the http headers). Is there a way to get the exact size of HTTP headers sent by the server or an estimation is required? (I am doing this for downloading on a mobile network, where every bit of data matters in terms of time and money, so I don't wish to make an unnecessary larger estimate of the header size.)

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• Comunication from Server to Client + Client LAN

  - by Filipe YaBa Polido

  I'm having some trouble with some network setup. I've tried OpenVPN, SocialVPN, Hamachi, still it is not working. This is my setup: Server A: NIC 1 with internet public address, NIC 2 to LAN Client B PC: NIC 1 (192.168.10.2) connects to router 192.168.10.1 Client B Device: 192.168.10.3 (Configured via software, can't do much here) Problem: Server A must connect to cliente device B. (I can install software needed at Client B PC). However... I can't change the router to some model with VPN like Draytek or Cisco :( OpenVPN fails at bridging, PC B can ping Server A, but Server A can't ping Device B, only PC B. What else can I do?!?!?

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• Getting column index out of range, 0 < 1

  - by Natraj

  I am using OpenJPA 2.2.0 and when I am executing a select statement I am getting "Column index out of range, 0 < 1" error. EntityManager entityMgrObj = emf.getEntityManager(); entityMgrObj.clear(); Query query = entityMgrObj.createNativeQuery("select * from company_user where user_id = 1001); List<CompanyUserDO> companyUserDOObj = null; try { companyUserDOObj = query.getResultList(); } catch (Exception e) { System.out.println(e.getMessage()); } When the query.getResultList() executes I get "Column index out of range, 0 < 1" error. Can somebody let me know what is wrong in the above code?

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• WPF integrate Windows live authentication for Microsoft health vault

  - by AnD

  Hi all, I'm just wondering if there's any way for WPF application integrated with windows live ID? and it's actually for windows health vault [www.healthvault.com] so health vault is using windows live id or open id to login into their system. and what i gonna do is, creating wpf application (instead of web application) for health vault, so all of the login form username pass and everything is handled inside the wpf application without showing/using any internet browser. so since this's quite new for me, i hope if there's somebody ever did this before especially for health vault system that run on standalone wpf app. alright, so that's it, thank you in advance!

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• Displaying and capturing c# exceptions

  - by Frank Meulenaar

  I have a c# program which throws a NullReferenceException(). When I start this on my Vista machine, it gives the familiar screen "Foo has stopped working". I can easily click on 'details' to see what went wrong. On one XP machine there's no warning at all: the program just quits, and on another XP I get the "Foo has encountered a problem..." message. Is there a way I can change this (XP's) setting? Furthermore, I would like to have this error message written to a log file, so I can see what went wrong if somebody else uses my program. Is there a way I can send the uncaught exceptions to a file?

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• How to protect HtmlHelper code in MVC controls

  - by Oats

  I am writing a custom mvc control (commercial), and all of the control's code lives in the custom htmlhelper code that i will have to distribute to the user. I am ok with this for my commercial license sale, but for evaluating the controls, if i give out the htmlhelper code locally for my potential customers to evaluate, the user can simply "get" all the code and hence he may never buy it since he's got teh control code. How do i protect my htmlhelper code while somebody is evaluation my cusotm mvc controls? Is this a general problem or (I wish) i am missing something here? Thanks.

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• No Cookies at second Webrequest

  - by Collin Peters

  Hello, I write a little Tool in C# with Visual Studio 2008. My Problem: I login to a website by HTTP-webrequest, I get an authentification cookie, thats all ok. Than I make a new HTTP-webrequest and add the cookies from the first request to call the next page where i can see my personal data. I see that the cookies will associated with the second request if I debug it but if I check the network traffic I see that are no Cookies transmitted at the second request. I tried many possibilities to see why i dont work but i found nothing. Does somebody have the same problem or know a solution? (Sorry for bad english)

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• Program occasionally stuck when writing to ldap

  - by djerry

  hey guys, I have 2 databases for my program : mysql and ldap. All transactions happen to mysql, but i need ldap to connect to ip-phones. There's an option to synchronise the ldap database. So when the ldap is brand new, and mysql contains like 200+ records, it may want to update. But when inserting all those entries, it "freezes". It never happens at the same record, it's very random. Sometimes after 70 records, sometimes at 200 the program quits inserting, and gets stuck. This is very annoying. My best guess is that ldap can't handle that much inserts in a short time. Code isn't the problem, as it is a random problem. Does this seem familiar to somebody or is it just me? Thanks in advance.

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• Why would ftp_connect() return false on production server if it works elsewhere for connecting to th

  - by letseatfood

  I have a script that uses ftp_connect() among other FTP PHP functions for uploading a file. ftp_connect() works when executed on my local development server for connecting to a remote FTP server. The same script, when executed on the remote server does not work for connecting to the exact same FTP server. Could somebody please point me in the right direction? Thanks! Here is the code: error_reporting(E_ERROR | E_WARNING | E_PARSE); $server = 'ftp.someserver.com'; $ftpConn = ftp_connect($server); if(!$ftpConn) echo 'failed'; else echo 'success'; No errors are reported.

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• How to specify an SSH key for Hudson with git plugin?

  - by jlpp

  I've got Hudson (continuous integration system) with the git plugin running on a Tomcat Windows Service. msysgit is installed and the msysgit bin dir is in the path. PuTTY/Pageant/plink are installed and msysgit is configured to use them. The trouble I'm running in to, I think, is that the user who owns the Tomcat/Hudson service (Local System) has no SSH key set up to be able to clone the git repository. When the git Hudson plugin tries to clone it gives the error: $ git clone -o origin git@hostname:project.git "e:\HUDSON_HOME\jobs\Project Trunk\workspace" ERROR: Error cloning remote repo 'origin' : Could not clone git@hostname:project.git ERROR: Cause: Error performing git clone -o origin git@hostname:project.git e:\HUDSON_HOME\jobs\Project Trunk\workspace Trying next repository ERROR: Could not clone from a repository FATAL: Could not clone hudson.plugins.git.GitException: Could not clone My question is, how can I set things up so that the git plugin/msysgit know to use a particular SSH private key when trying to clone? I don't think Pageant will work because the Tomcat service is running as the "Local System" user, but I may be wrong.

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• /proc/pid/environ missing variables

  - by Josh Arenberg

  google is giving no love on this one today, so I turn to the experts... I'm currently hacking together a script that relies on the /proc/pid/environ feature in Linux (RHEL 4) to check for a particular environment variable. Trouble is, it seems certain environment variables aren't showing up in there for some reason. Example: create some test vars: $ export T_1=testval TEST_1=testval T=testval TESTING_LONGEST=testval open a subshell: $bash $ cat /proc/self/environ|tr "\0" "\n"|grep testval TESTVARIABLE_LONGEST=testval T=testval hmm... where did T_1 and TEST_1 go?? what rules govern this strange universe? Thanks in advance, Josh

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• c++ macros question

  - by rabidmachine9

  can somebody explain the following code please? #if 1 // loop type #define FOR_IS_FASTER 1 #define WHILE_IS_FASTER 0 // indexing type #define PREINCREMENT_IS_FASTER 1 #define POSTINCREMENT_IS_FASTER 0 #else // loop type #define FOR_IS_FASTER 1 #define WHILE_IS_FASTER 0 // indexing type #define PREINCREMENT_IS_FASTER 0 #define POSTINCREMENT_IS_FASTER 1 #endif #if PREINCREMENT_IS_FASTER #define ZXP(z) (*++(z)) #define ZX(z) (*(z)) #define PZ(z) (++(z)) #define ZP(z) (z) #define ZOFF (1) #elif POSTINCREMENT_IS_FASTER #define ZXP(z) (*(z)++) #define ZX(z) (*(z)) #define PZ(z) (z) #define ZP(z) ((z)++) #define ZOFF (0) #endif I can understand what the functions are doing but for example how does the pre-processor choose which ZXP will be execute if we call it later? What the 1 and 0 stand for? thanks in advance

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• Why it's not possible to compile on a different OS than end-user OS [closed]

  - by sameold

  I was trying to compile a php extension on Windows and ran into some trouble. I then thought it was possible to do the compilation for Windows on Linux, but turned out that wasn't possible. Can someone explain to me why compiling has to be done on the same OS? I'm trying to understand this topic, specifically because if I want to distribute something, does that mean I have to compile it on all these OSs (Windows 7, Windows Vista, Windows XP, Linux, Mac, etc. etc. etc.) So what makes it not possible to compile for one OS on another? Is it the kernel or what?

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• Fatsest way to edit alpha of CGImage (or UIImage) with touch and then display?

  - by Pankaj

  I have two image views, one on top of the another, with two different images. As the user touches the image and moves his/her finger, the top image should become transparent along the touch points with a fixed radius. (Like the PhotoChop app). Currently I am doing it this way... For each touch. Get a copy of the image buffer from CGImage of the top image. Edit the alpha channel of the buffer to create a transparent circle centered at the touch point. Create new CGImage from the buffer. Create UIImage from the CGImage and use the new UIImage as the top image view's image. This works but as you can see too many copy, creates are involved and it is slow. Can somebody please suggest me a faster way of doing the same thing?

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• something like persistent X forwarding?

  - by Arthur Ulfeldt

  I'm having trouble with the title on this one, please edit. When users connect to a VM with VNC/NX/RDP/other-tla they get a persistent desktop in a window . When they connect using ssh -X forwarding they get a local window managed by the local windo-manager that is not persistent. 1: is there a way to run a program on the VM and have it managed locally AND have it persistent? 2: can the client be on windows or OS-X? ps: in this case the vm's are running Ubuntu

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• Ubuntu 11.04: No Audio Output

  - by Jason George

  I installed a fresh copy of Ubuntu 11.04 earlier this week and I'm having trouble getting my audio online. It was working fine in 10.04 and all the resources I can find on troubleshooting seem to be fairly dated so I'm not sure if they apply. CMI8788 [Oxygen HD Audio] Analog Stereo Duplex Playing a WMA file shows 0.00db output when I mouse over the sound controller in the status bar. Obviously, no output from my speakers. I tried adjusting the profile, thinking I might have the wrong one. That seems to have made things worse. Where mouse over originally said something along the lines of "Oxygen HD Audio," it now reads "Dummy Output." Selecting "Test Speakers" in sound preferences crashes the dialog. Any pointers would be great.

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• Need direction in creating a voice chat application

  - by WarDoGG

  I want to create a voice chat application as a part of a project. However, i am totally lacking direction regarding the programming language to use, the technologies involved. Can somebody please guide me as to how i should proceed ? Here are the features that i require : user to user voice chat ability to chat in conference (more than 2 users) How do i connect one user to another ? How to handle voice transmission ? How to effectively route packets in a conference ? I'm thinking the most probably langauge to develop this in would be Flash. Any suggestions are welcome.

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• scp to remote servers stalls, unable to isolate cause

  - by Rolf

  When I copy a large file (100+mb) to a remote server using scp it slows down from 2.7 mb/s to 100 kb/s and downward and then stalls. The problem is that I can't seem to isolate the problem. I've tried 2 different remote servers, using 2 local machines (1 osx, 1 windows/cygwin), using 2 different networks/isps and 2 different scp clients. All combinations give the problem except when I copy between the two remote servers (scp). Using wireshark I could not detect any traffic volume that would congest the network (although about 7 packets/sec with NBNS requests from the osx machine). What in the world could be going on? Given the combinations I've used there doesn't seem to be any overlap in the thing that could be causing the trouble.

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• dismissViewControllerAnimated completion block presenter view and modal view flow

  - by Patricia LaRue

  I did find an answer to this title and I did do a little research but I'm still not getting the flow. Here is what I want to happen: 1) click a button on the presenter view to open a modal view. 2) retrieve some value and click a button to close the modal view....sending the value to the presentor view and execute a method. I get that this works like a callback but I still can't figure out where to put the callback stuff. So, how exactly do I do this? A) In the presentViewController completion block, should I include the presenter view method to execute when modal view is completed? Or: B) In the modal view's dismissViewControllerAnimated completion block, should I include the presenter view method to execute when modal view is completed? Can somebody help me with some sample code? Or at least help me get the flow of which block to put the code in? Thank you, P

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• Windows Server 2008 r2 FTP blocking outside connections

  - by nbon

  I have a windows server 2008r2 running IIS 7.5. I am trying to setup a FTP-server in IIS but I'm running into some annoying problems. Setting up the server works fine but when I try to connect from a remote client the connection times out. I have tried to connect to the FTP-server from the localhost and it works flawlessly. I figured that it should be some trouble with the firewall so I went into firewall settings and disabled the Public Profile and my remote connections worked! In my inbound rules there are rules for FTP-connections to allow all profiles etc. I guess they are made automatically when setting up the FTP-server. Anyone got any idea how to allow remote connections without turning off the public firewall?

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• JTable - Getting a cell into Edit mode on pressing Tab

  - by Luhar

  This is possibly has a trivial solution, but I am at the end of my tether so I hope somebody can help out. I use a JTable which has a custom renderer and a custom editor for a set of columns. The renderer uses a JLabel component and the editor uses a JSpinner component. Our users want to be able to enter values in a column, and then press TAB or ENTER to move to the next editable cell in the table. If I understand correctly, this is the default behaviour for a JTable. However, this doesn't seem to work correctly for me. Until the user clicks on the cell, only the JLabel is displayed. The JSpinner (i.e. CellEditor) is only displayed when a user double clicks on the cell. So, it looks like the cell is going into "edit" mode only on MouseEvents, but not when it has focus. How do I get the cell to go into edit mode as soon as it has focus?

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• Any experience with SATA SAS Interposer Cards?

  - by korkman

  Driven by the current price difference between SATA and SAS disks on one side and the potentially bad behaviour of SATA disks in bigger storage arrays on the other side, I have found so-called SATA-to-SAS interposer cards. Advertised as "seamlessly adding SAS capabilities to existing SATA disk drives", I wonder if anyone here has had some experience with these or similar products. The major benefits I can identify are the increased cable voltage (if all drives are SAS connected), the ability to power-cycle the drive and multipath (if desired). Obviously the SATA drive will still have to be RAID edition. The question is: Do these cards indeed increase the overall reliability of a storage system, or will failing SATA disks cause trouble nevertheless? Edit: I'm not asking for hypothetical answers, only actual experience please. I'm well aware that the typical 10k SAS drive is more reliable (and better performing) than 7200 SATA drives. But how does a nearline SAS, which is phyiscally the same disk as its SATA counterpart, compare to the SATA version with interposer?

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• Question About Abstract Classes?

  - by IbrarMumtaz

  URL: Link (1) According to this wesbite .. you cannot implement Abstract classes but derive from them. This makes sense and I have read this many times. Like an interface, you cannot implement an instance of an abstract class, however you can implement methods, fields, and properties in the abstract class that can be used by the child class. But on MSDN URL: TextWriter CLass on MSDN TextWriter is an abstract class but it has two constructors defined ... and according to the MS 70-536 book, the following statement is valid: TextWriter tw = new File.CreateText("myFile.Txt") The static file class and it's CreateText method is fine by me as I have studied it on MSDN but can somebody explain this little contradiction I have found? Surely I am not the first? Why is instantaion of base abstract classes possible????

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• playing incoming video stream

  - by mawia

  Hi! all, I am writing an application which is a kinda video streamer.The client is receiving a video stream using udp socket.Now as I am receiving the stream I want to play it simultaneous.It is different from playing local video file lying in your hard disk in which case it can be as simple as running the file using system("vlc filename").But here many issues are involved like there can be delay in receiving and player will have to wait for the incoming data.I have come to know about using vlc to run a video stream.Can you please elaborate the step for playing the stream using vlc.I am implementing my application in c++. EDIT: Can somebody give me some idea regarding VLC API which can be used to stream a given video to particular destination and receive that stream at other end play it. with regards, Mawia

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