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  • R: simple and short if clauses for combind statements

    - by jorgusch
    Hello, TRUE/FALSE if clauses are easily and quickly done in R. However, if the argument gets more complex, it also gets ugly very soon. For instance: I might want to execute different operations for a row(foo) dependent on the value in one cell (foo[1]). Let the intervals be 0:39 and 40:59 and 60:100 Something like does not exit: (if foo[1] "in" 40:60){... In fact, I only see ways of at least two if clauses and two else statements and the action for the first interval somewhere at the bottom of the code. With more intervals(or any other condition) it is getting more complex. Is there a best practice (for this purpose or others) with a simple construction and nice design to read? Thanks a lot!

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  • How many databases to support eCommerce?

    - by Terry Lorber
    I have a system with two databases, one that the customer-facing website uses, the second that is used by the "backroom" order-fulfillment system. I've been asked to run queries from the website to the backroom system. I'd rather not, it seems risky to allow web-based request to run unheeded on the internal system. Additionally, this means opening up routing in the firewall to allow external connections to the internal server. What's the best practice for eCommerce? Run the entire company off of one database? Or individual databases for each system, and middleware to connect them? Sometimes it might be necessary for the web application to pull date from the internal system, but not based on an HTTP request from the internet. I'm sure the best answer is "it depends!" So, if people have a rule of thumb for when to use middleware and when not to, I'd like to here it.

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  • C++ include header conventions

    - by user231536
    Suppose I have a file X.h which defines a class X, whose methods are implemented in X.cc. The file X.h includes a file Y.h because it needs Y to define class X. In X.cc, we can refer to Y because X.h has already included Y.h. Should I still include Y.h in X.cc ? I understand that I don't need to and I can depend on header guards to prevent multiple inclusions. But on the one hand, including Y.h makes X.cc a little more independent of X.h (can't be completely independent of course). What is the accepted practice? Another example: including <iostream> in both .h and .cc files. I see some people do this and some don't.

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  • Using static strings to define input field names in JSPs - good idea or not?

    - by Derek Clarkson
    Hi all, I've just be asked to work on a large portal project and have been looking through the established code. I keep finding this in the jsps: <input class="portlet-form-button" name="<%=ModifyUserProfile.FORM_FIRST_TIME_LOGIN_SUBMIT%>" type="submit" ... The authors are using static strings defined in classes to define the names of input fields and buttons in jsp forms. I've never seen this done before and was wondering if this is common practice. I'm inclined to think not, but I'm asking because, apart from centralising names which I would have thought are not likely to change, I can't see the reason why. Any thoughts on this?

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  • Threading Problems in ActionScript 2.0?

    - by yar
    Is it possible to have concurrency problems (thread competition) in an onEnterFrame method in ActionScript 2.0? I have written this cheesy code as a guard: if (!busy) { // I suspect some threading problems: is that even possible in flash busy = true; movePanels(); busy = false; } but this is no assurance against thread competition. If so, how can I do a basic semaphore/lock? Note: I suspect threading problems in my app, but if they're impossible, I'll check my code differently.

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  • Problems connecting to MS Dynamics AX 2009 Application Object Server

    - by Sam
    I've got a funny problem connecting to an AOS server. I got a domain network containing a (VM) Server running the Application Object Server (AOS). Client computer A) can connect to the AOS without problems and work. When client computer B) tries to connect, all I get is this error message: Logon Error Connection with the Application Object Server could not be established. The event log of Client B) does not contain any messages about this. Firewalls are off on all three computers (by GP). Tcp/ip from cliebt B) to the AOS server does run fine. Both clients run the same OS (win 7 RC), sit on the same subnet, next to each other. Yesterday it all worked, today just one computer can connect. Any ideas what might cause this problem, how to resolve it, or how to debug it?

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  • Problems linking to social networks in Windows 8

    - by Andrew Cooper
    I've upgraded my laptop to Windows 8 (from Windows 7) and I'm having problems with getting information to show in the People and Messaging apps. I've linked my Facebook, Twitter and LinkedIn accounts to my Live Id, and on Windows 7 I was able to see my Friends' facebook activity in Windows Live Messenger. In the Windows 8 People app I can see all my contacts from Facebook, Twitter and LinkedIn, and I can see the on-line status of at least my Facebook contacts. I can also see the profiles details of each contact, but I don't get anything in the "What's New" view. The Messaging app is just blank. I assume I should be able to send messages to my contacts, but I can't see any way to do it. Am I missing something?

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  • Flash Player in Windows 7 X64 problems

    - by Flupkear
    I'm having a lot of problems with flash player in my win 7 X64 laptop, in YouTube the videos are completely black, you can only hear the sound and in Vimeo the videos are played well in normal size but completely black in fullscreen. Also some days ago YouTube played normal size videos but with controls not visible. I'm sure that the problem isn't the browser since this happen in Chrome, Firefox and IE 8. My laptop is a Dell XPS L501X, the flash version is 10,2,152,26 and the OS is Windows 7 Home Premium with SP1. I'll appreciate any help.

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  • Problems with mailenable when sending to yahoo mail

    - by Mee
    I'm testing sending emails from mailenable webmail. I have no problems sending mail to gmail or hotmail, both work fine, but yahoo mail sends my messages to the spam folder and shows the attachment icon for the message even though the message doesn't contain any attachments, it's just plain text. It only includes a reply to a previous message, like this: message text ----- Original Message ----- original message text I copied the message content and sent it from gmail to yahoo and the attachment icon didn't show which makes me believe it's something with mailenable. What could possibly be wrong? Also, is there a white list for yahoo mail that I can join? And also for other popular webmail? I'm going to use this on a production website (site visitors use the contact us form to send messages to the site - the mail enable server running on the same machine as the web server - then I check the messages using the mailenable webmail and reply them). This is really important to me, your help would be really appreciated ...

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  • Problems with login scripts on Terminal Server 2008

    - by discovery
    We are having issues with login scripts not running on Windows 2008 Terminal Server. This is a brand new implementation and they have never worked. The test user in question doesn't have any problems running login scripts on their workstation. I have tried logging into the server directly with their account, but still no scripts run. I have setup a test account with Domain Admins rights in the same OU as theirs and the scripts don't run. I can manually run the scripts from the SYSVOL\somedomain.com\Policies folder and they run fine. The Terminal 2008 Server is in a mixed 2003/2008 domain. The user can run the gpupdate on the server without error. I have also run the Group Policy Results for this user and the terminal server and everything looks good, no errors. Any suggestions?

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  • Problems locating Redmine database

    - by zordor
    I have an active redmine but I can not find the database where it is running right now. It should be on PostgreSQL but the database where it should be running is empty. Does anybody have any idea how to check current database used by redmine? Please let me know if you need any extra information. Thank you EDIT: Ok I know the database it is using. On the database.yml I have project_redmine but it is using the database project I dont know why. That database it is used by developers for the actual project. So that is getting me problems of course. I am unable to run it on the right DB (project_redmine) any ideas? :S

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  • Problems with chip fan and CPU fan

    - by JS Bangs
    I have a five-year-old ASUS motherboard that has been working fine for me for years, until I attempted to power it on yesterday and got a CPU fan speed and chip fan speed warning. Cracking open the case and powering the computer on, I can see the chip fan working, but it appears to be hitting something as it makes a very loud buzzing noise. The CPU fan, meanwhile, starts up when I power on, but slows down and stops after a few seconds! How can I address these problems? Is there any way to fix these sort of fan speed issues without just replacing the fan (which in the case of the chip fan, probably means replacing the whole motherboard)?

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  • MAC and PC problems on home network

    - by tombull89
    Hello! At home we have a wireless router that my family want to use. We have our main computer physically connected to the router, and my laptop is connected wirelessly. When the network is like this then it is faultless. However, when my brother introduces is Apple MAC into the equation, both my laptop and the family machine gets all sorts of problems, primarily long load times and timeouts. The MAC, however, works fine. I think I've read something here or SF about a MAC continusly pinging a router which times it out, but I've not found any solution so far. Router: Belkin F5D7634uk4A-H Home Computer: XP SP3 My Laptop: Windows 7, Ultimate Mac: 13" Macbook Pro, Snow Lepoard

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  • Problems enabling BitLocker on Windows 7 enterprise

    - by ericl42
    I had BitLocker turned on originally when I loaded the computer but had to turn it off to do some testing. I recently tried to turn it back on and I continue to get the following error: Blockquote A required TPM measurement is missing. If there is a bootable CD or DVD in your computer, remove it, restart the computer, and turn on BitLocker again. If the problem persists, ensure the master boot record is up to date. Blockquote I have verified that there is nothing in the DVD tray and that the laptop is not docked. I have also verified that TPM is running and I have no problems enabling BitLocker on a flash drive. I think it's a problem with my MBR since I am dual booting into Fedora as well but I am not sure how to fix it. (even though it did work a few months ago while I was also dual booted) Thank you for the help.

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  • Problems installing Linux to IDE connected compact flash card

    - by mathematician1975
    I have been trying to install Ubuntu on some hardware (Netcom NC-499 board that contains a Vortex86DX processor). I am trying to install to a compact flash card attached to the board via an IDE adaptor, the aim being that the board will boot up and simply treat the compact flash like a normal hard drive. The processor vendor claims support for Ubuntu 10.04 but I am having problems installing it onto the card. I have been trying using a USB CD-ROM drive and the standard .iso image from the ubuntu site (md5 checksum works out fine so no problem there) but I have had no success at all. I have been able to do this with Ubuntu 8.04 but with no other version (9.04 and 10.04 desktop and alternative discs all fail). My question is what other options are available to me to try and install this? I have googled myself apart trying to find out but other than a few sites describing USB based installs using flash memory sticks for very specific hardware, I have found no useful info at all. Any suggestions will be gratefully received.

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  • Problems in Linux Mint 13 MATE with NTFS partitions

    - by usr
    I'm using Linux Mint 13 MATE (32 bit). With Caja file manager (based on Nautilus 2.x) I can create, modify and remove folders and files on NTFS partitions whitout problems. But, for example, when I have a compressed file (.zip, .7z, ...) in a NTFS partition I can't extract it (with File-Roller, Peazip, ...). But I can extract the same file in a ext4 partition perfectly. What might the problem be? Are there (maybe) file permissions for each application?

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  • file-name encoding problems

    - by tenhouse
    I googled over this topic but couldn't find what I was looking for... the following "happend" to me: I had my files stored on a NTFS-USB Harddisk, because of space problems I moved them to an ext3 system....somehow the filename (content is still ok as far as I saw) encoding screwed up....my files look like the following now: Kküken <--- should have an "ü" Jäger <--- should be an "ä" Zwölf <--- should be an "ö" fünfte <-- should be an "ü" etc .... These are just examples, but already give me my first question Why has the "ü" two different representations? (Maybe I screw up, before I screw up and now I have a mixing of x different encoding-layers? :) ) I tried the following command: convmv -r -f UTF-8 -t ISO-8859-1 * This command work for some files (for example Zwölf) but not for all: iso-8859-1 doesn't cover all needed characters for: "fünfte" So Iguess it must be another encoding - but which? How can I find out this? And is there any way that I can still fix all of this?

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  • Windows XP problems displaying internet browser backgrounds correctly

    - by Samurai Waffle
    My friend has a Windows XP computer that doesn't show the colored background on pages, it's always white. On top of that some pictures won't show up, there will just be an empty white frame. Also when you left click on a folder, instead of opening it up, it opens up a new window that turns out to be the search results window. I've never heard of these problems before, and I can't find any information on the internet about it. I assume it's a virus deeply imbedded into the system, but no virus scanner has found it. Thanks for the help!

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  • USB driver problems (Windows 8.1)

    - by HelloWorld
    Every time I turn on my laptop the USB ports don't work and the drivers have an error. In order to fix this I'm forced to start the Device Manager, uninstall all the USB drivers, open the Control Panel, click Find and fix problems (under System and Security), click Configure a device (under Hardware and Sound) and then when that window pops up just hit Next until I can see my USB drivers reinstalled and working in the Device Manager window under Universal Serial Bus controllers. I found this way to fix it but I would like a permanent solution so that I don't have to do this every time I turn on the machine. Any ideas? When I bought the machine it had Window 7 installed but I later upgraded it to Windows 8.0 and then 8.1 after that.

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  • Problems while applying an svn patch to a mercurial repository

    - by user26453
    Patch file is made with TopirtiseSVN - Create Patch... Attempting to import patch into the mercurial repository using hg import patchfile. The problem I'm running into is that there seems to be problems with how hg looks for files referenced in the patch file: unable to find 'gui/gui/RemoteFramework.cpp' for patching 2 out of 2 hunks FAILED -- saving rejects to file gui/gui/RemoteFramwork.cpp.rej Seems to be an issue of where the patch was made in terms of directories and where it should be applied. Have tried playing with the --base option for hg import, but haven't gotten anywhere just yet. Anyone have any tips?

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  • Two subnets on one switch with no VLAN and possible problems

    - by casey_miller
    As far as I know in order to use two subnets on one physical cable VLAN's are recommended. However, is it possible to achieve this (i.e: two subnets on one physical network) like 192.168.1.0/24 and 10.0.0.0/8 networks. What kind of problems or hidden rocks this way contains? With VLAN's it's possible to better isolate so users wouldn't easly sniff the other network. But in my environment it's okay if user on one subnet could listen to the traffic on another network. Is it the only problem?

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  • Driver problems with rerunning WIM capture

    - by Tim Brigham
    How do I handle driver problems associated with creating a new WIM file using a previously created image as a base? I am using a custom MDT image which installs Windows 7, Office 2010, etc which was created from a previously deployed base image of Windows 7 + SP 1 + updates. When the driver injection is enabled I receive a group of messages (collected from different logs, screens, etc). If I turn the preinstall driver injection off things work as expected. If I leave it on I receive the following messages. windows cannot install required files 0x80004005 8004004 non zero return code ltiapply rc=31 Unhandled error returned by LTIApply: a device attached to the system is not functioning. (-2147024865 0x8007001F)

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  • Problems with mailenable when sending to yahoo

    - by Naresh
    I m testing sending emails from mailenable webmail. I have no problems sending mail to gmail or hotmail, both work fine, but yahoo mail shows the attachment icon for the message even though the message doesn't contain any attachments, it's just plain text. It only includes a reply to a previous message, like this: message text ----- Original Message ----- original message text I copied the message content and sent it from gmail to yahoo and the attachment icon didn't show which makes me believe it's something with mailenable. What could possibly be wrong? Also, is there a white list for yahoo mail that I can join? And also for other popular webmail? I'm going to use this on a production website (site visitors use the contact us form to send messages to the site - the mail enable server running on the same machine as the web server - then I check the messages using the mailenable webmail and reply them). This is really important to me, your help would be really appreciated ...

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  • Apache + Bind Problems

    - by Gabriel
    Hello, I am using VirtualMin on Debian-50-lenny-64-LAMP (Debian Linux 5.0). I've upgraded some packages including "bind". Since the upgrade, both Apache and Bind stopped working. Here's the errors I get: Blockquote Starting web server: apache2apache2: Could not reliably determine the server's fully qualified domain name, using 78.46.92.11 for ServerName (98)Address already in use: make_sock: could not bind to address [::]:80 (98)Address already in use: make_sock: could not bind to address 0.0.0.0:80 no listening sockets available, shutting down Unable to open logs failed! and Failed to start BIND : Unknown error I am sure that some files were changed after the upgrade and this is a simple problems to solve, but unfortunately, it's the first time I am in this situation and I just couldn't find a solution. I've Googled about the errors but still couldn't make it work. Now I am sorry I did the update. I usually make updates to have the latest versions of the packages that are installed in the server. Any ideas?

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  • Dovecot and StartSSL problems with issuer

    - by knoim
    I am using dovecot (1) and trying to get my StartSSL certificate running. ssl_key_file points to my private key I tried pointing ssl_cert_file to my public key, with and without using the class1 certificate from http://www.startssl.com/certs/sub.class1.server.ca.pem as ssl_ca_file aswell as combing them with cat publickey sub.class1.server.ca.pem chained My mail client keeps telling me the certificate has no issuer, but doing openssl x509 on my public certificate tells me it is C=IL, O=StartCom Ltd., OU=Secure Digital Certificate Signing, CN=StartCom Class 1 Primary Intermediate Server CA My option for the CSR were: openssl req -new -newkey rsa:4096 -nodes Dovecot's log doesn't mention any problems. EDIT: Doesn't seem to be a problem with dovecot. I am having the same problem with postfix. openssl verify gives me the same error.

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