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• Read Oracle Certification Program's December 2012 E-Magazine now!

  - by Harold Green

  Hello Everyone, The big news in this edition of our Oracle Certification E-Magazine is related to a change in the way that exam results are provided at the end of the test (using our CertView tool). This significant process change for the Oracle program sets the stage for tighter integration of candidate information and exam/certifcation results. Additionally, it helps give every certification holder access to important tools available in CertView. The new process was implemented in November and so far it is going very well. Much of the success of this new initiative is due to you (following the new process)! We are continuing to work to expand the functionality of CertView to better help you use your certification as a tool to help improve your career. Also in this issue of the E-Magazine, we are announcing several new offerings. We have a new SQL Tuning certification as well as a new Exam Preparation Seminar. We have continued to release new Exam Preparation Seminars and Exam Preparation Seminar Value Packages and we are receiving good feedback. We hope that you will consider employing one of these seminars to help you prepare for your next certification exam. They are now even available on iPad! READ THE DECEMBER 2012 EDITION HERE Thank you and good luck! Paul Sorensen Sr. Director, Global Certification Programs

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• Is it possible to install and use a printer in Azure Worker Roles?

  - by lurkerbelow

  I'd like to know if it's possible to create and use a printer in Azure Worker Roles. I do know that I can install printers with basic batch commands. So I could define a batch script that would run as a startup task. something like: rundll32 printui.dll,PrintUIEntry /if /b "printer" /f %windir%\inf\ntprint.inf /r "file:" /m "printername") Question: Can I use a printer to print to file, maybe to local storage? I do need the function to print to file or atleast to have a printer installed, because I have to get the PCL output from different installed printers. Sadly I can not test it by myself. I do not have a CC to join the 90 days trial.

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• Can't pipe echo to netcat?

  - by user1641300

  I have the following command: echo 'HTTP/1.1 200 OK\r\n' | nc -l -p 8000 -c and when I curl localhost:8000 I am not seeing HTTP/1.1 200 .. being printed. I am on mac os x with netcat 0.7.1 Any ideas? #!/bin/bash trap 'my_exit; exit' SIGINT SIGQUIT my_exit() { echo "you hit Ctrl-C/Ctrl-\, now exiting.." # cleanup commands here if any } if test $# -eq 0 ; then echo "Usage: $0 PORT" echo "" exit 1 fi while true do echo "HTTP/1.1 200 OK\r\n" | nc -l -p ${1} -c done and testing with: curl localhost:8000

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• How do I make a backup of a live server?

  - by Jurily

  At my new job, I have a production server with the following qualities: Windows (XP I think), ancient hardware Absolutely vital database No backups whatsoever Everyone in the company has full admin rights, the passwords are stored in a .txt on the global share No installers, except for the OS The machine itself is sitting on a wooden shelf 5 feet above the ground against an external wall with frequent truck traffic on the other side; the shelf is already bent from the constant load Hasn't been rebooted in $DEITY knows how long, my predecessor wasn't even sure if it would survive it UPS is installed, but since everything is hooked up to it, it would last 10 minutes tops No spare parts or hardware budget How do I make a full backup with minimal impact on the server? I'm not sure how close it is to a total meltdown. For all I know, plugging in a USB stick could kill the company, and of course it will be all my fault, since "it was running fine before you touched it". The ideal solution would be a VM, so I have a test environment as well (separate of course).

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• Can a working Tomcat 6 webapp be turned into a usable .war file?

  - by Bill Cole

  Problem: I have a working webapp on a FreeBSD 8.1 Tomcat 6 test server that I need to move to a production system. The developer who last touched it (and had root on that server) has moved on and isn't helpful. The running app seems to have been deployed from a CVS server that is now unavailable. My thinking is that I would like to find a way to wrap the working webapp into a proper .war so that I can deploy it on a pristine host and (after testing) send the existing system to a very deep bitbucket. But I'm not having luck finding a way to do that. I'm a sysadmin not a developer and don't work much with Tomcat systems so I may be (likely am) overlooking something blindingly simple. I gather that I may be able to just tar up the deployed directory and untar it on the new machine, but I have a nagging feeling that there are pitfalls in that.

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• Sorting Algorithm : output

  - by Aaditya

  I faced this problem on a website and I quite can't understand the output, please help me understand it :- Bogosort, is a dumb algorithm which shuffles the sequence randomly until it is sorted. But here we have tweaked it a little, so that if after the last shuffle several first elements end up in the right places we will fix them and don't shuffle those elements furthermore. We will do the same for the last elements if they are in the right places. For example, if the initial sequence is (3, 5, 1, 6, 4, 2) and after one shuffle we get (1, 2, 5, 4, 3, 6) we will keep 1, 2 and 6 and proceed with sorting (5, 4, 3) using the same algorithm. Calculate the expected amount of shuffles for the improved algorithm to sort the sequence of the first n natural numbers given that no elements are in the right places initially. Input: 2 6 10 Output: 2 1826/189 877318/35343 For each test case output the expected amount of shuffles needed for the improved algorithm to sort the sequence of first n natural numbers in the form of irreducible fractions. I just can't understand the output.

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• XAMPP OSX Snow Leopard & php ssh2 extension

  - by Joe

  I've been having problems getting the php ssh2 extension to work under xampp on Snow Leopard in my local test environment. I understand xampp is 32 bit and so the extension must be compiled as 32 bit and have found a couple of tutorials detailing how to do this. However, compiling the ssh2 extension requires the libssh2 library to be present for the compiler to access and I'm unsure how to compile libssh2 in 32 bit and force the extension compiler to in turn find/use it - currently it just reports the libssh2 library required version cannot be found. Any help would be much appreciated!

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• harddrive problem (usb external)

  - by masfenix

  Hey guys I am using a Maxtor One Touch 3 given to my by my uncle. It is connected through USB2.0 When I plug it in, XP installs it and says "the device is ready to use". But it dosnt show up on my computer. It dosn't even show up in disk mangement. I then install Acronis Disk Director (which detects it) but marks it as offline. if i try to change it to online, nothing happens. (actually the lights on the HD blink - meaning communication and goes back into offline mode). The lights on the HD return to a solid which mean "working properly". Here is a screenshot: Is there any way to extract the data off the drive? is the drive corrupt? sitll useable? edit: DISKPART screenshot: edit2: I ran Seagate diagnostic tool and this came up: Long Generic - Started 9/10/2010 6:44:36 PM Bad LBA: 0 Unable to repair Long Generic - FAIL 9/10/2010 6:46:41 PM SeaTools Test Code: 4

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• Slash-started resources redirection in HTML with .htaccess

  - by Pawka

  I have moved old version of webpage to some subdirectory: http://www.smth.com/old/. But all resources (images, css, etc.) in HTML are linked with slash symbol at the start. So browser still tries to load them from root path. For example old/test.html contains: <img src="/images/lma_logo.ico" /> <!-- not working !--> <img src="images/lma_logo.ico" /> <!-- working !--> How can I rewrite ulrs to load resources from the "old" dir if urls still starts with "/"?

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• Ubuntu One, compressed files

  - by user8179

  I have uploaded some files to my Ubuntu One account and it seems to work great most of the time. I usually upload them directly from Nautilus by right clicking the folder, using the ”Synchronize this folder” option, and then I make sure that the file I want to upload is published. Then I usually test the whole thing by trying to download it. I right click the file again to get its URL and I paste it into my Web browser. This usually works fine. But yesterday I uploaded two compressed files – ”.tar.bz2”. When I tried to open them after downloading them with my Web browser (Opera), it failed. I found that the file was bigger than the original file (2358 B instead af 2335 B – 15 B added at the beginning of the file and 8 B added to the end), and someone at the Opera channel (IRC) at OperaNet (Europe) figured out that the reason for this is that the server compress the file again, ”without telling Opera”. So to be able to extract the file I need to add ”.gz” to the file name and then extract it twice. If I downloaded it with Firefox however, I didn't need to do that, so maybe Firefox figured this out somehow in a way that Opera does not. Someone also tried to download the file with wget and some other browser and he also got the same result as I did with Opera, that is the file is compressed a second time by the server. I guess ”the server” is the Ubuntu One server, right? So why is this? Could it be done better somehow? Or did I do something wrong when uploading the files? It also seems like this extra compressing thing does not always happen, because when I tried again a few minutes ago, the file came down with its right size (2335 B), without an extra compression. But the other file (114 MiB) was still compressed twice.

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• multicast and iptables

  - by Massimo

  I have secured a linux box, starting with iptables -P INPUT DROP iptables -P OUTPUT DROP iptables -P FORWARD DROP and after adding rules to enable specific protocols and streams. Which are the correct rules to add multicast support ? I am trying with these - for both client and server multicast : iptables -A INPUT -m pkttype --pkt-type multicast -j ACCEPT iptables -A OUTPUT -m pkttype --pkt-type multicast -j ACCEPT iptables -A INPUT --protocol igmp -j ACCEPT iptables -A OUTPUT --protocol igmp -j ACCEPT iptables -A INPUT --dst "224.0.0.0/4" -j ACCEPT iptables -A OUTPUT --dst "224.0.0.0/4" -j ACCEPT Linux 2.6.38-12 / iptables 1.4.10 Is there any internet service to test my multicast set ( pc + adsl router + provider ) ?

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• Install Trac Without Setting Up a VirtualHost in Apache?

  - by jobu1324

  I'm trying to set up Trac to test out it's functionality, and the only guides I can find online talk about setting up a VirtualHost. Right now I am under the impression that I need access to a DNS server to properly use the VirtualHost directive, and for various reasons I don't have access to one. Is it possible to set up Trac without setting up a VirtualHost? I haven't had any luck. If I run the site with tracd, it works - which means that at least part of it is set up properly. Right now all I have is an Apache Directory directive pointing to /pathToTracSite/htdocs/, and when I visit the trac location, all I get when viewing the site from a browser is an empty directory (which makes sense, because htdocs/ is empty). My server is running Apache2 I know I'm missing a lot here, because I don't understand Apache the Trac system very well - any help would be appreciated.

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• Error from DNS validation service: RFC821 4.3

  - by ferdi

  So I've managed to setup bind9 and a mail server, but it seems there is something wrong. I don't quite under stand this error: The configuration of your mail servers and your DNS are not ok! The report of the test is: mail.domain.com. - mail.domain.com - 208.xxx.xxx.xxx - lisa.domain.com Spam recognition software and RFC821 4.3 (also RFC2821 4.3.1) state that the hostname given in the SMTP greeting MUST have an A record pointing back to the same server. Can anyone explain this to me in a bit more detail, and maybe point me in a direction to solve this?

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• What's wrong with circular references?

  - by dash-tom-bang

  I was involved in a programming discussion today where I made some statements that basically assumed axiomatically that circular references (between modules, classes, whatever) are generally bad. Once I got through with my pitch, my coworker asked, "what's wrong with circular references?" I've got strong feelings on this, but it's hard for me to verbalize concisely and concretely. Any explanation that I may come up with tends to rely on other items that I too consider axioms ("can't use in isolation, so can't test", "unknown/undefined behavior as state mutates in the participating objects", etc.), but I'd love to hear a concise reason for why circular references are bad that don't take the kinds of leaps of faith that my own brain does, having spent many hours over the years untangling them to understand, fix, and extend various bits of code. Edit: I am not asking about homogenous circular references, like those in a doubly-linked list or pointer-to-parent. This question is really asking about "larger scope" circular references, like libA calling libB which calls back to libA. Substitute 'module' for 'lib' if you like. Thanks for all of the answers so far!

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• CentOS, CUPS - printer managment

  - by HTF

  I'm using CentOS 6.3, and trying to get a printer PIXMA iP4950 to work. The printer is attached via USB. I've downloaded and installed the drivers from the Cannon website, and have the printer installed in CUPS. However, when I print anything (even the test page), the job is completed successfully (according to CUPS-log), but the printer does not print a thing. I don't know how to debug this. Have tried to change logging to debug, but I don't see any errors in the error_log and the access_log says: Returning IPP successful-ok for Get-Jobs (ipp://localhost:631/printers/Canon_iP4900_series) from localhost Please note that I was able to print on another CentOS machine however with GNOME Desktop.

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• MySQL documentation writer for MEM and Replication wanted!

  - by stefanhinz

  As MySQL is thriving and growing, we're looking for an experienced technical writer located in the UK or Ireland to join the MySQL documentation team. For this job, we need the best and most dedicated people around. You will be part of a geographically distributed documentation team responsible for the technical documentation of all MySQL products. Team members are expected to work independently, requiring discipline and excellent time-management skills as well as the technical facilities and experience to communicate across the Internet. Candidates should be prepared to work intensively with our engineers and support personnel. The overall team is highly distributed across different geographies and time zones. Our source format is DocBook XML. We're not just writing documentation, but also handling publication. This means you should be familiar with DocBook, and willing to learn our publication infrastructure. Your areas of responsibility would initially be MySQL Enterprise Monitor, and MySQL Replication. This means you should be familiar with MySQL in general, and preferably also with the MySQL Enterprise offerings. A MySQL certification will be considered an advantage. Other qualifications you should have: Native English speaker 5 or more years previous experience in writing software documentation Familiarity with distributed working environments and versioning systems such as SVN Comfortable with working on multiple operating systems, particularly Windows, Mac OS X, and Linux Ability to administer own workstations and test environment Excellent written and oral communication skills Ability to provide (online) samples of your work, e.g. books or articles If you're interested, contact me under [email protected]. For reference, the job offer can be viewed here.

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• How to keep source frame rate with mencoder/ffmpeg?

  - by Sandra

  I would like to crop and rotate a video, and then encode it to mp4 or mkv. mencoder video.mp4 -vf rotate=1,crop=720:1280:0:0 -oac pcm -ovc x264 -x264encopts preset=veryslow:tune=film:crf=15:frameref=15:fast_pskip=0:threads=auto -lavfopts format=matroska -o test.mkv But when I do the above encoding, the frame rate is way too fast. The encoding options were something I found, so I don't know if that is the problem. Question All I want is to crop and rotate the video, and keep the audio/video quality as good as possible. Have anyone tried this?

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• Do I need a web service for watershed.ustream.tv?

  - by Corey

  I am looking to use the watershed.ustream.tv service for a one-time event. Do I really need my own web service? In the control panel it says “WARNING: the test web service will always approve all requests so do NOT use it in a production environment!”. I'm not looking for any advanced features, I'm not even using the chat functionality. All I want to do is broadcast a funeral service without any advertising. I've looked for support on the watershed site, but I can't find any. Any help or advise would be appreciated.

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• Windows 2012 - WDS unattend Partition

  - by joe

  I'm trying to install Windows 2012 via Windows 2012 WDS. The installer displays the following error message: the partition selected for the installation (1) does not exist on disk 0. Make sure the unattend answer file's imageselection \installimage setting references a valid partition on this computer, and then restart the installation. the unattend file (created by the "Create Client Unattend" dialog) <unattend xmlns="urn:schemas-microsoft-com:unattend"> <settings pass="windowsPE"> <component name="Microsoft-Windows-Setup" publicKeyToken="31bf3856ad364e35" language="neutral" versionScope="nonSxS" processorArchitecture="x86"> <WindowsDeploymentServices> <Login> <WillShowUI>OnError</WillShowUI> <Credentials> <Username>administrator</Username> <Domain>test</Domain> <Password>xxxx</Password> </Credentials> </Login> <WillWipeDisk>true</WillWipeDisk> <DiskConfiguration> <WillShowUI>OnError</WillShowUI> <Disk> <DiskID>0</DiskID> <WillWipeDisk>true</WillWipeDisk> <CreatePartitions> <CreatePartition> <Order>1</Order> <Type>Primary</Type> <Extend>true</Extend> </CreatePartition> </CreatePartitions> </Disk> </DiskConfiguration> <ImageSelection> <WillShowUI>OnError</WillShowUI> <InstallImage> <ImageGroup>ImageGroup1</ImageGroup> <ImageName>Windows Server 2012 SERVERDATACENTER</ImageName> <Filename>install-(4).wim</Filename> </InstallImage> <InstallTo> <DiskID>0</DiskID> <PartitionID>1</PartitionID> </InstallTo> </ImageSelection> </WindowsDeploymentServices> </component> <component name="Microsoft-Windows-International-Core-WinPE" publicKeyToken="31bf3856ad364e35" language="neutral" versionScope="nonSxS" processorArchitecture="x86"> <SetupUILanguage> <UILanguage>en-US</UILanguage> </SetupUILanguage> <InputLocale>en-US</InputLocale> <SystemLocale>en-US</SystemLocale> <UILanguage>en-US</UILanguage> <UserLocale>en-US</UserLocale> </component> <component name="Microsoft-Windows-Setup" publicKeyToken="31bf3856ad364e35" language="neutral" versionScope="nonSxS" processorArchitecture="amd64"> <WindowsDeploymentServices> <Login> <WillShowUI>OnError</WillShowUI> <Credentials> <Username>administrator</Username> <Domain>test</Domain> <Password>xxxxx</Password> </Credentials> </Login> <ImageSelection> <WillShowUI>OnError</WillShowUI> <InstallImage> <ImageGroup>ImageGroup1</ImageGroup> <ImageName>Windows Server 2012 SERVERDATACENTER</ImageName> <Filename>install-(4).wim</Filename> </InstallImage> <InstallTo> <DiskID>0</DiskID> <PartitionID>1</PartitionID> </InstallTo> </ImageSelection> </WindowsDeploymentServices> </component> <component name="Microsoft-Windows-International-Core-WinPE" publicKeyToken="31bf3856ad364e35" language="neutral" versionScope="nonSxS" processorArchitecture="amd64"> <SetupUILanguage> <UILanguage>en-US</UILanguage> </SetupUILanguage> <InputLocale>en-US</InputLocale> <SystemLocale>en-US</SystemLocale> <UILanguage>en-US</UILanguage> <UserLocale>en-US</UserLocale> </component> </settings> </unattend> Any idea why it is not working? thanks

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• Installing ubuntu 12.04 on macbook pro9,2

  - by stariz77

  I seem to have tried all the various suggested methods for installing ubuntu on a mbp, but can't seem to get anything that works and was wondering if anyone has run into any new problems with the latest non-retina models? I have a core i7 in my macbook, and model identifier is MacBookPro9,2. I have partitioned my HD using disk utility and have 700gig free space ready for the install (I haven't removed OSX Lion, it is still there in a 50gig partition). Problem: I am just getting a blank screen with a blinking cursor (unresponsive) in the top left whenever I boot from the disk. I left it for 20 minutes and nothing ever happened. This was without any boot manager, just holding "c" on startup. Attempted remedies: I have downloaded the 64 ubuntu iso from their site 3 times now and burned 4 separate discs to rule out some kind of corruption or burn error. I burned one in OSX Lion 10.7.4 and 3 on my windows 7 pc. I tried holding "alt" instead and then navigating to the windows disc to boot. Same thing happens, blank blinking unresponsive cursor. I also tried going to the EFI disc which actually brings up a menu (after saying "error prefix is not set") asking if I want to install ubuntu, test for errors or partition. All three options lead me to an unresponsive blank screen (some without cursors). I downloaded and installed rEFIt and if I hold "alt" on startup a linux penguin (Boot Linux from CD) appears in my boot options, along with the apple boot, and two others that I'm not sure of: "Boot EFI\boto\bootx64.efi from" and "Boot Legacy OS from". The "Boot Linux from CD" just takes me to the blank blinking cursor screen; again, I left if for 10+ minutes and nothing. I heard that the detection of the graphics card might be a problem and that I need change to nomodeset, but I have tried pressing F6 in all of the boot menus listed above and no options appear. Does anyone have any other suggested routes or can you see what I might have done wrong?

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• How to layout class definition when inheriting from multiple interfaces

  - by gabr

  Given two interface definitions ... IOmniWorkItem = interface ['{3CE2762F-B7A3-4490-BF22-2109C042EAD1}'] function GetData: TOmniValue; function GetResult: TOmniValue; function GetUniqueID: int64; procedure SetResult(const value: TOmniValue); // procedure Cancel; function DetachException: Exception; function FatalException: Exception; function IsCanceled: boolean; function IsExceptional: boolean; property Data: TOmniValue read GetData; property Result: TOmniValue read GetResult write SetResult; property UniqueID: int64 read GetUniqueID; end; IOmniWorkItemEx = interface ['{3B48D012-CF1C-4B47-A4A0-3072A9067A3E}'] function GetOnWorkItemDone: TOmniWorkItemDoneDelegate; function GetOnWorkItemDone_Asy: TOmniWorkItemDoneDelegate; procedure SetOnWorkItemDone(const Value: TOmniWorkItemDoneDelegate); procedure SetOnWorkItemDone_Asy(const Value: TOmniWorkItemDoneDelegate); // property OnWorkItemDone: TOmniWorkItemDoneDelegate read GetOnWorkItemDone write SetOnWorkItemDone; property OnWorkItemDone_Asy: TOmniWorkItemDoneDelegate read GetOnWorkItemDone_Asy write SetOnWorkItemDone_Asy; end; ... what are your ideas of laying out class declaration that inherits from both of them? My current idea (but I don't know if I'm happy with it): TOmniWorkItem = class(TInterfacedObject, IOmniWorkItem, IOmniWorkItemEx) strict private FData : TOmniValue; FOnWorkItemDone : TOmniWorkItemDoneDelegate; FOnWorkItemDone_Asy: TOmniWorkItemDoneDelegate; FResult : TOmniValue; FUniqueID : int64; strict protected procedure FreeException; protected //IOmniWorkItem function GetData: TOmniValue; function GetResult: TOmniValue; function GetUniqueID: int64; procedure SetResult(const value: TOmniValue); protected //IOmniWorkItemEx function GetOnWorkItemDone: TOmniWorkItemDoneDelegate; function GetOnWorkItemDone_Asy: TOmniWorkItemDoneDelegate; procedure SetOnWorkItemDone(const Value: TOmniWorkItemDoneDelegate); procedure SetOnWorkItemDone_Asy(const Value: TOmniWorkItemDoneDelegate); public constructor Create(const data: TOmniValue; uniqueID: int64); destructor Destroy; override; public //IOmniWorkItem procedure Cancel; function DetachException: Exception; function FatalException: Exception; function IsCanceled: boolean; function IsExceptional: boolean; property Data: TOmniValue read GetData; property Result: TOmniValue read GetResult write SetResult; property UniqueID: int64 read GetUniqueID; public //IOmniWorkItemEx property OnWorkItemDone: TOmniWorkItemDoneDelegate read GetOnWorkItemDone write SetOnWorkItemDone; property OnWorkItemDone_Asy: TOmniWorkItemDoneDelegate read GetOnWorkItemDone_Asy write SetOnWorkItemDone_Asy; end; As noted in answers, composition is a good approach for this example but I'm not sure it applies in all cases. Sometimes I'm using multiple inheritance just to split read and write access to some property into public (typically read-only) and private (typically write-only) part. Does composition still apply here? I'm not really sure as I would have to move the property in question out from the main class and I'm not sure that's the correct way to do it. Example: // public part of the interface interface IOmniWorkItemConfig = interface function OnExecute(const aTask: TOmniBackgroundWorkerDelegate): IOmniWorkItemConfig; function OnRequestDone(const aTask: TOmniWorkItemDoneDelegate): IOmniWorkItemConfig; function OnRequestDone_Asy(const aTask: TOmniWorkItemDoneDelegate): IOmniWorkItemConfig; end; // private part of the interface IOmniWorkItemConfigEx = interface ['{42CEC5CB-404F-4868-AE81-6A13AD7E3C6B}'] function GetOnExecute: TOmniBackgroundWorkerDelegate; function GetOnRequestDone: TOmniWorkItemDoneDelegate; function GetOnRequestDone_Asy: TOmniWorkItemDoneDelegate; end; // implementing class TOmniWorkItemConfig = class(TInterfacedObject, IOmniWorkItemConfig, IOmniWorkItemConfigEx) strict private FOnExecute : TOmniBackgroundWorkerDelegate; FOnRequestDone : TOmniWorkItemDoneDelegate; FOnRequestDone_Asy: TOmniWorkItemDoneDelegate; public constructor Create(defaults: IOmniWorkItemConfig = nil); public //IOmniWorkItemConfig function OnExecute(const aTask: TOmniBackgroundWorkerDelegate): IOmniWorkItemConfig; function OnRequestDone(const aTask: TOmniWorkItemDoneDelegate): IOmniWorkItemConfig; function OnRequestDone_Asy(const aTask: TOmniWorkItemDoneDelegate): IOmniWorkItemConfig; public //IOmniWorkItemConfigEx function GetOnExecute: TOmniBackgroundWorkerDelegate; function GetOnRequestDone: TOmniWorkItemDoneDelegate; function GetOnRequestDone_Asy: TOmniWorkItemDoneDelegate; end;

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• Is it possible to use different keyboards for different applications?

  - by Paperflyer

  What I would like is this: I would have two keyboards. One of them is "connected" to Matlab, the other is "connected" to my text editor of choice. This way, I could edit some script and still test some commands in Matlab without having to constantly switch between the applications. Basically, I would want to have an additional keyboard attached to my computer that solely controlled Matlab. That would be awesome! Is there any way to do this? Preferably with OSX, but it would be fun on Windows or Linux, too.

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• Odd IIS v6 .html file caching behavior: Ideas?

  - by samsmith

  Our loadbalancer looks for "loadbalancer.html" So today, I deleted the file, but in a browser I could still fetch it. My eyes crossed, I made sure, 3 ways, that the file was removed from the iis web site home dir. But fetching it gave a nice 200 http response, and the file. In desperation, I created a new loadbalancer.html, and put some test text in it, and then this new content was retrieved, and then I deleted this file, and THEN it finally gave the 404 as desired. How can I better understand/control this ? Thanks!

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• Tomcat 5.5 - second application returs 404

  - by Tomas Tintera

  There are two versions of web application. Want to have both on one machine so I can test upgrade. If there is one of them copied to Tomcat's webapplications directory and then Tomcat is started, it works fine. So if there is only have only ...webapplicatios\ROOT\... ...webapplicatios\myApp25\... it works fine. Or when there is only ...\webapps\ROOT\... ...\webapps\myApp26\... it works fine too. If I upload both ...\webapps\ROOT and ...\webapps\myApp25 ...\webapps\myApp26 only one of the apps will work. The other one returns 404, page not found. It's running on Windows7 and I use Tomcat 5.5. Tomcat is just default installation. Any idea what to check? How to make both running both apps? Thank you in advance for any help. I'm beginner regarding TC.

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• Am I using too much memory? (Rails on EC2 with Resque)

  - by Stpn

  I am looking at the memory usage of the Rails application (it uses background processes via Resque) and since the common answer to the question, "how many workers is too many" was "test and see", I ran some memory commands and wonder if someone can help figuring if the memory usage is high enough already, or I can still add some extra workers.. so (this is all under the maximum load): $ free -t -m total used free shared buffers cached Mem: 1756 1532 223 0 12 229 -/+ buffers/cache: 1291 464 Swap: 895 10 885 Total: 2652 1543 1108 $ vmstat procs -----------memory---------- ---swap-- -----io---- -system-- ----cpu---- r b swpd free buff cache si so bi bo in cs us sy id wa 0 0 10588 156172 13400 326476 1 6 4 0 5 4 1 0 99 0 If there is any extra info I can provide to help answer this, I would be happy to do so. If the question is strange in some way, please let me know I'd be glad to fix etc..

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