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• Start building websites using Java

  - by Alex coady

  I'm a web developer and I've used PHP, along with MySQL, Javascript, jQuery etc; all of which I'm very confident with and can use on a professional level. What I'm wanting to do however, is to start using Java instead of PHP as I'm creating sites that need to be scalable. I really need a starting point. I can program in Java, I understand the language but have never used it for the web. Links, tutorials, examples would be a great help. I have also considered using Scala (the language Twitter is written in).. but don't really understand the benefits. Please no jargon; I need clear information that essentially takes me through the process of creating a very simple website using Java; I'm more than capable of building the site once that's done.. I think. I've previously used Eclipse so if assume I can. Thanks in advance!

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• Not able to safely remove external disk after having mounted and unmounted a VHD on it

  - by Agnel Kurian

  I am using Windows 7 SP 1. I have an external hard disk (Seagate 500GB) which I am able to use without problems most of the time. I am able to plug it in, use it and then safely unmount it via the "Eject USB Mass Storage Device" option in the taskbar tray. However, if I attach a VHD file located on this disk using "Disk Management", then detach the VHD and finally try to safely disconnect the disk via the system tray, I get an error which says: "Problem Ejecting USB Mass Storage Device: Windows can't stop your 'Generic volume' device because a program is still using it. Close any programs that might be using the device, and then try again later." How do I avoid this problem? Which process could still be accessing the device (even after I have closed the "Disk Management" application) ?

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• Starting services in batch file on windows 7

  - by Dima

  I have a fairly simple batch file which does just one thing - "net start myservice". This batch file gets shortcut-ed in a program group by installer so that users can simply click on the icon and get things started (or stopped). All works well in XP for the users with admin rights. But things get hairy on Win7 as the batch need to be run "as administrator" explicitly and often users don't know this. So my question is how to make this friendly? Telling users to right click and run as admin on Win7 and simply click on XP is kind of weird twist. I need a smart automatic simple thingy. I could probably use "runas/user:administrator" in the batch itself, but this "administrator" account might not be available on some machines. I'm looking for a universal solution for installing things like this on any Windows box. Ideas? How would you do this?

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• Which programs using my internet connection ? [closed]

  - by Eray Alakese

  Possible Duplicate: Monitor all and any internet traffic from my home PC - what should I use? My internet connection has 4GB quota. But my quota is run out very fast. I setup Net Limiter , for look which programs using my internet connection. But there isn't any weird program. There is only firefox.exe . So, how can i look all programs which using my connection and leech my bandwidth quota? For example, is there any CMD command ? like netstat

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• What is the recommended way to empty a SSD?

  - by Lekensteyn

  I've just received my new SSD since the old one died. This Intel 320 SSD supports TRIM. For testing purposes, my dealer put malware, err, Windows on it. I want to get rid of it and install Kubuntu on it. It does not have to be a "secure wipe", I just need the empty the disk in the mosy healthy way. I believe that dd if=/dev/zero of=/dev/sda just fills the blocks with zeroes and thereby taking another write (correct me if I'm wrong). I've seen the answer How to enable TRIM, but it looks like it's suited for clearing empty blocks, not wiping the disk. hdparm seems to be the program to do it, but I'm not sure if it clears the disk OR cleans empty blocks. From its manual page: --trim-sector-ranges For Solid State Drives (SSDs). EXCEPTIONALLY DANGEROUS. DO NOT USE THIS OPTION!! Tells the drive firmware to discard unneeded data sectors, destroying any data that may have been present within them. This makes those sectors available for immediate use by the firmware's garbage collection mechanism, to improve scheduling for wear-leveling of the flash media. This option expects one or more sector range pairs immediately after the option: an LBA starting address, a colon, and a sector count, with no intervening spaces. EXCEPTIONALLY DANGEROUS. DO NOT USE THIS OPTION!! E.g. hdparm --trim-sector-ranges 1000:4 7894:16 /dev/sdz How can I make all blocks appear as empty using TRIM?

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• Randomly and uniquely iterating over a range

  - by Synetech

  Say you have a range of values (or anything else) and you want to iterate over the range and stop at some indeterminate point. Because the stopping value could be anywhere in the range, iterating sequentially is no good because it causes the early values to be accessed more often than later values (which is bad for things that wear out), and also because it reduces performance since it must traverse extra values. Randomly iterating is better because it will (on average) increase the hit-rate so that fewer values have to be accessed before finding the right one, and also distribute the accesses more evenly (again, on average). The problem is that the standard method of randomly jumping around will result in values being accessed multiple times, and has no automatic way of determining when each value has been checked and thus the whole range has been exhausted. One simplified and contrived solution could be to make a list of each value, pick one at random, then remove it. Each time through the loop, you pick one fromt he set of remaining items. Unfortunately this only works for small lists. As a (forced) example, say you are creating a game where the program tries to guess what number you picked and shows how many guess it took. The range is between 0-255 and instead of asking Is it 0? Is it 1? Is it 2?…, you have it guess randomly. You could create a list of 255 numbers, pick randomly and remove it. But what if the range was between 0-232? You can’t really create a 4-billion item list. I’ve seen a couple of implementations RNGs that are supposed to provide a uniform distribution, but none that area also supposed to be unique, i.e., no repeated values. So is there a practical way to randomly, and uniquely iterate over a range?

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• Microsoft WPC 12&ndash;Predictions

  - by D'Arcy Lussier

  Let me start by saying I have absolutely no inside knowledge, neither through the MVP program or any other means, that is fuelling what I’m about to write. This is entirely conjecture fuelled by speculation and too much Soporro beer at a fantastic Japanese restaurant tonight. Still, I present to you… D’Arcy’s Worldwide Partner Conference 2012 Predictions!!! So what can we expect to be announced at this year’s WPC? Much more than last year I’m hoping! Last year was sort of encouraging the troops to carry on with the Windows 7 messaging even with Windows 8 looming in the distance. It also showed Microsoft’s slant towards Private Cloud in addition to Azure. This year, we’re going to see a shift to a battle cry – Windows 8 is Coming, Windows 8 is Coming! I expect we’re going to hear an RTM date for Windows 8 from Steve Ballmer tomorrow, in addition to dates surrounding Windows Server 2012. We’ll also hear some announcement around Windows Phone 8, but I’m not really sure what – that whole piece is still quite muddy; are we going to actually *see* Windows Phone 8 devices this week? That would be great, but I imagine those types of announcements might be left for Build. Speaking of Build, I’m expecting an announcement on a date for a Build conference this Fall, probably late October. If any announcements are going to be made around Office 15, the schedule isn’t hinting at it. In fact, other than Office 365 there’s not much mention of Office in the conference sessions – either a red herring, or telling that Microsoft has another announcement coming later. The tagline of the conference is “A New Era. Together.” It’s obvious Microsoft is wanting to leverage WPC to rally their partners to carry the Windows 8 banner into the field of battle this fall when it ships. D

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• How did Google get on my Mac?

  - by SamGoody

  Am running a MacBook Pro, and have never installed Chrome, Google Earth, or anything blatantly Google. Just installed Little Snitch (are there no good free firewalls for Mac?) and see that CURL is sending to Google every few minutes, as is a request to Google update and more. Little Snitch doesn't say what program setup these requests. So, how do I find out how G got on my machine, why is it sending so many requests (every minute or so) and how do I remove it (and is it there for reasons other than to help G spy on me)?

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• Install Rails on linux [migrated]

  - by Jseb

  I am trying to install Ruby on Rails. and i have followed the following link for the install https://www.digitalocean.com/community/articles/how-to-install-ruby-on-rails-on-ubuntu-12-04-lts-precise-pangolin-with-rvm. This link was helpful i was able to run it, and everything, however as soon has i restarted the computer i then go into my apps and run it again with rails s and this message occurs. The program 'rails' is currently not installed. You can install it by typing: sudo apt-get install rails But work before, what should i do, do i need to set the path of somesort?? I am not that great in linux so bear with me. I am using linux ubuntu 12.04 desktop and my user is john Thanks in advance

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• How did we get saddled with the (hierarchical) filesystem as the basic data structure?

  - by user1936

  I'm self-taught and I don't have a CS degree. The more I've been learning about data structure, the more I wonder, in this day and age, how are we still saddled with the filesystem, with directories and files, as the basic data storage structure on the OS? I understand the simplicity of it, but it seems nowadays that there could be more options available natively. As far as I'm aware, the only project to improve the basic functionality of the filesystem was ReiserFS, where you could tell what line of a file was changed by whom, and when. For instance, if I could have native tagging for files, where I could tag images, diagrams, word-processing documents, an entire code repository, all as belonging to a single project, that would really be helpful to me. Since I'm stuck in the filesystem paradigm, I know that I could put all those into a single folder/directory, but what if they already exist in disparate directories, and they need to stay there? I know there are programs out there that can do this, but why aren't they on the filesystem? Something that would be nice to have is some kind of relational feature in the filesystem, like you get with RDBMSes. I understand that that was supposed to be part of Vista/7, but that fell off the feature list too. Sure, any program can store a binary file and have any data structure it wants in it, by why couldn't the OS offer more complex ways of storing data, beyond the simple heirarchy of the filesystem?

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• Excel 2010 VBA on-start macro execution - Error

  - by Noob Doob

  I have been trying to create a macro to be executed every time I open the document. I tried to use the Open event, but it does not seem to be working. The code is below: Private Sub Workbook_Open() Cells(3, 1) = "WOWWW" End Sub (It might seem ridiculous but I am trying to make any chunk of code to work, to move further with the start-time macro). Each time I open the file, the cell (A3) does not seem to be changing. Any ideas on this? I don't know if it matters, but I don't open the file directly. I open it through opening the Excel program and then File Tab - Open - File. That is because I have a problem if I open the file directly, which is another matter.

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• Force Windows 8 to search indexed files

  - by Hrvoje

  When using search files in Windows 8 (win+f) I don't get expected results. For example, I installed VLC, it's in Program Files (86) folder, and that folder is selected for indexing. Search for files (win+f) gives 0 results. If I pin to start that exe, then it's found - but I don't want to do this, that's not the point. Where does it search for files? Is there any way to specify search locations? It doesn't use Indexing Options settings, at least it seams so. Also, searching from explorer window is kinda slow - I tried entering VLC.EXE in search box (when in c:\ root), and it takes some time to give correct results. It works, but it looks like it doesn't use indexing, rather scan all files/folders, which is slow.

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• Dropbox.py on RHEL 6

  - by Timothy R. Butler

  I'm trying to run a headless install of Dropbox on RHEL 6. The daemon seems to be running, but when I try to use Dropbox's associated dropbox.py tool to control the daemon, it fails to run with the following error: Traceback (most recent call last): File "./dropbox.py", line 26, in <module> import locale File "/usr/lib64/python2.6/locale.py", line 202, in <module> import re, operator ImportError: /home/dropbox/.dropbox-dist/operator.so: undefined symbol: _PyUnicodeUCS2_AsDefaultEncodedString I'm running the current RHEL build of Python 2.6: root@cedar [/home/dropbox/.dropbox-dist]# rpm -qv python python-2.6.6-29.el6_3.3.x86_64 (I'm not sure if this would be better suited to Stack Overflow since it is on the verge of being a programming issue, but since I'm trying to use a program straight from Dropbox, I placed it here.)

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• JCP Open EC Meeting on 30 September 2012

  - by heathervc

  The JCP program office and Executive Committee invites all Java Community members to attend the OPEN EC Meeting on Sunday, 30 September at the Clift Hotel in San Francisco.  The meeting is adjacent to The Zone at JavaOne, but no JavaOne (or any other kind) of pass is required to attend.  It is OPEN to all!  Agenda topics include: JCP.Next status/overview of JSRs 355 and 358, improving communications between the EC and the community; Open Q&A and reminders of JCP events at JavaOne & Annual awards.  Any other suggestions?  This meeting is for you.  Let us know your questions pmo at jcp.org. Or bring them with you.  Details below. JCP Public Executive Committee Face-to-Face Meeting Open to Executive Committee Members and the Java Developer Community Location: Clift Hotel, 495 Geary Street, San Francisco - Rita Room (downstairs from Lobby) Date and Time: 9/30/12, 2:00 PM - 3:30 PM See you there.  Check out all of the JCP @ JavaOne events.

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• how do I fix ati driver issue

  - by Michael

  I have little knowledge about ubuntu, but I am learning. Recently, my ubuntu 12.04 required that I update. I noticed that it was updating xorg and other things, after the update I was asked to reboot. I did. now when I start that computer up, it cannot detect any display and refuses to boot from usb. I have no idea how to recover my computer. It simply starts in what is akin to the terminal program and ask for my username and password. After that, I can enter commands. The problem may be because I manually installed drivers by copy pasting from some instructional that I now have no idea where they are, but what it amounts to is that I "built" the drivers. They were working GREAT until this update. I did this because otherwise I was unable to have sound through my hdmi. After I hand built the drivers, they worked great. After this update Ka-blam! nothing... Also, I had okay-ed lots of update sources (though all of them [xorg and such] were the stable versions, not the unstable update sources) Please help and thank you in advance. (if this is posted incorrectly or misplace, please let me know what to do)

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• Is it possible to code on two different computers simultaneously?

  - by Muhammad

  I want to work with another programmer and I want the source code to be live in real-time on both of our screens. Is this possible on the Mac OS x or Linux? We're going to be using OS X but occasionally we might need to add an Ubuntu computer too. Is there a way I can do this using ssh, any shell based program, or even a good GUI? I thought Coda might be capable of this but it's not really working. Anyone ever do this? I'm not look for a git/svn/or any other version control system. This is more of a live coding session. :)

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• Windows 7 is blocking ports

  - by Caleb1994

  I am trying to open port 80 and 3690 for HTTP and svnserve respectively. I have Windows Firewall off, and have tried temporarily disabling Mcafee VirusScan Enterprise, to no avail. According to http://www.yougetsignal.com/tools/open-ports/, both ports 80 and 3690 are still blocked. I can't think of what would be blocking them if Windows Firewall and my antivirus are disabled. Here is the output of netsh firewall show state Firewall status: ------------------------------------------------------------------- Profile = Standard Operational mode = Disable Exception mode = Enable Multicast/broadcast response mode = Enable Notification mode = Enable Group policy version = Windows Firewall Remote admin mode = Disable Ports currently open on all network interfaces: Port Protocol Version Program ------------------------------------------------------------------- 3690 TCP Any (null) 22 TCP Any (null) 80 TCP Any (null) 1900 UDP Any (null) 2869 TCP Any (null) Any help? I'm not sure what each item on the list of enabled/disabled items is, but "Operational Mode" is disabled, so I assume that one refers to me disabling Windows Firewall. I know that since Windows Firewall is off, this output might not be useful, but I figured I'd include it just in case, haha.

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• Windows 7 is blocking ports

  - by Caleb1994

  I am trying to open port 80 and 3690 for HTTP and svnserve respectively. I have Windows Firewall off, and have tried temporarily disabling Mcafee VirusScan Enterprise, to no avail. According to http://www.yougetsignal.com/tools/open-ports/, both ports 80 and 3690 are still blocked. I can't think of what would be blocking them if Windows Firewall and my antivirus are disabled. Here is the output of netsh firewall show state Firewall status: ------------------------------------------------------------------- Profile = Standard Operational mode = Disable Exception mode = Enable Multicast/broadcast response mode = Enable Notification mode = Enable Group policy version = Windows Firewall Remote admin mode = Disable Ports currently open on all network interfaces: Port Protocol Version Program ------------------------------------------------------------------- 3690 TCP Any (null) 22 TCP Any (null) 80 TCP Any (null) 1900 UDP Any (null) 2869 TCP Any (null) Any help? I'm not sure what each item on the list of enabled/disabled items is, but "Operational Mode" is disabled, so I assume that one refers to me disabling Windows Firewall. I know that since Windows Firewall is off, this output might not be useful, but I figured I'd include it just in case, haha.

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• suppress warnings from windows live mail untrusted cerficate ssl

  - by monkeyking

  Hi we have setup our own mailserver using ssl. Each time I start up windows live mail, in comes up with an annoying message that "The server you are connected to is using a security certificate that could not be verified" Is there some way to add this cerficate such that we wont see this message on every program start. When using firefox (our mailserver can also be webbased) or thunderbird, I get the option to allow the certificate without asking again. I'm perfectly aware that we can buy a certificate that will make the message go away, but this we dont want to do. Thanks edit: I have succesfully imported the certificate such that I can access the website without complains using ie, however the problem still persists in windows live mail.

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• How should I start refactoring my mostly-procedural C++ application?

  - by oob

  We have a program written in C++ that is mostly procedural, but we do use some C++ containers from the standard library (vector, map, list, etc). We are constantly making changes to this code, so I wouldn't call it a stagnant piece of legacy code that we can just wrap up. There are a lot of issues with this code making it harder and harder for us to make changes, but I see the three biggest issues being: Many of the functions do more (way more) than one thing We violate the DRY principle left and right We have global variables and global state up the wazoo. I was thinking we should attack areas 1 and 2 first. Along the way, we can "de-globalize" our smaller functions from the bottom up by passing in information that is currently global as parameters to the lower level functions from the higher level functions and then concentrate on figuring out how to removing the need for global variables as much as possible. I just finished reading Code Complete 2 and The Pragmatic Programmer, and I learned a lot, but I am feeling overwhelmed. I would like to implement unit testing, change from a procedural to OO approach, automate testing, use a better logging system, fully validate all input, implement better error handling and many other things, but I know if we start all this at once, we would screw ourselves. I am thinking the three I listed are the most important to start with. Any suggestions are welcome. We are a team of two programmers mostly with experience with in-house scripting. It is going to be hard to justify taking the time to refactor, especially if we can't bill the time to a client. Believe it or not, this project has been successful enough to keep us busy full time and also keep several consultants busy using it for client work.

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• Will an online degree get you a job that requires "CS or equivalent 4-year degree"? [on hold]

  - by qel

  I'm a nerdy slacker type who didn't get my life together till I was 30. I've had a real job for a couple years doing C#/SQL. I've gotten several raises, but I'm making less than most developers, and the atmosphere is ... not positive. Looking for a new job, I think my applications get thrown out because I don't have a degree. And I want to finish a Bachelor's just to feel like less of a loser. I have a lot of college credits from 1996-2003 and a low GPA, so I don't know if that's worth much. An online degree looks like a good option, but I just don't know what I should be looking at for online schools because they all look like fake degrees. If they had programs equivalent to a real Comp Sci degree, I don't think they would have weird sounding names like they do. University of Phoenix has a B.S./Information Technology-Software Engineering. DeVry has a B.S./Computer Engineering Technology program. But that's not CS, and most other things I see have even more fake-sounding names. Are these useless degrees? Some people say DeVry and UoP are acceptable, some people say they're a joke. I have enough experience now, though, that maybe all I'm missing is being able to check the box that I have a 4-year degree. Harvard Extension seems like a real degree, even if it isn't a real Harvard degree, but I'd have to live there at least 3 months, which kinda defeats the purpose of an online degree fitting around work.

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• trouble connecting ups

  - by Jure1873

  I've got a riello UPS connected to my server through USB. The output from dmesg is: [1362998.520035] usb 2-2: new low speed USB device using uhci_hcd and address 7 [938715.763270] usb 2-2: configuration #1 chosen from 1 choice [1363008.726243] input: Ups Manufacturing RS232-USB converter as /class/input/input7 [1363008.749408] input: USB HID v1.00 Gamepad [Ups Manufacturing RS232-USB converter] on usb-0000:00:1d.0-2 Now the program for controlling the UPS is expecting me to input the device path (/dev/ttyUSB0), but it doesn't get created. What is /class/input/input7 and where is it? Do i have to install additional drivers?

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• Can I use a wildcard to denote subdirectories as opposed to just files in the Windows Command Prompt

  - by Dinosaurus

  I know I can use a wildcard to list the files in a single directory: dir *.java However, does anyone know if it is possible to denote a subdirectory with a wildcard as well? I would like to do something like dir classes/*/*.java Where, it will list all the java files in every subdirectory beneath the classes directory. So, if there is: classes/cs1100/ classes/cs1200/ classes/cs1500/ It will list all the java files within these. Note, I'm not using this specifically for the "Dir" command, but instead another command line tool that accepts a list of files. But, if it works for Dir, it shoudl work in my other program as well.

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• Windows: Is there something to see and remotely control single(!) windows on a remote PC?

  - by Horst Walter

  Is there something where I can see and control single(!) windows of PC1 on PC2 remotely. Basically like it is possible with X-Windows. I am not talking / asking about A software which displays the whole desktop remotely (like VNC, Windows RDP). A X-windows server for windows, to connect to Linux. The answer here ( Windows Remote Desktop Connection for just a single window (or a single program) ) requires Windows Server 2008. I need to run this on two Windows 7 machines. Example: PC1 shows three windows, and I transfer, see, and control window 2 on PC2. -- Edit -- I have checked whether there is an X-Server for Windows <- Windows. But there seems not to be one other than Unix <- Windows: http://stackoverflow.com/questions/40453/what-is-a-good-and-free-x-server-for-windows

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• Extract registry key from NTBackup System State backup

  - by phoenix8

  A Windows Server 2003 machine died recently but I need some information that was contained in the now-defunct server's registry. I have a "System State" backup file created by the Windows Server 2003 built-in backup program (NTBackup.exe). Is there any way to extract a key/value out of the backup file? I might be able do a Win2003 install on a similar machine then do a system-state restore but that's a lot of effort and I don't know for certain that the system-state restore will work on a different spec machine. (Would it work if I booted up in 'safe mode'?) But I'd really rather just get at the data straight out of the NTBackup file zip-file-esque styles if that's possible.

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