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• web services, J2EE, spring, DB integration project ideas- maybe data mining related?

  - by sj88

  Hey guys, I am a graduate CS student (Data mining and machine learning) and have a good exposure to core JAVA (3 years). I have read up a bunch of stuff on Design patterns J2EE Web services( soap and rest) spring and hibernate Java Concurrency - advanced features like Task and Executors. I would now like to do a project combining this stuff (over my free time of corse) to get a better understanding of these things and to kind of make an end to end software (to learn the best design principles etc + svn, maven). Any good project ideas would be really appreciated. I just wanna build this stuff to learn so I dont really mind re-inventing the wheel. Also, anything related to data mining would be an added bonus (fits with my research) but absolutly not necesary (since this project is more to learn to do large scale software developement)

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• Ubuntu - prettier bootloader

  - by Matthew

  I hate how when I turn on the computer it just (after the hp logo, which I hate having also), shows white text on a black background. I'm wondering if there's easy ways to customize this (I'm choosing between Windows 7 and two separate Ubuntu 10.10 installs). I've read a little about some complicated ways to do this, but is there not some simpler ways by installing a package on ubuntu or something? I don't want to hack a bunch of code together to get a simple effect. I'm hoping for actual images and having like the windows 7 logo and ubuntu logo to choose from. Ideas?

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• Sorting a REALLY BIG delimited text file in UNIX / VMS [closed]

  - by gunbuster363

  Hi everyone, I am going to sort a REALLY BIG delimited text file, say 250Mb (or a bunch of files of more or less than 250Mb) . It have 37 fields, and I need to sort it by 5 fields, for example 1st, 4th, 5th, 6th 7th fields. Under Unix / VMS, do I have a good option to do this FAST? I can write COBOL program. Now I am trying to sort them using the below command, but it already run for a long time and just not going to finished. Thank you. The command I used: time sort -t ',' -o sorted.txt +0 -1 +4 -5 +5 -6 +6 -7 +22 -23 *.DAT_gprscdr_ftpd

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• MCP 1.7.10 Java class navigation

  - by Elias Benevedes

  So, I'm new to the Minecraft modding community and trying to understand where to start. I've attempted to do it before, but dropped it to the complexity of starting and the lack of a site like this to help (Mind that I'm also semi-new to Java, but have worked extensively in Javascript and Python. I understand how Java is different from the two). I have downloaded MCP 9.08 (Decompiles 1.7.10), and decompiled Minecraft. I'm looking to mod client, so I didn't supply it with a server jar. Everything seemed to work fine in decompile (Only error was it couldn't find the server jar). I can find my files in /mcp908/src/minecraft/net/minecraft. However, if I open up one of the classes in, say, block, I see a bunch of variables starting with p_ and ending with _. Is there any way to make these variables more decipherable, to understand what's going on so I can learn by example? Thank you.

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• Developing For Windows Phone 7 Series with XNA 4.0

  - by Chris Williams

  I have a talk submitted to the Heartland Developers Conference. It's called: Developing For Windows Phone 7 Series with XNA 4.0 Here's a description: Forget Droid, Windows Phone 7 Series is the iPhone killer. If you want to learn to build killer touch-based apps for this next generation mobile device then this is the session for you. We’ll go over phone specific features and how to leverage those features with XNA 4.0 and C# I need your votes in order to give this talk. Please go here: http://www.heartlanddc.com/?p=273 and give the talk a nice high rating to indicate interest. Thanks a bunch!!

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• Is a finite state machine an appropriate solution for this situation?

  - by user1936

  I was writing some test code as an example where I had a washing machine class. It has a door state that should be open or closed, and also a running state, either on or off. I want to prevent the running state from changing from 'off' to 'on' when the door is 'open', and also prevent the door from being set to 'open' while the machine is 'on'. I have this functionality rigged up with a bunch of if statements. It feels inelegant and it could quickly turn into spaghetti code if I want to add another state that puts additional conditions on the changes of other states. I wonder, is a finite state machine a solution for this situation? Would it simplify adding states and defining valid transitions?

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• How can I use WebGL to create a tile-based multi-layer scrolling platform game?

  - by Nicholas Hill

  I've found WebGL (based on OpenGL) to be a fiendish and unforgiving framework for those learning to write HTML5-based games. Despite the presence of many examples on how to get started, I'm really struggling to understand how I could simply load a bunch of images and render them to a canvas quickly using WebGL. My specific scenario involves trying to render a map using a bespoke but simple multi-layered tile engine, where each value in a three dimensional array points to the image to use for that location in the rendered image. Think "Sonic the Hedgehog" via tilesets, tiles, maps, layers, sprites etc. Can anyone enlighten me: 1) How can I load an image that I can use as a texture in WebGL? 2) How can I dynamically select an image at run time and draw it at any co-ordinate, that I also select at run time?

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• Are we Borg?

  - by TiborKaraszi

  Is it time to stop remeber things? For real, this time? Today I needed to find two pieces of SQL Server related information. One was straight foward, I posted it on #sqlhelp on twitter and a minute or so later I had the answer. The other was a bit more involved and I asked around in our MVP mail list - a couple of hours later I had bunch of suggestions and tips. These are only examples, it could just as well have been some web-forum, newsgroup, or some other forum. We've all had cases like this,...(read more)

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• Powershell Run-As Script

  - by marc dekeyser

  Disclaimer: This script is not of my own making. I found it on a share somewhere and it is so handy I started using in a bunch of scripts. To the writer: If you're out there, somewhere, when you see this, thank you! Check if script is running as Adminstrator and if not use RunAs    # Use Check Switch to check if admin        param([Switch]$Check)        $IsAdmin = ([Security.Principal.WindowsPrincipal] [Security.Principal.WindowsIdentity]::GetCurrent()`        ).IsInRole([Security.Principal.WindowsBuiltInRole] "Administrator")            if ($Check) { return $IsAdmin }        if ($MyInvocation.ScriptName -ne "")    {         if (-not $IsAdmin)         {             try            {                 $arg = "-file `"$($MyInvocation.ScriptName)`""                Start-Process "$psHome\powershell.exe" -Verb Runas -ArgumentList $arg -ErrorAction 'stop'             }            catch            {                Write-Warning "Error - Failed to restart script with runas"                 break                          }            exit # Quit this session of powershell        }     }     else     {         Write-Warning "Error - Script must be saved as a .ps1 file first"         break     } write-host "Script Running As Administrator" -foregroundcolor redWrite-host ""

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• Handling cameras in a large scale game engine

  - by Hannesh

  What is the correct, or most elegant, way to manage cameras in large game engines? Or should I ask, how does everybody else do it? The methods I can think of are: Binding cameras straight to the engine; if someone needs to render something, they bind their own camera to the graphics engine which is in use until another camera is bound. A camera stack; a small task can push its own camera onto the stack, and pop it off at the end to return to the "main" camera. Attaching a camera to a shader; Every shader has exactly one camera bound to it, and when the shader is used, that camera is set by the engine when the shader is in use. This allows me to implement a bunch of optimizations on the engine side. Are there other ways to do it?

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• Oracle VM Virtualbox 4.0 released !

  - by wim.coekaerts

  Another great day for the Virtualbox development team. As is custom, they churn out new features and enhancements at a record pace. You can find the changelog here and you can download your version of 4.0 here. Have at it. A bunch of changes, visually a new management console, a new method to install with a base install and the extention pack (for the add-on drivers and extra features), a number of bugfixes, multi-monitor support for Oracle Solaris and Linux, it's a long list. A great product with a great user base. Check out this survey!

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• navigation menus and SEO

  - by Rodolfo

  I've always have my doubts about navigation menus effect on SEO. You know, the vertical menus on the top that show in every page in the site linking to main sections and subsections. My issue is that if not done dynamically (i.e. after page is loaded or something), from a search engine's point of view it probably looks like a whole bunch of links in the beginning of the page, and links that probably have nothing to do with the page being analyzed, so it's probably not only confusing it, but also giving link 'juice' to the wrong pages or reducing its value. When I've asked SEO people about this, I usually get a "Google is smart, they'll recognize it as a menu and ignore it" response, but I'm not convinced (and the 'Google is smart' argument sounds almost like religion discussion to me). So does it affect SEO negatively or not? Are there any official posts on this topic?

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• JavaFX - the right way to use Properties with domain objects

  - by pjm56

  JavaFX has provided a bunch of new Property objects, such as javafx.beans.property.DoubleProperty which allow you to define fields which can be automatically observed and synchronised. In many JFX examples, the MVC model class has a number of these Property fields, which can then bind automatically to the view. However, this seems to be encouraging us to put JFX properties into our Domain objects (if you assume that the Model class is going to be a domain object), which strikes me as a poor separation of concerns (i.e. putting GUI code in the Domain). Has anyone seen this problem being solved in 'real life' and, if so, how was it done?

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• Why does my RAID configuration with mdadm fail on reboots?

  - by Andy B

  I have been running Ubuntu server on my machine for 2 years and it has worked ok. I would like to speed it up by raiding a few drives. The machine is used to host my Mysql databases internally. using MDADM raid.. I have tried 2 schemes so far with the 3 drives. 2 partitions on each drive 1 for the swap 1 for the O/S both of them turned into drives raid level 5 3 partitions on each drive 1 for the boot 1 for the swap and 1 for the root. The boot I set to raid level1 and the swap and root raid drives were set to level5 Both setup worked fine for about a week, then on a reboot things fall apart. by fall apart I mean I end up with a bunch of hard drive errors on the screen and then get a grub prompt. Why do they fail on reboots? I am eager to understand what I am doing wrong thanks!

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• You know you're a "version control avoider" if [closed]

  - by kmote

  I'm in the process of trying to introduce Version/Revision Control to a team of developers who have never used it. I'll be giving a presentation that I hope will be a persuasive explanation of the importance of Version Control -- the benefits of using it and the liabilities of avoiding it. I'd like to kick it off with an amusing but instructive list modelled after the "redneck" line of jokes. Can anyone help me add to this list? "You know you're a Version Control Avoider if..." You have a bunch of files or folders with names like Engine_05212012_works_old[2].cpp You've had to explain to your boss how you accidentally overwrote production code. I don't consider myself terribly witty, but I think a little humor could be helpful in this situation. Any ideas for how to extend this list? [Bonus points if you can suggest a better moniker than "Version Control Avoider"]

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• How do I keep the Thunderbird profile in sync between multiple computers?

  - by David Planella

  I'd like to find a definitive solution to automatically keep my Thunderbird profile in sync between my laptop and my desktop computer. I'm using IMAP, so keeping the e-mail itself in sync is not an issue I can use Ubuntu One for the contacts, so that should not be an issue, either. However, there are a bunch of other files and folders in the Thunderbird profile, and I'm not sure which ones I should keep in sync and which ones I shouldn't bother about. Ideally, I'd like to use Ubuntu One to mark the required ones for syncing, but I would appreciate any help in deciding which ones exactly need to be synced.

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• What is the relevance of resumes in the age of GitHub, Stack Exchange, Coursera, Udacity, blogs, etc.?

  - by davidk01

  My resume is no longer relevant. It can no longer contain an adequate description of my technical abilities. One can get a much better sense of what I am capable of by looking at my GitHub repositories, my Stack Exchange profiles, and the various courses that I am taking at Udacity and Coursera. The problem is that I have no idea how to tell employers that those are the places to look if they want an accurate description of what I can do. Every time a recruiter contacts me I gently nudge them towards all the resources I just mentioned and I also provide a link to a publicly visible Google doc that contains my resume along with links to all those resources. Yet, they keep coming back asking for a more descriptive resume. How can I make it even more blatantly obvious that if somebody wants to hire me then they can save themselves a whole bunch of trouble by just clicking on a few links and browsing around?

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• Reminder: WebLogic Global, Virtual Developer Day November 5

  - by jeckels

  Just a quick reminder about the FREE virtual developer day focused on WebLogic (and Coherence) coming on November 5th. This day, with content tailored for developers, will guide you through tooling updates and best practices around creating applications with WebLogic and Coherence as target platforms. We'll also explore advances in how you can manage your build, deploy and ongoing management processes to streamline your application's life cycle. And of course, we'll conclude with some hands-on labs that ensure this isn't all a bunch of made-up stuff - get your hands dirty in the code!November 5, 20139am PT/12pm ETREGISTER NOW We're offering two tracks for your attendance, though of course you're free to attend any session you wish. The first will be for pure developers with sessions around developing for WebLogic with HTML5, processing live events with Coherence, and looking at development tooling. The second is for developers who are involved in the building and management processes as part of the application life cycle. These sessions focus on using Maven for builds, using Chef and Puppet for configuration and more.We look forward to seeing you there - don't forget to invite a friend!

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• After update, audio won't play throw hdmi cable

  - by ckhenderson

  Yesterday (June 7th) I faithfully updated a bunch of stuff through update manager (though I'm not sure what since I never read what I updated any more because I'm a bad person). Afterward, I discovered that I could no longer play audio through my tv via HDMI. The sound settings menu seems to have completely changed and the shell script that I wrote a week ago (with much pain and effort as I had never before written a shell script) to toggle between my laptop speakers and the HDMI cable output no longer works. When I type in pactl set-card-profile 0 output:hdmi-surround in the command line I get Failure: No such entity Presumably this means something with Pulse Audio changed but, while I'm learning a lot about the inner workings of Ubuntu/Linux, I'm not an expert and would love some help. EDIT: So I noticed that pacmd set-card-profile 0 output:hdmi-stereo seems to get everything working. Still, shouldn't there be a way to do this through the GUI as well?

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• Find out if there is a local user logged in when logging in over ssh

  - by sebastiangeiger

  I need to run some calculations on a machine that I can only access remotely but also serves as a work station. There are many of them and I want to pick a "free" one. Free means in this case that no one is logged in locally. My first try was the who command, but for some reason it only lists "selected" users and I can't really find out how they are selected. Next try: ps aux | cut -d " " -f1 | sort | uniq: better showing a bunch of demons but also the local user that was not displayed by who. My current solution is to go in and do ps aux | grep "gnome-session" which is better but still gives me a lot of junk. Ideally I am looking for something that I can include in my ssh profile that warns me about (active) local users when I log in.

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• Creating your own computer! [closed]

  - by AntonioCS

  I recently found this article on a guy that built his own computer. It's just a bunch of wire (as far as I can tell any way) and I was just wondering what would I have to learn/read/do to make such a thing (or at least to have a really basic understanding of what he did). He also made his own operating system, which I find really impressive. I know it will take a while and I am in no hurry. Note: I am a web programmer and also have done some desktop apps (a few years ago).

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• how to rename and move files according to directory names?

  - by Shan

  I have bunch of directories containing the file with the same name. I want to move these files to another directory and at the same time renaming them with the directory name so that they are distinguished and are not over-written. EDIT: All the directories are in the same directory. Destination is one directory on the system which could be anything. We read directory and read file form it and rename it exactly as the directory name and put it to the destination. An important constraint is that the name of the file is given which will be in all of the directories. Directories might contain other files bit also the one which is given Thanks a lot

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• Is there a limit of emails/pictures per Gravatar account?

  - by Steve Taylor

  I'm building a site to connect patients to doctors. Each doctor will have a profile picture. I'm quite happy to manually maintain the profile pictures as there won't be that many doctors nor will they have a need to change their picture very often, if at all. I thought of using Gravatar to host all these profile pictures. The idea is to create a single Gravatar account then keep adding email addresses to it in the form [email protected] and associating each one with a new image. Does anyone know, however, if I will run into any per-account limit? If so, it wouldn't be feasible because I would end up with a bunch of Gravatar accounts instead of just the one.

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• How would one start a website with robust and scaleable hosting?

  - by Richard DesLonde

  This question is about hardware and hosting, and how to "bootstrap" them. If you built a really great website, how could you have it hosted at low cost but so that it reassures customers that their data is safe and available. As an example, what if I have a web application I developed for small companies to use for their accounting, a replacement for Quickbooks. Aside from getting a bunch of money from VCs or Angels, how would you be able to host this so that you could guarantee your customers that their data won't be lost, and the site will always be up so that they can always get to their data?

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• Can't start x session after updating packages

  - by chaos

  I have recently upgraded to 12.04 and all seems ok except adobe flash plugin doesn't work. But one several days ago when I installed several update packages and rebooted the x session was unable to start and it automatically switches to console 1 for commandline login. What's frustrating is there's essentially no error messages when I click alt+F7 to see what's going on with the x session. There are a bunch of [ok]'s and the last line seems to be something like 'starting x font server' and it just hang there. The closest thing to an error is something like 'stopping system V compatability (*words I can't remember*) ... [ok]'. This is nearly the most frustrating experience I've ever had with linux in the past 10 years. Can anyone help me?

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