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  • Teaching myself, as a physicist, to become a better programmer

    - by user787267
    I've always liked physics, and I've always liked coding, so when I got the offer for a PhD position doing numerical physics (details are not relevant, it's mostly parallel programming for a cluster) at a university, it was a no-brainer for me. However, as most physicists, I'm self taught. I don't have broad background knowledge about how to code in an object oriented way, or the name of that specific algorithm that optimizes the search in some kD tree. Since all my work so far has been more concerned about the physics and the scientific results, I undoubtedly have some bad habits - more so because my coding is my own, and not really teamwork. I have mostly used C since it is very straightforward and "what you write is what you get" - no need for fancy abstractions. However, I have recently switched to C++ since I'd like to learn more about the power that comes with abstraction, and it's pretty C-like (syntax-wise at least). How do I teach myself to code in a good, abstract way like a graduate in computer science? I know my code is efficient, but I want it to be elegant as well, and readable. Keep in mind that I don't have time to read several 1000-page tomes about abstract programming. I need to spend time on actual, physics related research (my supervisor would laugh at me if he knew I spent time thinking about how to program elegantly). How do I assess if my work is also good from a programmer's perspective?

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  • Sweden: Hot Java in the Winter

    - by Tori Wieldt
    No, it's not global warming, but for some reason Sweden is a hotbed of great Java developers and great Java conferences in the winter. First, all three Swedish Java Champions are on Computer Sweden's 100 Best Swedish Developers List. You can read the full Sweden's Top 100 Developers article *if* you can read Swedish (or want to use Google Translate). Congratulations to:  Jonas Bonér, CTO Typesafe Skills: In recent years worked with solutions for scalability and availability. Previously, most between programs and compilers. Other qualifications: Located behind the framework Aspectwerkz and Akka platform for developing parallel, scalable and fault-tolerant software in Scala and Java. Rickard Oberg, Neo Technology Skills: Java, and the framework in Java EE and graph databases. Other qualifications: Founder of open source projects Xdoclet and Webwork. The latter is now called Struts second Rickard Oberg wrote the basics of the application server JBoss. Founder of Senselogic and architect of CMS and portal product SiteVision. Launched frameworkQi4j. Been a speaker at Java Zone JavaPolis, Jfokus, Øredev. Mattias Karlsson Skills: Java. Good at agile system development methods and architecture. Activity: telecom, banking, finance and insurance. Other qualifications: Runs Javaforum Stockholm. Arranges the conference Jfokus.  Frequent speaker at major international conferences such as JavaOne. Holds the title Java Champion. Also, Sweden is home to some top-notch Java Developer conferences during the Winter: jDays Gothenburg, Sweden, Dec 3-5. jDays, a dynamic Java developer conference, comes to Gothenburg. In addition to conference and presentations, visitors can join any courses in Java and related technologies for free.  Jfokus Stockholm, Sweden, Feb 4-6. Jfokus is the largest annual conference for everyone who works with Java in Sweden. The conference is arranged together with Javaforum, the Stockholm JUG.  Thanks to all the Java community who keep the Java hot in Sweden!

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  • How to Search for (and Find) Solaris Docs

    - by rickramsey
    Just the other day, I went to the recently-released Oracle Solaris 11 library to search for information about the print service changes. I knew there had been changes in Oracle Solaris 11, but could not remember the new approach to printing. So, being the optimist that I (never) am, I went to the Oracle Solaris 11 Information Library on docs.oracle.com and typed "print service" into the search box. Imagine my surprise when the response back was: We did not find any search results for: print service site:download.oracle.com url:/docs/cd/E23824_01. OMG! WTF? Are you kidding me? After throwing a few stuffed animals at my computer screen, I tried again. Is search broken? Well, sort of (and I'm trying to get it fixed). In the meantime, however, there is a reasonably simple user workaround. Possibly unnoticed by most people, there is a Within drop-down menu on the Oracle search results page. If you simply open the Within menu, select Documentation, and click the little magnifying glass again, you (should) get the expected results. Is it perfect? No, but at least it's an improvement over being completely broken. - Janice Critchlow, Information Architect, Systems Website Newsletter Facebook Twitter

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  • vncserver too many security failures

    - by cf16
    I try to connect to my vncserver running on CentOs from home computer, behind firewall. I have installed Win7 and Ubuntu both on this machine. I have an error: VNC conenction failed: vncserver too many security failures even when loging with right credentials (I reset passwd on CentOs). Is it something regarding that I try as root? I think important is also that I have to login to remote Centos through port 6050 - none else port works for me. Do I have to do something with other ports? I see that vncserver is listening on 5901, 5902 if another added - and I consider connection is established because from time to time (long time) the passwd prompt appears,... right? please help, what to do? even if prompt appeared and I put correct password I get: authentication failure. how to disable this lockout for a testing purposes?

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  • wamp and xamp Php versioning

    - by Pennf0lio
    Hi, I need advice installing XAMPP with different php versions. How can I install XAMPP supporting different version of php? Before I formated my computer I used both WAMP and XAMPP for specific purposes. I used XAMPP because some of the scripts are buggy when run in WAMP, I used WAMP because it support different versions of PHP. Now I want that feature that support different version of PHP to be added to XAMPP. So I could just install 1 software for my Web Development and It would be easy for me to manage. If this is not possible can you give me an alternative solutions? Thanks Note: I'm running on Windows 7

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  • Graphics card failure, anything I could try...

    - by ILMV
    My gaming PC has decided to die, it's not the first time but usually a quick ATX reset brings it back to life. Today it didn't. I disconnect all unessasary devices so I've only got the case button / LED cables, GPU, CPU, RAM and power connected, the computer still didn't turn on. I've not got a speaker on my motherboard so found a spare one I have for testing and when the machine starts up I get one long beep and two short beeps from my Award BIOS, which apparently means a video card error. I change it with the GPU from another machine and all works well. Q: So I have a faulty graphics card (an nVidia 8800GT OC), is there anything I can try to resurect it?

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  • kill application remotely

    - by Burak
    Hello all, i have sth.bat file which launches my java program on compuiter A. i start this application from computer B by using "psstart \computerA "c:\sth.bat" ". but i when it comes to kill it in the same way, im limited with the process name. Because when sth.bat is run, i see a cmd.exe and java.exe in process list. I have to use the process name with "pskill \computerA processName". But i have more than one applications named cmd.exe and java.exe. How can i solve this problem?

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  • Send an Email at a future date

    - by Ryan
    I'd like to write up an email that gets sent out in a few days. I'd prefer to use Gmail, but I could use some other client if necessary. It doesn't look like Gmail has this feature in their labs anywhere, but it could just be hiding somewhere. Any ideas? EDIT: a bit more backstory on my particular situation. My wife is out of town for three weeks, and I've decided to email her every day while she's out. Unfortunately, I myself am going camping this weekend, so I wanted to pre-record a message that gets sent while I'm out. Unfortunately, FutureMail and FutureMe both are for sending email to yourself, probably for anti-spam reasons. I guess the best solution is to use thunderbird on my laptop (so it's shielded from power outages). Seems a little excessive to keep a computer running just to send a few emails, but whatever gets the job done :).

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  • Life and Career guidance

    - by Andrei TheGiant Haxtor
    Hello programmers. I have a current dilemma I'm pondering over. I will be graduating from high school with ~60 credits worth of community college work (pre-engineering courses), and I am wondering what would experienced programmers suggest I do with my time since I have all of the bull courses out of the way. Should I start taking computer science/engineering courses or should I take some other courses that interest me?(psych, math) The reason I am asking this is, well , I like doing a lot of self studying, especially relating to software and tech. I don't like to have the pressure of hard classes on me, so I could make up for the time lost doing the CC courses and dive deep in programming and books. I've started getting into programming recently unfortunately, since I didn't have much time b/c of my course load. Right now I am doing Java and messing around with android. I would like to get involved in web&mobile development, operating systems, and finance software. If any of you experienced people could please give me some guidance and words of wisdom, I would greatly appreciated. Sorry that this isn't necessarily related to programming. All the best.

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  • Why my laptop doesnt boot in any OS (windows or ubuntu) after RAM upgrade?

    - by qrsq
    My laptop previously had 2 slots of RAM ( 1x1Gb , 1x2GB , both were clocked at 1066mhz) and it was working on windows 7 x86 OS. I Upgraded the ram with ( 2x4GB clcoked at 1333mhz). Bios displayed 8192MB of memory and windows was working ok but (only 2.99GB of ram from 8gb was avabile). So i decided to switch to an x64 system to be able to use all the amount of memory. But the laptop wasnt able to install any os (windows 7 x64 or windows 8 x64) so i placed the 3gb of ram instead of 8gb. Then i succesfully instaled an x64 os (windows 8). After than i placed the 8gb ram back again. Now the computer doesnt boot in the os but bios is working normally. I tried also to install ubuntu , without any succes. What should i do ?? All the help will be appreciated. thanks

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  • What would cause the "gi" module to be missing from python?

    - by Catalin Dumitru
    After some not so clever editing of the default Python version in Ubuntu, from 2.7 to 3.2, I ended up breaking my entire system. After my computer imploded and everything stopped working, I tried to revert back my changes (by linking /usr/bin/python2.7 to /usr/bin/python and changing the default version in /usr/share/python/debian_defaults back to 2.7) but some things are still broken. For example when I type "import gi" in the python interpreter I get the fallowing message : >>> import gi Traceback (most recent call last): File "<stdin>", line 1, in <module> ImportError: No module named gi >>> error which appears with some programs too (eg: gnome tweak tool). I have tried re-installing python both from the software center and from sources, but the same error persists. Python -- version now returns : Python 2.7.2 and also some software packages which depend on python 2.7 are now working (for example the software center), but some things are still broken. Is there anything I can do to completely re-install python 2.7 as the default version?

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  • Does OneNote have palm rejection or a hand rest spot?

    - by Richard DesLonde
    I just bought an Acer Iconia W500. I really wanted to use it for taking notes and having all the amenities of a full blown computer without the size. Using OneNote to take notes, I notice I can't rest my hand on the screen. I have read some about this and it seems the very best solution is to get a tablet with active digitizer technology, but there aren't too many with this and it is expensive. So barring that, is there any way I can rest my hand on the tablet screen while taking notes in OneNote? Or am I relegated to hovering my hand over the screen while I write notes? Does OneNote have a palm rest area or some sort of palm rejection?

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  • Text Terminal Hardware (for Linux)

    - by DLH
    Is there any way to obtain a hardware text terminal (preferably small in size) with a screen and a keypad to connect to a Linux machine (preferably via usb)? I'd like to be able to log into a command line and do some work there while simultaneously running a graphical environment on the main display. It seems like there should be some kind of lcd screen and qwerty keypad device designed for this purpose. Does this exist, and how do I get one? Edit: I'd be happy with a small networked device as well, as long as I could get a remote terminal into my computer.

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  • Wireless driver not detected by Windows 8

    - by rksh
    I've a problem in my wireless driver on windows 8. I bought a new X500L Asus laptop and installed windows 8 on it. However the driver CD I got with the laptop doesn't support my laptop. The CD says it's designed for Windows 8.1. I tired finding Wireless driver model and finding driver online and installing and that hasn't worked either, the wireless driver is shown at the device manager as not installed. I tired live booting the computer with a live CD of Linux and that also doesn't pick up my wireless driver. Can anyone tell me how to fix it? Thanks

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  • Is my use case diagram correct?

    - by Dummy Derp
    NOTE: I am self studying UML so I have nobody to verify my diagrams and hence I am posting here, so please bear with me. This is the problem I got from some PDF available on Google that simply had the following problem statement: Problem Statement: A library contains books and journals. The task is to develop a computer system for borrowing books. In order to borrow a book the borrower must be a member of the library. There is a limit on the number of books that can be borrowed by each member of the library. The library may have several copies of a given book. It is possible to reserve a book. Some books are for short term loans only. Other books may be borrowed for 3 weeks. Users can extend the loans. 1. Draw a use case diagram for a library. 2. Give a use case description for two use cases: • Borrow copy of book • Extend loan Diagram: Use case description: 1. Borrow a copy of the book: If the person wishes to borrow a book from Derpville Public Library, he/she must be a member of the library in which case they will be allowed to issue a certain number of books. If the person is not a member, the book will not be issued to them for taking away, rather they will have to sit and read in the library. 2. Extending loan: Some books will be lent for 3 weeks while others will be lent for more than 3 weeks in which case the person borrowing has to come to the library and get the date extended. There is a limit on how much the user can extend the date of a particular book.

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  • Set Up Anti-Brick Protection to Safeguard and Supercharge Your Wii

    - by Jason Fitzpatrick
    We’ve shown you how to hack your Wii for homebrew software, emulators, and DVD playback, now it’s time to safeguard your Wii against bricking and fix some annoyances—like that stupid “Press A” health screen. The thing about console modding and jailbreaking—save for the rare company like Amazon that doesn’t seem to care—is companies will play a game of cat and mouse to try and knock modded console out of commission, undo your awesome mods, or even brick your device. Although extreme moves like bricktacular-updates are rare once you modify your device you have to be vigilante in protecting it against updates that could hurt your sweet setup. Today we’re going to walk you through hardening your Wii and giving it the best brick protection available Latest Features How-To Geek ETC The 50 Best Registry Hacks that Make Windows Better The How-To Geek Holiday Gift Guide (Geeky Stuff We Like) LCD? LED? Plasma? The How-To Geek Guide to HDTV Technology The How-To Geek Guide to Learning Photoshop, Part 8: Filters Improve Digital Photography by Calibrating Your Monitor Our Favorite Tech: What We’re Thankful For at How-To Geek Snowy Christmas House Personas Theme for Firefox The Mystic Underground Tunnel Wallpaper Ubunchu! – The Ubuntu Manga Available in Multiple Languages Breathe New Life into Your PlayStation 2 Peripherals by Hooking Them Up to Your Computer Move the Window Control Buttons to the Left Side in Windows Fun and Colorful Firefox Theme for Windows 7

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  • Install Adobe AIR on Ubuntu/Linux

    Since quite some time Adobe Technologies released the Linux version of Adobe AIR to bring web applications and widgets to your desktop. Installing new applications on a Linux system is not always as easy as switching the computer on. The following instructions might be helpful to install Adobe AIR on any Linux system. First of all, get the latest installer of Adobe AIR from http://get.adobe.com/air/ - as of writing this article the file name is AdobeAIRInstaller.bin. Save the download in your preferred folder. Now, there are two ways to run the installer - visual style or console style. Visual Installation Launch your favorite or standard file manager like thunar or nautilus and browse to the folder where the AdobeAIRInstaller.bin has been saved. Right click on the file and choose 'Properties' in the context menu Set 'Execute' permissions and confirm modifications with OK Rename file into AdobeAIRInstaller Double click and follow the instructions Using the console Open a terminal like xterm Change into the directory where you stored the download Run this command:[code]chmod +x AdobeAIRInstaller.bin[/code] Now run this command:[code]sudo ./AdobeAIRInstaller.bin[/code] The normal installer will open, install it. From now whenever you download a .air file, just double click it and it will be installed. Troubleshooting In case that the installation does not start properly, try to install via console. This gives you more details about the reasons. Should you run into something like this: [code]AdobeAIRInstaller.bin: 1: Syntax error: "(" unexpected[/code] Double check the execute permission of the installer file and try again.

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  • Error burning DVD using Devede on Ubuntu 9.04

    - by tim-myers
    I'm trying to burn a DVD in DeVeDe under ubuntu -- on my computer it's already in DVD format (a VIDEO_TS folder) but when I try and drag it into DeVeDe it says "Some files weren't video files. None added." From looking at it, all the files look like they belong there, just from doing this a few times already and seeing all the files contained in a DVD. The file extensions in the folder are: VOB BUP IFO and the files are all named like VTS_02_1.VOB. I have tried excluding the IFO files when dragging them into DeVeDe but get the same error. Is the problem in the types of files in the DVD data or is the DVD corrupt?

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  • Fonts in Google Chrome messed up

    - by user1850463
    I recently installed new fonts on my computer that my friend sent me so I can use them in Adobe Photoshop. When I downloaded the ".zip" folder containing the fonts I unzipped the folder, pressed Ctrl+A to highlight all of the font files and then I right clicked and clicked "Install". That is how I installed the fonts. Now the fonts in Google Chrome are messed up. When I go on websites such as Stackoverflow, Facebook, etc. the fonts are different and look really odd. Random parts of text are bolded or italized, etc. I'm using the latest version of Google Chrome and Windows 8 Pro. I took 3 screenshots to show you what I mean.

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  • What is your unique programming problem-solving style? [closed]

    - by gcc
    Everyone has their own styles and technique for approaching and solving real world problems. These distinguish us from other people or other programmers. (Actually, I think it make us more desirable as programmers and improves computer science) To improve, we read a lot of books; for example, programming style, how to solve problems, how to approach problems, software and algorithms, et al. Can I learn your technique? In other words, if someone gives you a problem, at first step, what are you doing to solve it? I want learn the style in which you approach, analyze, and solve a problem. EDIT: every programmer is a unique instance; each of us approach problems and converge on solutions in our own... idiomatic manner. This manner is sometimes a quirk of training, a bias of tools, but often it is an insightful nugget, a little golden hammer that cracks nuts just slightly faster then others. When answering, give your general approaches but also take a moment to identify how you look at things in ways that your peers do not. Let's call this your Unique Solving Perspective, or USP.

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  • Getting MSExchange transport Error on Server 2003 SP2

    - by Scott
    I am getting the following Error messages and do not know how to fix it. Event Type: Error Event Source: MSExchangeTransport Event Category: (8) Event ID: 3017 Date: 4/29/2010 Time: 1:21:12 PM User: N/A Computer: NETSRV Description: A non-delivery report with a status code of 5.3.5 was generated for recipient rfc822;[email protected] (Message-ID <19104335.51321272561635734.JavaMail.SYSTEM@PARROT). Causes: A looping condition was detected. (The server is configured to route mail back to itself). If you have multiple SMTP Virtual Servers configured on your Exchange server, make sure they are defined by a unique incoming port and that the outgoing SMTP port configuration is valid to avoid looping between local virtual servers. Thanks for any help you can provide.

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  • Send an email whenever file is deleted from shared folder in windows 7

    - by azmuhak
    I am running a software on several computers at my workplace and the software can run different audio and video files stored on a shared folder in a central computer. The software runs on windows 7 and every person in my company can add or remove files from the shared folder, but this privilege puts the data at risk. I was thinking of creating an email alert to my self whenever a file is deleted. I have written a windows powershell script for sending me emails from smtp server but how can I hook it up to the event of file or folder deletion in a specific shared folder?

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  • RemoteApp cannot connect to webapp

    - by user58505
    I have just set up a Server 2008 R2 machine with Remote Desktop Services. It's all running on the one server, just for a single application, which works fine locally and when using Remote Desktop Web Access on the local network. However, when accessing it over the Internet, you can log on to RD Web Access fine, but when running the RemoteApp you get the message: RemoteApp Disconnected The remote computer could not be found. Please contact your helpdesk about this error. The application and all Remote Desktop services are on a single machine. I have purchased and installed a GoDaddy Cert. It works like a charm in the local network, but I get the above message when trying to access through rdweb How can I enable the RemoteApp to function outside the local network? I think there is one or 2 steps I left out??.. Please help...

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  • Serve up PC hard drive as USB mass storage

    - by sheepsimulator
    Is there a software package available that can serve up a hard-drive internal to a PC and make it available over USB to other USB Master nodes as mass storage? Ex: take your C: or /dev/hda drive on a PC (let's call the computer PC-A), and run a driver program which makes your C: or /dev/hda drive available to external devices as USB mass storage. When you'd hook up another PC (PC-B) to PC-A via USB, it would detect a USB mass storage device, which is C: or /dev/hda on PC-A. Is this even possible? EDIT: I know that there are other ways of making data on a drive available between two different computers (eg. putting PC-A's hdd in a USB-drive-enclosure, or having PC-A make the hdd available via a network share). But I'd like to know if the method that I describe above is even technically possible.

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  • grub error: symbol 'grub_puts_' not found

    - by ladaghini
    I updated from Ubuntu 9.10 to 10.04, and after installation, the computer restarted. When grub loaded, all I get is a screen that says error: symbol 'grub_puts' not found and a useless grub prompt that looks like grub_rescue I've tried reinstalling grub from the livecd (usb drive) following this guide: https://help.ubuntu.com/community/RecoveringUbuntuAfterInstallingWindows to no avail. Sometimes, when I start up from the live usb, linux doesn't recognize the harddrive at all. It's not in the places menu, nor does fdisk list anything. If anyone can help fix up grub so it recognizes and boots up the two os's I have installed, I'd appreciate it. Also, I know little about grub, so try and make it easy to understand.

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