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• Problem on login: Freeze just before user selection

  - by Diego Garcia

  Hi, I'm using ubuntu 10.10 and when I login it shows my login's wallpaper an appears the window where I select my user without showing it and then gets frozen. No mouse response, no keyboard responde (even if I try to num/caps lock). I tried with safe mode and same thing happens, but in that case it freeze when trying to load some USB stuff, I tought it was my USB headset or my mouse so I disconnected them but doesn't works. Any advice on how to fix this, how to login to try an update or how to post more information?

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• Very good book for learning ADF

  - by kishore.kondepudi(at)oracle.com

  Am back!!!Its been a long time i have penned in here.Past month i got a bit Androided ;) with my new Captivate and experiments with Android.I promise to give looots of things coming weeks.Before that i have been getting many comments and mails from people interested in learning ADF to suggest a god book.While there aren't many out in the market now,the one by Frank Nimphius is very very good.I have gone through the book and its very apt for learning and getting to know the horizon of ADF.It has almost everything from Model,UI,Skinning,Internationalization,Security,Reusing lots and lots of ADF stuff.I recommend the book for all beginners and learners for ADF.In case you are in India you can order it to your home from flipkart directly.Here is the listingThere are two versions of the same book one is an international edition and another one is indian print from TMH.The cost is 585/- rupees for the indian one.The book is titled Oracle Fusion Developer Guide: Building Rich Internet Applications With Oracle ADF Business Components & ADF FacesEconomical price and an excellent book.Grab yours now and plough ADF ;)

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• Byte Size Tips: How to Change Your Computer Name on Mac OS X

  - by The Geek

  When you’re sharing stuff back and forth between your computers, the names of those computers actually start to matter — in my case, I upgraded to a new MacBook Air because my old one has a dead screen and is out of warranty, so I made it into a desktop with an external monitor. That’s when I got an error that my two Macs had the same name. Oops! Luckily it’s an extremely easy fix. Just open up System Preferences, go to Sharing, and change the computer name. Done! You can also change it from the Terminal using this command, though obviously it’s much simpler to just change it under Sharing.     

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• Running scripts from another directory

  - by Desmond Hume

  Quite often, the script I want to execute is not located in my current working directory and I don't really want to leave it. Is it a good practice to run scripts (BASH, Perl etc.) from another directory? Will they usually find all the stuff they need to run properly? If so, what is the best way to run a "distant" script? Is it . /path/to/script or sh /path/to/script and how to use sudo in such cases? This, for example, doesn't work: sudo . /path/to/script

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• How to know my free disk space on web hosting server?

  - by Abu

  I have got some work from my friend for updating his website. Earlier his website was made by some other person and he used to maintain all the stuff. Now that developer has given only the ftp username and password to my friend. He asks me to update his website. But the problem is I don't know how to access the things for this particular web hosting account like knowing the available free space, accesing email account, etc. I asked him about website control panel but he says that he doesn't know about. Is there any other site/client program/control panel that I can use to manage that website. So can any one help me out?

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• Need help starting with a game in Flash/AS3

  - by Hossein

  Hi, I am kinda new to flash/AS3. I have written some stuff and now I now the basics of AS. I want to develop a game in which my character moves. exactly like the way Super Mario moves(the background changes and new obstacles come in the way like and animation with which you can interact by climbing and shooting etc.) There is one big thing that I don't understand is that how to make my background moving and introduce new obstacles when my character moves forward. Currently my scene is static which means the background is the same and obstacles are also stationary. Can some point me to a tutorial or give me an answer that solves my confusion? thanks

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• Understanding Ajax crawling of search site

  - by vacuum

  I have a couple of questions about Ajax crawling of site, which is kind of search engine itself. The base article explains the mechanism of making AJAX application crawlable. All this stuff with HTML-snapshots is clear and easy to implement, but I cant understand where will Google bot will get "the crawler finds a pretty AJAX URL"( ie www.example.com/ajax.html#key=value) to work with. First thing, that came on mind - is breadcrumb. In sitemap we can specify pages with breadcrumb on it. so bot will go to these pages and get HTML-snapshots from here. But I'm sure, there are exists other ways to give bot this "pretty AJAX URL". In our case, we have simple search site, where user enters keyword, presses "Find", js execute Ajax request, receives JSON reponce and fill page with results(without any refresh of course). In this case - how to make google bot crawle all the presults in addition to sitemap? Is there some example of solution, described in article above?

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• Python interview questions

  - by Andy

  I am going to interview within two weeks for an internship that would involve Python programming. Can anyone suggest what possible areas should I polish? I am looking for commonly asked stuff in interviews for Python openings. Apart from the fact that I have already been doing the language for over a year now, I fail to perceive what they can ask me. Like for a C or C++ interview, there are lots of questions ranging from reversing of strings to building linked lists, but for a Python interview, I am clueless. Personal experiences and/ or suggestions are welcomed.

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• Fade out Label / Button / Status Bar with GTK

  - by wolfv

  What is the easiest way to fade out and fade in elements in Python / GTK 3? Coming from webdevelopment, my initial take on this problem was to call c = widget.get_style_context(), c.remove_class('visible'), c.add_class('invisible') but that didn't work out (Do I have to call something like "redraw"?) I also added a transition to the GTK CSS. Thanks, Wolf EDIT: I might specify what I would like to achieve: I have this "statusbar" which is just a vertical container on my app (like in the screenshot on top of this page http://uberwriter.wolfvollprecht.de/). If the mouse is not moving, I want to fade all that stuff out (also to preserve computing power // no recalculation of word- and char count) and to minimize "distraction"). I already found the appropriate event to listen to (motion-notify-event), so now I only need to add a simple fade out and a timeout. If someone can point me to a solution, be it with clutter or cairo, I would be very happy.

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• Links and code from session on Entity Framework 4, Parallel and C# 4.0 new features

  - by Eric Nelson

  Last week (12th May 2010) I did a session in the city on lot of the new .NET 4.0 Stuff. My demo code and links below. Code Parallel demos http://gist.github.com/364522  C# 4.0 new features http://gist.github.com/403826  EF4 Links Entity Framework 4 Resources http://bit.ly/ef4resources Entity Framework Team Blog http://blogs.msdn.com/adonet Entity Framework Design Blog http://blogs.msdn.com/efdesign/ Parallel Links Parallel Computing Dev Center http://msdn.com/concurrency Code samples http://code.msdn.microsoft.com/ParExtSamples Managed blog http://blogs.msdn.com/pfxteam Tools blog http://blogs.msdn.com/visualizeparallel C# 4.0 New features http://bit.ly/baq3aU  New in .NET 4.0 Coevolution http://bit.ly/axglst  New in C# 4.0 http://bit.ly/bG1U2Y

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• Should a programmer know Linux ?

  - by Maxtor

  I'm a PHP/Python programmer learning Java and C#(.NET). My main OS is windows 7 but I've used Linux and currently dual-booting with Ubuntu. My Linux knowledge however, is pretty limited. I can work with the command line on simple tasks but that's pretty much it. I don't do any shell scripting, don't know very well the most important commands, nor the system in general. My interests are web development, mobile apps and maybe some embedded stuff in the future. Should I get myself familiarized more with Linux ? Even if at the moment I'm not that interested in it? Is it a must for future job positions considering my field of interest? Thank you.

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• Skype, green screen, no microphone

  - by EddyThe B

  I have issues with skype using my brand new System 76 Galago Ultrapro, running Ubuntu 13.04. I installed Skype through ubuntu software centre (after allowing Canonical partner stuff), but it won't work, the video is a green screen, and it won't connect to the microphone. The webcam works when using Cheese, and the microphone appears to work in general (it shows sound levels when I go to the Input tab under the Sound settings). I tried to fix the green screen issue using this command: $ echo -e '#!bin/bash n LD_PRELOAD=/usr/lib/i386-linux-gnu/libv4l/v4l1compat.so /usr/bin/skype' | sudo tee /usr/local/bin/skype sudo chmod a+x /usr/local/bin/skype as suggested here: http://debianhelp.wordpress.com/2012/09/28/to-do-list-after-installing-ubuntu-13-04-aka-raring-ringtail-operating-system/ but no luck. Any ideas? I have also asked this question to the System 76 tech support folk.

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• genetic algorithm for leveling/build test

  - by Renan Malke Stigliani

  I'm starting o build a online PVP (duel like, one-to-one) game, where there is leveling, skill points, special attacks and all the common stuff. Since I never did anything like that, I'm still thinking about the maths behind the level/skill/special balances. So I thought good way of testing the best/combo builds would implement a Genetic Algorith. It'd be like that: Generate a big portion of random characters Make them fight, level them up accordingly to the victories(more XP)/losses(less XP) Mate the winners, crossing their builds, to try to make even best characters Add some more random chars, emulating new players Repeat the process for some time, or util find some chars who can beat everyone butts So I could play with the math and try to find the balance where the top x% chars would be a mix of various build types. So, is it a good idea, or there are some other easier method to do the balance? PS: I like this also, because it sounds funny

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• Oracle's Thirteen Engineered Systems

  - by Luis Moreno Campos

  You already need a catalogue to keep up with the many new stuff coming out from Oracle Engineered from factory.In the Exadata portfolio you have 4 systems:- Quarter Rack X2-2 Database Machine- Half-Rack X2-2 Database Machine- Full-Rack X2-2 Database Machine- X2-8 Database MachineBut if Exadata presents a stunning portfolio, Exalogic doesn't fall behind on that by putting out 6 versions: 3 sizes (Quarter, Half and Full) with x86 processors and the same 3 sizes with SPARC based processors.Finally we have 3 new systems called SPARC Superclusters where Solaris 11 was re-engineered to take more out of the power of Infiniband: "Available in the next calendar year, the Oracle SPARC Supercluster will be available in T3-2, T3-4 and M5000-based configurations".I see Oracle delivering on it's promise to tightly integrate Hardware and Software to work closer together.

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• How to make a disk image and restore from it later?

  - by Torben Gundtofte-Bruun

  I'm a new Linux user. I've reinstalled my Wubi from scratch at least ten times the last few weeks because while getting the system up and running (drivers, resolution, etc.) I've broken something (X, grub, unknowns) and I can't get it back to work. Especially for a newbie like me, it's easier (and much faster) to just reinstall the whole shebang than try to troubleshoot several layers of failed "fixing" attempts. Coming from Windows, I expect that there is some "disk image" utility that I can run to make a snapshot of my Linux install (and of the boot partition!!) before I meddle with stuff. Then, after I've foobar'ed my machine, I would somehow restore my machine back to that working snapshot. What's the Linux equivalent of Windows disk imagers like Acronis True Image or Norton Ghost? Note: I found a similar question here.

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• Installed Ubuntu in VMware Player, Black side bars / broken GUI

  - by Eric

  I recently installed Ubuntu 12.10 in VMware Player and have came up with a black sidebar, missing icons, a pretty broken GUI. Everything works just fine though. I am able to run Firefox and open termainal and all that good stuff just fine, it's just that I can SEE them on the sidebar. I have to open up a seperate window on Windows with a picture of the Ubuntu 12.10 desktop in order for me to know what to click on, but once I do click on it, it's pretty much smooth sailing from there(not counting closing Firefox and several other things). Again, everything works just fine, but when it comes to the sidebar, the GUI, the dashboard (get a completely black screen for when I open dash board), they come up as completely black, broken (visual tears and what not), and hoving over them just brings up a big black bar (assuming it's the "zooming" in of the icon, but it just shows a black bar of where the icon should be). I'm not exactly sure what so do to get this to work (to fix the GUI), any ideas as to what I may do to fix this?

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• Is it necessary to read every single byte to check if a copied file is identical to the original?

  - by Koen027

  I recently learned of a program called Total Commander. It's a Windows Explorer replacement and has its own stuff to copy files. To check whether the files are identical, instead of calculation a CRC, it literally checks every single byte, one at a time, on both the original and the copy. My question is: Is this necessary? Can CRC or any other such technique go wrong? Should you, as a programmer, try and implement this perfect but slow system, or is it too extreme?

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• Can the Birds and Pigs Really Be Friends in the End? [Angry Birds Video]

  - by Asian Angel

  After landing in the Pig King’s castle the Red Bird and one of the Pigs have a startling revelation as they talk. Who knew that they had so much in common?! Angry Birds Friendship [via Geeks are Sexy] Latest Features How-To Geek ETC Internet Explorer 9 RC Now Available: Here’s the Most Interesting New Stuff Here’s a Super Simple Trick to Defeating Fake Anti-Virus Malware How to Change the Default Application for Android Tasks Stop Believing TV’s Lies: The Real Truth About "Enhancing" Images The How-To Geek Valentine’s Day Gift Guide Inspire Geek Love with These Hilarious Geek Valentines MyPaint is an Open-Source Graphics App for Digital Painters Can the Birds and Pigs Really Be Friends in the End? [Angry Birds Video] Add the 2D Version of the New Unity Interface to Ubuntu 10.10 and 11.04 MightyMintyBoost Is a 3-in-1 Gadget Charger Watson Ties Against Human Jeopardy Opponents Peaceful Tropical Cavern Wallpaper

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• PHP sqlite not working in 13.10

  - by user97954

  According to >ls /etc/php5/mods-available/ I have a pdo.ini pdo_mysql.ini pdo_sqlite.ini sqlite3.ini for example sqlite.ini contains: ; configuration for php SQLite module ; priority=20 extension=sqlite3.so and >php -i | grep pdo_ gives: PHP Warning: PHP Startup: Unable to load dynamic library '/usr/lib/php5/20121212/pdo_sqlite.so' - /usr/lib/php5/20121212/pdo_sqlite.so: undefined symbol: sqlite3_column_table_name in Unknown on line 0 /etc/php5/cli/conf.d/20-pdo_mysql.ini,/etc/php5/cli/conf.d/20-pdo_sqlite.ini, Simple stuff like this: <?php echo sqlite_libversion(); ?> Gives a blank page. Also phpliteadmin won't work either, complaining of no sqlite3 or pdo_sqlite, etc. Been all over this planet's Internet chasing leads and clues to no avail. What's wrong?

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• [JOGL] My program is too slow, how can I profile with Eclipse?

  - by nkint

  My simple opengl program is really toooo slow and not fluid. I'm rendering 30 sphere with simple illumination and simple materials. The only complex computing stuff I do is a collision detection between ray-mouse and spheres (that works ok and i do it only in mouseMoved) I'm not using any threads, just an animator to move spheres. How can I profile my jogl project? Or maybe (most probable...) I have some opengl instructions that I don't understand and make render particular accurate (or back face rendering that I don't need or whatever I don't know exactly I'm just entering the opengl world)

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• Slick and Timers?

  - by user3491043

  I'm making a game where I need events to happen in a precise amount of time. Explanation : I want that event A happens at 12000ms, and event B happens every 10000ms. So "if"s should looks like this. //event A if(Ticks == 12000) //do things //even B if(Ticks % 10000 == 0) //do stuff But now how can I have this "Ticks" value ? I tried to declare an int and then increasing it in the update method, I tried 2 ways of increasing it : Ticks++; It doesn't works because the update method is not always called every microseconds. Ticks += delta; It's kinda good but the delta is not always equals to 1, so I can miss the precise values I need in the if statements So if you know how can I do events in a precise amount of time please tell me how can I do this

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• I'm 15 years old. What would you recommend for resources?

  - by JacKeown

  Hi. I'm a 15 year old kid who seems to excel in all of his classes, likes talking in 3rd person, and wants to learn more about programming and a little about html/php stuff. I already know a little python and I'm hoping to eventually learn Java/Javascript and C. I've been looking around and I've found some online lectures like this and some other tutorials that are so mind numbingly boring and difficult to understand...I was wondering if any of you knew of any good books or other resources that would actually teach me everything I'd need to know incrementally... Thanks in advance!

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• Best practices for web page styling with CSS?

  - by adifire

  I have a website to design. I have information on how the page should look and interact. The problem is I'm not good in front-end design, and have put many many hours to get the hang of the stuff. Currently, i am getting the CSS from sample sites in github and use them to style my site, which seems to be Not a ethical way. Question: how do you style webpages? Are there some really good tools? I would be deeply appreciated if a detailed answer will bee provided or link to wiki will work as well.

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• C# books for the experienced programmer

  - by Michael Dmitry Azarkevich

  So I've been programming in C# for 3 years now (been programming in various languages for 3 years before that as well) and most of the stuff I learned I pieced together on the internet. The thing is, I want to understand C# more formally and in depth and so would like to get some books on the subjects. Any books you'd recommend? Also, I've heard good things about "C# 4.0 in a Nutshell", "Pro C# 2010 and the .NET 4 Platform" and "CLR via C#". What do you think of these? (The people at stackoverflow told me to take it here. Please, Please tell me I'm in the right place this time)

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• Switching CSS to use asset pipeline in Rails?

  - by John

  I have a lot of legacy CSS files from what was a Rails 2.x app that got upgraded to Rails 3.2.8, and I want to switch over to using the Rails asset pipeline for stylesheets. The issue is, the CSS stuff is messy in terms of huge lines of code, duplicate file names, and unorganized folder structure. After looking through individual pages, and trying to add individual stylesheets and folders into the asset pipeline and spending some cycles debugging, I realized there's probably a better approach. Is there a way to test to make sure the old CSS matches up with the asset pipeline CSS? What are some good tools for testing and debugging CSS?

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