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• Good source for interview-style coding problems for entry/intermediate developers?

  - by soster

  I have taught myself to code over the past few years and do not have a computer science degree. As a result, I lack experience from many things, such as the basic homework/test questions many CS graduates take for granted. I recently had a tech screen interview where I fumbled and struggled to finish a (relatively) common question, I believe due to this inexperience. My question to all of you is this: do you know a good source for a bunch of these problems that includes answers, for an entry/intermediate developer who is trying to gain coding problem solving experience? The ones I've been able to find on the internet are for coding teams, so they're a bit too complicated for me. Thanks so much in advance.

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• Resource Managers - Are they any good?

  - by The Communist Duck

  Hey. I've seen many a time in source code, things like this [well, this is more of a pseudo C++ idea of mine] type defshared_ptr ResourcePtr;// for ease ResourcePtr sound1 = resourceManager.Get("boom.ogg"); sound1-Play(); ResourcePtr sprite = resourceManager.Get("sprite.png"); I was just wondering how useful a class like this was, something that: Loaded media files Stored them in memory Did this at the start of a level - loading screen. Cleaned up Rather than having a system of: Resources are held by entities only, or loose. Responsible for own load into memory. The first is a 'manager' as such; something I feel indicates it's wrong to use. However, it allows for something like a vector of resource names to be passed, rather than having to scramble around finding everything that needs to be loaded.

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• Windows Phone 8 : pas d'upgrade possible depuis Windows Phone 7, une version 7.8 est annoncée pour consoler les « early adopters »

  Windows Phone 8 : pas d'upgrade possible depuis Windows Phone 7 Une version 7.8 est annoncée pour consoler les « early adopters » Comme redouté, Microsoft vient de confirmer que l'upgrade vers Windows Phone 8 pour les modèles actuels ne sera pas possible. « Windows Phone 8 est un changement de génération technologique, ce qui signifie qu'il ne pourra pas tourner sur le hardware existant », écrit Joe Belfiore. « MAIS nous nous soucions profondément de nos clients existants et nous voulons que leurs téléphones restent à la pointe. C'est pour cette raison que nous inclurons le nouveau Start Screen à une prochaine mi...

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• 12.04 gnome shell broken after updates

  - by nat

  I'm running Ubuntu 12.04, and using gnome shell. I've had my machine running for the last few days, and I've been installing updates as the update manager bugs me. I just rebooted, and now gnome won't start. I can use gnome classic and unity, but gnome 3 isn't working at all. When I log in, the screen is black for maybe 20 seconds, but the cursor shows. Then, my wallpaper, but nothing else shows up. I can get a terminal with ctrl+alt+t, and I tried to run gnome-shell, but it segfaulted.

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• How do you set the movement speed of a sprite?

  - by rphello101

  I'm using Slick 2D/Java to play around with graphics. Getting an image to move is easy: Input input = gc.getInput(); if(input.isKeyDown(sprite.up)){ sprite.y--; }else if (input.isKeyDown(sprite.down)){ sprite.y++; }else if (input.isKeyDown(sprite.left)){ sprite.x--; }else if (input.isKeyDown(sprite.right)){ sprite.x++; } However, this is called on every update, so if you hold up, the sprite moves to the edge of the screen in a few hundred milliseconds. Since coordinates are integers, I can't add less than 1 to slow the sprite down. I'm assuming I must have to implement a timer of some sort or something. Any advice?

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• Yet another suspend/wake up problem [closed]

  - by user30591

  Hello dear friends and earthlings, I have some serious issue with waking up... It all worked 3 days ago and after an update it.. just stopped... i had no problems with it but now i just cant resume from the suspended mode... the screen wont turn on and nothing will happen... which is (sorry for using strong language) so i need help! i have not the slightest idea what could be the reason. Thx a lot!

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• Drawing line from sprite with a touch

  - by Kaizer

  I am working with cocos2d for the iPhone and I have a question about how to implement the following. I have a circle shaped sprite on my layer. When I touch the sprite and move my finger a line must be drawn from the sprite to where my finger is. When I move my finger on the screen the line must follow (straight line). When I release my finger the line should disappear. In a good looking way I should be able to restyle the line into an arrow. Can anyone move me in the right direction for this ? Kind regards

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• My ubuntu 11.10 gets weird lately

  - by The questioner

  I have quite a lot problems lately(about 2 weeks) running Ubuntu 11.10. First, flash playback in chrome hangs and lags all the time. While in Firefox is better, but still lags. Playing video files in the preinstalled Movie Player lags too. Second, I've turned automatic on and in some occasions, after I switched the computer on and successfully loaded the desktop, however, in just a minute or so, the screen just got black out and directed me back to the login page. I thinks there are bugs, please tell me how to correct those. Sysinfo: CPU: i5-2400 MB: GA H61M D2P B3 (no video card) Drive: Intel 320 40GB Thanks. p.s. should I upgrade to 12.04??

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• Linux (Ubuntu 12.10) starts up, but the main menu on the left side, and the pictograms at the upper right corner, do not show up

  - by user114220

  Linux OS (Ubuntu 12.10) starts up (user login, my personal picture of a beautiful Norwegian fjord-landscape fills the background), but the main menu on the left side, and the pictograms (battery state etc.) at the upper right corner of the screen, do not show up. This occurred yesterday quite suddenly after six or seven weeks working with Ubuntu 12.10. Then I started in recovery mode and performed a file system check (fsck) but that takes hours and finally a message ¨Sorry Ubuntu has experienced an internal error etc¨ appeared. How can I determine what has gone wrong and eventually, how can I solve it? So that I can work again using Ubuntu 12.10 (on a dual-boot system, Intel i7, ASUS P8P67 motherboard).

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• Upgraded Ubuntu from 12.04 to 12.10 Ati radeon HD 3450 Catastrophe!

  - by minime

  When I had upgraded everything was ready on the screen om my computer and with my 12.04 ubuntu. When I restarted my system, the graphics card was not detected. I was forced to start the computer in low graphics mode, and eventually I had a pink deskop with only my maps, and no other programs at all. What do I do now? I need to recover the pictures on my system so that I can upload them online. I'd done a graphics card test on the terminal initially, and it showed that the card was compatible with unity 3D. I have an ATI radeon HD 3450 and I was running a 32 bit build of Ubuntu 12.04 initially Right now I have a broken install of Linux, with no working graphics card or desktop to start from, so I'm unsure of how to fix this.

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• Neither suspend nor hibernate in 12.10 lubuntu - is there a workaround by scripts?

  - by J.-S. Farinet

  I've neither suspend to ram nor to disk in 12.10 lubuntu (i suspect there might be a kernel issue but i'm only a simple user). Also, the xfce powermanagement which comes with lubuntu by default does not have any effect. Even it doesn't lock the screen when i set this in the preferences: What do when close the lid. So, on a portable that's annoying a lot. Is there some way to workaround by scripts in 'etc/pm/*.d'? TIA for any idea.

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• 13.10 suspend kills wifi

  - by ser

  i tried to post to this thread Hardware wireless switch has no effect after suspend and 13.10 upgrade for if i understand their question i am having the same problem but the answer option won't work for me and maybe i am not supposed to post there anyway, i dunno lol...ack when i come out of suspend, the wireless is disconnected with the only way to get it to reinitialize/be recognized is to do a full restart. at first i thought it was my gnome shell (for lock screen disappeared there with 13.10) but when i switched to the default ubuntu it's still doing it and it's kinda driving me nuts for i have to reopen all my files and browsers/tabs/windows everytime. i'm only a geekling so i don't know how to show the terminal stuff the above asker shows, but it sounds like the same issue and it only started with 13.10 upgrade a few days ago. any help would be much appreciated!!! thanks so much ser

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• Desktop in Kubuntu lacks bars and quite everything after trying to apply Plymouth fix for proprietary drivers

  - by Michcioperz

  I'm running Kubuntu 13.10, my computer's graphics card is Nvidia GT 520. I tried to fix that Plymouth's problem with proprietary graphics driver using an old script I found on the internet (it was coded for Natty, now that I think about it I shouldn't have done it). I ran that script and rebooted my computer. First incorrect behaviour I noticed was that Plymouth only displayed its text splash only on 1/4th of the screen, though when I pressed Esc key the logs were displaying correctly. Main problem appeared when I logged in. All my desktop's windows lack menu bar, can't be closed with Alt-F4, and they don't appear on the task bar. I tried fixing it by reinstalling GRUB a few times, purging /etc/grub.d and /boot/grub, but only the text splash issue was fixed. How can I fix that?

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• Random List of numbers in C

  - by Ant

  I have just started a C programming course and so far have only done the basics like printf, read a little on variables etc on the course book. The teacher has tasked us with writing a program that will take a value entered by the user, this will be the number of students in the class (25 at the moment but can be variable). It will then list the number of students randomly and place them in 3 columns. The purpose is to sort students into groups of 3 randomly, then display on the screen in columns. Now my question is not for the code that defeats the object of me attempting the exercise, but how to structure it. I can see that using an array can be used to display the list, but really after some pointers on how best to approach the problem in blocks, then I can attempt to program each block.

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• How to keep a window from overlapping into another workspace?

  - by user1477

  It's annoying to me how if a window is even a couple pixels off the right edge of my screen, when I switch to that right workspace, the system thinks that the window is there. The unity launcher bar gets hidden because of it and switching to that window keeps you on the current workspace where you can't even see the window cause it's only a couple pixels. KDE seems to do this much better where when you switch to another workspace, the window just isn't there. But well I don't want KDE. Any way of getting that same behavior without the switch?

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• Monitor Settings

  - by user171625

  I'm having some viewing issues when I plug my projector in to view video. At first, the video didn't appear through the projector, only the computer screen. The projector just showed the desktop. I restarted and tried again, and it worked at first, but then the picture from the streaming video would freeze (the audio continued working) and I could do nothing. I had to manually shut down the computer. This happened a few more times before I gave up. Is there anything I can do about this?

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• Ubuntu 14.10 no GUI or term login

  - by Lito

  I have updated yesterday my Ubuntu 14.10 installation with apt-get dist-upgrade. I was working all afternoon and after that I have rebooted computer. Once done it, lightdm doesn't starts (only gnome logo) and I can not view any of Ctrl + Shift + [1-6] terminals (cursor is blinking). I have read a lot of posts with no success: nividia/intel conflicts (I have a laptop with an Intel graphic card) I have enabled nomodeset and tried all this options My computer boots to a black screen, what options do I have to fix it? I have repaired grub I can load recovery/livecd/windows and mount partitions and network without problem I have all packages and system updated Here my logs. X11 not shows any error or problem, is loading all needed drivers without problem. How can I raise the level of debug? Best regards.

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• cocos2dx beginner tutorials

  - by Skeith

  I have tried to start programing with coco2dx but i have no idea where to start and the tutorials are no very not very helpful. What i am looking for is some tutorials/guides on how to begin using cocos2dx for the total beginner. Things like how to setup a project and run it and how to do simple things like draw graphics on the screen, play sounds and get input. I am running on windows 7 and have been told by the cocos2dx wiki that this may cause problems so if anyone has a solution to this that would also be helpful.

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• How to change color of the frame of a maximizing window

  - by SteliosSk

  Though I have read and tried some advises regarding the change of colors in a theme, I found no answer regarding my question, which is: When I drag a window to the left (or right or up) side of the screen an orange frame shows up, indicating the area that the window will occupy. This frame is in orange. Can you please inform me how can I change this color to blueish, to match my theme? At this point, I would like to inform you that Zorin OS has this blueish frame instead of orange, but I do not know where this color comes from.

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• Settings messed up after crash

  - by ChocoDeveloper

  After an abrupt shutdown many settings were messed up: #1 Firefox was a mess. Bookmarks were gone, and I couldn't even add new ones. I had to reset firefox from safe mode and install all my addons and configure everything. This was a pain but is now solved. #2 The background in the login screen shows the one I chose with Ubuntu Tweak for a second, and then it puts back the default one. I tried changing it again with Ubuntu Tweak but it's still happening. #3 All my shortcuts in the sidebar were replaced by the default ones. I re-added them manually, also a pain. So how can I solve 2? And in case this happens again, is there a way to fix everything easy and fast?

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• Debugging random reboots

  - by M132

  I'm running Ubuntu 14.04 with 3.16.1 kernel compiled from source, and when I leave my PC running for a long time, it always reboots after about 4-8 days. Nothing is displayed on the screen, everything just freezes for about 3 seconds (and if there was any sound playing, it keeps repeating over and over), and then reboots. This issue also affects kernels compiled by Canonical's build bots. I already tried to debug it with: rsyslog kexec-tools netconsole kernel module None of them seem to be working however. Are there any better methods to check, what exactly fails here? If there's an issue with RAM for example, shouldn't kernel report this in dmesg, or cause a kernel panic?

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• dos games with dosbox running slow

  - by NeuroShell

  i have AMD E-450 1.65ghz, 4gb DDR3 ram, HD6320 laptop with dual boot ubuntu 13.04 and win 8.1, my main gaming rig(desktop pc) is with win7(so i am not playing serious games on this laptop) and for university i mostly use ubuntu(unix and programming tasks), for some free time i found dosbox on ubuntu software center and tryed playing several games(blood, syndicate wars) and all of them lag like hell(although on win 8.1 they work perfectly). So any suggestion how to solve the problem? i am using drivers X.org (in software settingsadditional settings) tryed proprietary ones but all screen colors was kinda strange and i couldn't control brightness at all... same dos games was lagging too.

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• Can not login to Normal mode

  - by Technology is good

  I installed ubuntu 12 in my old PC Acer Power Series. After installation i got the Login Screen which appears unusally big. when i logged-in in some fail-safe mode. I got the normal ubuntu running. but if i restart the system i can login using fail-safe mode but i can't login normally. I think the problem must be i don't have a graphic card. Even if i do have one that must be very very low configuration one. Kindly help me with graphic card config if that is the problem with my PC. I just want to use ubuntu for normal documentation purpose. I am new to ubuntu so techcies help me with basic guidance. Thank you. Karthik Muralitharan

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• Machine check error on ASUS while booting from USB

  - by user100453

  I put the last Ubuntu iso on my USB stick using UNetBootin, after formatting it to fat32. I've already done that before with other operating systems and it worked. I can't actually boot Ubuntu from USB since I get a black screen with the error "Machine check error" on top the an automatic reboot happens. The error appears right after the boot, I can't see anything else before. I'm using my ASUS X54L latop. Does anybody know how to solve this? Installation from CD/DVD works.

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• Gnome breaks Unity [on hold]

  - by user208020

  I just did a clean install of Ubuntu 13.10. I thought I'd play around with the GNOME desktop so, I installed it. However, it now seems there is no going back. When I attempt to switch back to Unity from the login screen, I get a hybrid of both Unity and GNOME. I have two questions: How do I restore Unity? It appears to be broken. I've also heard that Cinnamon breaks Unity in 13.10. What desktops are currently compatible with 13.10?

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