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  • Steps to create a solution for a problem

    - by Mr_Green
    I am a trainee. According to my teacher, he says that to solve a problem we should go with steps to solve it like Create Algorithm (optional) Create a Datatable: By analyzing the problem, create main concepts in those problem as columns and the related issues in the main concept as rows. Create a Flowchart based on the Datatable. (when creating flow chart, think that you are in that situation and design it in your brain) By seeing the Flowchart, solve the problem. These steps should always consider by a programmer if he/she wants to become a Software designer (not programmer). Because the above approach gives an efficient way of finding solution to a problem even the problem is small. According to him, this way of approach also works in real time scenario's. My question is: Is this really an efficient way? please share also your thoughts. Keeping beside my question I just want to share some thoughts of my teacher with you who is a good mentor for me.

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  • Canon Multitasking printer: Scanner doesn't work, printer does

    - by Holger Böttcher
    Model: Canon Prixma MG2260 I have installed to ubuntu 14.04 Trusty Tahr. Now I have the problem by my multi function device. The printer works, but the scanner doesn't! I have downloaded the Linux software of Canon for the 2200 series. I have downloaded the software of the Internet site of Canon. 6 Zip folder 3 deb. and 3 rpm. Always 1 for computer, 1 for scanner, 1 for other Thinks. I can load them on my PC and unpacking, but they do not install themselves. Does any person know what I have to do about this?

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  • Can i make a launcher shortcut perform different actions based on a condition

    - by Nirmik
    What i want to do is pretty simple to understand. I want the same launcher shortcut to act like a ON/OFF swith for eg. Like suppose i have made a launcher to start LAMPP with the command gksudo /opt/lampp/lampp start This works properly to start lampp. Now,what i want to do is,If LAMPP is not on,the launcher should execute the above command and start lampp.While if lampp is on,I want ti to execute the command gksudo /opt/lampp/lampp stop and stop lampp. I want these 2 commands to be executed by the same launcher where the command to be executed is decided on the basis of a condition(LAMPP being ON or OFF in the above example) Can i do this? and how? I guess writing a bash script and then making the launcher execute the bash script would do it.but then how do i check weather lampp is on of off?

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  • audio controls in xfce 4.8

    - by Peter
    I am seeing several questions similar to mine, but none of the answers are sufficient. I am pretty green with Ubuntu, so here goes: I was just automatically upgraded to xfce 4.8 for Ubuntu studio. The volume control no longer works in my panel. When I launch 'mixer' I don't see any settings, either. When I try to run "linux audio configuration" I get an error: JACK can only be configured with a loaded and stopped studio. Please create a new studio or load and stop an existing one. I understand that I can change the volume using command line, but I can't understand why I got upgraded to something that fails on basic features. I much less likely to recommend ubuntu to others as a result. thanks!

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  • UFW firewall still blocking SMB despite adding rules

    - by nLinked
    I have an Ubuntu PC with ufw firewall (GUI version). I have added the preset Samba service, in and out, and even tried adding the ports manually (135-139, 445, UDP and TCP, in and out), but it still blocks samba. I am trying to access a share on another PC on my LAN. If I disable ufw, it works fine. It must be still blocking something and I can't figure it out. Any ideas? I'm on Ubuntu 11.04 beta 2.

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  • Where are the systray icons for Dropbox in Ubuntu desktop 13.04 (minimal)?

    - by samvv
    I reinstalled Ubuntu desktop using the minimal CD image and the following command: $ sudo apt-get install ubuntu-desktop --no-install-recommends After that I used Ubuntu Software Center to make sure Unity supports application indicators: http://i.imgur.com/bYF162w.png. Everything works great, except for Dropbox. For some reason the icon doesn't appear in the tray, even though the application is running. Steam on the other hand runs just fine, so it seems like there is nothing wrong with the tray itself. According to this post the tray icons should be in /usr/shared/icons/hicolor/22x22/status but it doesn't contain any Dropbox icons. Neither do any of the other resolutions. The answer is a bit outdated, so I'm not entirely sure it is still applicable to the current version of Dropbox. I did the usual thing of reinstalling dropbox with: sudo apt-get purge nautilus-dropbox sudo apt-get install nautilus-dropbox But that didn't solve anything either. Does somebody know how to fix this issue?

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  • 12.04 - why does the network icon dissapear every time my machine is turned off

    - by Howard Walker
    After spending an hour or two working out how to find the network Icon, I find that when I reboot the machine, I have to go through the whole procedure again. 1. The network menu is not there - so first I have to find the terminal. This has no particular location that I can find but usually I have to type terminal in the dash. 2. Then I have to type nm-applet in terminal 3. The network manager icon then appears, but only works if the terminal window remains open. Shut down the terminal window and the network disappears. This is a pain - plus I have to type my password in every time, which is another waste of time, thought this has always been a problem. So can anyone tell me how to make the web automatically connect at startup without any intervention from me.

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  • what's wrong with this Lua code (creating text inside listener in Corona)

    - by Greg
    If you double/triple click on the myObject here the text does NOT disappear. Why is this not working when there are multiple events being fired? That is, are there actually multiple "text" objects, with some existing but no longer having a reference to them held by the local "myText" variable? Do I have to manually removeSelf() on the local "myText" field before assigning it another "display.newText(...)"? display.setStatusBar( display.HiddenStatusBar ) local myText local function hideMyText(event) print ("hideMyText") myText.isVisible = false end local function showTextListener(event) if event.phase == "began" then print("showTextListener") myText = display.newText("Hello World!", 0, 0, native.systemFont, 30) timer.performWithDelay(1000, hideMyText, 1 ) end end -- Display object to press to show text local myObject = display.newImage( "inventory_button.png", display.contentWidth/2, display.contentHeight/2) myObject:addEventListener("touch", showTextListener) Question 2 - Also why is it the case that if I add a line BEFORE "myText = ..." of: a) "if myText then myText:removeSelf() end" = THIS FIXES THINGS, whereas b) "if myText then myText=nil end" = DOES NOT FIX THINGS Interested in hearing how Lua works here re the answer...

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  • Unable to use TL-WN821N

    - by udiw
    Hi, I got a TP-LINK USB wireless module - TL-WN821N, using Ubuntu 10.4 (same problems were also seen in 10.10). From everything I've read online, the usb should work just fine, since the Atheros ar9170 is built into the kernel. However, when I plug it in, it is detected as a USB device, but there is no wlan associated with it, and basically - nothing happens. Am I doing something wrong? what should I do so that the Atheros driver is associated with this device? btw, on Windows it works fine (with the drivers). Some logs: $ uname -mr 2.6.32-28-generic i686 $ lsb_release -d Description: Ubuntu 10.04.2 LTS $ lsusb ... (trimmed) Bus 002 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub Bus 001 Device 017: ID 0cf3:7015 Atheros Communications, Inc. Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub $ lsmod |grep ar9 ar9170usb 51296 0 ath 7611 1 ar9170usb mac80211 205402 3 ar9170usb,iwl3945,iwlcore cfg80211 126528 5 ar9170usb,ath,iwl3945,iwlcore,mac80211 led_class 2864 4 ar9170usb,iwl3945,iwlcore,sdhci

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  • How do I install Gyachi on PPC Ubuntu 12.04.1?

    - by Sergiu
    So I'm trying to install Gyachi on my iMac G5 runnig Ubuntu 12.04.1 but I can't seem to find a package that works on powerpc interface. I did find some powerpc enterprise Linux.rpm builds on the internet but I have no idea how to install them. This is the lin: http://rpmfind.net/linux/RPM/epel/5/ppc/gyachi-1.1.71-5.el5.ppc.html Does anyone know how to install that, or would it work? Is there any Skype alternative that has both audio and video for Ubuntu? In my knowledge, Gyachi is the only one that at least does both audio and video for Yahoo.

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  • Uninstalling Ubuntu dual-boot bootrec issues

    - by Raymond Standen
    So on my laptop I am currently planning on uninstalling Ubuntu 12.04 so I can upgrade my Windows 7 partition to Windows 8, then install Ubuntu 12.10. My issue being that when I boot the Windows 7 recovery disk, I believe i Need to use cmd to run bootrec /fixboot and bootrec /fixmbr. Now, whilst fixmbr works, fixboot yields me with an error regarding an unrecognised volume. When I turn on my PC now, I am no longer met the GRUB option, so I boot straight into Windows. My question is: As such, do I still need to have fixboot run or can I just format and resize the partitions now even with the error when running fixboot?

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  • Changing default application

    - by ragebunny
    Hey i have recently installed Sublime text 2 and i must say it's one of the best text editors i've ever used or even seen in use. So i managed to install everything and added to the unity menu and also change all the entries of gedit.desktop to sublime.desktop and it works just fine for most files but i realised that some files still open in gedit, for example php files, i checked the default list for php but there isn't anything in there. So how would i set the default for opening php files? Update:Also Sublime doesn't show up in them properties menu where i can usually select the default program. Thanks for the help. I'm using 12.10.

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  • Unity Player Controls Streaming Music Services From Chrome Toolbar

    - by Jason Fitzpatrick
    Chrome: If you’re a frequent Pandora, Grooveshark, or other popular streaming music station listener, Unity Player puts play control and song info on the Chrome Toolbar. Rather than sending you digging through your tabs to find the window with Pandora–or Google Music, Grooveshark, 8Tracks, Hypemachine, or any of the other dozen supported services–Unity Player pulls up a one-click control panel for easy pause/play, skip, and access to other service features like thumbs up/down flagging. Unity Player is free, works wherever Chrome does. Unity Player [via Addictive Tips] Make Your Own Windows 8 Start Button with Zero Memory Usage Reader Request: How To Repair Blurry Photos HTG Explains: What Can You Find in an Email Header?

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  • More about JuJu cache

    - by koxon
    I would like to know more about JuJu cache. After I start a charm and JuJu provisions a machine for the first time, the charm will be downloaded and all dependencies installed (apt-get, etc). This process can be very long. Once the charm has been build, configured and deployed once, can JuJu provision more instances of the same charm pre-built and configured? I presume that's what the cache is for, but the documentation is not very explicit: https://juju.ubuntu.com/docs/charms-deploying.html How JuJu tracks the state of the charm if it works that way? Thanks Nic

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  • How can I link to callback functions in Lua such that the callbacks will be updated when the scripts are reloaded?

    - by Raptormeat
    I'm implementing Lua scripting in my game using LuaBind, and one of the things I'm not clear on is the logistics of reloading the scripts live ingame. Currently, using the LuaBind C++ class luabind::object, I save references to Lua callbacks directly in the classes that use them. Then I can use luabind::call_function using that object in order to call the Lua code from the C++ code. I haven't tested this yet, but my assumption is that if I reload the scripts, then all the functions will be redefined, BUT the references to the OLD functions will still exist in the form of the luabind::object held by the C++ code. I would like to be able to swap out the old for the new without manually having to manage this for every script hook in the game. How best to change this so the process works? My first thought is to not save a reference to the function directly, but maybe save the function name instead, and grab the function by name every time we want to call it. I'm looking for better ideas!

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  • Configuration of the network manager via DBus: how to set the ad hoc mode

    - by Andrea
    I have an hard nut to crack: a nice bottle of italian Chianti wine to the solver! :) To automatically configure Wifi, I first have to kill the network manager and than activate the wifi via the commandline: I do this all automatically in my application and works great. However... it is not the right way to do this. As the user has no network gui anymore to configure some other network access. A much better and transparent way would be to configure wifi directly via network manager over the DBus interface. I was able to configure it, but I wasn't able to set it to ad hoc mode... Searching the web for a while: a lot about configuration in general but nothing related to ad hoc mode. I think the only way to do figure that out is to look into the source code of the network manager...maybe someone already did it and he can answer.

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  • Pointing domain away from google

    - by redbeard
    I've already asked this question on google apps support, didnt fet an answer yet, and I am in a bit of a hurry. Need to have that website up by monday. Question: We have a domain registered at 101domain, we used a domain just for google apps, for email, and some services, and domain was never used for website. Now we pointed domain to the local hosting service, set everything like it should be, and pointed back to google from hosting service for gmail and gmail works perfectly. Problem is that we tried to set up a website at hosting service but domain still points to google apps login. Everything looks like it should, we recently bought 2 more domains that are set up the same (we use google apps on them too), the only difference tha I can think of is that we didn't use for apps first. Could this be because CNAME lags behind DNS server change?

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  • Execure a random command from .txt file?

    - by Alberto Burgos
    I have a Ubuntu server, and I'm trying to print a Twitter quote using the app "twidge". So I made a list of tweets on a .txt file. I want to print one tweet (per line) from that file and send it to Twitter via twidge (or what ever other method was possible). I can print a random phrase with shuf: shuf -n 1 /var/www/tweets.txt and it works. It sends me back one of the tweets, but, it does not send it to Twitter, even if the "in line" phrase is a command. i.e: twidge update "bla bla bla" It just prints on the screen, but don't send it to Twitter. I tried turning the .txt to .sh, but don't work... any idea? by the way, i want to use it with crontab, something like this: 15 * * * * shuf -n 1 /var/www/tweets.txt

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  • Super-quick MIDI generator with nonrestrictive license?

    - by Ricket
    I'm working on my Ludum Dare entry and trying to figure out how in the world I'm ever going to get background music. I found WolframTones, but the license is too restrictive: Unless otherwise specified, this Site and content presented on this Site are for your personal and noncommercial use. You may not modify, copy, distribute, transmit, display, perform, reproduce, publish, license, create derivative works from, transfer, or sell any information or content obtained from this Site. For commercial and other uses, contact us. But I really like the interface! It's a lot like sfxr - click a genre and download a song. That's so cool. Is there another program that does this same sort of thing but without a restrictive license, so that I can generate a bgm and use it in my game?

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  • Comprehensive redesigns

    - by Chris Skardon
    So, last night I realised that I’d made some bad decisions with the database, structure and naming, so… I’ve now refactored it all, and I’m feeling… hmmm… meh about it. I suspect I will redo it all later, but for now it will do…. I’ve also come to the conclusion that I was maybe trying too much for the initial release, so as a consequence I have removed one part of the project… (which, by-the-by, I intend to have published in a month or so – and yes Andy, that is one month longer than I mentioned to you in that email :)) @Html.DisplayFor() I find myself using DisplayFor a lot at the moment, is this correct? I mean – it works, but is that really only for forms? Do I need to use it? Should I use it?

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  • Intel Atom D425 Problems

    - by Nico
    I have recently bought an Intel Atom D425 mini itx board with OCZ 30 Gig SSD and 1 Gig DDR3 ram. I have installed Ubuntu 10.04 and Crunchbang Statler ok; works fine in both. I tried to install Xubuntu 12.04, Ubuntu 12.04, and Mint 13 Mate. All of those 3 start up, but as soon as you get to install it all goes wrong and the monitor says input not supported. Is it an Intel Atom D425 problem, an Ubuntu problem, or something else? All help would be much appreciated Regards Nico

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  • Best gui toolkit to use for creating 3D board game

    - by UserInteractive
    I have created a board game using Java and Swing - using GridLayout and various other apis. It works properly but the UI looks very very simple. I would want couple of animations like tilting the GridLayoutat any angle. There are pawns on boxes of the GridLayout that I want to be animated when somebody clicks on it. I'm not sure of the right GUI toolkit to use for this. Swing repaint is possible to a limit and cannot be used for a lot of animation and graphics. And I realized after creating the game that Swing is probably not a good tool to create games. Could anybody suggest a better framework to use that I can use it in Eclipse with Java? I was thinking of JavaFX or tools like Adobe Flash or Adobe Air. Any suggestions please?

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  • What is the best way to implement collision detection using Bullet physics engine and a track generated from a curve?

    - by tigrou
    I am developing a small racing game were the track is generated from a curve. As said above, the track is generated, but not infinite. The track of one level could fit with no problem in memory and will contain a reasonably small amount of triangles. For collisions, I would like to use Bullet physics engine and know what is the best way to handle collisions with the track efficiently. NOTE : The track will be stored as a static rigid body (mass = 0). The player will be represented by a sphere shape for collisions. Here is some possibilities i have in mind : Create one rigid body, then, put all triangles of the track (except non collidable stuff) into it. Result : 1 body with many triangles (eg : 30000 triangles) Split the track into several sections (eg: 10 sections). Then, for each section, create a rigid body and put corresponding triangles in it. Result : small amount of bodies with relatively small amount of triangles (eg : 1500 triangles per section). Split the track into many sub-sections (eg : 1200 sections). Here one subsection = very small step when generating the curve. Again for each sub-section, create a body and put triangles in it. Result : many bodies with very small amount of triangles (eg : 20 triangles). Advantage : it could be possible to "extra data" to each of the subsection, that could be used when handling collisions. Same as 2, but only put sections N and N+1 in physics engine (where N = current section where the player is). When player reach section N+1, unload section N and load section N+2 and so on... Issue : harder to implement, problems if the player suddenly "jump" from one section to another (eg : player fly away from section N, and fall on section N + 4 that was underneath : no collision handled, player will fall into void ) Same as 4, but with many sub-sections. Issues : since subsections are very small there will be constantly new bodies added and removed to physics engine at runtime. Possibilities for player to accidently skip some sections and fall into the void are higher than 4.

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  • How to handle loading and keeping many bitmaps in an Android 2D game

    - by Lumis
    In an Android 2D game which is using SurfaceView where its onDraw is driven by a loop from a Thread, I use many bitmap sprites (sprite sheets) and two background size bitmaps, which are all loaded into memory at the start. It all works fine, however, when the activity is onPause or after reloading it few times, Android shows a tendency to wipe out the big bitmaps only, probably to free memory. Sometimes this happens even in the middle of loading this very activity. In order to counter this, I made a check in the onDraw method to test if the big bitmaps are still there and reload them if they are forcefully recycled by Android, before drawing them on Canvas. This solution may not be the most stable, and since I know that there are much more accomplished android game programmers here than myself, I hope you can reveal some tricks or secrets or at least provide some good hints, how to overcome this.

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  • How Byte loading/storing is implemented By the CPU?

    - by AlexDan
    I know that in 32bit machine, cpu read from memory 32bits at a time. since the registers in this case is 32bit in size too, I can understand how this works. What I don't understand is how the cpu implement load instructions of 1 byte. does it load the whole word where the single byte is located to the register, then perform some kind of "byte shifting", or does the cpu can load a single byte, in this case when does the byte masking happen, is it until the byte got loaded in the register, or it happen when byte is send through the data bus ? P.S. The cpu Im using is MIPS, the instructions Im talking about are: lb or lbu

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