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  • Check validity Partition in python

    - by fadhil
    I have a question, I really don't understand about partition of set. There are 3 definition that we have to know, and I don't know how to implement the definition into python language. In my case, I have a set of RegionsCode which is set(['Sub-Saharan Africa', 'East Asia & Pacific\n', 'Region\n', 'Middle East & North Africa\n', 'North America\n', 'Latin America & Caribbean\n', 'South Asia\n', 'Sub-Saharan Africa\n', 'Europe & Central Asia\n']) And the question is: Determine if RegionCodes is a valid partition of ?????????????????????? n ??????????????????. There are three steps to showing that a partition is valid, all three steps need to be included here. Output the result of each step to the terminal. I would really appreciate if there is someone helps me.. thank you

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  • Wifi very slow on Ubuntu 12.04 but not on Win7, need help

    - by user84504
    I have an enormous problem: I've a Sony Vaio VGN-NR21S with win7 and Ubuntu 12.04 in dual boot. With Windows everything is fine (except that is windows) but with Ubuntu the wireless connection is awfully slow, basically unusable. I've already search for similar discussion but the solution proposed didn't worked. I've noticed this issue also in live mode both with ubuntu and linux mint. I've installed Ubuntu onto an Acer that shows the same problem when connected via wifi to my router, so I think that maybe the issue is about compatibility with my home router. I really need help, I don't want unistall ubuntu! Please tell me which output u need to help me, thanks.

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  • cannot connect to wireless network on ubuntu 12.04

    - by angjinhang
    i have installed ubuntu on my 6-year-old Acer Aspire 4310 and i love it's lightning speed.but, now i have a big problem, that is it cannot connect to any wireless network. the wireless network worked well in my windows. the wireless switch is not responding to me(i guess it only works on windows). there are also no wireless toggle switch on my keyboard. i have installed my driver, yeah, a proprietary driver. i installed it, and my i never see my wireless network anymore, even the enabling and disabling button in the system settings. i can connect my wireless network during the ubuntu installation. so what's the problem? i cannot find wlan0 in the ifconfig output. i can still see the enable and disable button in the system settings before i install the driver. now even i remove the driver, i will no longer display. i wanted my wifi back, help!

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  • I can't get a native resolution of 1920x1080 on 11.10 (AOC f22 on a Nvidia Geforce GTS 450)

    - by Mikeeeee
    I have a problem were the highest resolution I can get is 1360x769, this is a 22 inch LCD monitor with a native resolution of 1920x1080_60 I have tried numerous drivers but nothing changed I tried editing the xorg.conf scipt with no success (I am a noob with linux though). Running many commands in terminal witch I got from people with similar problems only gives me errors like "Failed to get size of gamma for output default. I get edid checksum is invalid error on boot down also. I think there maybe a communication problem between my screens EDID and ubuntu although xp and windows 7 detect my screen without any errors and automatically set native resolution. also when I am installing ubuntu I get a horrible screen flashing every few seconds until I have installed the nvidia driver. pc specks if it helps x64 os, mainboard N68PV-GS, 4 gig ram, AMD Phenom(tm) 9350e Quad-Core Processor × 4, Nvidia Geforce gts450 512mb, hard drives set up in a onboard nvidia raid array striped. realy need to get a better resolution, 1360x769 does not look nice on a 22 inch screen. ty

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  • Can all code be represented as a series of Map / Filter / Reduce operations?

    - by Mongus Pong
    I have recently been refactoring large chunks of code and replacing them with Linq queries. Removing the language bias - Linq is essentially a set of Map / Filter and Reduce operations that operate on a sequence of data. This got me thinking, how far would I theoretically be able to take this. Would I be able to rewrite the whole code base into a series (or even a single) of Map / Filter and Reduce operations. Unfortunately I get paid to do useful stuff, so I haven't been able to experiment much further, but I can't think of any code structure that couldn't be re structured as such. Side effected code can be dealt with via monads.. Even output is essentially mapping memory addresses to screen addresses. Is there anything that couldn't be (theoretically) rewritten as a Linq query?

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  • Thread count in Java game

    - by Taylor Hill
    I'm just curious as to what a reasonable number of threads is for a simple 2D mmo in Java. Is it reasonable to have two threads per connection, one for the input stream and one for the output stream? The reason I ask is because I use a blocking method on the input stream, and a workaround seems unnecessarily complex if I were to try to get around it without adding threads. This is mostly for my own edification; I don't expect to have 5 million people playing it ever, or even 5, but I'm wondering what a good scalable solution is, and if this is reasonable for a small server (<30 connections).

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  • Do unused vertices in a 3D object affect performance?

    - by Gajet
    For my game I need to generate a mesh dynamically. Now I'm wondering does it have a noticeable affect in FPS if I allocate more vertices than what I'm actually using or not? and does it matter if I'm using DirectX or OpenGL? Edit Final output will be a w*h cell grid, but for technical issues it's much easier for me to allocate (w+1)*(h+1) vertices. Sure I'll only use w*h vertices in indexing, and I know there is some memory wasting there, but I want to know if it also affect FPS or not? (Note that mesh is only generated once in each time you play the game)

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  • Writing Ubuntu shell scripts

    - by Lukesh
    Write a script that will shut down one of your server called “appsserver” every night in order to preserve power. But before the appsserver is brought down, your script should do the following: Check if there are any users logged into the appsserver Check the size of the directory /usr/tmp is bigger than 1G and delete all its content. If (a) is true, send a broadcast message to all user that the machine will shut down in 20 minutes and that they should log out of the appsserver All the output of the commands in your script should be sent to a log file with the script running date appended to the log file itself (e.g. shutdown_14_Nov_2011.log).

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  • How to determine the size of a package in terminal prior to downloading?

    - by user14590
    When using apt-get install <package_name>, and there are dependencies that need to be downloaded, the terminal outputs names of additional packages and total size, and asks for confirmation before downloading. But, when dependencies are satisfied and nothing but the named package needs to be downloaded there is no size output and no confirmation. When using Synaptic, I can see the total size that new packages that will use after installation but no way to see the size that needs to be downloaded, except to go from package to package and use properties to see the compressed size. I would like to know if there is a way to see the size of a package(s) in terminal and Synaptic prior to downloading and installing it/them?

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  • Bluetooth no longer working?

    - by user68733
    I am using a Toshiba Portege A600 and have been using Ubuntu for about a year now. When I first installed Ubuntu "10.10", everything worked fine, including bluetooth. I was able to send and receive files. After upgrading to 11.04 and then to 11.10, bluetooth functionality decreased. I was able to view bluetooth devices, but not be able to pair or connect to them. Now, on 12.04, bluetooth is no longer recognised at all. When I open up the Bluetooth settings application, it says "No Bluetooth Adapters found". What is the cause of this, and how can I fix it. I have included the output of sudo lshw. http://pastebin.com/09w0vkfu Thanks!

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  • juju: How do I list all the relation variables and debug them interactively?

    - by mfisch
    I'm writing a charm that requires a mysql database, I found from looking at other charms that this (below) is how I get the info about the database: user=`relation-get user` password=`relation-get password` mysqlhost=`relation-get private-address` But I just found that from reading the wordpress charm example, is there a way to show all the relation variables that I can use? Also, while debugging my db-relation-changed script, I wanted to ssh into my host and interactively run those commands, for example relation-get user, but it didn't work. I resorted to having to restart everything and use juju log to print them out. This wasted a lot of time. Is there a way to print out these relations, either from my dev box or from the instance running my charm? (Below is what happens when I tried to interactively run relation-get): ubuntu@mfisch-local-tracks-0:~$ relation-get user usage: relation-get [-h] [-o OUTPUT] [-s SOCKET] [--client-id CLIENT_ID] [--format FORMAT] [--log-file FILE] [--log-level CRITICAL|DEBUG|INFO|ERROR|WARNING] [-r RELATION ID] [settings_name] [unit_name] No JUJU_AGENT_SOCKET/-s option found

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  • List all versions of a package

    - by askb
    Is there a equivalent of this command; yum list kernel-headers --showduplicates on Ubuntu with apt-get, apt-cache etc. The above command lists various versions of the kernel-headers rpm available on F20/RHEL or installations. Closet I can get using apt-cache showpkg, not sure if there is a better way ? $ apt-cache showpkg linux-image Package: linux-image Versions: Reverse Depends: firmware-crystalhd,linux-image systemtap,linux-image fiaif,linux-image Dependencies: Provides: Reverse Provides: linux-image-3.13.0-27-lowlatency 3.13.0-27.50 linux-image-3.13.0-27-generic 3.13.0-27.50 linux-image-3.13.0-24-lowlatency 3.13.0-24.47 linux-image-3.13.0-24-generic 3.13.0-24.47 linux-image-3.13.0-24-lowlatency 3.13.0-24.46 linux-image-3.13.0-24-generic 3.13.0-24.46 Expecting similar output: $ yum list kernel-headers --showduplicates Loaded plugins: langpacks, refresh-packagekit Installed Packages kernel-headers.x86_64 3.11.10-301.fc20 @fedora Available Packages kernel-headers.x86_64 3.11.10-301.fc20 fedora kernel-headers.x86_64 3.14.4-200.fc20 updates This would help me simply do a downgrade or upgrade to a specific version.

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  • Partition showing up twice under devices

    - by JohnReed
    I have an ntfs data partition on the same drive as my ubuntu 12.04 partition. I wanted to have this partition automatically mount at startup so that dropbox can start syncing at startup without me having to manually mount it (my dropbox folder is on the partition). I edited the fstab file by appending the following to it: #Data-Partition UUID=762639DE416D0A21 /media/Data ntfs-3g rw,auto,users,exec,nls=utf8,umask=003,gid=46,uid=1000 0 2 The drive now automounts at startup like I wanted, but now I have a duplicate Data entry under my Devices list. This only appeared after editing the fstab file. The second Data entry under Devices does not mount properly and I do not want it there. Why is this duplicate entry there and how can I get rid of it? additional information: Here is the output I get from cat /proc/partitions: major minor #blocks name 8 0 976762584 sda 8 1 102400 sda1 8 2 111574016 sda2 8 3 803643392 sda3 8 4 1 sda4 8 5 55410688 sda5 8 6 6028288 sda6 11 0 1048575 sr0

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  • ASUS Xonar DG not working Ubuntu

    - by thephpdev
    I've checked the "Questions that may already have your answer" to no avail. Basically, there is no sound at all, the snd_oxygen drivers are all being loaded. I can see the sound card and all of it's separate ports in Settings-Sound-Output, but nothing is coming out. I tried adjusting the volume in alsamixer, but for some reason the volume won't change (all that is there are some options [Speakers, Headphones, FP Headphones] and they change when I press the up/down arrow keys) at all. I have also tried many other terminal commands, such as reloading alsa and checking if the sound card is even being detected, which it is. I'm left clueless. It says on a bug report that this has been unassigned for over a year. Surely that's not right. Thanks in advance, Caelan.

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  • Learning the nuances of a language (C++)

    - by prelic
    So I'm a recent college graduate, and I really enjoy working in C++; I worked with it a lot in school, and would like to pursue a career writing in C or C++. The problem I'm having is that I'm trying to learn the nuances of C++. I'm not talking about the basics, or even advanced concepts like templates, namespaces, etc...I'm talking about the real nitty-gritty stuff like undefined behavior and stuff like that. When I'm interviewing, and they put a bizarre piece of C++ code in front of me, and ask me what the output will be, I want to be able to nail those questions. Obviously experience is a great way to learn, but when I write code for practice, I [obviously] know what it does. Reading open-source projects have been good practice, but I find that there tends to be an enormous learning curve just understanding the organization of the code (because the projects tend to be large). So basically what I'm asking is, what should I do now? Any tips are greatly appreciated!

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  • Ubuntu 12.10 Sound resumes after I suspend and resume.[ACER 4830 TG]

    - by user70716
    I installed the 12.10 yesterday and like 12.04 there was no sound, I have an ACER 4830 TG. I noticed that the HDMI output is working fine , But Speaker or Headphone isnt working. So i did the following: sudo add-apt-repository ppa:ubuntu-audio-dev sudo apt-get update sudo apt-get dist-upgrade And still couldn't get the sound . Then i found the temp fix for this issue. The temp fix is to Suspend the machine completely and resume. However after restart the same thing happens. Is there a solution to this issue?

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  • What do the various dpkg flags like 'ii' 'rc' mean?

    - by theTuxRacer
    I frequently need to check which packages are installed, and I use the following command: dpkg -l | grep foo which gives the following output Desired=Unknown/Install/Remove/Purge/Hold | Status=Not/Inst/Cfg-files/Unpacked/Failed-cfg/Half-inst/trig-aWait/Trig-pend |/ Err?=(none)/Reinst-required (Status,Err: uppercase=bad) ||/ Name Version Description ii foo <version> <description> What does the ii mean? What other flags are there? How to read the flags? (because the explanation is quite complicated, IMO) Thanks.

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  • Why does service service_name status give different responses for different services?

    - by Code Ghar
    Running the "service service_name status" command gives three different types of output when three different service_names are used. I tried with atftpd, apache2, and isc-dhcp-server, as shown below. user@host:~$ service atftpd status Usage: /etc/init.d/atftpd {start|stop|restart|reload|force-reload} user@host:~$ service apache2 status Apache2 is running (pid 1103). user@host:~$ service isc-dhcp-server status isc-dhcp-server start/running, process 5696 Could this be because atftpd has not been converted to Upstart? The status for isc-dhcp-server shows "start/running" which indicates it has been converted to use Upstart. I would've thought apache2 would have been converted to Upstart already. If it has then why does it not display "start/running"?

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  • Human powered document processing

    - by Denivic
    I want to create a "Human powered document processing" website in a formed as a gaming mechanic that will prompt volunteers to weed out text missed by OCR (optical character reader) The challenge is that the OCR output often contains errors and omissions, which hampers searches. Manual corrections is needed to weed out these mistakes, so that the text become machine readable.. I want to accomplish these task by splitting dull repetitive task into tiny microtasks and distributing then to register contributors on my site. I want to digitalized pedigree books into an online database. I want to recreate recaptcha and http://www.digitalkoot.fi/en/splash all roll into one.. Help!!!! What programing languages is best needed to create a recapctch type website and is there any open source project similar to this I can use? I need a some directions to begin this project, so all and any help will be great.

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  • reading k&r(c book) and confusing 1st chapter code [closed]

    - by DarkEnergy
    #include <stdio.h> /* copy input to output; 2nd version*/ main() { int c; while ((c = getchar()) != EOF) putchar(c); } this is very confusing... since you never escape the while loop. I've learned that EOF is -1. i type -1 but it just reprints it. It's a never ending loop. Over time did the library get changed and differs from what the book intended it to be? when i say library i mean the putchar()/getchar() that's in the library... sorry.

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  • 12.10 sound resumes only after Suspend

    - by user70716
    I installed the 12.10 yesterday and like 12.04 there was no sound, I have an ACER 4830 TG. I noticed that the HDMI output is working fine, but Speaker or Headphone isn't working. So I did the following: sudo add-apt-repository ppa:ubuntu-audio-dev sudo apt-get update sudo apt-get dist-upgrade and still couldn't get the sound. Then I found the temp fix for this issue which is to Suspend the machine completely and resume. However, after restart the same thing happens. Is there a solution to this issue?

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  • How do I set a custom resolution in 12.04 with a nVidia video card (9600 GSO)?

    - by Aaron Agarunov
    I have 32 bit 12.04 and my video card drivers are up to date at "304.64" yet my resolution appears capped at 1920x1080. I am trying to get the resolution to 2560x1440 or even higher, as I am running this machine on a 42" LCD through HDMI and the 1920x1080 resolution will not stretch to fit the screen and is therefore fairly zoomed in. The 9600 GSO supports up to 2560x1600, so this should be no problem for the card itself. I have tried using xrandr, which successfully creates the 2560x1440 60 hertz mode but does not allow me to --addmode or --output it in. I have tried working with the xorg.conf, but I actually can not find a way to create the file since when I try to, I am given an error message stating that the # of monitors I have does not match the # of screens I have. Can anyone provide some help or insight?

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  • OKI-B2540 printer doesn't print?

    - by NCLI
    There is a driver for the OKI-B2520, and it is automatically selected when the printer is connected. From looking at various websites, it seems like the B2500, B2520, and B2540 all work perfectly fine with the OKI-B2520 driver, so I let it install that. Everything went smoothly, the printer shows up as available, and I can queue jobs without any problems, and they disappear after a few seconds. However, nothing actually comes out. There is no error message on the printer display, or from Ubuntu. This is the output from the CUPS error log: http://pastebin.com/S6ifZAup So my question is: What is wrong??

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  • Structuring an input file

    - by Ricardo
    I am in the process of structuring a small program to perform some hydraulic analysis of pipe flow. As I am envisioning this, the program will read an input file, store the input parameters in a suitable way, operate on them and finally output results. I am struggling with how to structure the input file in a sane way; that is, in a way that a human can write it easily and a machine can parse it easily. A sample input file made available to me for a similar program is just a stream of comma-separated numbers that don't make much sense on their own, so that's the scenario I am trying to avoid. Though I am giving the details of my particular problem, I am more interested in general input-file structuring strategies. Is a stream of comma-separated values my best bet? Would I be better off using some sort of key:value structure? I don't know much about this, so any help will probably put me in a better track than I am now.

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  • ALSA Mutes Incorrect Audio Device on Headphone Event

    - by Gardiner
    I know what the problem is, I just don't know how to prevent it. When I plug in my headphones, ALSA automatically mutes (and sets the volume to 0) the 'Speaker' entry in alsamixer. If I go in and manually unmute (and turn the volume up) I have sound from my headphones. Question is, how do I change this behavior? I want it to adjust the volume to half, but not mute or set the volume to 0. I'm using Ubuntu Gnome 13.04 Output of amixer scontents Simple mixer control 'IEC958',0 Capabilities: pswitch pswitch-joined penum Playback channels: Mono Mono: Playback [on] This answer solved my issue: How can I get sound on headphones without switching back to 'Speakers' manually?

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