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  • Should I use multiple threads in this situation? [Ruby]

    - by mr popo
    I'm opening multiple files and processing them, one line at a time. The files contain tokens separating the data, such that sometimes the processing of one file may have to wait for others to catch up to that same token. I was doing this initially with only one thread and an array indicating with true/false if the file should be read in the current iteration or if it should wait for some of the others to catch up. Would using threads make this simpler? More efficient? Does Ruby have a mechanism for this?

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  • How to get exactly typeof is object/array/null..?

    - by 3gwebtrain
    var obj = {},ar = [],nothing=null,empty=undefined,word ='string',headorTail = true; console.log(typeof obj) //object console.log(typeof ar)//object console.log(typeof nothing)//object console.log(typeof empty)//undefined console.log(typeof word)//string console.log(typeof headorTail)//boolean But how can i get the type of obj,ar,nothing as "object, array,null" - what is the best way to achieve this?

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  • How to prevent screen locking when lid is closed?

    - by Joe Casadonte
    I have Ubuntu 11.10 with Gnome 3 (no Unity), gnome-screen-saver has been removed and replaced with xscreensaver. The screensaver stuff all works fine -- no complaints there. When I close my laptop lid, even for a second, the screen locks (and the dialog box asking for my password is xscreensaver's). I'd like for this not to happen... Things I've tried/looked at already: xscreensaver settings - the "Lock Screen After" checkbox is not checked (though I've also tried it checked and set to 720 minutes) gconf-editor - apps -> gnome-screensaver -> lock_enabled is not checked System Settings - Power - "When the lid is closed" is set to "Do nothing" for both battery and A/C System Settings - Screen - Lock is "off" gconf-editor - apps -> gnome-power-manager -> buttons -> lid_ac && lid_battery are both set to "nothing" dconf-editor - apps -> org -> gnome -> desktop -> screensaver -> lock_enabled is not checked Output from: gsettings list-recursively org.gnome.settings-daemon.plugins.power: org.gnome.settings-daemon.plugins.power active true org.gnome.settings-daemon.plugins.power button-hibernate 'hibernate' org.gnome.settings-daemon.plugins.power button-power 'suspend' org.gnome.settings-daemon.plugins.power button-sleep 'suspend' org.gnome.settings-daemon.plugins.power button-suspend 'suspend' org.gnome.settings-daemon.plugins.power critical-battery-action 'hibernate' org.gnome.settings-daemon.plugins.power idle-brightness 30 org.gnome.settings-daemon.plugins.power idle-dim-ac false org.gnome.settings-daemon.plugins.power idle-dim-battery true org.gnome.settings-daemon.plugins.power idle-dim-time 10 org.gnome.settings-daemon.plugins.power lid-close-ac-action 'nothing' org.gnome.settings-daemon.plugins.power lid-close-battery-action 'nothing' org.gnome.settings-daemon.plugins.power notify-perhaps-recall true org.gnome.settings-daemon.plugins.power percentage-action 2 org.gnome.settings-daemon.plugins.power percentage-critical 3 org.gnome.settings-daemon.plugins.power percentage-low 10 org.gnome.settings-daemon.plugins.power priority 1 org.gnome.settings-daemon.plugins.power sleep-display-ac 600 org.gnome.settings-daemon.plugins.power sleep-display-battery 600 org.gnome.settings-daemon.plugins.power sleep-inactive-ac false org.gnome.settings-daemon.plugins.power sleep-inactive-ac-timeout 0 org.gnome.settings-daemon.plugins.power sleep-inactive-ac-type 'suspend' org.gnome.settings-daemon.plugins.power sleep-inactive-battery true org.gnome.settings-daemon.plugins.power sleep-inactive-battery-timeout 0 org.gnome.settings-daemon.plugins.power sleep-inactive-battery-type 'suspend' org.gnome.settings-daemon.plugins.power time-action 120 org.gnome.settings-daemon.plugins.power time-critical 300 org.gnome.settings-daemon.plugins.power time-low 1200 org.gnome.settings-daemon.plugins.power use-time-for-policy true gnome-settings-daemon is running: <~> $ ps -ef | grep gnome-settings-daemon 1000 1719 1645 0 19:37 ? 00:00:01 /usr/lib/gnome-settings-daemon/gnome-settings-daemon 1000 1726 1 0 19:37 ? 00:00:00 /usr/lib/gnome-settings-daemon/gsd-printer 1000 1774 1645 0 19:37 ? 00:00:00 /usr/lib/gnome-settings-daemon/gnome-fallback-mount-helper Anything else I can check? Thanks!

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  • Install of AppFabric RC stops AppFabric Monitoring (some traps for young players)

    - by Rob Addis
    I uninstalled AppFabric Beta 2 and installed AppFabric RC. The AppFabricEventCollection Service is started (runs under Local Service which is a dbo_owner on the Monitoring Database to prove this wasn’t the issue). The SQLServerAgent Service is started. Nothing is being written to the Monitoring DB Staging Table and thus nothing is being written to the Event tables or seen in the AppFabric Dashboard. Nothing has been written to the following event logs     - Microsoft-Windows-Application Server-System Services\Admin     - Microsoft-Windows-Application Server-System Services\Operational The Microsoft-Windows-Application Server-System Services\Debug event log is not shown in the event viewer. The WCF configuration appears fine the connection string to the Monitoring DB is correct. Monitoring is set to “Trouble Shooting” and no errors are shown on the “Configure WCF and WF for Application” dialog. So the problem seems to lie with either AppFabric which writes to the event log or the AppFabricEventCollection Service. I thought I was flummoxed... However one of my colleagues said have you checked the etwProviderId? I was using a config which was created under AppFabric  Beta 2 which had a different etwProviderId. So I deleted the following section and all other references to AppFabric monitoring from the web.config and then recreated them using IIS the “Configure WCF and WF for Application” dialog and set the level to TroubleShooting.         <diagnostics etwProviderId="6b44a7ff-9db4-4723-b8cf-1b584bf1591b">             <endToEndTracing propagateActivity="true" messageFlowTracing="true" />         </diagnostics>   I then called a service to create some log entries. Still nothing was written to the Monitoring DB Staging Table... I checked the Microsoft-Windows-Application Server-System Services\Admin event log. It had the following entry... Configuration error. Please see the details to correct the problem. \rDetailed information:\r Filename: \\?\C:\Users\xxx\Documents\dotnetdev\Frameworks\SOA\xxx.SOA.Framework\xxx.SOA.Framework.MockServices\SimpleServiceParent\web.config Error: Cannot read configuration file due to insufficient permissions    System.UnauthorizedAccessException: Filename: \\?\C:\Users\xxx\Documents\dotnetdev\Frameworks\SOA\xxx.SOA.Framework\IAG.SOA.Framework.MockServices\SimpleServiceParent\web.config Error: Cannot read configuration file due to insufficient permissions   And guess who the user was... Local Service yes yes I should have used a better User in the AppFabric RC setup to run the AppFabricEventCollection Service under! So I changed the user to a more appropriate one and removed Local Service as a DBO and hay presto!

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  • Dell XPS L502Xnot detecting monitor-TV

    - by Guilherme Z. Santos
    I'm running Ubuntu 12.04 LTS on a Dell XPS L502X and when I connect the HDMI cable from the TV to the computer Ubuntu detects nothing at all, It works perfectly fine in Windows 7 though. I've already went to the Display control, plugged and unplugged the TV, clicked the Detect Displays button, and nothing. Do I have to activate the HDMI output or something? Because I used another computer with a VGA output and it worked perfectly.

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  • What are programmers made to do in spare time in jobs?

    - by Shashank Jain
    Well, with no prior job experience I am completely ignorant of how things happen at software companies. I want to know what programmers are made to do when there is nothing to do? Lets consider Facebook or twitter. Now it is quite improbable that Facebook people have something or other feature in mind to be implemented. So software developers are quite expected to have some time when there is nothing to do. Are they free to do anything in this?

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  • Learning PostgreSql: First Steps

    - by Alexander Kuznetsov
    In this series of blog posts we shall migrate some functionality from SQL Server to PostgreSql 9.2. The emphasis of these blog posts will be on what PostgreSql does differently from Sql Server - I assume that the reader has considerable knowledge of Sql Server, but might know nothing of PostgreSql. Also we shall concentrate on development, not administration. In a true agile fashion, we shall learn only what we need to get this particular job done, and nothing else, but we shall strive to learn it...(read more)

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  • Are IE 9 will have a place in heart of user ?

    - by anirudha
    in a advertisement of IE 9 MSFT compare two product first is their IE9 and second is chrome 6. I know 6 is not currently [9] but no objection because may be they make ads when 6 is currently version and have RC or beta in their hands. on IE 9 test-drive website they show many of people ads to show the user that IE9 is performance better or other chrome or Firefox not. well they not compare with Firefox because last days firefox not still in news and search trends like before RC release many of user googling for them. Well I myself found IE9 perform smoother then chrome. but what MSFT do after IE9 nothing they waiting for IE 10 not for give updates not as well as Google chrome and Firefox. Are IE9 have anything new for Developer even a small or big. well they tell you blah or useless things everytime when they make for next version no matter for you but a matter for them because they add a new thing even useless for developer. I am not have any feeling with IE bad but I like to make reviews as well as I can make. I show you something who I experience with IE and someother browser like Chrome and Firefox. IE 9 still have no plugin as well as other provided like Firefox have Firebug a great utilities who is best option for developer to debug their code. IE9 developer tool is good but still you never customize them or readymade customization available to work as in firefox many of person make customization for firebug like example :- firepicker for picking color in firebug , firebug autocomplete for intellisense like feature when you write JavaScript inside console panel , pixelperfect , firequery , sitepoint reference and many other great example we all love to use. as other things that Firefox give many things customizable like themes , ui and many thing customization means more thing user or developer want to make themselves and more contribution make them better software so Firefox is great because customization is a great thing inside firefox and chrome. if you read some post of developer on MSDN to what’s new in IE 9 developer tool that you feel they are joking whenever you see some other things of Firefox and chrome. in a Firefox a plugin perform many much things but in IE still use IE 9 developer tool no other option like in Firefox use Firebug and many other utilities to make development easier and time saving and best as we can do.if you see Firefox page on mozilla that sublines of firefox is high performance easy customization advanced security well you can say what’s performance but there is no comparison with IE because IE have only performance and nothing else. but Firefox have these three thing to make product love. and third thing I really love that security yeah security. from long time before whenever IE6 is no hackproff and many other easily hack IE6 whenever Firefox is secure. I found myself that many of website install a software on client’s computer and they still not know about them so they track everything. sometime they hijack the homepage and make their website as their homepage. sometime they do something and you trying  to go to  any website then they go to their site first. the problem I telling about not long before it’s time of late in 2008 whenever Firefox is much better then IE6. if someone have bad experience with anyone of these software share with us I like to hear your voice. whenever IE still not for use Firefox is a good option for us even user or developer. I not know why someone make next version of IE. IE still have time to go away from Web. Firefox not rude as IE they still believe in user feedback and chrome is also open the door for feedback on their product gooogle Chrome. but what thing they made in IE on user feedback nothing. they still thing to teach what they maked not thing about what user need. if you spent some hour on firefox and chrome then you found what’s matter. what thing you have whenever you use IE or other browser like google chrome and Firefox :- as a user IE give you nothing even tell you blah blah and more blah but still next version of IE means next IE6 for the web. as in Google chrome you find plugins addons or customization to make experience better but in IE9 you can’t customize anything even the themes they have by default. Firefox already have a great list of plugins or addons to make experience better with Web but IE9 have nothing. this means IE9 not for user and other like chrome and firefox give you much better experience then IE. next thing after user is developer. first thing is that all developer want smooth development who save their time not take too perhaps saving.posts on IE9 show that a list of thing improved in IE 9 developer tool but are one developer tool enough for web development so developer need more utilities to solve different different type of puzzle who IE 9 never give like in Firefox you have utilities to do a task even small or big one. in chrome same experience you have but IE9 never give any plugin or utilities to make our work faster even they are new headache for developer because IE not give update as soon as other because in Firefox and in chrome if a bug is reported then they solve them fast and distribute them in next version of software very soon but in IE wait for a long time like IE 9 and IE 8 have no official release between them as update. As my conclusion there is no reason to use IE and adopt 9 again. it’s really not for Developer or user even newbie or smart people. as a rule I want to beware you with IE because it’s my responsibilities to move the thing in good way as I can make. well are you sure that there is no reason or profit they thing to have with IE9  if not why they forget luna [windows xp] user. because they are old nothing they want to force user to give them some money by purchasing a new version of OS. so this a thing why they marketed their software. if you thing about what firefox and chrome want to make : Mozilla's mission is to promote openness, innovation and opportunity on the web. chrome mission we all see whenever we use them. but IE9 is a trick they promote because they want to add something to next version of windows. if somebody like IE9 [even surprised by ads they see or post they read] then they purchase windows soon as they possible. Well you feel that I am opposition of IE9 and favor of chrome and Firefox yeah you feel right I hate IE from a heart not from a pencil. well you get same thing when you have trying three product major I described here Chrome firefox and IE. well don’t believe on the blogs , posts or article who are provided by the merchant or vender’s website. open the eyes read and thing what they talk and feel are they really true. if you confused that compare with some other. now you know the true because no one telling so badly as a user can described who use them not only one who make their feature. always open the eyes don’t believe use your mind and find the truth. thanks for reading my post good bye and take care

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  • Prompted to type password (for installation purpose) AFTER I removed my password. What to do?

    - by Matiss Janis Aboltinš
    I just installed Ubuntu and one of the 1st things that I did was - remove my password. I went into settings - user accounts, clicked on the unlock icon and changed the password to nothing, made it so it doesn't require me to log in, but yet, when I try to install some software I get prompted to type in my password. I tried using nothing and my old password - neither of them work. What should I do to fix this? Do I really have to re-install Ubuntu?

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  • Xubuntu 12.04 notifications buttons don't work

    - by Pawel Karpinski
    "When I tried to reconnect my bluetooth mouse I realized all notification windows do not allow me to press any buttons. Nothing happens. I can close them out but clicking options like "allow" "deny" does nothing." After some googling I found that I'm not the only one with this problem, but I can't find any fix. Any help? :) edit: link with discussion on Ubuntu Forums, where some dude guy has the same problem: http://ubuntuforums.org/showthread.php?p=11917621

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  • PPA Shows Up Under "All Software" That Is No Longer Enabled

    - by Icedrake
    I used to use the Aurora builds of Firefox, but now I've uninstalled Firefox and gone back to Chromium. I've removed the PPA, but it still shows up under "All Software" in the Ubuntu Software Center, when I click on the arrow to the side of it to display my PPAs. I've checked the Software Sources to see if there's anything leftover, and there's nothing. I use Y PPA Manager, and there's nothing there to remove as well. How do I get rid of it?

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  • Screen will not load in 11.04 alpha 3

    - by Saad Inam
    After updating from 10.10, there were no problems everything updated fine. I restarted the computer and selected Ubuntu from the boot menu but nothing came. it only shows a a black screen and it allows me to type. I have a feeling that this might be to do with the graphics driver, but how would i get a driver if nothing shows? I have ati radeon 5450 which runs with Catalyst Control Center on Windows. How can fix this?

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  • Missing resolutions on ubuntu 11.10 fresh install

    - by Sean Marshall
    Today I installed Ubuntu 11.10 for the first time on my computer. My Monitor's resolution is 1280x1024, but the only resolutions in display are "1024x768 (4:3)" and "800x600 (4:3)". I installed all updates, There is nothing in additional drivers and still nothing. I want to set the resolution to 1280x1024. How do I check my graphic card name? By the way Unity 3d is working and compiz effects are working super fast.

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  • Is there another way to restart Ubuntu 12.04's sound system if pulseaudio/ALSA don't work?

    - by Ricardo Altamirano
    I was listening to music, and my sound suddenly went dead in all my applications. I'm using Ubuntu 12.04, which uses pulseaudio, so I tried sudo /etc/init.d/pulseaudio restart, but nothing happened. According to lsof | grep pcm, nothing is using the soundcard at the moment, although I'm not entirely sure if my source for that command is applicable. Is there a way another way to restart Ubuntu 12.04's sound system from the command line without rebooting the system?

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  • Deleted files still accessible without www in url

    - by phlegma
    I have deleted all files and all hidden files off my server, there is nothing but log files which cannot be deleted. Ironically, files are accessible when nothing is there. Cache cleared, multiple browsers and computers/devices checked. Files show when I exclude "www" from the URL http://sarastringfellow.com/assets/photo/c.jpg http://www.sarastringfellow.com/assets/photo/c.jpg What does this mean?

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  • How to remove Ubuntu and put Windows back on?

    - by Josev King
    I installed Ubuntu 12.04, as a dual boot on my windows Vista laptop, and the next thing I know, I get black screen with error: unknown filesystem. grub rescue> I have tried reinstalling Windows, reinstalling Ubuntu, booting from Ubuntu disk, and managed to actually get into the OS, but there is nothing I can find of uninstalling Ubuntu, and deleting the partition it created. I know nothing at all about Linux, and I desperately need to get my laptop back up and running.

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  • G210M Screen brightness control issue

    - by Bapun
    I have a Sony VAIO VPCCW15FG laptop with NVIDIA G210M graphics card. I can't adjust the screen brightness! If I use the Fn shortcuts the brightness notification shows-up and there the brightness changes the level but nothing happens. I was able to adjust the brightness level in ZorinOS. But nothing happens when I changed the bright level, then brightness level changes radically with each step in the last stages.

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  • Will a system restore fix constant crashing/freezing issues?

    - by P102
    My recent installation 10.10 on my laptop keeps freezing/crashing on start-up after working perfectly for one day. The system just freezes, like a screenshot, and a restart is required. It happens directly after login or just as any application is selected. Nothing new has been installed. I have just moved from XP. Will a system restore fix this like in windows? like i said, nothing new has been installed. help is greatly appreciated

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  • Compiz cube configuration

    - by Keynesian
    Sorry for the stupid question but I am new with Linux (I am using Gnome classic with Ubuntu 12.04) and I cannot set compiz in order to obtain the rotating cube. I have already installed compizconfig-setting-manager and also the extra (and fusion) plugins but: even if I disable the desktop wall and enable cube and rotating cube, nothing happens; even if I change into general settings the number of vertical and horizontal virtual size nothing happens. What I need is (possibly) a step by step answer. Thank you

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  • Which server to choose? [closed]

    - by Devbag
    I have telecom applications that I want to run on a server(I have chosen HP server), there are so many types of hp servers i.e DL380 (g3,g4 ....), blade , entry level server. I've surfed the web and nothing is helping me choose one that suites me, what I have is telecom application made in PHP and C. I've found many used DL380 G3,G4 and G5 on craiglist with really good prices, some of them have misssing HD, RAMs and some of them have nothing missing. Can you please help me choose wisely. Thanks,

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  • I dont' know how to install?

    - by Muktar Gazaie
    I've downloaded the USB version from the web site, and the USB Installer, then I run it and it finished, but then nothing happens, I tried to go to ISO and run the setup then It finished and restarted the computer with Windows, Iv'e tried to restart it again and choose Ubuntu but it launches a black screen with some texts and nothing happens, please help me I'm very new to Ubuntu and I need to download it because my Windows is pretty awful!

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  • Assigning shortcuts (accelerators) to Nautilus 3

    - by abruski
    I want to assign some shortcuts to menu actions in Nautilus 3.2.1 running under Ubuntu 11.10. I followed the steps shown here How do you create a "new document" keyboard shortcut? but it did not work for me. Switched to gnome classic so I can get the normal menu, hovered over the desired action pressed the desired keys but nothing happened (restarted nautilus, re-logged and nothing). Any suggestions or ideas on how to assign custom shortcuts to actions in Nautilus 3

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  • Cannot exit X server, restart, shutdown or drop to tty when VGA monitor active

    - by terdon
    I have a strange problem. If I connect an external VGA monitor to my laptop, exiting the X environment in any way crashes the computer. For example, say I am working with my two monitors (the laptop's and one connected to my VGA port) active. Hitting Ctrl+Alt+F Key should take me down to a tty. What actually happens is that the VGA screen goes blank, as you would expect, but the laptop screen, although still on, shows nothing. I know the screen is on because it is slightly more illuminated than when it is off. When in this state, I can do nothing to regain access to the machine. I have tried: Ctrl+F Key (and even Ctrl+Alt+F Key, just in case) combinations and none seem to have any effect. Ctrl+Alt+Del : Nothing Magic SysRq key: Nothing Blindly typing my username and password and trying to reboot/shutdown or restart GDM or MDM: Nothing The only thing that works is a hard reset. The exact same behavior occurs when kiling the X server through Ctrl+Alt+Backspace, rebooting or shutdown. There is no difference if I reboot/shutdown/log out using the WM's graphical menu or if I use the shutdown or rebootcommands. It is also not WM-dependent. I have the same problem using Cinnamon, Gnome 3, MATE and xfce4. It is, however, VGA dependent. I have tried connecting another VGA monitor and have the same problem. I do not, however, have this problem if a screen is connected to the DisplayPort. It is, therefore, a VGA specific issue. To make things even stranger, this only occurs when both screens are active. If either the laptop screen or the VGA monitor is inactive the problem goes away. Finally, this problem arose when I installed the latest Linux Mint Debian (LMDE). It did not occur with the previous release of LMDE. I am not sure what has changed since I used the same kernel version in both releases (I had upgraded the kernel while on the previous release) and, I think, the same nvidia drivers. Oh, and yes, I have updated the nvidia driver. Hardware: Dell M4500 laptop CPU: Intel Core i7 RAM: 8GB Graphics: nVidia GT216 [Quadro FX 880M] Software: LMDE, kernel 3.2.0-2-amd64 Xorg: 1.11.4 nVidia kernel: 295.20-1+3.2.9-1 Possibly relevant files: /var/log/Xorg.0.log ~/.xsession-errors Does anyone have any ideas how to fix this? Thanks in advance for any help.

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