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• View/ViewModel Interaction - Bindings, Commands and Triggers

  It looks like I have a set of posts on ViewModel, aka MVVM, that have organically emerged into a series or story of sorts. Recently, I blogged about The Case for ViewModel, and another on View/ViewModel Association using Convention and Configuration, and a long while back now, I posted an Introduction to the ViewModel Pattern as I was myself picking up this pattern, which has since become the natural way for me to program client applications. This installment adds to this on-going series. I've...Did you know that DotNetSlackers also publishes .net articles written by top known .net Authors? We already have over 80 articles in several categories including Silverlight. Take a look: here.

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• Ubuntu 14.04 : Lost my sound randomly tried a few commands and I think I failed

  - by Marc-Antoine Théberge

  I lost my sound the other day and I tried to delete pulseaudio then reinstall, then I tried to delete it and install alsa, It did not work and I had to reinstall everything; overall bad idea... now I can't have any sound. Should I do a fresh install? I don't know how to boot an usb drive with GRUB... Here's my sysinfo System information report, generated by Sysinfo: 2014-05-28 05:45:58 http://sourceforge.net/projects/gsysinfo SYSTEM INFORMATION Running Ubuntu Linux, the Ubuntu 14.04 (trusty) release. GNOME: 3.8.4 (Ubuntu 2014-03-17) Kernel version: 3.13.0-27-generic (#50-Ubuntu SMP Thu May 15 18:08:16 UTC 2014) GCC: 4.8 (i686-linux-gnu) Xorg: 1.15.1 (16 April 2014 01:40:08PM) (16 April 2014 01:40:08PM) Hostname: mark-laptop Uptime: 0 days 11 h 43 min CPU INFORMATION GenuineIntel, Intel(R) Atom(TM) CPU N270 @ 1.60GHz Number of CPUs: 2 CPU clock currently at 1333.000 MHz with 512 KB cache Numbering: family(6) model(28) stepping(2) Bogomips: 3192.13 Flags: fpu vme de pse tsc msr pae mce cx8 apic sep mtrr pge mca cmov pat clflush dts acpi mmx fxsr sse sse2 ss ht tm pbe nx constant_tsc arch_perfmon pebs bts aperfmperf pni dtes64 monitor ds_cpl est tm2 ssse3 xtpr pdcm movbe lahf_lm dtherm MEMORY INFORMATION Total memory: 2007 MB Total swap: 1953 MB STORAGE INFORMATION SCSI device - scsi0 Vendor: ATA Model: ST9160310AS HARDWARE INFORMATION MOTHERBOARD Host bridge Intel Corporation Mobile 945GSE Express Memory Controller Hub (rev 03) Subsystem: ASUSTeK Computer Inc. Device 8340 PCI bridge(s) Intel Corporation NM10/ICH7 Family PCI Express Port 1 (rev 02) (prog-if 00 [Normal decode]) Intel Corporation NM10/ICH7 Family PCI Express Port 2 (rev 02) (prog-if 00 [Normal decode]) Intel Corporation NM10/ICH7 Family PCI Express Port 4 (rev 02) (prog-if 00 [Normal decode]) Intel Corporation 82801 Mobile PCI Bridge (rev e2) (prog-if 01 [Subtractive decode]) Intel Corporation NM10/ICH7 Family PCI Express Port 1 (rev 02) (prog-if 00 [Normal decode]) Intel Corporation NM10/ICH7 Family PCI Express Port 2 (rev 02) (prog-if 00 [Normal decode]) Intel Corporation NM10/ICH7 Family PCI Express Port 4 (rev 02) (prog-if 00 [Normal decode]) Intel Corporation 82801 Mobile PCI Bridge (rev e2) (prog-if 01 [Subtractive decode]) ISA bridge Intel Corporation 82801GBM (ICH7-M) LPC Interface Bridge (rev 02) Subsystem: ASUSTeK Computer Inc. Device 830f IDE interface Intel Corporation 82801GBM/GHM (ICH7-M Family) SATA Controller [IDE mode] (rev 02) (prog-if 80 [Master]) Subsystem: ASUSTeK Computer Inc. Device 830f GRAPHIC CARD VGA controller Intel Corporation Mobile 945GSE Express Integrated Graphics Controller (rev 03) (prog-if 00 [VGA controller]) Subsystem: ASUSTeK Computer Inc. Device 8340 SOUND CARD Multimedia controller Intel Corporation NM10/ICH7 Family High Definition Audio Controller (rev 02) Subsystem: ASUSTeK Computer Inc. Device 831a NETWORK Ethernet controller Qualcomm Atheros AR8121/AR8113/AR8114 Gigabit or Fast Ethernet (rev b0) Subsystem: ASUSTeK Computer Inc. Device 8324

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• Linux Commands: Making Bash Error Messages Friendlier

  <b>Linux Planet:</b> "Bash error messages, like so many error messages, can be more cryptic than helpful. But the good news is bash has a built-in mechanism for creating your own customized error messages, and you don't have to be an ace programmer to do it. Ubuntu and openSUSE already use this; Akkana Peck shows us how to do it ourselves."

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• The .NET 4.5 async/await Commands in Promise and Practice

  The .NET 4.5 async/await feature provides an opportunity for improving the scalability and performance of applications, particularly where tasks are more effectively done in parallel. The question is: do the scalability gains come at a cost of slowing individual methods? In this article Jon Smith investigates this issue by conducting a side-by-side evaluation of the standard synchronous methods and the new async methods in real applications.

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• Tutorial: Linux Commands: Making Bash Error Messages Friendlier

  Bash error messages, like so many error messages, can be more cryptic than helpful. But the good news is bash has a built-in mechanism for creating your own customized error messages, and you don't have to be an ace programmer to do it. Ubuntu and openSUSE already use this; Akkana Peck shows us how to do it ourselves.

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• Visual Studio 2010 Zooming Keyboard Commands, Global Zoom

  One of my favorite features in Visual Studio 2010 is zoom. It first caught my attention as a useful tool for screencasts and presentations, but after getting used to it Im finding that its really useful when Im developing letting me zoom out to see the big picture, then zoom in to concentrate on a few lines of code. Zooming without the scroll wheel The common way youll see this feature demonstrated is with the mouse wheel you hold down the control key and scroll up or down to change font size....Did you know that DotNetSlackers also publishes .net articles written by top known .net Authors? We already have over 80 articles in several categories including Silverlight. Take a look: here.

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• Commands don't have permission when using absplute path

  - by Markos

  I have folders set up this way: /srv/samba/video getfacl /srv/samba/video # file: srv/samba/video # owner: root # group: nogroup user::rwx group::--- group:sambaclients:rwx group:deluge:rwx mask::rwx other::--- default:user::rwx default:group::--- default:group:sambaclients:rwx default:group:deluge:rwx default:mask::rwx default:other::--- That means, user deluge has rwx to folder /srv/samba/video. However, when running command as user deluge, I am getting weird permission errors. When in folder /srv/samba/video: sudo -u deluge mkdir foo works flawlessly. But when using absolute path: sudo -u deluge mkdir /srv/samba/video/foo I am getting permission denied. When running sudo -u deluge id, I get output uid=113(deluge) gid=124(deluge) skupiny=124(deluge) which shows that user deluge is indeed in group deluge. Also, the behavior was the same when I gave the permissions also to user deluge not just group deluge. When executing as non-system user, it does work. The reason that I want to use absolute paths is that I am using automatically triggered post-download script which extracts some files into the folder. I have spent way too many hours to solve this problem myself. mkdir isn't the only command that fails, touch is doing the same thing, so I suspect that it's not mkdir's fault. If you need more info, I will try to put it in here, just ask. Thanx in advance.

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• Openjdk-7-jdk some commands not recognized?

  - by function

  I installed openjdk-7-jdk using apt-get install. However, when I type 'javac', the terminal says, 'bash: /usr/bin/javac: No such file or directory'. I think the link is broken, but how can I fix it? Note: I installed openjdk-7-jdk before, but then I removed openjdk and installed sun-java. Now I deleted sun-jdk and want to go back to openjdk, but javac is not recognized. I'm using Ubuntu 11.10. Edit: Recognized: java; Not Recognized: javac, javadoc, appletviewer, ...

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• Why can't I run any Android NDK commands?

  - by TheBuzzSaw

  I had been running Mint 12 before, and everything was working there. I switched to Ubuntu 12.04, and now I am very frustrated. When I run ndk-build, I get /home/buzz/ndk/prebuilt/linux-x86/bin/make: not found So, I changed to that folder directly. When I type in ./make, I get bash: ./make: No such file or directory Typing ls clearly shows the file where I am! I did some hacking around (pointing to external tools) to get past each error (just to experiment), and I ran into this! /home/buzz/ndk/toolchains/arm-linux-androideabi-4.6/prebuilt/linux-x86/bin/arm-linux-androideabi-gcc: Command not found Why? Why are all these files unable to be found? As I said above, this was all working just fine in another distro. What changed? What's extra frustrating is that if I push TAB to auto-complete, it works. So, the file is clearly there (and clearly marked with execution permissions). So, why can't it be found?

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• 5 most common and useful commands/tools for Linux administrators

  <b>Linux Admin Zone:</b> "Here I am just trying to figure out 5 of such useful tools which are used by a normal Linux administrator in day to day operations."

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• Database commands

  - by user12609425

  Ops Center has two database options - you can have Ops Center automatically install a database on the Enterprise Controller system, or you can use your own database on any system you choose. If you use your own database, it's obviously important to make sure that this database is running smoothly. You have a few tools that can help you do this. The first is the ecadm command. This command has a variety of subcommands that let you view and control the status of the Enterprise Controller. Two subcommands in particular are relevant to the database: ecadm verify-db: This subcommand verifies that the database is reachable and that the schemas are configured with the proper permissions. Use the -v option if you want more details; the command is normally terse if the DB is configured correctly. ecadm sqlplus -r: This subcommand opens an sqlplus console connection to the database. The -r option makes this console read-only, which isn't necessary, but is generally a good idea. You can also view the database contents using Oracle SQL Developer or other tools. The Accessing Core Product Data how-to describes this process.

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• Handling commands or events that wait for an action to be completed afterwards

  - by virulent

  Say you have two events: Action1 and Action2. When you receive Action1, you want to store some arbitrary data to be used the next time Action2 rolls around. Optimally, Action1 is normally a command however it can also be other events. The idea is still the same. The current way I am implementing this is by storing state and then simply checking when Action2 is called if that specific state is there. This is obviously a bit messy and leads to a lot of redundant code. Here is an example of how I am doing that, in pseudocode form (and broken down quite a bit, obviously): void onAction1(event) { Player = event.getPlayer() Player.addState("my_action_to_do") } void onAction2(event) { Player = event.getPlayer() if not Player.hasState("my_action_to_do") { return } // Do something } When doing this for a lot of other actions it gets somewhat ugly and I wanted to know if there is something I can do to improve upon it. I was thinking of something like this, which wouldn't require passing data around, but is this also not the right direction? void onAction1(event) { Player = event.getPlayer() Player.onAction2(new Runnable() { public void run() { // Do something } }) } If one wanted to take it even further, could you not simply do this? void onPlayerEnter(event) { // When they join the server Player = event.getPlayer() Player.onAction1(new Runnable() { public void run() { // Now wait for action 2 Player.onAction2(new Runnable() { // Do something }) } }, true) // TRUE would be to repeat the event, // not remove it after it is called. } Any input would be wonderful.

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• How to run CLI commands from the launcher?

  - by user50849

  I press ALT+F2 key on my keyboard, and get the launcher HUD up. From there I enter a command as I would in a shell, specifically vlc ~/Music/* -Z. If done from a shell, vlc starts and begins to play music. However, when done from the launcher, VLC replies: File reading failed: VLC could not open the file "/home/[username]/Music/*". (No such file or directory) user Your input can't be opened: VLC is unable to open the MRL 'file:///home/[username]/Music/%2A'. Check the log for details. I can't quite figure out what the difference is.

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• Create new terminal commands

  - by sleort

  I recently installed eclipse the manual way. Extracting the file, setting up eclipse.desktop etc. It all works flawlessly. I also know it is possible to install eclipsee using sudo apt-get install eclipse-platform. If I use this method I can use the command eclipse in the terminal, and the program will start. Now the manual way I used does not enable the eclipse-command in the terminal. Instead if I use eclipse-command it asks me to install eclipse from the Softwarecenter (sudo apt-get install eclipse-platform). I wondered if there was some way of setting up a command like this to start eclipse? If so, can I do it for other programs like Apache-Maven mvn-command? I don't want to use "aliases" because I cannot setup and eclipse alias, when "eclipse" is listed in the apt repository. It seems as if only if I install the eclipse from apt-get install I can start eclipse from a single command in the terminal. I appreciate any help, and thanks in advance!

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• How does the HUD prioritize commands?

  - by user50849

  Every now and then I want to reach the "Edit Preferences" menu item in Firefox, and the HUD makes this very convenient. ALT + "Edi" will suggest exactly that to me. Something that I find annoying however is that if I complete the work "Edit" instead, the HUD will switch to suggest "Network Edit preferences" instead. While this is a perfectly valid match as well, it seems like an inconsistent behaviour to me. Could someone explain in more detail how the matching works, so that I can make better use of the HUD?

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• Vim: How to execute commands stored in a textfile opened in Vim

  - by vbd

  I store, commands found at http://www.commandlinefu.com/commands/browse, in a text file. If I open this text file in Vim and I want to execute the command where the cursor is actually located I do copy the line with Y, switching to command mode with : and !CTRL+r* Is there a more "lazy" possibility ;)

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• Combine multiple unix commands into one output

  - by Ben McCormack

  I need to search our mail logs for a specific e-mail address. We keep a current file named maillog as well as a week's worth of .bz2 files in the same folder. Currently, I'm running the following commands to search for the file: grep [email protected] maillog bzgrep [email protected] *.bz2 Is there a way combine the grep and bzgrep commands into a single output? That way, I could pipe the combined results to a single e-mail or a single file.

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• netsh doesn't provide commands

  - by Petr Marek

  According to Netsh Commands for Wired Local Area Network (LAN) in Windows Server 2008 and Windows Server 2008 R2, netsh should provide commands such as netsh add profile filename="profile.xml" interface="Local Area Connection" but that's an unknown command for my netsh. Even if I enter netsh show /? it shows me only two options: 'show alias' and 'show helper'. Maybe some library/modules or something is missing? I tested with admin permissions in PowerShell.

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• cli commands not working asterisk on ubuntu

  - by Mian Khurram Ijaz

  hi guys today my first day on asterisk on ubuntu. I installed vmware and then ubuntu and then on ubuntu i am running asterisk. i started the asterisk server successfully by following a tutorial. After making few changes into the sip.conf i want to reload the sip.conf i issue the command sip reload and nothing happens neither the commands to restart the asterisk server work actually the commands do not exists can some please throw light or point to right direction. thanks

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• Executing Windows administrative shell commands on Windows using Python

  - by at0m

  I have a batch script using Windows shell commands to perform several administrative actions. The script is running great on Windows 7 but when i try launching it from Python 2.6 nothing happens: import os a = os.popen("somebatchfile.bat") I assume that this is because the bat file uses several commands that require an administrative privileges but i don't want to prompt to a password using runas.exe or embedding the password within the code. Is there any way to make UAC prompt for user approval or something?

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• How do I list commands shadowed by other commands in PATH?

  - by sds

  How do I list all the commands in my path which are shadowed by other commands? E.g., if I have /bin/foo, /bin/bar, /usr/local/bar and /usr/bin/foo, I want to see something like foo in /bin shadows /usr/bin bar in /bin shadows /usr/local/bin I guess I can throw together something based on ls and comm, but I would much prefer something out of the box, especially bash-based (it would also be nice if aliases and functions were searched too, but that is not too important).

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• 3, and 4 finger mouse commands stopped working in MacBook Pro

  - by Phenom

  2 finger commands for scrolling up and down a page work, but 3 and 4 button mouse commands don't work anymore in my MacBook Pro running Snow Leopard. What happened? How can they be re-enabled?

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• Logging commands executed by remote shell scripts

  - by user145836

  I've noticed that when running a script that connects to a number of our servers (to essentially run batch commands) that the commands aren't logged in the user's .sh_history or .bash_history files. Is there a place where this is logged (assuming the script itself isn't doing the logging and I'm not tee'ing the output anywhere)? I'm talking specifically about AIX, but I would assume this question applies to all the *nix flavors. Thanks!

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• OS evaluate in bash script

  - by moata_u

  i was thinking in way that before run my script , evaluate which operating system that user use ubuntu or solaris , am using this because there is some differences in command option in each OS such as sed .. , i was trying the following : sysEval=`grep "ubuntu" | uname -a` if [ sysEval ]; then .......some command else ....... some command fi NOTE That my script will run only in ubuntu or solaris seems not working !

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• Launch Windows Explorer From Current Command Prompt Folder

  - by Gopinath

  While using Command prompt did you ever felt like accessing the files of current folder using Windows Explorer? Here is a simple command that launches Windows Explorer and opens up current folder content         explorer .   This tip is very handy for all the command prompt lovers to quickly return to Windows Explorer and perform some mouse based operations. via how to geek Join us on Facebook to read all our stories right inside your Facebook news feed.

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