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  • Distinguishing between UI command & domain commands

    - by SonOfPirate
    I am building a WPF client application using the MVVM pattern that provides an interface on top of an existing set of business logic residing in a library which is shared with other applications. The business library followed a domain-driven architecture using CQRS to separate the read and write models (no event sourcing). The combination of technologies and patterns has brought up an interesting conundrum: The MVVM pattern uses the command pattern for handling user-interaction with the view models. .NET provides an ICommand interface which is implemented by most MVVM frameworks, like MVVM Light's RelayCommand and Prism's DelegateCommand. For example, the view model would expose a number of command objects as properties that are bound to the UI and respond when the user performs actions like clicking buttons. Many implementations of the CQRS use the command pattern to isolate and encapsulate individual behaviors. In my business library, we have implemented the write model as command / command-handler pairs. As such, when we want to do some work, such as create a new order, we 'issue' a command (CreateOrderCommand) which is routed to the command-handler responsible for executing the command. This is great, clearly explained in many sources and I am good with it. However, take this scenario: I have a ToolbarViewModel which exposes a CreateNewOrderCommand property. This ICommand object is bound to a button in the UI. When clicked, the UI command creates and issues a new CreateOrderCommand object to the domain which is handled by the CreateOrderCommandHandler. This is difficult to explain to other developers and I am finding myself getting tongue-tied because everything is a command. I'm sure I'm not the first developer to have patterns overlap like this where the naming/terminology also overlap. How have you approached distinguishing your commands used in the UI from those used in the domain? (Edit: I should mention that the business library is UI-agnostic, i.e. no UI technology-specific code exists, or will exists, in this library.)

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  • bash pipe construct to prepend something to the stdoutput of previous command

    - by AndreasT
    I want to use sendmail to send me stuff and want to do it in a oneliner. echo "mail content" | sendmail emailataddres.com Sends it without subject. The subject line must come before the Mail content, so I am looking for something along the lines of: echo "mail content" | prepend "Subject: All that matters" | sendmail emailataddres.com sed and awk tend to be really awkward to use and remember. EDIT:Just to clarify: echo "Mail content" is just an illustrating example. I need to be able to prepend stuff to stdout streams from any source. e.g.: ifconfig, zcat, etc..

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  • Kill xserver from command line (init 3/5 does not work)

    - by John Smith
    Hi, I'm running Linux Mint 10, although I've had this same issue with other variants of Linux. I've been told/found while researching that if the X server hangs or otherwise errors, one can drop to a root prompt, usually at another tty, and execute init 3 (to drop to single user mode) and then init 5 to return to the default, graphical session. Needless to say, I've tried this before in multiple configurations on multiple machines to no avail. The only feedback I receive form executing those two commands is a listing of VMWare services (from a kernel module) that are stopped and then restarted. Note: If I run startx (either before or after init 3), then I am told that the xserver is still running and that I should remove /tmp/.X0-lock. Having tried that, it removes that error message, but claims that the xserver cannot be attached as another instance is running. How do I kill the xserver completely? Can I killall some process name?

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  • Linux wall command won't broadcast strings

    - by mjb
    I read here that this should work, but it doesn't: //usage: wall [file] root@sys:~> mesg is y root@sys:~> wall "who's out there" wall: can't read who's out there. If mesg is set to y, what's preventing me from broadcasting a string? Note, I did confirm that the file option works: root@sys:~> wall test Broadcast Message from root@sys (/dev/pts/1) at 15:23 ... Who's out there? Teach me knowledge please. mjb

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  • Connection to VPN using command line

    - by plurby
    I've wrote a simple batch file to connect to a specific VPN connection using RASDIAL rasdial MyVPNConnection but it always returned the error 691 Access denied because username and/or password is invalid on the domain. Remote Access Service (RAS) Error Code List then i tried pointing to my Remote Access Phonebook (Rasphone.pbk) and see what happens rasdial MyVPNConnection /phonebook:%userprofile%\AppData\Roaming\Microsoft\Network\Connections\Pbk\rasphone.pbk and still there was an error 691. I've then unchecked the following but still the same problem was reported when executing my batch file.

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  • Check if current Command Prompt was launched as the Administrator

    - by Canadian Luke
    I am looking to write a script that takes user input, then makes system wide changes. I need this to be very generic, but simply put, at the top, I need it to check to see if it's being run 'As an Administrator'. If it's not, then I want to display a message to tell them that; if it is, I want it to continue on. Is there a constant way to verify this? I am not looking to start a new session as the Administrator, I just want to detect if it's currently run as admin

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  • Power Shell does not like command

    - by Campo
    Any ideas what I did wrong here? I copied this script from a tutorial and get this error.... PS C:\Windows\system32> Get-Service | Where-Object ($_.status -eq "running") Where-Object : Cannot bind parameter 'FilterScript'. Cannot convert value "False" to type "System.Management.Automation .ScriptBlock". Error: "Invalid cast from 'System.Boolean' to 'System.Management.Automation.ScriptBlock'." At line:1 char:27 + Get-Service | Where-Object <<<< ($_.status -eq "running") + CategoryInfo : InvalidArgument: (:) [Where-Object], ParameterBindingException + FullyQualifiedErrorId : CannotConvertArgumentNoMessage,Microsoft.PowerShell.Commands.WhereObjectCommand

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  • CDPATH in windows command prompt?

    - by barlop
    The accepted answer of this question Fast Ways of Cd'ing on *nix? mentions bash having CDPATH is there an equivalent in windows? so from any directory e.g. c:\windows I could do c:\windowscd compbar* and it'd take me to m:\a\b\c\d\e\compbar what if there are many compbar directories? well, the CDPATH solution is one solution, I suppose you order them it'd search through the CDPATH environment variable and choose the first. I'd like that for windows.

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  • Messy Filesytem : Duplicate File Removal from the command line

    - by jrause
    In debian/ubuntu I want to a) create a list of all the files in one directory tree b) do the same for a second directory tree c) compare the two lists such that, only the file NAMES are compared (i.e. just comparing the "file.txt" part so that "/home/folder/file.txt" == "/home/secondfolder/folder/file.txt) d) output a list of all the duplicates can anyone please explain how to do this using scripting languages or regex or something?

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  • Kill xserver from command line (init 3/5 does not work)

    - by Richard Martinez
    I'm running Linux Mint 10, although I've had this same issue with other variants of Linux. I've been told/found while researching that if the X server hangs or otherwise errors, one can drop to a root prompt, usually at another tty, and execute init 3 (to drop to single user mode) and then init 5 to return to the default, graphical session. Needless to say, I've tried this before in multiple configurations on multiple machines to no avail. The only feedback I receive form executing those two commands is a listing of VMWare services (from a kernel module) that are stopped and then restarted. Note: If I run startx (either before or after init 3), then I am told that the xserver is still running and that I should remove /tmp/.X0-lock. Having tried that, it removes that error message, but claims that the xserver cannot be attached as another instance is running. How do I kill the xserver completely? Can I killall some process name?

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  • Windows 7: Edit group policy from command line

    - by user234461
    I'm writing an installer and need to change all users' wallpaper. I can do this from the group policy editor GUI, but need to do so from my installer. I can't just edit the registry as it gets reset by a GPO on login. How do I apply the relevant administrative template via programatically (preferably cmd.exe or via the registry)? (for interest, it's User Configuration Administrative Templates Desktop Desktop Desktop Wallpaper [sic] Any help would be appreciated. Thanks!

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  • Running a command line app with sudo and password automatically on OS X startup

    - by Designer023
    I need to run an app at startup/login on my mac. I want it to launch in the background and start doing it's work without interrupting me or me having to start it up because I invariably forget and then when I need it, it wasn't running! I have tried using AppleScript to tell Terminal to run it and type my password in, but it ends up opening multiple Terminal windows and not working. Ideally I need a script that I can just add to the user login items and it will run for me. The app has no way of taking a password argument either and it has a password as well as the sudo! I need a solution that can either be done as an applescript (which can be made into an executable) or i need a commandline script but I have no idea about them. This is the manual code I type $ sudo serverStatus password:123456 password:serverpass My AppleScript: tell application Terminal activate do shell script "sudo serverStatus" delay 5 do shell script "123456" delay 2 do shell script "serverpass" end tell

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  • where does the discrepancy between \# in PS1 and n in !n come from?

    - by Cbhihe
    Something has been gnawing at me for a while now and I can't seem to find a relevant answer either in man pages or using your 'Don't be evil' search engine. My .bashrc has the following: shopt -s histappend HISTSIZE=100 HISTFILESIZE=0 # 200 previous value Putting HISTFILESIZE to 0 allows me to start with a clean history slate with each new term window. I find it practical in conjunction with using a prompt that contains \#, because when visualizing a previous command before recalling it with !n or !-p, one can just do: $ history | more to see its relevant "n" value In my case, usually the result of: $ \history | tail -1 | awk '{print $1}' # (I know this is an overkill, don't flame me) equals the expanded value of # in PS1 minus 1, which is how I like it to be at all times. But then, sometimes not. At times the expanded value of # sort of "runs away". It's incremented in such a a manner that it becomes than $(( $(\history | tail -1 | awk '{print $1}')+1 )) Any pointers, anyone?

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  • Ubuntu PPTP VPN to Microsoft Server Command Line ONLY

    - by supreme
    I try to setup a VPN Connection from a Ubuntu 12.04 LTS to Microsoft VPN Server (Ubuntu is the Client in this Case), but I only get this error message: .. connection failed! Check the log messages below for information why. Couldn't open the /dev/ppp device: Operation not permitted FATAL: Module ppp_generic not found./usr/sbin/pppd: Sorry - this system lacks PPP kernel support Details you may need: modprobe -v ppp > FATAL: Module ppp not found. uname -r -> 2.6.32-042stab076.8

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  • Not able to output to file in the Windows command line

    - by Sachin
    In the following code, I need to take the path and size of folder and subfolders into a file. But when the loop runs for the second time, path and size are not getting printed to the file. size.txt only contains the path and size of the 1st folder. Please somebody help me. @echo off SETLOCAL EnableDelayedExpansion SET xsummary= SET xsize= for /f "tokens=1,2 delims=C" %%i IN ('"dir /s /-c /a | find "Directory""') do (echo C%%j >> abcd.txt) for /f "tokens=*" %%q IN (abcd.txt) do ( cd "%%q" For /F "tokens=*" %%h IN ('"dir /s /-c /a | find "bytes" | find /v "free""') do Set xsummary=%%h For /f "tokens=1,2 delims=)" %%a in ("!xsummary!") do set xsize=%%b Set xsize=!xsize:bytes=! Set xsize=!xsize: =! echo.%%q >> size.txt echo.!xsize! >> size.txt )

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  • In Bash, how can I obtain the directory path from the previous command's last argument

    - by Beaming Mel-Bin
    I frequently have to do this. For example: $ vim /etc/pam.d/sudo $ vim /etc/pam.d/sudo-i $ cd /etc/pam.d/ # Figure I should just go to the directory Now, is there a way I could obtain the directory of the last argument when it's a file path? I'm asking this cause I recently became aware of the $_ variable that has become useful. Was wondering if there's some other commandline fu that might come in handy.

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  • Copy file to WebDAV via Command Line on Windows 2003

    - by Boden
    I need to copy a file from a Windows 2003 server to a WebDAV folder (on the same server, if it matters). This operation will be performed via a batch script executed via Scheduled Tasks. I've enabled the WebClient service on the server. So far I've determined that I can do it like this: net use x: http://host/path copy c:\path\myfile.txt x: net use x: /delete 1) Is there a simpler way than creating a temporary mapped drive? Will it work via a batch file when no user is logged in? 2) Is there anything I should know about enabling the WebClient service on my server? Previously it was disabled, which I assume is default.

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  • How to make Windows command prompt treat single quote as though it is a double quote?

    - by mark
    My scenario is simple - I am copying script samples from the Mercurial online book (at http://hGBook.red-bean.com) and pasting them in a Windows command prompt. The problem is that the samples in the book use single quoted strings. When a single quoted string is passed on the Windows command prompt, the latter does not recognize that everything between the single quotes belongs to one string. For example, the following command: hg commit -m 'Initial commit' cannot be pasted as is in a command prompt, because the latter treats 'Initial commit' as two strings - 'Initial and commit'. I have to edit the command after paste and it is annoying. Is it possible to instruct the Windows command prompt to treat single quotes similarly to the double one? EDIT Following the reply by JdeBP I have done a little research. Here is the summary: Mercurial entry point looks like so (it is a python program): def run(): "run the command in sys.argv" sys.exit(dispatch(request(sys.argv[1:]))) So, I have created a tiny python program to mimic the command line processing used by mercurial: import sys print sys.argv[1:] Here is the Unix console log: [hg@Quake ~]$ python 1.py "1 2 3" ['1 2 3'] [hg@Quake ~]$ python 1.py '1 2 3' ['1 2 3'] [hg@Quake ~]$ python 1.py 1 2 3 ['1', '2', '3'] [hg@Quake ~]$ And here is the respective Windows console log: C:\Workpython 1.py "1 2 3" ['1 2 3'] C:\Workpython 1.py '1 2 3' ["'1", '2', "3'"] C:\Workpython 1.py 1 2 3 ['1', '2', '3'] C:\Work One can clearly see that Windows does not treat single quotes as double quotes. And this is the essence of my question.

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  • Command line switching

    - by Larry
    I have read through some suggestions but I am just not technical enough to get this I think. I am a CAD designer and each file has 5 files associated with it. I have 3 sets of 5 files, and each set needs to go into its own zip file, placed on a separate server. For example: "C:\Program Files\7-zip\7z.exe" a file1.zip "O:\server2\map files\BC\BC.d*"-0 "C:\Program Files\7-zip\7z.exe" a file2.zip "O:\server2\map files\BC\ON.d*"-0 "C:\Program Files\7-zip\7z.exe" a file3.zip "O:\server2\map files\BC\AB.d*"-0 and I am in directory "S:\server\map files\provinces" (for example). These lines run within an existing batch file and by the time it reaches the 3 lines above, it's in the S: directory sample above. So it's looking on my pc for the 7-zip program, creating 3 zip file names which it does, but places those zip files on a separate server which it doesn't and the first zip file also includes all the other 10 files, the second zip file the same plus the first zip file, and the third the same with the other two zip files making me think the code isn't recognizing the part after file1.zip where I am trying to tell it what files to include and where to place the zip files. Ultimately, I want to either have the system create a new zip file if the old one was deleted, or copy the new files into the existing zip and overwrite any older files, and for these zip files to be placed in a separate location which is where we share our files with other personnel from within our company. The S: drive is for all originals, and O: is for sharing. Is there a list of all switching options with many different samples?

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  • Sending mail from command line if body not empty

    - by cdecker
    I'd like to write a simple script that alerts me if a log changes. For this I'm using grep to find the lines I'm interested in. Right now it works like this: grep line /var/log/file | mail -s Log [email protected] Problem is that this sends a mail even if no matching lines are found. The mail utility from mailutils seems to have no switch telling it to drop mails that have an empty body. Is there a quick and easy way to do so?

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