Newbie Question On Running System Commands On Windows 7

I’m new to scala and I’m trying to run a system command in a scala script.
 
In Linux, can do:
   import sys.process._
   val result = ("ls").!
 
and it works as expected.
 
In windows:
   import sys.process._
   val result = ("dir").!
 
Gives an error:
java.io.IOException: Cannot run program "dir": CreateProcess error=2, The system
cannot find the file specified
        at java.lang.ProcessBuilder.start(Unknown Source)
        at …
 
I searched the net to find a solution, and found
                http://rosettacode.org/wiki/Execute_a_System_Command
 
Which suggests (obviously for Linux, but the introduction states dir on windows should work):
   import scala.sys.process.Process
   Process("ls", Seq("-oa"))!
 
So I tried Process(“dir”)! with the same results.
 
I’m not a java programmer, but I’m guessing that has something to do with the JVM not behaving correctly and not the Scala Compiler.
 
Any thoughts?
Thanks,
Mike
 
 

OK, OK!  We get that you're new to Scala.  I'm not entirely new to Scala anymore, but I still feel like I'm new to Scala.  The feeling doesn't go away.
Is this one of those Windows things where you have to execute "cmd.exe dir" because there is no standalone "dir.exe"?  Sorry I'm not booted into Windows to check.
With any shell, some commands are built-ins.
My other suggestion is that stackoverflow.com has a lot of eager answerers.  You can post a question like yours which overlaps a couple of domains of expertise and someone somewhere will come up with something useful to say, usually within minutes of your post.
It's kind of annoying, actually, as if some people have their smart phone receive an alert from the SO feed on twitter to buzz their pager (if people still use pagers) so they can excuse themselves from a boring meeting to answer someone's question first and garner those coveted points of repute.  Everyone at the meeting assumes a client issue was escalated and a contract is at stake.
- show quoted text -
- show quoted text -
-- 
You received this message because you are subscribed to the Google Groups "scala-user" group.
To unsubscribe from this group and stop receiving emails from it, send an email to [email protected].
For more options, visit https://groups.google.com/groups/opt_out.
 
 

Well I'm not in a meeting but anyway... 
scala> import sys.process._
scala> "cmd /K dir".!
/Bjorn
Den fredagen den 2:e augusti 2013 kl. 07:04:04 UTC+2 skrev som-snytt:
- show quoted text -

If you prefer ls :-)
scala> import sys.process._
scala> "powershell -Command ls".!
/Bjorn
Den lördagen den 3:e augusti 2013 kl. 15:24:21 UTC+2 skrev Bjorn Regnell:
- show quoted text -

Hi I'm a freshman in hadoop world. After some struggling, i've successfully make hadoop 2.6 running on my windows 7 laptop. However when I want to run hive 1.0.0 on my win 7 system, I found there is no cmd line script as provided for linux. It's also hard to find any useful message in google. That's why i seek here. Anyone can provide me any clue on how to run hive on window 7
Hi I'm a freshman in hadoop world. After some struggling, i've successfully make hadoop 2.6 running on my windows 7 laptop. However when I want to run hive 1.0.0 on my win 7 system, I found there is no cmd line script as provided for linux. It's also hard to find any useful message in google. That's why i seek here. Anyone can provide me any clue on how to run hive on window 7?
Hello all, Is there anyone who have installed Pig on Windows 7, and running successfully? I have an issue with my installation and need help. Thanks, Venkat.
Hi all, I've been trying to get HBase (version 0.94.4) working on my system with Windows 7 for several days now to no avail. I've followed the instructions at http://hbase.apache.org/cygwin.html and tried to get to the bottom of the problem myself, but it looks like now I'm stuck. The weird thing is also that after installing HBase the first time I can use it without problems, but after stopping
When trying to build the solution on VS2010, I'm getting this error in the beginning: mongosrc hird_party un_if_newer.js(72, 9) WshShell.Exec: The system cannot find the file specified. I believe this is preventing the autogenerated header files to populate & thus the build is failing.  Just to note, I'm running Win 7 64-bit, with VS 2010 (also VS 2012 installed), Python 2.7.2. Can anyone please
Hi, I'm a first-time user of Neo4J. I downloaded the community edition (1.6) and ran [inNeo4j.bat start] from the shell. I got the following error: Error occurred during initialization of VM Too small initial heap for new size specified I'm not a Java guy and had to dig around to find a fix. I edited the [conf eo4j-wrapper.conf] changing the [wrapper.java.initmemory] property from 3 to
I am looking into mobile testing through Calabash. After reading some articles on web, I am not sure where to start and what to install. I want to install on windows 7 machine and want to test our app on ios and Android. Please let me know what I will need to install and steps to follow for first timer. Thank you for your cooperation and help. You received this message because you are
I am trying to implement an application from a vendor who has deployed it using Tomcat. Due to a client requirement, I need to use LDAPS to talk to their AD Directory service. I have it working on LDAP, so I know the config is correct at that point. Where I am having a problem is figuring out how to import the cert from the CA I have setup on the AD server. Everything I can find mentions commands
When I run safe_mysqld, it starts and ends immediatly. In the mysqld.log in /var/log it has the following: 010418 21:19:47 mysqld started 010418 21:19:47 /usr/libexec/mysqld: Can't find file: './mysql/host.frm' (errno: 13) 010418 21:19:47 mysqld ended Below is the my.cnf file [mysqld] datadir=/var/lib/mysql socket=/var/lib/mysql/mysql.sock [mysql.server] user=mysql basedir=/
Hi Is there anyone here running multiple mongo instances on windows 7 for production?  So far I have tested instances on windows server 2008 r2.  But those VMs are msdn license. And from my understanding you new multiple shard and replica instances for load balancing and ha, and ms server licenses could be an issue.  If our shop allow linux, it would be great, we don't have enough people
I downloaded play and created a new application following the "getting started" guide on Windows 7. When trying to view the demo application on localhost:9000, play (started from powershell, and then from cmd) could not find javac. This is in my path (I also set JAVA_HOME and tried again). javac is in my path and runs from the shell, Could someone help. Below are the logs.                                
Hi, Well I finely got it. now that I have it I wish I didn't. running the latest beta of talk back and nothing seems to work. Flick to an option and double tap on the option I want. Nothing happens. If I long press on a option sometimes it works. meaning it acts like I double tapped on the option. The system also seems very sluggish I even managed to reset the system to factory defaults
Hi, I'm trying to increment the PermSize on Tomcat 7. I added -XX:PermSize in the java options launching tomcat7w, causing Tomcat to not load and to give me the following error on Windows Server 2012R2: Unrecognized VM option 'PermSize%6m ' The same configuration was working on Windows Server 2007. I was able to start the server adding -XX:PermSize%6m inside double quotes, now the question
I want to run TomCat in debug mode so I can debug my servlet from Eclipse. I installed TomCat 7 using the Windows Installer. It was installed as a service, managed by the Commons Daemon Service Manager. It runs servlets fine (i.e., no problems with normal TC operation). I did the following: 1. Added "jpda start" as Arguments in the Startup tab in the Daemon Service Manager. 2. Created a custom Debug
Hello all, I downloaded mysql-noinstall-5.1.44-winx64.zip on windows 7 home premium. I unzipped the file in my Documents directory. In cygwin, I run bin/mysqld --console, and I see the following error with InnoDB: $ bin/mysqld --console 100228 21:21:47 [Note] Plugin 'FEDERATED' is disabled. 100228 21:21:47 InnoDB: Error: unable to create temporary file; errno: 2 100228 21:21:47 [ERROR]
I am new both to Java and to ActiveMQ. I have successfully installed ActiveMQ, but I have not been able to get the examples to work. At first, I tried the C# examples. The examples would not build because I do not have the DLL containing the Apache.NMS namespace. I found and downloaded a DLL named Apache.NMS.dll, but when I open the Add Reference dialog box and select the Browse tab, browse
Has anyone been able to get mongodb running with the php built in server (32 bit version) on windows. I am having no luck and need some help from someone who has figured this out. thx
Hello, I have this part of code and PDF included special Czech character ---- PDFTextStripperByArea stripper = new PDFTextStripperByArea(); stripper.setSortByPosition( true ); Rectangle rect = new Rectangle ( 10, 280, 275, 60 ); stripper.addRegion( "class1", rect ); List allPages = document.getDocumentCatalog().getAllPages(); PDPage firstPage = (PDPage)allPages.get( 0 );
Hi, I am trying to install Apache HTTP Server v2.2.14 on a machine recently upgraded to Windows 7. Apache worked fine under Windows XP, but when I go to install this in Windows 7, the install script appears to hang. In the install wizard dialog it states: Installing Apache HTTP Server 2.2.14 The program features you selected are being installed. Please wait while the Installation Wizard installs
Although 74 bit Windows 7 is listed as supported [1], I do not see such a binary listed on the download page [2]. Should one use the 32 bit installer on 64 bit Windows? Is the installer page sniffing my UA (Firefox on Debian) and trying to guess as to the correct binary for me? Am I looking in the wrong place? Thanks. [1] http://www.mysql.com/support/supportedplatforms/database.html [