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• McAfee VirusScan for Mac OS X logs 'getgrnam("Virex")' error every 10 seconds

  - by crb

  Every 10 seconds, something like the following appears in the Mac OS X system log: 17/12/2009 14:51:11 com.apple.launchd[1] (com.mcafee.virusscan.ScanManager[20499]) getgrnam("Virex") failed 17/12/2009 14:51:11 com.apple.launchd[1] (com.mcafee.virusscan.ScanManager[20499]) Exited with exit code: 1 17/12/2009 14:51:11 com.apple.launchd[1] (com.mcafee.virusscan.ScanManager) Throttling respawn: Will start in 10 seconds 17/12/2009 14:51:13 com.apple.launchd[1] (com.mcafee.virusscan.VShieldEPOInterface[20500]) getgrnam("Virex") failed 17/12/2009 14:51:13 com.apple.launchd[1] (com.mcafee.virusscan.VShieldEPOInterface[20500]) Exited with exit code: 1 17/12/2009 14:51:13 com.apple.launchd[1] (com.mcafee.virusscan.VShieldEPOInterface) Throttling respawn: Will start in 10 seconds

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• Mac OS X VirtualBox Update to 10.6.6

  - by DickSavagewood

  Hi. I was able to get Mac OS X 10.6.2 to work on my 64-bit Acer on VirtualBox multiple times, but I would like to update to 10.6.6. Every time I do, however, I continue to get this annoying error, saying that the kernal and OS version mismatch, and the OS Version is no longer set. What is the proper way to update to Mac OS 10.6.6 because I have heard of it being done before. Thanks in advance for your help, Thommaye

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• JVM disappeared on Mac OS X Snow Leopard 10.6.8

  - by weisjohn

  I'm working in Eclipse one night, (also using Android's DDMS from the commandline). The next morning, I open the lid... attempt to run Eclipse and get an error. me$ sudo /Applications/eclipse/eclipse JavaVM: requested Java version ((null)) not available. Using Java at "" instead. JavaVM: Failed to load JVM: /bundle/Libraries/libserver.dylib So I then attempt to find out where my JDKs are pointed: me$ ls -la /System/Library/Frameworks/JavaVM.framework/Versions/ total 64 drwxr-xr-x 12 root wheel 408 Nov 16 10:44 . drwxr-xr-x 12 root wheel 408 Sep 7 09:39 .. lrwxr-xr-x 1 root wheel 5 Sep 7 17:07 1.3 -> 1.3.1 drwxr-xr-x 3 root wheel 102 Dec 2 2009 1.3.1 lrwxr-xr-x 1 root wheel 10 Sep 7 17:07 1.4 -> CurrentJDK lrwxr-xr-x 1 root wheel 10 Sep 7 17:07 1.4.2 -> CurrentJDK lrwxr-xr-x 1 root wheel 10 Sep 7 17:07 1.5 -> CurrentJDK lrwxr-xr-x 1 root wheel 10 Sep 7 17:07 1.5.0 -> CurrentJDK lrwxr-xr-x 1 root wheel 10 Sep 7 17:07 1.6 -> CurrentJDK drwxr-xr-x 9 root wheel 306 Nov 16 10:44 A lrwxr-xr-x 1 root wheel 1 Sep 7 17:07 Current -> A lrwxr-xr-x 1 root wheel 59 Sep 7 17:07 CurrentJDK -> /System/Library/Java/JavaVirtualMachines/1.6.0.jdk/Contents Everything looks normal so far... me$ ls -la /System/Library/Java/JavaVirtualMachines/ total 0 drwxr-xr-x 2 root wheel 68 Nov 16 10:44 . drwxr-xr-x 5 root wheel 170 Nov 16 10:44 .. Apparently, my virtual machines have been deleted or moved? I'll probably be able to just re-install Java, but does anyone have any insight into why this may have happened or how to prevent in the future?

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• Mounting any Windows share from OS X 10.7.5 suddenly stopped working

  - by user2169619

  I have problem with mounting Windows network shares from my OS X 10.7.5 - it worked but it stopped and nothing helps and nothing in logs. Here what I get when trying to mount it manually: mount -t smbfs //10.0.0.7/d /tmp/test When doing sniffing with tshark - no packet it sent through and I get immediately return from the command: mount_smbfs: server connection failed: Unknown error: -1 Nothing in /var/log/syslog.log and /var/log/kern.log. The Finder does not work either - it throws an error that something is wrong (in czech thus I'm not sending the message here). I just cannot connect to any network shares. In virtual Windows 7 in Parallels Desktop I can connect successfully, but not within the network share (so the Win7 is behind OS X NAT) but only with its own IP address. The Windows server share is on the same network segment connected through switch. Any advice how to debug and what can be wrong? I spent hours to find solution on Google and here but no-one with this kind of problem and I do not know how to further debug it since there is no meaningful log / trace etc. I can ping 10.0.0.7 and I can connect to FTP server on 10.0.0.7 - the Windows machine (XP) has firewall completely turned off. The problem is that with tshark, I'm not seeing any packet sending to 10.0.0.7 so it's not even trying to reach the server.

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• installation of mac 10.6.2

  - by mahesh

  hi i installed vmware workstation 7.0 in windows,and it working well.i installed mac os 10.4.8 in it as a guest it is alo working well,but while installin mac os 10.6.2 it dont installed and shows an error as "invalid front-side bus freqency 66000000 hz. disablin the cpu." please help me how to solve this and please suggest any link to easyly understand installation if mac os 10.6.2

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• 2 Nics - Same Subnet..Route backup traffic through one of them

  - by Matthewhall58

  I have a windows server and a centos linux server. I want the nightly backup file (targz) that copies to the windows machine to use a different nic so that the main nic is not burdenend with moving the large file. Each server has 2 Nics in it. the network is 10.173.10.0 mask 255.255.255.192 Centos Linux Box: Eth0 is configured with 10.173.10.80 mask 255.255.255.192 gw 10.173.10.65 Eth 1 is configured with 10.173.10.71 mask 255.255.255.192 gw 10.173.10.65 Windows Box Eth 0 is 10.173.10.72 mask 255.255.255.192 gw 10.173.10.65 Eth 1 is 10.173.10.70 mask 255.255.255.192 gw 10.173.10.65 I can ping each machine from each machine. On the linux machine I use the command route add -host 10.173.10.70 dev eth1 but then when i ping 10.173.10.70 it is unreachable..... WHY?

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• Blogging is Hard

  - by Aaron Lazenby

  Not really. But wi-fi access is limited to common areas in the COLLABORATE 10 conference center here in Las Vegas. So my grand roving iPad blog update plan has been delayed a day while I measured signal strength and searched for a place to sit. Tuesday morning, I accomplished both. Yesterday I shot a nice, quick video of Bahseer Khan about embedded decision support--a part of his Oracle Fusion Applications presentation that I think could do with some additional discussion as we ramp up for Oracle's next-generation applications. I'll post that video here by the end of the day. Later today I'll also be interviewing OAUG president David Ferguson about the prevailing trends at COLLABORATE 10, the addition of Sun (and Sun's user groups) to the Oracle portfolio, and what the next 12 month holds in store for the Oracle user community. Look for that video later today too. If you can't wait for me to dash down to the lobby to make a blog update, don't forget that you can follow Profit at COLLABORATE 10 on Twitter (@OracleProfit). That way, you'll get updates about Billy Cripe's kilt in real time. More to come as this day develops. Next up: virtualization. Also, notes and coverage from yesterday's keynote presentation.

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• Scala for Junior Programmers?

  - by Traldin

  Hi, we are considering Scala for a new Project within our company. We have some Junior Programmers with only PHP knowledge, and we are in doubt that they can handle Scala. What are your opinions? Some say: "Scala is a complicated beast!", some say: "It's easy once you got it." Maybe someone has real-world experience?

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• process csv in scala

  - by portoalet

  I am using scala 2.7.7, and wanted to parse CSV file and store the data in SQLite database. I ended up using OpenCSV java library to parse the CSV file, and using sqlitejdbc library. Using these java libraries makes my scala code looks almost identical to that of Java code (sans semicolon and with val/var) As I am dealing with java objects, I can't use scala list, map, etc, unless I do scala2java conversion or upgrade to scala 2.8 Is there a way I can simplify my code further using scala bits that I don't know? val filename = "file.csv"; val reader = new CSVReader(new FileReader(filename)) var aLine = new Array[String](10) var lastSymbol = "" while( (aLine = reader.readNext()) != null ) { if( aLine != null ) { val symbol = aLine(0) if( !symbol.equals(lastSymbol)) { try { val rs = stat.executeQuery("select name from sqlite_master where name='" + symbol + "';" ) if( !rs.next() ) { stat.executeUpdate("drop table if exists '" + symbol + "';") stat.executeUpdate("create table '" + symbol + "' (symbol,data,open,high,low,close,vol);") } } catch { case sqle : java.sql.SQLException => println(sqle) } lastSymbol = symbol } val prep = conn.prepareStatement("insert into '" + symbol + "' values (?,?,?,?,?,?,?);") prep.setString(1, aLine(0)) //symbol prep.setString(2, aLine(1)) //date prep.setString(3, aLine(2)) //open prep.setString(4, aLine(3)) //high prep.setString(5, aLine(4)) //low prep.setString(6, aLine(5)) //close prep.setString(7, aLine(6)) //vol prep.addBatch() prep.executeBatch() } } conn.close()

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• noClassDefFoundError using Scala Plugin for Eclipse

  - by Jacob Lyles

  I successfully implemented and ran several Scala tutorials in Eclipse using the Scala plugin. Then suddenly I tried to compile and run an example, and this error came up: Exception in thread "main" java.lang.NoClassDefFoundError: hello/HelloWorld Caused by: java.lang.ClassNotFoundException: hello.HelloWorld at java.net.URLClassLoader$1.run(URLClassLoader.java:200) at java.security.AccessController.doPrivileged(Native Method) at java.net.URLClassLoader.findClass(URLClassLoader.java:188) at java.lang.ClassLoader.loadClass(ClassLoader.java:315) at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:330) at java.lang.ClassLoader.loadClass(ClassLoader.java:250) at java.lang.ClassLoader.loadClassInternal(ClassLoader.java:398) After this point I could no longer run any Scala programs in Eclipse. I tried cleaning and rebuilding my project, closing and reopening my project, and closing and reopening Eclipse. Eclipse version number 3.5.2 and Scala plugin 2.8.0 Here is the original code: package hello object HelloWorld { def main(args: Array[String]){ println("hello world") } }

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• Why does the definition of Array.map in Scala is "throw new Error()"

  - by Oscar Reyes

  The source code of map for Array is: override def map[B](f: A => B): Array[B] = throw new Error() But the following works: scala> val name : Array[String]= new Array(1) name: Array[String] = Array(null) scala> name(0)="Oscar" scala> val x = name.map { ( s: String ) => s.toUpperCase } x: Array[java.lang.String] = Array(OSCAR)

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• Scala regex Named Capturing Groups

  - by Brent

  In scala.util.matching.Regex trait MatchData I see that there support for groupnames (Named Capturing Groups) But since Java does not support groupnames until version 7 as I understand it, Scala version 2.8.0.RC4 (Java HotSpot(TM) 64-Bit Server VM, Java 1.6. gives me this exception: scala> val pattern = """(?<login>\w+) (?<id>\d+)""".r java.util.regex.PatternSyntaxException: Look-behind group does not have an obvio us maximum length near index 11 (?<login>\w+) (?<id>\d+) ^ at java.util.regex.Pattern.error(Pattern.java:1713) at java.util.regex.Pattern.group0(Pattern.java:2488) at java.util.regex.Pattern.sequence(Pattern.java:1806) at java.util.regex.Pattern.expr(Pattern.java:1752) at java.util.regex.Pattern.compile(Pattern.java:1460) So the question is Named Capturing Groups supported in Scala? If so any examples out there? If not I might look into the Named-Regexp lib from clement.denis.

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• Scala script to copy files

  - by kulkarni

  I want to copy file a.txt to newDir/ from within a scala script. In java this would be done by creating 2 file streams for the 2 files, reading into buffer from a.txt and writing it to the FileOutputStream of the new file. Is there a better way to achieve this in scala? May be something in scala.tools.nsc.io._. I searched around but could not find much.

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• Do Scala and Erlang use green threads?

  - by CHAPa

  I've been reading a lot about how Scala and Erlang does lightweight threads and their concurrency model (actors). However, I have my doubts. Do Scala and Erlang use an approach similar to the old thread model used by Java (green threads) ? For example, suppose that there is a machine with 2 cores, so the Scala/Erlang environment will fork one thread per processor? The other threads will be scheduled by user-space (Scala VM / Erlang VM ) environment. Is this correct? Under the hood, how does this really work?

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• Scala/Erlang use something like greenThread or not ?

  - by CHAPa

  Hi all, Im reading a lot about how scala/Erlang does lightweight threads and your concurrency model ( Actor Model ). Off course, some doubts appear in my head. Scala/Erlang use a approach similar to the old thread model used by java (greenThread) ? for example, suppose that there is a machine with 2 cores, so the scala/erlang environment will fork one thread per processor ? The other threads will be scheduled by user-space( scala VM / erlang vm ) environment. is it correct ? how under the hood that really work ? thanks a lot.

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• What are the biggest differences between Scala 2.8 and Scala 2.7?

  - by André Laszlo

  I've written a rather large program in Scala 2.75, and now I'm looking forward to version 2.8. But I'm curious about how this big leap in the evolution of Scala will affect me. What will be the biggest differences between these two versions of Scala? And perhaps most importantly: Will I need to rewrite anything? Do I want to rewrite anything just to take advantage of some cool new feature? What exactly are the new features of Scala 2.8 in general?

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• Common programming mistakes for Scala developers to avoid

  - by jelovirt

  In the spirit of Common programming mistakes for Java developers to avoid? Common programming mistakes for JavaScript developers to avoid? Common programming mistakes for .NET developers to avoid? Common programming mistakes for Haskell developers to avoid? Common programming mistakes for Python developers to avoid? Common Programming Mistakes for Ruby Developers to Avoid Common programming mistakes for PHP developers to avoid? what are some common mistakes made by Scala developers, and how can we avoid them? Also, as the biggest group of new Scala developers come from Java, what specific pitfalls they have to be aware of? For example, one often cited problem Java programmers moving to Scala make is use a procedural approach when a functional one would be more suitable in Scala. What other mistakes e.g. in API design newcomers should try to avoid.

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• Launch Scala REPL programatically?

  - by David Crawshaw

  I would like to launch a Scala Swing application from the command line, then after the application is started, drop into the Scala REPL to use as a control interface. Ideally I would also like to pre-bind some variable names. Even better would be using a Java2D terminal emulator for the REPL, but I couldn't find anything appropriate. Does the Scala REPL have a public API?

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• Java->Scala Remove Iterator<T>-Element from a JavaConversions-wrapped Iterable

  - by ifischer

  I have to translate the following code from Java to Scala: for (Iterator<ExceptionQueuedEvent> i = getUnhandledExceptionQueuedEvents().iterator(); i.hasNext();) { ExceptionQueuedEvent event = i.next(); try { //do something } finally { i.remove(); } } I'm using the JavaConversions library to wrap the Iterable. But as i'm not using the original Iterator, i don't know how to remove the current element correctly from the collection the same way as i did in Java: import scala.collection.JavaConversions._ (...) for (val event <- events) { try { //do something } finally { //how can i remove the current event from events? } } Can someone help me? I guess it's easy, but i'm still kinda new to Scala and don't understand what's going on when Scala wraps something of Java.

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• Scala 2.8: use Java annotation with an array parameter

  - by yournamehere

  I'm trying to implement an JavaEE Session Bean with Scala 2.8. Because it's a Remote Session Bean, i have to annotate it with the following Java Annotation: @Target({ElementType.TYPE}) @Retention(RetentionPolicy.RUNTIME) public @interface Remote { Class[] value() default {}; } I only found this example for scala 2.7. In Scala 2.7, its possible to define the session bean like this: @Remote {val value = Array(classOf[ITest])} class MyEJB ... How can i use this annotation the same way with Scala 2.8? I already tried many different versions, all resulting in "annotation argument needs to be a constant", "illegal start of simple expression". All of these definitions don't work: @Remote{val value = Array(classOf[PersonScalaEJB])} @Remote(val value = Array(classOf[PersonScalaEJB])) @Remote(Array(classOf[PersonScalaEJB]))

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• Scala in image procesing

  - by Mayank Sinha

  I am new to scala and keep on researching and compiling programs , But i am more interested in Image processing in scala. Iam doing project in eclipse environment from http://www.scala-lang.org/download/2.11.0-M5.html but i couldn't find any resource to do image processing in scala . please provide me all information i.e How to install image processing package till manuals of the package to read and write image. I have tried Maven ,jmagic,opencv ,javacv etc but couldn't succeeded. Please reply with in hours my job is at stake. Mayank

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• Scala on the CLR

  - by Michal Bendowski

  The Scala homepage says that Scala 1.4 was runnable on the .NET framework - what is the status of Scala on the CLR now? Is anyone working on it? I think it would make a great GUI tool combined with GTK# and Mono...

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• What ORMs work well with Scala?

  - by Clinton R. Nixon

  I'm about to write a Scala command-line application that relies on a MySQL database. I've been looking around for ORMs, and am having trouble finding one that will work well. The Lift ORM looks nice, but I'm not sure it can be decoupled from the entire Lift web framework. ActiveObjects also looks OK, but the author says that it may not work well with Scala. I'm not coming to Scala from Java, so I don't know all the options. Has anyone used an ORM with Scala, and if so, what did you use and how well did it work?

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• Scala model-view-presenter, traits

  - by Ralph

  I am a fan of Martin Fowler's (deprecated) model-view-presenter pattern. I am writing a Scala view class containing several button classes. I would like to include methods to set the action properties of the buttons, to be called by the presenter. A typical code fragment looks like this: private val aButton = new JButton def setAButtonAction(action: Action): Unit = { aButton.setAction(action) } This code is repeated for each button. If Java/Scala had the C preprocessor, I would create a macro to generate this code, given the button name (no lectures on the evils of the C preprocessor, please). This code is obviously very verbose and repetitive. Is there any better way way to do this in Scala, perhaps using traits? Please hold the lectures about scala.swing. I looking for a general pattern here.

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• IS classOf[] in scala 2.8 different from 2.7?

  - by redtank

  I have an interface from java public class IJava { ... public java.lang.Class getType(); ... } It is inherited in Scala class CScala { def getType() = classOf[Foo] } it worked in scala 2.7.7. But in 2.8.0.RC1, i get type mismatch; found : java.lang.ClassFoo required: java.lang.Class How do i get java.langClass in Scala 2.8

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