Hi, I have troubles with deploying lift application with uses enterprise java beans. There's a simple example: @Stateless class TestEJB { def a = "hello" } object TestApi extends XMLApiHelper{ @EJB private var bean:TestEJB = _ def createTag(a:NodeSeq) = def dispatch: LiftRules.DispatchPF = { case Req("test" :: Nil, "", GetReque...
I must write daemon and I want to use Models for connecting to the database and some useful Lift classes. Is it possible to run analog of Rails's rake tasks? ...
http://www.scala-ide.org/ gives http://download.scala-ide.org/update-current-35 There are features and plugins directory. Which should I use or both ? Should I just unzip them all in eclipse features and/or plugins directory ? By the way what diff between features and plugins ? ...
Where can I see example of scala.dbc update statement? I have found select statement example only... select fields ( ("url" of characterVarying(32)) and ("name" of characterVarying(32)) and ("last_update" of integer)) from ("feeds") ...
I created scala application and now I want to build jar. I run mvn package than I try to run jar by command java -jar target/burner-1.0-SNAPSHOT.jar and I see error: Failed to load Main-Class manifest attribute from How can I define Main-Class property? Do I need to create Manifest.mf? where? Or I need to have mainclass property some...
Hello, I'm looking for a solution for rewriting urls in lift using list declared outside the scope of LiftRules.statelessRewrite.append LiftRules.statelessRewrite.append { case RewriteRequest(ParsePath("abc" :: Nil, _ , _ , _ ), _ , _ ) => RewriteResponse("index" :: Nil) } I'd like to have the following code working the ...
scala> class A defined class A scala> class B defined class B scala> val a: A = new A a: A = A@551510e8 scala> a match { | case _: B => println("unlikely") | case _ => println("no match") | } no match In the example above shouldn't the compiler tell me that one of the cases can never match? A slightly more complicated...
Hi, suppose you have a Lift + db4o project... How do you define User model? Should I extend MetaMegaProtoUser? Thanks in advance, Etam. ...
scala Welcome to Scala version 2.8.0.final (Java HotSpot(TM) Client VM, Java 1.6.0_20). Type in expressions to have them evaluated. Type :help for more information. scala> import org.scalacheck.Prop.forAll error: error while loading Prop, Scala signature Prop has wrong version expected: 5.0 found:...
I want to write a implicit conversion of Tuple2[A,B] to Seq[C] where C is super type of both A and B. My first try as following: implicit def t2seq[A,B,C](t: (A,B))(implicit env: (A,B) <:< (C,C)): Seq[C] = { val (a,b) = env(t) Seq(a,b) } But it doesn't work: scala> (1,2): Seq[Int] <console>:7: error: type mismatch; found :...
I have a project with mixed Java and Scala sources, following the instructions on this page, which works when running Maven from the command line. However, people using IDEs like IDEA and Netbeans have problems resolving Scala classes in Java code (but not the other way around, thanks to the nice plugins available). Is there a way to r...
I know all of the philosophical arguments against preprocessors and macros in Java. I don't agree that just because some may abuse a language feature, it should be excluded for all. I would like to include __FILE__ and __LINE__ macros in my Java and Scala code for efficient logging. Any use of Exception is unacceptable because of runtim...
Hi, there's a simple form in Lift framework and a Class with render method that handles the form: def render(xhtml:NodeSeq) = { var name = "" var role = "" var human = "" def register = { val person = new Person person.name = name person.role = role person....
I have the following scala code: package dummy import javax.servlet.http.{HttpServlet, HttpServletRequest => HSReq, HttpServletResponse => HSResp} import scala.actors.Actor class DummyServlet extends HttpServlet { RNG.start override def doGet(req: HSReq, resp: HSResp) = { def message = <HTML><HEAD><TITLE>Rando...
I've seen Scala using both interchangeably, but I don't know when to use one or the other. Is there a convention? For instance these are equivalent "hello" toString and "hello".toString() And they can even be mixed "hello".toString() length What's the convention? ...
Could someone please explain package objects, not so much the concept but their usage. I've tried to get an example working and the only form I got to work was as follows: package object investigations { val PackageObjectVal = "A package object val" } package investigations { object PackageObjectTest { def main(args: Array[...
Are there any implementations of a purely functional soft heap data structure in any language? ...
Hello, I was thinking about writing a code generator to generate scala from google protobuf definitions file. The reason I see it valuable is the java bindings are too Java-ish and one could do much better in scala. For example for the following definition message Foo { required int F1 = 1; repeated string F2 = 2; message Inner ( ...
Possible Duplicate: Which IDE for Scala 2.8? I'm learning Scala by reading 'Programming in Scala' book by Odersky et al. What programming environment people use for scala? I've used TextMate and emacs, and trying to use eclipse for Java. ...
Hi, I have an enumeration in scala mapped to strings in JPA. For more comfortable coding, I defined implicit conversions between them. So I now can define value val person.role = "User", - person.role is the enumeration type "User" a String so there's the conversion. But when I try to compare these two, I always get false, because the de...