Why does the same scala code work fine on the command line and not in Intellij?
Below is a very simple code scala
( upper.scala
):
/**
* Created on 7/6/2015.
*/
class Upper {
def upper(strings: String*): Seq[String] = {
strings.map((s: String) => s.toUpperCase())
}
}
val up = new Upper
println(up.upper("Hello World!"))
Execute it on the command line, it's ok:
[root@Fedora ~]# scala upper.scala
ArrayBuffer(HELLO WORLD!)
But when you run the command with the "Scala console" command, Intellij
it throws the following error:
Error:(10, 1) expected class or object definition
val up = new Upper
^
Error:(11, 1) expected class or object definition
println(up.upper("Hello World!"))
^
Screenshot Like: 
Could anyone please give some insight on this issue?
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You define a value and call a function right inside a file (assembly block), which is not allowed in Scala. It worked in the REPL because it just implicitly wraps it in some default object like:
object $iw {
class Upper {
def upper(strings: String*): Seq[String] = {
strings.map((s: String) => s.toUpperCase())
}
}
val up = new Upper
println(up.upper("Hello World!"))
}
Your approach will also not work with the usual scalac
one if you are looking for a clean check.
Solution: just use App
which will automatically generate a method main
so you can run the code:
object MyApp extends App {
val up = new Upper
println(up.upper("Hello World!"))
}
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I think this is a problem for scala scripts in intellij, one way to run these scripts is a little more complicated. From my point of view, create and an object that extends and the app builds a scala app, not a scala script
First remove the make element in the config:
Then start scala console
Next, you have to select the code and send to the console
and finally you can see the result in the console
I hope this works, for running your script code without creation and application
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