Question

The sketch of what I am trying to do is below

  def printcsv(args: String*) {
    val line = for (arg <- args) {???}
    println(line)
  }

I would like

printcsv(“Hello”, “to”, “world”)

To print

“Hello”,”to”,”world”

I could do this was a lot of imperative contortion however I’m struggling with an elegant solution. It’s important to store in val and not simply print directly to the console.

Answer 1

Is that what you’re looking for?

scala> val args = List("Hello","to","world")
args: List[java.lang.String] = List(Hello, to, world)

scala> val csv = args.mkString(",")
csv: String = Hello,to,world

scala> print(csv)
Hello,to,world

If you need quotes in result, you can do something like this before mkString:

scala> args.map('"'+_+'"')
res14: List[java.lang.String] = List("Hello", "to", "world")