Why scala's pattern maching does not work in for loops for type matching?

Question

I\'m coding against an API that gives me access to remote file system. The API returns a list of files and directories as list of node objects (parent to file and directory)

Answer 1

This is the long-standing issue 900 and has been discussed many times before. The common workaround is to use something like:

for (y@(_y:String) <- listOfBaseObjects) {
    println(y)
}

A nicer version is provided by Jason Zaugg in the comments to the above-mentioned ticket:

object Typed { def unapply[A](a: A) = Some(a) }

for (Typed(y : String) <- listOfBaseObjects) {
    println(y)
}