Yuichiroh

def withPrintWriter(file: String)(op: PrintWriter => Unit) {
  val writer = new PrintWriter(file)
  try op(writer)
  finally writer.close
}

withPrintWriter("out.txt") { w =>
  w.println("anything you want to write")
}

Yuichiroh

val scores = Array(
  Array(1, 2, 3, 4, 5),
  Array(1, 2, 3, 4, 5),
  Array(1, 2, 3, 4, 5),
  Array(1, 2, 3, 4, 5),
  Array(1, 2, 3, 4, 5)
)

val bests = Array.fill(5)(Array.fill(5)(0))

Yuichiroh

~
% scala -Xshow-phases
    phase name  id  description
    ----------  --  -----------
        parser   1  parse source into ASTs, perform simple desugaring
         namer   2  resolve names, attach symbols to named trees
packageobjects   3  load package objects
         typer   4  the meat and potatoes: type the trees
        patmat   5  translate match expressions
superaccessors   6  add super accessors in traits and nested classes

Yuichiroh

scala> for(i <- 0 to 5) yield { i + 1 }
[[syntax trees at end of                    parser]] // <console>
package $line3 {
  object $read extends scala.AnyRef {
    def <init>() = {
      super.<init>();
      ()
    };
    object $iw extends scala.AnyRef {
      def <init>() = {

Yuichiroh

~
% scala -Xprint:parser
Welcome to Scala version 2.11.4 (Java HotSpot(TM) 64-Bit Server VM, Java 1.8.0_25).
Type in expressions to have them evaluated.
Type :help for more information.

scala> [[syntax trees at end of                    parser]] // <init>
package <empty> {
  class $repl_$init extends scala.AnyRef {
    def <init>() = {

Yuichiroh

println("This is what I want to say.")
Console.err.println("standard error")

Console.withOut(new PrintStream("out.txt")) {
  println("anything you want to write")
  Console.out.close()
}

Console.out.println("Hi. I'm stdin again!")