Scala-4.控制结构-break和continue

import util.control.Breaks._

object BreakAndContinueDemo extends App {
  println("\n=== BREAM EXAMPLE ===")
  breakable {
    for (i <- 1 to 10) {
      println(i)
      if (i > 4) break
    }
  }

  println("\n=== CONTINUE EXAMPLE ===")
  val searchMe = "peter piper picked a peck of pickled peppers"
  var numPs = 0
  for (i <- 0 until searchMe.length) {
    breakable {
      if (searchMe.charAt(i) != 'p') {
        break
      } else {
        numPs += 1
      }
    }
  }
  println("Found" + numPs + "p's in the string.")
}

=== BREAM EXAMPLE ===
1
2
3
4
5

=== CONTINUE EXAMPLE ===
Found9p's in the string.

val length = searchMe.count(_ == 'p') 

object LabeledBreakDemo extends App {

  import scala.util.control._

  val Inner = new Breaks
  val Outer = new Breaks

  Outer.breakable {
    for (i <- 1 to 5) {
      Inner.breakable({
        for (j <- 'a' to 'e') {
          if (i == 1 && j == 'c') Inner.break() else println(s"i: $i, j: $j")
          if (i == 2 && j == 'b') Outer.break()
        }
      })
    }
  }