AnagramCounte.scala

class AnagramsCounter {
 private val map = scala.collection.mutable.HashMap.empty[String, Int]

  private def charBuffer() = Array.fill[Int](256)(0)

  private def getValue(key: String) = map.getOrElse(key, 0)
  private def insert(key: String) = map += (key -> (getValue(key) + 1))

  def parse(input: String) {
    var letters = charBuffer()
    input.foreach {
      case ' ' => insert(letters.mkString); letters = charBuffer()
      case l   => letters(l.toLower) += 1
    }
    insert(letters.mkString)
  }

  def count(word: String) = {
    val letters = charBuffer()
    word.foreach(l => letters(l.toLower) += 1)
    getValue(letters.mkString)
  }
}