Scala programming (1)

Checksumaccumulator. Scala

import scala.collection.mutable.Mapclass ChecksumAccumulator {  private var sum = 0  def add(b: Byte) { sum += b }  def checksum(): Int = ~(sum & 0xFF) + 1}object ChecksumAccumulator {  private val cache = Map[String, Int]()  def calculate(s: String): Int =  if (cache.contains(s))    cache(s)  else {    val acc = new ChecksumAccumulator    for (c <- s)      acc.add(c.toByte)    val cs = acc.checksum()    cache += (s -> cs)    cs  }}

Summer. Scala

import ChecksumAccumulator.calculateobject Summer {  def main(args: Array[String]) {    for (arg <- args)      println(arg +": "+ calculate(arg))  }}

 

$ Scalac summer. Scala checksumaccumulator. Scala

$ Scala summer of love

Program output:

Of:-213.

Love:-182

Scala programming (1)