cjones-20090616-0.txt

Blog Title:  A Functional Refactoring in Scala
Author:      Colin Jones
Date:        June 16th, 2009

cjones-20090616-1.scala

def printUpTo(limit: Int): Unit = 
{
  var i = 0
  while(i <= limit)
  {
    println("i = " + i)
    i += 1
  }
}

cjones-20090616-2.scala

void printUpTo(int limit)
{
  for(int i = 0; i <= limit, i++)
  {
    System.out.println("i = " + i)
  }
}

cjones-20090616-3.scala

def printUpTo(limit: Int): Unit = {
  for(i <- (0 to limit)) {
    println("i = " + i)
  }
}

cjones-20090616-4.scala

def printUpTo(limit: Int): Unit = {
  (0 to limit).foreach {
    i => println("i = " + i)
  }
}

cjones-20090616-5.scala

def printUpTo(limit: Int): Unit = {
  applyUpTo(limit, println)
}

def applyUpTo(limit: Int, action: String => Unit): Unit = {
  (0 to limit).foreach {
    i => action("i = " + i)
  }
}

cjones-20090616-6.scala

def printUpTo(limit: Int): Unit = {
  buildUpTo(limit).foreach(println)
}

def buildUpTo(limit: Int): Iterable[String] = {
  (0 to limit).map("i = " + _)
}