元組使用：

<span style="font-size:18px;"> val pair = (1,"Hi")
scala> print(pair._1)
1
</span>

集(set)和對映(map)

<span style="font-size:18px;">val treasureMap = Map[Int,String]()
treasureMap += (1 -> "Hello")
treasureMap += （2，“world”） //這種方式它內部會隱義轉換為2 -> "world" 這種形式</span>

檔案操作

<span style="font-size:18px;">import scala.io.Source

def widthOfLength(s : String) = s.length.toString.length
def lengthOfLine(s:String) = s.toString.length

if (args.length>0){
  val lines = Source.fromFile(args(0)).getLines.toList  //把檔案轉化list並存在記憶體中
  val longestLine = lines.reduceLeft((a,b) => if(a.length>b.length) a else b)

  val maxWidth = widthOfLength(longestLine)
  val maxLength = lengthOfLine(longestLine)
  val sparkWidth = maxLength+maxWidth+2
  println("*"*(sparkWidth))
  for(line <- lines){
    val numSpaces = maxWidth-widthOfLength(line)
    val padding = " " * numSpaces
    val paddingLast = " "*(sparkWidth-maxWidth-line.length-2)
    println(padding+line.length + "|"+line+paddingLast+"*")
  }

  println("*"*(sparkWidth))
}
</span>