Scala 学习笔记

 1 object StockService{
 2      def process(input:String){
 3           input match{
 4                case Symbol() => println("Yes," + input)
 5                case _ => println("Invalid input " + input)
 6           }
 7      }
 8 }
 9 object Symbol{
10      def unapply(symbol: String):Boolean = symbol == "GooG" || symbol == "IBM"
11 }
12 object test extends App{
13           StockService process "GooG"
14           StockService process "IBM"
15           StockService process "ERR"
16 }