// 偏函数
/**
* PartialFunction[A, B], A 是参数类型， B 是返回值类型，PartialFunction 常用于模式匹配
*/
object PartialFunctionDemo {
// String 参数类型，Int返回类型
def m1: PartialFunction[String, Int] = {
case "one" => {
println(" case 1")
1
}
case "two" => {
println("case 2")
2
}
}
def m2(num: String) : Int = num match {
case "one" => 1
case "two" => 2
case _ => 0
}
def main(args: Array[String]): Unit = {
println(m1("one"))
println(m2("two"))
}
}
转载于:https://www.cnblogs.com/sunnystone85/p/11363681.html
