偏函数

src/main/scala/top/fjy8018/scala/PartitalFunctionApp.scala

@@ -0,0 +1,29 @@
+package top.fjy8018.scala
+
+import scala.util.Random
+
+/**
+  * 偏函数：被包在花括号内没有match的一组case语句
+  *
+  * F嘉阳
+  * 2019-01-03 10:42
+  */
+object PartitalFunctionApp extends App {
+
+
+  val names = Array("A","B","C")
+  val name = names(Random.nextInt(names.length))
+  name match {
+    case "A" => "AAAAAAAA"
+    case "B" => "BBBBBBBB"
+    case _ => "CCCCCCCC"
+  }
+  // -A 输入参数类型 -B 输出参数类型
+  def say:PartialFunction[String,String]={
+    case "A" => "AAAAAAAA"
+    case "B" => "BBBBBBBB"
+    case _ => "CCCCCCCC"
+  }
+
+  println(say("A"))
+}