case

package graphx
import scala.util.Random
object case01 {
  def main(args: Array[String]): Unit = {

    //TODO 简单匹配，值匹配：
    val booleans = List(true,false)
    for(bool <- booleans){
      bool match{
        case true=>println("heads")
        case false=>println("tails")
        case _=>println("no")
      }
    }

    val randomInt: Int = new Random().nextInt(10)
    randomInt match{
      case 7=>println("luncky")
      case _=>println("unlucky")
    }


    //TODO 类型匹配
    val sundries  = List(23,"HELLO",8.5,'Q')
    for(sundry<-sundries){
      sundry match {
        case i:Int=>println("got a Interger")
        case s:String=>println("got a String")
        case f:Double=>println("got a Double")
        case other=>println("got other thing")
     }
    }


    //TODO 根据顺序匹配
    val willWork  = List(1,3,23,90)
    val willNotWork = List(4, 18, 52)
    val empty = List()
    val lists = List(willWork,willNotWork,empty)
    println(lists.length)

    for(l<-lists){
      l match{
        case List(_,3,_,_)=>println("Four elements, with the 2nd being '3'")
        case List(_*)=>println("Any other list with 0 or more elements")
      }
    }

    //TODO 数组匹配
    val tupA = ("Good", "Morning!")
    val tupB = ("Guten", "Tag!")
     val tuples = List(tupA,tupB)
    for(tup<-tuples){
      tup match{
        case(thingone,thingtwo) if thingone=="Good"=>println("A two-tuple starting with 'Good'")
        case(thingone,thingtwo)=>println("This has two things")
      }
    }



    //TODO 对象深度匹配
    case class Person(name: String, age: Int)
    val alice = new Person("Alice", 25)
    val bob = new Person("Bob", 32)
    val charlie = new Person("Charlie", 32)
    val persons = List(alice,bob,charlie)
    for(person<-persons){
      person match{
        case Person("Alice", 25)=>println("hi Alice")
        case Person("Bob", 32) => println("Hi Bob!")
        case Person(name, age) =>println("Who are you")
      }
    }






  }

}