2020-11-14-Scala-34(scala中文版的摘录3)

正文

1.隐式转化的注意事项

2.for的探索

object Test6 {
  def main(args: Array[String]): Unit = {
         var list = List[People](new People("小明",12)
         ,new People("貂蝉",19),new People("吕布",22)
         ,new People("刘备",22))
        //for循环中的生成器 定义 过滤器
       var  result =  for (index <- list ; n = index.name ; if n.startsWith("刘") ) yield  n
       println(result)
       
  }
}
class People(val name:String, val age:Int)

3.抽取器和样例类的选择