Scala模式匹配-列表中包含字符串的子集

Question

我想將姓氏在名字中的人的名字作為子集。

以下無效

val names = List("Smith","Adams","Crawford")
val people =List("Billy Jean","Will Morten","Lenhardt Peterson","Lauryn Crawford","George Smith","Priscilla Adams")

people.filter(p=> names.exists(p.name.contains))

Answer 1

天真而不是最有效的解決方案：

val names = Set("Smith","Adams","Crawford")
val people = List("Billy Jean","Will Morten",
                  "Lenhardt Peterson","Lauryn Crawford", 
                  "George Smith","Priscilla Adams")

people.filter(x => names.contains(x.split(" ").lastOption.getOrElse("")))
      .foreach(println)

結果是：

Lauryn Crawford
George Smith
Priscilla Adams

Answer 2

姓氏以各種令人困惑的配置出現。

val names = List("Smith","von Braun","Jones","de Kooning")
val people =List("Billy Jean","Will Morten","Lenhardt Peterson",
  "Lauryn Crawford","George Smith","Priscilla Adams",
  "Wernher von Braun", "Diederik Arnoldus De Beer", "Willem de Kooning")

names.flatMap(n => people.find(_.matches(s".* $n")))
// res0: List[String] = List(George Smith, Wernher von Braun, Willem de Kooning)