val donuts1: Set[String] = Set("Plain Donut", "Strawberry Donut", "Glazed Donut")
val donuts2: Set[String] = Set("Plain Donut", "Chocolate Donut", "Vanilla Donut")
// find the common elements between two Sets using intersect function
val inter = donuts1 intersect donuts2
// find the common elements between two Sets using & function
val common = donuts1 & donuts2
两个集合的交集,那就只有一个,所以输出结果如下。
scala> val inter = donuts1 intersect donuts2
inter: scala.collection.immutable.Set[String] = Set(Plain Donut)
scala> val common = donuts1 & donuts2
common: scala.collection.immutable.Set[String] = Set(Plain Donut)