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  1. object Main extends App {
  2.  
  3. 	sealed trait Fruit
  4.  
  5. 	case class Apple(id: Int, sweetness: Int) extends Fruit
  6.  
  7. 	case class Pear(id: Int, color: String) extends Fruit	
  8.  
  9.     val fruit = Set(Apple(1, 1), Pear(1, "Green"), Apple(2, 2), Pear(2, "Yellow"))
  10.     val grouped = fruit.groupBy(_.getClass)
  11.  
  12.     println(grouped.keys.map(_.getSimpleName).mkString(", "))
  13.     println(grouped.values.map(_.size).mkString(", "))
  14. }
Success #stdin #stdout 0.39s 382144KB
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Apple, Pear
2, 2
https://ideone.com/M4N0Pd
language:
Scala (scala 2.12.8)
created:
9 years ago
visibility:
public

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