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  1. object Main extends App {
  2.     val listOfLists = List(List(1, 2, 3), List(10, 20))
  3. 	val cartesianProduct = listOfLists.foldRight(List(Nil): List[List[Int]])((l1, l2) =>
  4. 	  l1.flatMap(i =>
  5. 		l2.map(l => i :: l)
  6. 	  )
  7. 	)
  8.  
  9. 	println(cartesianProduct) // [[1, 10], [1, 20], [2, 10], [2, 20], [3, 10], [3, 20]]
  10. }
Success #stdin #stdout 0.39s 381952KB
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List(List(1, 10), List(1, 20), List(2, 10), List(2, 20), List(3, 10), List(3, 20))
https://ideone.com/rrmVlC
language:
Scala (scala 2.12.8)
created:
9 years ago
visibility:
public

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