x | } res0: List[Int] = List(1), 2.scala> List(1, "1") map { | case x: Int => x | case y: String => y.toInt | }, 3.scala> List(1, "1") filter { | case x: Int => true | case _ => false | }, 4.All of the above">

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Scala MCQs

Which one of the following code example of Scala collection type for filter is correct?

scala> List(1, "1") collect { | case x: Int => x | } res0: List[Int] = List(1)

scala> List(1, "1") map { | case x: Int => x | case y: String => y.toInt | }

scala> List(1, "1") filter { | case x: Int => true | case _ => false | }

All of the above

Answer

Correct Answer: scala> List(1, "1") collect { | case x: Int => x | } res0: List[Int] = List(1)

Explanation:

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