def deconstructList(xs: List[Int]): List[Int] = xs match
case Nil => Nil
// Deconstruct a list into head and tail using the cons :: operator.
// Then, reverse order by concatenating head to tail.
case y :: ys => deconstructList(ys) ++ List(y)
deconstructList(List(1, 2, 3, 4))
// res0: List[Int] = List(4, 3, 2, 1)- 20 min
In the first part of this 3-article series, we introduced the concepts of columnar file formats & row-based file formats. We also…