gistfile1.scala

import scala.util.Random
import scala.collection.mutable

val data = List(List("t1", "ar1", "al1"), // track 1 and corresponding artist, album
                List("t2", "ar2", "al2"), //       2          ''
                List("t3", "ar3", "al3"), //       3          ''
                List("t4", "ar4", "al4"), //       4          ''
                List("t5", "t5",  "al5"), //       5, the artist is missing so we randomly picked track in its place
                List("t6", "ar6", "ar6")) //       6, the album is missing so we randomly picked artist in its place

// This outputs the three CJ randomized of input playlist
val output = data
  .map( l => Random.shuffle(l) )
  .transpose
  .map(_.mkString(" "))
  .to[mutable.ListBuffer]

val buggy = "1"
if (buggy == "1")
  output ++= List("I am buggy")

output // return output