val result =
((fruit.tail foldLeft (new StringBuilder(fruit.head))) {(acc, e) => acc.append(", ").append(e)}).toString

object Solution413 extends Application {

val fruit = "Apple" :: "Banana" :: "Carrot" :: Nil

val result =
((fruit.tail foldLeft (new StringBuilder(fruit.head))) {(acc, e) => acc.append(", ").append(e)}).toString

println(result)
}

val result = fruit.mkString(",")

object Solution414 extends Application {

val fruit = "Apple" :: "Banana" :: "Carrot" :: Nil

val result = fruit.mkString(",")

println(result)
}

val fruit = List[String]("Apple", "Banana", "Carrot")
println(fruit.mkString(", "))

object SolutionXX extends Application {
val fruit = List[String]("Apple", "Banana", "Carrot")
println(fruit.mkString(", "))
}