Concatenate elements on a list separated by a character

Asked May 03 '21 at 12:39

Active May 03 '21 at 12:39

Viewed 30 times

I have the following list:

val aList: Seq[String] = List("A", "B", "C", "D", "E")

I want to return the string: "A-B-C-D-E". The following code does it:

aList.map(_ + "-").fold("")(_ + _).dropRight(1)

But as you can see, with the map and the fold operations, I need to drop the last "-" character at the end. I'm wondering if there is a way to do it on a way that is simpler and more direct (without using the dropRight function).

Any help would be appreciated.

asked May 03 '21 at 12:39

yet_another_programmer

2

You can just do this: `aList.iterator.mkString("-")` – Jesper May 03 '21 at 12:48
2

@Jesper the `iterator` is unnecessary in this case. – Luis Miguel Mejía Suárez May 03 '21 at 13:34
aList.mkString("-") // res12: String = A-B-C-D-E – mvasyliv May 03 '21 at 13:48

Concatenate elements on a list separated by a character

0 Answers0