How to remove a substring between two specific characters in Scala

Question

I have this List in Scala:

List[String] = List([[aaa|bbb]], [[ccc|ddd]], [[ooo|sss]])

And I want to obtain the same List with the substrings between | and ] removed and | removed too.

So the result would be:

List[String] = List([[aaa]], [[ccc]], [[ooo]])

I tried something making a String with the List and using replaceAll, but I want to conserve the List.

Thanks.

Answer 1

Here is a simple solution that should be quite good in performance:

val list = List("[[aaa|bbb]]", "[[ccc|ddd]]", "[[ooo|sss]]")
list.map(str => str.takeWhile(_ != '|') + "]]" )

It assumes that the format of the strings is:

• Two left square brackets [ at the beginning,
• then the word we want to extract,
• and then a pipe |.