Nrthugu

I have the following string:

val str = "tagged.big AND tagged.medium"

I need to implement regex that will find all assurance of tagged. till the first whitespace or the end of the line. In the current str I expect to extract 2 strings:

tagged.big

tagged.medium

This is my current attempt:

val pattern = "tagged.*\s".r

but it returns:

Some(tagged.big AND )

Could you please show the proper regexp for this case?

The pattern tagged.S+ should work here. This would match tagged. followed by one or more whitespace characters. Here is a demo:

Demo

This is how I would write the pattern. The problem with your current pattern is that the .* is greedy, and will keep consuming as much as possible before hitting a whitespace character. Also, in the case of the final match, tagged.medium, there is no whitespace character which occurs after it. So, we could try using this:

tagged.*?(?=s|$)

This also works.

Expanding on @Tim Biegeleisen's Regex solution, here's one way to extract the substrings:

val str = "tagged.big AND tagged.medium"



val pattern = """(tagged.S+)""".r



pattern.findAllIn(str).matchData.flatMap(_.subgroups).toList

// res1: List[String] = List(tagged.big, tagged.medium)