Scala has a neat built-in function that turns a string into a regular expression (.r). If you use it on a regular expression with slashes in it, you’ll get errors like so:
:1: error: invalid escape character "\w+".r ^
Thus for many regexes, it is preferable to use the multi-line string syntax, as this skips the escaping.
scala> """\w+""".r res43: scala.util.matching.Regex = \w+
From this, we can do some neat things, like find the first word in a sentence:
x.findFirstMatchIn("abc def") res44: Option[scala.util.matching.Regex.Match] = Some(abc)
We can also replace all matches in the string, so if we want to swap one word for another, we can:
x.replaceAllIn("abc def", "gary") res46: String = gary gary