Pattern matching a String as Seq[Char]

Question

In Scala it is possible formulate patterns based on the invididual characters of a string by treating it as a Seq[Char].

An example of this feature is mentioned in

Answer 1

I'm going to echo everything that andri said. For interoperability, Scala strings are java.lang.Strings. In Predef, there's an implicit conversion from String to RichString, which implements Seq[Char].

A perhaps nicer way of coding the pattern match, without needing an intermediate val z to hold the Seq[Char]:

def containsScala(x: String): Boolean = {
  (x: Seq[Char]) match {
    ...
  }
}