Scala正则表达式提取器
示例
具有分组部分的正则表达式可以用作提取器：
scala> val address = """(.+):(\d+)""".r address: scala.util.matching.Regex = (.+):(\d+) scala> val address(host, port) = "some.domain.org:8080" host: String = some.domain.org port: String = 8080
请注意，如果不匹配，MatchError则会在运行时抛出a：
scala> val address(host, port) = "something not a host and port" scala.MatchError: something not a host and port (of class java.lang.String)