URL parameter parsing

gistfile1.scala

val Param = """(.+)=(.+)""".r

def params(parameters: String): Map[String, String] = {
  (parameters split "\\?") match {
    case Array(path, queryString) =>
      val kvs = (queryString split "&").toList collect {
        case Param(key, value) => key -> value
      }
      kvs.toMap

    case _ => Map()
  }
}


// Tests
assert(params("?q=query&r=result&s=stuff") == Map("q" -> "query", "r" -> "result", "s" -> "stuff"))

assert(params("http://www.gu.com/") == Map())
assert(params("http://www.gu.com?q=query&r=result&s=stuff") == Map("q" -> "query", "r" -> "result", "s" -> "stuff"))
assert(params("?q=query&r=result&s=stuff") == Map("q" -> "query", "r" -> "result", "s" -> "stuff"))