scala> var a = "mysql  "a: String = "mysql  "scala> a.trim()res14: String = mysqlscala> a.stripSuffix("l")res15: String = "mysql  "scala> a.stripSuffix("l ")res16: String = "mysql  "scala> a.stripSuffix("l  ")res17: String = mysqscala> a.stripPrefix("my")res18: String = "sql  "