带参数的Scala提取器

object ExtractorExample {
  // 定义一个带参数的提取器
  def extractData(data: String, key: String): Option[String] = {
    val keyValuePairs = data.split(",").map(_.trim.split("=")).toMap
    keyValuePairs.get(key)
  }

  def main(args: Array[String]): Unit = {
    val data = "name=John,age=30,city=New York"
    
    // 使用提取器提取数据
    extractData(data, "name") match {
      case Some(name) => println(s"Name: $name")
      case None => println("Name not found")
    }
    
    extractData(data, "age") match {
      case Some(age) => println(s"Age: $age")
      case None => println("Age not found")
    }
    
    extractData(data, "country") match {
      case Some(country) => println(s"Country: $country")
      case None => println("Country not found")
    }
  }
}

def extractData(data: String, key: String): Option[String] = {
  println(s"Data: $data, Key: $key") // 调试信息
  val keyValuePairs = data.split(",").map(_.trim.split("=")).toMap
  keyValuePairs.get(key)
}

extractData(data, "country") match {
  case Some(country) => println(s"Country: $country")
  case None => println("Country not found")
}