How do i convert a JArray[String] to Scala List

Asked Apr 22 '21 at 11:14

Active Apr 22 '21 at 11:39

Viewed 531 times

I am struggling to convert a Jarray[JString] to Scala List[String]

scala> (configMap \ "orderedCols").extract[JArray]
  res27: org.json4s.JArray = JArray(List(JString(id), JString(name)))

 scala> (configMap \ "orderedCols").extract[JArray].toList
 <console>:40: error: value toList is not a member of org.json4s.JArray
   (configMap \ "orderedCols").extract[JArray].toList

Can someone help me ^ Expected output : List("id","name")

edited Apr 22 '21 at 11:39

Levi Ramsey

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asked Apr 22 '21 at 11:14

Surender Raja

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To take a `List` from `JArray` you should use `arr`. (you can find some examples [here](https://json4s.org/)) – gianluca aguzzi Apr 22 '21 at 13:19
ok. I will try this – Surender Raja Apr 27 '21 at 12:15
BEWARE: Json4s is [vulnerable under DoS/DoW attacks](https://github.com/json4s/json4s/issues?utf8=%E2%9C%93&q=is%3Aissue+is%3Aopen+denial)! – Andriy Plokhotnyuk Nov 16 '21 at 17:24

How do i convert a JArray[String] to Scala List

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