If I have a `Map<String, JsonObject>` is the...

# serialization

[dave08]

If I have a Map<String, JsonObject> is there any way to easily modify one of the entry's value in the JsonObject ?

[dave08]

I'd suppose there's no MutableJsonObject...? But maybe a more efficient plus operator implementation to merge two JsonObjects?

[Desmond van der Meer]

JsonObject implements Map and is just a wrapper around a Map. So you could do something like

val merged = JsonObject(previousJsonObject + mapOf("key" to JsonPrimitive("value")))

[Desmond van der Meer]

Or previousJsonObject.toMutableMap() , then modify that map and finally create a new JsonObject again that wraps the mutable map.

[ephemient]

fyi there's a Map.plus(Pair) overload

[dave08]

Thanks! That all sounds very good!

[Adam S]

There’s a helper function buried in KxS that you can copy-paste, and maybe make an issue asking that they make it public… https://github.com/Kotlin/kotlinx.serialization/blob/33104957873448189eb242413646b58883623e0a/formats/json-tests/commonTest/src/kotlinx/serialization/features/MetaSerializableJsonTest.kt#L30-L35