kotlin merge list of map-CodePudding

I want to group by id.

[
    {
        "id": 1,
        "name": "a"
    },
    {
        "id": 2,
        "name": "b"
    },
    {
        "id": 3,
        "name": "c"
    }
]

The results should be as follows:

{
    "1": "a",
    "2": "b",
    "3": "c"
}

What is the most idiomatic way of doing this in Kotlin?

CodePudding user response：

Your question only shows JSON, so I'm not sure if this is about JSON serialization or Kotlin. Since it's tagged kotlin, I'm assuming you're already deserializing the initial list to Kotlin with something like this

data class NamedThing(val id: Int, val name: String)

val list: List<NamedThing> = TODO("somehow you're getting a list of those here")

If you already have this, you can easily create a map from this list using:

val map = list.associate { it.id to it.name }