How to use "Pair" in Kotlin dataclass-CodePudding

I have variableA and variableB. I would like to implement Arraylist(pair<variableA, variableB>) in Kotlin data class. Ofcourse, I can use Arraylist of another class contains variableA and variableB.

data class Database(
    val rfHandler: ArrayList<RfHandler> = ArrayList(),
    val btThread: ArrayList<BTThread> = ArrayList(),
)

It would be beter if some could suggest other better way if any.

CodePudding user response：

Did you try using Pair data structure? (One in AndroidX Pair and other in Kotlin Pair)

val pairlist = ArrayList<Pair<RfHandler, BTThread>>()

CodePudding user response：

You could construct your class as:

data class Database(val list: ArrayList<Pair<RfHandler, BTThread>>)

Or if you would like to make your class itself be a pair, then you could extend it like so:

data class Database(
    val rfHandler: ArrayList<RfHandler> = ArrayList(),
    val btThread: ArrayList<BTThread> = ArrayList(),
): Pair<ArrayList<RfHandler>, ArrayList<BTThread>>(rfHandler, btThread)