CODEWITHSUNDEEP
kotlintransform
J_Strauton
J_Strauton

Reputation: 2418

Transform a List of One Type To Another

I have a list of type A. I want to turn it into a list of type B. 

fun publish(listOne: List<A>) {
    val result: List<B> = 
}

Class B looks like this. It has a constructor that if you pass A then it will copy the variables and make a new instance of B.

class B(name: String ....) {

    constructor(a: A) {
       // copies the values of a then creates an instance.
    }
}

How can I use this constructor to make a new list of type B? Normally I would traverse the entire list of and make a new instance of B per instance of A. However, is there a way to do this in Kotlin that is easy?

Upvotes: 1

Views: 435

Answers (1)

jsamol
jsamol

Reputation: 3232

You can just map the given list:

val result: List<B> = listOne.map(::B)
// or
val result: List<B> = listOne.map { B(it) }

Upvotes: 3

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