How can I make `MutableList.map{ ... }` to return ...

# getting-started

[tjohnn]

How can I make MutableList.map{ ... } to return MutableList instead of List

[Mark Murphy]

use mapTo() instead of `map()`: https://kotlinlang.org/api/latest/jvm/stdlib/kotlin.collections/map-to.html

[Mark Murphy]

fun main() {
  val original = mutableListOf(1, 2, 3)
  val mapTarget = mutableListOf<String>()
  
  original.mapTo(mapTarget) { (it * it).toString() }
  
  println(mapTarget)
}

[diesieben07]

You can shorten that:
val target = original.mapTo(mutableListOf()) { ... }

[tjohnn]

Thanks