mapTo
Applies the given transform function to each element of the original array and appends the results to the given destination.
@IgnorableReturnValueinline fun <T, R, C : MutableCollection<in R>> Array<out T>.mapTo(destination: C, transform: (T) -> R): C(source)
val numbers = arrayOf(1, 2, 3, 4)
val words = mutableListOf<String>()
numbers.mapTo(words) { "Number $it" }
println(words) // [Number 1, Number 2, Number 3, Number 4]