inline fun <R> CharSequence.map(
    transform: (Char) -> R
): List<R>

Returns a list containing the results of applying the given transform function to each character in the original char sequence.

import kotlin.test.*

fun main(args: Array<String>) {
//sampleStart
val string = "kotlin"
println(string.map { it.toUpperCase() }) // [K, O, T, L, I, N]
//sampleEnd
}