mapTo
Applies the given transform function to each character of the original char sequence and appends the results to the given destination.
@IgnorableReturnValueinline fun <R, C : MutableCollection<in R>> CharSequence.mapTo(destination: C, transform: (Char) -> R): C(source)
fun main() {
val source: CharSequence = "Hello"
val asciiCodes = mutableListOf