Answer 1

This code will extend and provide working methods.

// rand function for shuffled.
import java.util.Random
val random = Random()
fun rand(from: Int, to: Int) = random.nextInt(
    to-from)+from

// Extend Iterable<Int> with a shuffled function.
fun Iterable<Int>.shuffled(): List<Int> {
    var count = this.count()
    var list = MutableList(count, {-1})
    for (loop in 0 until count) {
        var index = rand(0, count-1)
        while (list[index] != -1)
            index = (index+1)%count
        list[index] = loop
    } // for
    for (loop in 0 until count)
        list[loop] = this.elementAt(list[loop])
    return list.toList()
} // shuffled

// Extend Interable<String> with chunked.
fun Iterable<String>.chunked(size: Int): List<List<String>> {
    var count = this.count()
    val outer = (count+size-1)/size
    return List(outer, {index -> List(
        if (count > size) {
            count -= size
            size
        } else
            count, {this.elementAt(index*size+it)})})
} // chunked

Answer 2

Just FYI, your suggestion/request has been logged. Thanks for providing feedback.