partition
Splits the original array into a pair of lists, where first list contains elements for which predicate yielded true, while second list contains elements for which predicate yielded false.
inline fun <T> Array<out T>.partition(predicate: (T) -> Boolean): Pair<List<T>, List<T>>(source)
fun main() {
val numbers = arrayOf(1, 2, 3, 4, 5, 6)
val (evens, odds) = numbers.partition { it % 2 == 0 }
println("Evens: $evens") // [2, 4, 6]
println("Odds: $odds") // [1, 3, 5]
}