partition
Splits the original char sequence into a pair of char sequences, where first char sequence contains characters for which predicate yielded true, while second char sequence contains characters for which predicate yielded false.
inline fun CharSequence.partition(predicate: (Char) -> Boolean): Pair<CharSequence, CharSequence>(source)
fun main() {
val text = "Hello123World456"
val (digits, others) = text.partition { it.isDigit() }
println("Digits : $digits") // 123456
println("Others : $others") // HelloWorld
}