minWith

Returns the first element having the smallest value according to the provided comparator.

@JvmName(name = "minWithOrThrow")fun <T> Array<out T>.minWith(comparator: Comparator<in T>): T(source)

data class Person(val name: String, val age: Int)

val people = arrayOf(
    Person("Alice", 30),
    Person("Bob", 25),
    Person("Charlie", 35)
)

val youngest = people.minWith(Comparator { p1, p2 -> p1.age - p2.age })
println("Youngest: ${youngest.name}, Age: ${youngest.age}")

Source