minWith

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

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

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

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

val youngest = people.minWith(compareBy<Person> { it.age })
println("Youngest: ${youngest.name}, age ${youngest.age}")

Source