minOf

Returns the smallest value among all values produced by selector function applied to each element in the sequence.

inline fun <T> Sequence<T>.minOf(selector: (T) -> Double): Double(source)

data class Product(val name: String, val price: Double)

fun main() {
    val products = listOf(
        Product("Apple", 1.99),
        Product("Banana", 0.99),
        Product("Cherry", 2.49)
    ).asSequence()

    val cheapestPrice = products.minOf { it.price }
    println("Cheapest price: $cheapestPrice")
}

Source