Returns the largest value according to the provided comparator among all values produced by selector function applied to each element in the sequence or null if the sequence is empty.
If multiple elements produce the maximal value, this function returns the first of those values.
The operation is terminal.
import kotlin.math.* import kotlin.test.* fun main() { //sampleStart data class Book(val title: String, val publishYear: Int, val rating: Double) // A custom Comparator that orders strings by their length val lengthComparator = compareBy<String> { it.length } // The longest and shortest book titles val books = listOf( Book("Red Sand", 2004, 3.5), Book("Silver Bullet", 2009, 4.4), Book("Clear Water", 2018, 4.1), Book("Night Sky", 2023, 3.8) ) println(books.maxOfWith(lengthComparator) { it.title }) // Silver Bullet println(books.minOfWith(lengthComparator) { it.title }) // Red Sand val emptyList = listOf<Book>() // maxOfWith() and minOfWith() throw if the collection is empty // emptyList.maxOfWith(lengthComparator) { it.title } // will fail with NoSuchElementException // emptyList.minOfWith(lengthComparator) { it.title } // will fail with NoSuchElementException // maxOfWithOrNull() and minOfWithOrNull() return null if the collection is empty println(emptyList.maxOfWithOrNull(lengthComparator) { it.title }) // null println(emptyList.minOfWithOrNull(lengthComparator) { it.title }) // null //sampleEnd }xxxxxxxxxxdata class Book(val title: String, val publishYear: Int, val rating: Double)// A custom Comparator that orders strings by their lengthval lengthComparator = compareBy<String> { it.length }// The longest and shortest book titlesval books = listOf(Book("Red Sand", 2004, 3.5),Book("Silver Bullet", 2009, 4.4),Book("Clear Water", 2018, 4.1),Book("Night Sky", 2023, 3.8))println(books.maxOfWith(lengthComparator) { it.title }) // Silver Bulletprintln(books.minOfWith(lengthComparator) { it.title }) // Red Sandval emptyList = listOf<Book>()// maxOfWith() and minOfWith() throw if the collection is empty// emptyList.maxOfWith(lengthComparator) { it.title } // will fail with NoSuchElementException// emptyList.minOfWith(lengthComparator) { it.title } // will fail with NoSuchElementException// maxOfWithOrNull() and minOfWithOrNull() return null if the collection is emptyprintln(emptyList.maxOfWithOrNull(lengthComparator) { it.title }) // nullprintln(emptyList.minOfWithOrNull(lengthComparator) { it.title }) // null
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