kotlin-stdlib/kotlin.collections/minOrNull

minOrNull

fun Array<out Double>.minOrNull(): Double?(source)
fun Array<out Float>.minOrNull(): Float?(source)
fun FloatArray.minOrNull(): Float?(source)
fun DoubleArray.minOrNull(): Double?(source)

Returns the smallest element or null if the array is empty.

If any of elements is NaN, this function returns NaN.

Since Kotlin

1.4

Samples

import kotlin.math.*
import kotlin.test.*

fun main() { 
   //sampleStart 
   // The largest and smallest elements in the array
val numbers = doubleArrayOf(3.0, 7.2, 2.4, 6.5)
println(numbers.max()) // 7.2
println(numbers.min()) // 2.4

// max() and min() return `NaN` if any of elements is `NaN`
val numbersWithNaN = doubleArrayOf(3.0, Double.NaN, 7.2, 2.4, 6.5)
println(numbersWithNaN.max()) // NaN
println(numbersWithNaN.min()) // NaN

val emptyArray = doubleArrayOf()

// max() and min() throw if the array is empty
// emptyArray.max() // will fail with NoSuchElementException
// emptyArray.min() // will fail with NoSuchElementException

// maxOrNull() and minOrNull() return null if the array is empty
println(emptyArray.maxOrNull()) // null
println(emptyArray.minOrNull()) // null 
   //sampleEnd
}
fun <T : Comparable<T>> Array<out T>.minOrNull(): T?(source)

Returns the smallest element or null if the array is empty.

If there are multiple equal minimal elements, this function returns the first of those elements.

Since Kotlin

1.4

Samples

import kotlin.math.*
import kotlin.test.*

fun main() { 
   //sampleStart 
   // The largest and smallest elements according to String.compareTo
val names = listOf("Alice", "Bob", "Carol")
println(names.max()) // Carol
println(names.min()) // Alice

val emptyList = emptyList<Int>()

// max() and min() throw if the collection is empty
// emptyList.max() // will fail with NoSuchElementException
// emptyList.min() // will fail with NoSuchElementException

// maxOrNull() and minOrNull() return null if the collection is empty
println(emptyList.maxOrNull()) // null
println(emptyList.minOrNull()) // null 
   //sampleEnd
}
fun ByteArray.minOrNull(): Byte?(source)
fun ShortArray.minOrNull(): Short?(source)
fun IntArray.minOrNull(): Int?(source)
fun LongArray.minOrNull(): Long?(source)
fun CharArray.minOrNull(): Char?(source)
@ExperimentalUnsignedTypes
fun UIntArray.minOrNull(): UInt?(source)
@ExperimentalUnsignedTypes
fun ULongArray.minOrNull(): ULong?(source)
@ExperimentalUnsignedTypes
fun UByteArray.minOrNull(): UByte?(source)
@ExperimentalUnsignedTypes
fun UShortArray.minOrNull(): UShort?(source)

Returns the smallest element or null if the array is empty.

Since Kotlin

1.4

Samples

import kotlin.math.*
import kotlin.test.*

fun main() { 
   //sampleStart 
   // The largest and smallest elements in the array
val numbers = intArrayOf(3, 7, 2, 6)
println(numbers.max()) // 7
println(numbers.min()) // 2

val emptyArray = intArrayOf()

// max() and min() throw if the array is empty
// emptyArray.max() // will fail with NoSuchElementException
// emptyArray.min() // will fail with NoSuchElementException

// maxOrNull() and minOrNull() return null if the array is empty
println(emptyArray.maxOrNull()) // null
println(emptyArray.minOrNull()) // null 
   //sampleEnd
}
fun Iterable<Double>.minOrNull(): Double?(source)
fun Iterable<Float>.minOrNull(): Float?(source)

Returns the smallest element or null if the collection is empty.

If any of elements is NaN, this function returns NaN.

Since Kotlin

1.4

Samples

import kotlin.math.*
import kotlin.test.*

fun main() { 
   //sampleStart 
   // The largest and smallest elements in the array
val numbers = doubleArrayOf(3.0, 7.2, 2.4, 6.5)
println(numbers.max()) // 7.2
println(numbers.min()) // 2.4

// max() and min() return `NaN` if any of elements is `NaN`
val numbersWithNaN = doubleArrayOf(3.0, Double.NaN, 7.2, 2.4, 6.5)
println(numbersWithNaN.max()) // NaN
println(numbersWithNaN.min()) // NaN

val emptyArray = doubleArrayOf()

// max() and min() throw if the array is empty
// emptyArray.max() // will fail with NoSuchElementException
// emptyArray.min() // will fail with NoSuchElementException

// maxOrNull() and minOrNull() return null if the array is empty
println(emptyArray.maxOrNull()) // null
println(emptyArray.minOrNull()) // null 
   //sampleEnd
}
fun <T : Comparable<T>> Iterable<T>.minOrNull(): T?(source)

Returns the smallest element or null if the collection is empty.

If there are multiple equal minimal elements, this function returns the first of those elements.

Since Kotlin

1.4

Samples

import kotlin.math.*
import kotlin.test.*

fun main() { 
   //sampleStart 
   // The largest and smallest elements according to String.compareTo
val names = listOf("Alice", "Bob", "Carol")
println(names.max()) // Carol
println(names.min()) // Alice

val emptyList = emptyList<Int>()

// max() and min() throw if the collection is empty
// emptyList.max() // will fail with NoSuchElementException
// emptyList.min() // will fail with NoSuchElementException

// maxOrNull() and minOrNull() return null if the collection is empty
println(emptyList.maxOrNull()) // null
println(emptyList.minOrNull()) // null 
   //sampleEnd
}