Platform and version requirements: JVM (1.0), JS (1.0), Native (1.0)

fun <T> Array<out T>.firstOrNull(): T?

fun ByteArray.firstOrNull(): Byte?

fun ShortArray.firstOrNull(): Short?

fun IntArray.firstOrNull(): Int?

fun LongArray.firstOrNull(): Long?

fun FloatArray.firstOrNull(): Float?

fun DoubleArray.firstOrNull(): Double?

fun BooleanArray.firstOrNull(): Boolean?

fun CharArray.firstOrNull(): Char?

@ExperimentalUnsignedTypes fun UIntArray.firstOrNull(): UInt?

@ExperimentalUnsignedTypes fun ULongArray.firstOrNull(): ULong?

@ExperimentalUnsignedTypes fun UByteArray.firstOrNull(): UByte?

@ExperimentalUnsignedTypes fun UShortArray.firstOrNull(): UShort?

Returns the first element, or null if the array is empty.

Platform and version requirements: JVM (1.0), JS (1.0), Native (1.0)

inline fun <T> Array<out T>.firstOrNull(
    predicate: (T) -> Boolean
): T?

inline fun ByteArray.firstOrNull(
    predicate: (Byte) -> Boolean
): Byte?

inline fun ShortArray.firstOrNull(
    predicate: (Short) -> Boolean
): Short?

inline fun IntArray.firstOrNull(
    predicate: (Int) -> Boolean
): Int?

inline fun LongArray.firstOrNull(
    predicate: (Long) -> Boolean
): Long?

inline fun FloatArray.firstOrNull(
    predicate: (Float) -> Boolean
): Float?

inline fun DoubleArray.firstOrNull(
    predicate: (Double) -> Boolean
): Double?

inline fun BooleanArray.firstOrNull(
    predicate: (Boolean) -> Boolean
): Boolean?

inline fun CharArray.firstOrNull(
    predicate: (Char) -> Boolean
): Char?

inline fun <T> Iterable<T>.firstOrNull(
    predicate: (T) -> Boolean
): T?

@ExperimentalUnsignedTypes inline fun UIntArray.firstOrNull(
    predicate: (UInt) -> Boolean
): UInt?

@ExperimentalUnsignedTypes inline fun ULongArray.firstOrNull(
    predicate: (ULong) -> Boolean
): ULong?

@ExperimentalUnsignedTypes inline fun UByteArray.firstOrNull(
    predicate: (UByte) -> Boolean
): UByte?

@ExperimentalUnsignedTypes inline fun UShortArray.firstOrNull(
    predicate: (UShort) -> Boolean
): UShort?

Returns the first element matching the given predicate, or null if element was not found.

Platform and version requirements: JVM (1.0), JS (1.0), Native (1.0)

fun <T> Iterable<T>.firstOrNull(): T?

Returns the first element, or null if the collection is empty.

Platform and version requirements: JVM (1.0), JS (1.0), Native (1.0)

fun <T> List<T>.firstOrNull(): T?

Returns the first element, or null if the list is empty.