fun <T> Iterable<T>.single(): T

Returns the single element, or throws an exception if the collection is empty or has more than one element.

fun <T> List<T>.single(): T

Returns the single element, or throws an exception if the list is empty or has more than one element.

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

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

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

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

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

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

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

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

inline fun BooleanArray.single(
    predicate: (Boolean) -> Boolean
): Boolean

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

Returns the single element matching the given predicate, or throws exception if there is no or more than one matching element.

fun <T> Array<out T>.single(): T

fun ByteArray.single(): Byte

fun ShortArray.single(): Short

fun IntArray.single(): Int

fun LongArray.single(): Long

fun FloatArray.single(): Float

fun DoubleArray.single(): Double

fun BooleanArray.single(): Boolean

fun CharArray.single(): Char

Returns the single element, or throws an exception if the array is empty or has more than one element.