kotlin-stdlib / kotlin.sequences / singleOrNull

singleOrNull

Common
JVM
JS
Native
1.0
fun <T> Sequence<T>.singleOrNull(): T?
(source)

Returns single element, or null if the sequence is empty or has more than one element.

The operation is terminal.

Common
JVM
JS
Native
1.0
inline fun <T> Sequence<T>.singleOrNull(
    predicate: (T) -> Boolean
): T?
(source)

Returns the single element matching the given predicate, or null if element was not found or more than one element was found.

The operation is terminal.