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

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

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

The operation is terminal.

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

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

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

The operation is terminal.