On this page

Sequence.oneOrNil(_:)

oneOrNil(_:) ( expression : FilterExpr<Element> ) → Self.Element? method [source] ¶ method [source] ¶ oneOrNil(_:)

The one element the filter matches, or nil if none did.

Only ambiguity is an error here; absence is an ordinary answer.

Raises

0 declared, 0 inherited