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selection.Selection.oneOrUndefined

oneOrUndefined ( criteria : : WhereOf<Model> ) → Model | undefined method [source] ¶ method [source] ¶ oneOrUndefined

The single member, or undefined when there is none.

one without the empty case: several still throws, because that says the criteria were wrong rather than that the answer is absent.

Examples

snapshot.sessions.oneOrUndefined({ name: "work" })?.id;

0 declared, 0 inherited