keys
Note
This is a point-in-time snapshot of the API documentation from January 2026. Going forward, we will not be maintaining a public copy of these references, and recommend users to refer to the built-in signature helpers available in the Hack LSP instead for complete and up-to-date information.
Returns an ImmVector containing the keys, as values, of the current
ImmVector
public function keys(): ImmVector<int>;
Returns
ImmVector<int>- AnImmVectorcontaining, as values, the integer keys of the currentImmVector.
Examples
See Vector::keys for usage examples.