HH\Vector::toKeysArray
Returns an array whose values are the keys from the current Vector
public function toKeysArray(): varray<int>;
Returns
varray<int>- Anarraywith the integer keys from the currentVector.
Examples
$v = Vector {'red', 'green', 'blue', 'yellow'};
$keys_array = $v->toKeysArray();
\var_dump(\HH\is_any_array($keys_array));
\var_dump($keys_array);