HH\Vector::keys

Returns a Vector containing the keys of the current Vector

public function keys(): Vector<int>;

Returns

• Vector<int> - A Vector containing the integer keys of the current Vector.

Examples

$v = Vector {'red', 'green', 'blue', 'yellow'};
var_dump($v->keys());

object(HH\Vector)#2 (4) {
  [0]=>
  int(0)
  [1]=>
  int(1)
  [2]=>
  int(2)
  [3]=>
  int(3)
}