HH\Set::keys

Returns a Vector containing the values of the current Set

public function keys(): Vector<arraykey>;

Sets don't have keys, so this will return the values.

This method is interchangeable with toVector() and values().

Returns

• Vector<arraykey> - a Vector (integer-indexed) containing the values of the current Set.

Examples

This example shows that keys() returns a Vector of the Set's values because Sets don't have keys:

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

object(HH\Vector)#2 (4) {
  [0]=>
  string(3) "red"
  [1]=>
  string(5) "green"
  [2]=>
  string(4) "blue"
  [3]=>
  string(6) "yellow"
}