HH\Vector::toImmSet

Returns an immutable set (ImmSet) based on the values of the current Vector

Description

public function toImmSet(): ImmSet<Tv>;

Return Values

  • ImmSet<Tv> - An ImmSet containing the unique values of the current Vector.

Examples

This example shows that converting a Vector to an ImmSet also removes duplicate values:

<?hh

namespace Hack\UserDocumentation\API\Examples\Vector\ToImmSet;

// This Vector contains repetitions of 'red' and 'blue'
$v = Vector {'red', 'green', 'red', 'blue', 'red', 'yellow', 'blue'};

$imm_set = $v->toImmSet();

var_dump($imm_set instanceof \HH\ImmSet);
var_dump($imm_set);
Output
bool(true)
object(HH\ImmSet)#2 (4) {
  string(3) "red"
  string(5) "green"
  string(4) "blue"
  string(6) "yellow"
}