HH\Map::toSet

Description

public function toSet(): Set<Tv>

Returns a Set based on the values of the current Map.

Return Values

Examples

This example shows that converting a Map to a Set also removes duplicate values:

<?hh

namespace Hack\UserDocumentation\API\Examples\Map\ToSet;

// This Map contains repetitions of the hex codes for 'red' and 'blue'
$m = Map {
  'red' => '#ff0000',
  'also red' => '#ff0000',
  'green' => '#00ff00',
  'another red' => '#ff0000',
  'blue' => '#0000ff',
  'another blue' => '#0000ff',
  'yellow' => '#ffff00',
};

$set = $m->toSet();

var_dump($set instanceof \HH\Set);
var_dump($set);
Output
bool(true)
object(HH\Set)#2 (4) {
  string(7) "#ff0000"
  string(7) "#00ff00"
  string(7) "#0000ff"
  string(7) "#ffff00"
}