HH\Pair::toSet

Returns a Set with the values of the current Pair

public function toSet(): Set<arraykey, mixed>;

Returns

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

// This Pair contains 'foo' twice
$p = Pair {'foo', 'foo'};

$s = $p->toSet();
\var_dump($s);

This example shows that converting a Pair to a Set will throw a fatal error if the Pair contains a value that's not a string or an int:

$p = Pair {'foo', -1.5};

/* HH_FIXME[4323] Fatal error will be thrown here */
$s = $p->toSet();

\var_dump($s);