HH\Pair::toImmSet

Returns an immutable set (ImmSet) with the values of the current Pair

public function toImmSet(): ImmSet<arraykey, mixed>;

Returns

• ImmSet<arraykey,mixed> - an ImmSet with the current values of the current Pair.

Examples

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

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

$imm_set = $p->toImmSet();
\var_dump($imm_set);

This example shows that converting a Pair to an ImmSet 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 */
$imm_set = $p->toImmSet();

\var_dump($imm_set);