HH\Vector::get

Returns the value at the specified key in the current Vector.

Description

public function get(
  int $k,
): ?Tv

Returns the value at the specified key in the current Vector.

If the key is not present, null is returned. If you would rather have an exception thrown when a key is not present, then use at().

Parameters

  • int $k - the key from which to retrieve the value.

Return Values

  • ?Tv - The value at the specified key; or null if the key does not exist.

Examples

This example shows how get can be used to access an index that may not exist:

<?hh

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

$v = Vector {'red', 'green', 'blue', 'yellow'};

// Index 0 is the element 'red'
var_dump($v->get(0));

// Index 10 doesn't exist
var_dump($v->get(10));
Output
string(3) "red"
NULL