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sort

Note

This is a point-in-time snapshot of the API documentation from January 2026. Going forward, we will not be maintaining a public copy of these references, and recommend users to refer to the built-in signature helpers available in the Hack LSP instead for complete and up-to-date information.

Returns a new vec sorted by the values of the given Traversable

namespace HH\Lib\Vec;

function sort<Tv>(
  Traversable<Tv> $traversable,
  ?(function(Tv, Tv): num) $comparator = NULL,
): vec<Tv>;

If the optional comparator function isn't provided, the values will be sorted in ascending order.

To sort by some computable property of each value, see Vec\sort_by().

Time complexity: O((n log n) * c), where c is the complexity of the comparator function (which is O(1) if not provided explicitly) Space complexity: O(n)

Parameters​

Returns​

  • vec<Tv>

Examples​

$example_vec = vec[100,2,4,1,6];
$result = Vec\sort($example_vec);
print_r($result);
//result: [1,2,4,6,100]

$example_vec = vec[1,2,3,4,5];
$result = Vec\sort($example_vec);
print_r($result);
//result: [1,2,3,4,5]

$example_vec = vec[0,0,0,0,0];
$result = Vec\sort($example_vec);
print_r($result);
//result: [0,0,0,0,0]