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reverse

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 with the values of the given Traversable in reversed order

namespace HH\Lib\Vec;

function reverse<Tv>(
  Traversable<Tv> $traversable,
): vec<Tv>;

Time complexity: O(n) Space complexity: O(n)

Parameters​

Returns​

  • vec<Tv>

Examples​

$vector = vec[1, 2, 3, 4, 5, 6];
$reversed = Vec\reverse($vector);
\print_r($reversed);