Skip to main content

filter_nulls

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 containing only non-null values of the given Traversable

namespace HH\Lib\Vec;

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

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

Parameters​

Returns​

  • vec<Tv>