HH\Lib\Vec\unique

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This is available as Vec\unique in the www repository.

Returns a new vec containing each element of the given Traversable exactly once

namespace HH\Lib\Vec;

function unique<Tv as arraykey>(
  Traversable<Tv> $traversable,
): vec<Tv>;

The Traversable must contain arraykey values, and strict equality will be used.

For non-arraykey elements, see Vec\unique_by().

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

Parameters

$vector = vec[1, 1, 2, 3, 4, 4, 4, 4];
$uniqueVals = Vec\unique($vector);
\print_r($uniqueVals);