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take

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 the first $n elements of the given Traversable

namespace HH\Lib\Vec;

function take<Tv>(
  Traversable<Tv> $traversable,
  int $n,
): vec<Tv>;

To drop the first $n elements, see Vec\drop().

Time complexity: O(n), where n is $n Space complexity: O(n), where n is $n

Parameters​

Returns​

  • vec<Tv>

Examples​

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

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

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