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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 dict containing the first $n entries of the given KeyedTraversable

namespace HH\Lib\Dict;

function take<Tk as arraykey, Tv>(
  KeyedTraversable<Tk, Tv> $traversable,
  int $n,
): dict<Tk, Tv>;

To drop the first $n entries, see Dict\drop().

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

Parameters​

Returns​

  • dict<Tk, Tv>

Examples​

$result = Dict\take(dict[1 => 2, 2 => 4, 3 => 9], 1);
print_r($result);
//dict[1=>2]

$result = Dict\take(dict[], 1);
print_r($result);
//result: dict[]