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DocumentationHSLReferenceFunctionHH\Lib\Dict\pull_with_key

HH\Lib\Dict\pull_with_key

Requires the Hack Standard Library to be installed.
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This function is available as Dict\pull_with_key() in Facebook's www repository.

Returns a new dict where:

  • values are the result of calling $value_func on the original value/key
  • keys are the result of calling $key_func on the original value/key
namespace HH\Lib\Dict;

function pull_with_key<Tk1, Tk2 as arraykey, Tv1, Tv2>(
  KeyedTraversable<Tk1, Tv1> $traversable,
  (function(Tk1, Tv1): Tv2) $value_func,
  (function(Tk1, Tv1): Tk2) $key_func,
): dict<Tk2, Tv2>;

In the case of duplicate keys, later values will overwrite the previous ones.

Time complexity: O(n * (f1 + f2), where f1 is the complexity of $value_func and f2 is the complexity of $key_func Space complexity: O(n)

Parameters

Returns

  • dict<Tk2, Tv2>