HH\Lib\Dict\pull

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This is available as Dict\pull in the www repository.

Returns a new dict with mapped keys and values

namespace HH\Lib\Dict;

function pull<Tk as arraykey, Tv1, Tv2>(
  Traversable<Tv1> $traversable,
  (function(Tv1): Tv2) $value_func,
  (function(Tv1): Tk) $key_func,
): dict<Tk, Tv2>;
  • values are the result of calling $value_func on the original value
  • keys are the result of calling $key_func on the original value. 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

  • Traversable<Tv1>$traversable
  • (function(Tv1): Tv2) $value_func
  • (function(Tv1): Tk) $key_func

Returns

  • dict<Tk, Tv2>