HH\Pair::filterWithKey

Returns an ImmVector containing the values of the current Pair that meet a supplied condition applied to its keys and values.

Description

public function filterWithKey(
  callable $callback,
): ImmVector<mixed>

Returns an ImmVector containing the values of the current Pair that meet a supplied condition applied to its keys and values.

Only keys and values that meet a certain criteria are affected by a call to filterWithKey(), while all values are affected by a call to mapWithKey().

Parameters

  • callable $callback - The callback containing the condition to apply to the current Pair keys and values.

Return Values