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(
  (function(int,mixed):bool) $callback,
): ImmVector<mixed>

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

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

Return Values