HH\Vector::filterWithKey

Returns a Vector containing the values of the current Vector that meet a supplied condition applied to its keys and values

public function filterWithKey(
  (function(int,Tv):bool) $callback,
):     Vector<Tv>;

filterWithKey()'s result contains only values whose key/value pairs satisfy the provided criterion; unlike mapWithKey(), which contains results derived from every key/value pair in the original Vector.

Parameters

  • (function(int,Tv):bool) $callback - The callback containing the condition to apply to the Vector's key/value pairs. For each key/value pair, the key is passed as the first parameter to the callback, and the value is passed as the second parameter.

Return Values

  • Vector<Tv> - A Vector containing the values of the current Vector for which a user-specified test condition returns true when applied to the corresponding key/value pairs.