HH\ImmVector::filterWithKey

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

public function filterWithKey(
  (function(int, Tv): bool) $callback,
): ImmVector<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 ImmVector.

Parameters

• (function(int, Tv): bool) $callback

Returns

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

Examples

See [Vector::filterWithKey](</hack/reference/class/Vector/filterWithKey/#examples>) for usage examples.