HH\ImmMap::differenceByKey

Returns a new ImmMap with the keys that are in the current ImmMap, but not in the provided KeyedTraversable

public function differenceByKey(
  KeyedTraversable<mixed, mixed> $traversable,
): ImmMap<Tk, Tv>;

Parameters

• KeyedTraversable<mixed,mixed> $traversable - The KeyedTraversable on which to compare the keys.

Returns

• ImmMap<Tk,Tv> - An ImmMap containing the keys (and associated values) of the current ImmMap that are not in the KeyedTraversable.

Examples

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