Function getIn

src/functional/getIn.ts:18–33

(
  collection: CollectionType,
  searchKeyPath: KeyPath<Key>,
  notSetValue?: GetTypeParameters[2]
)

 * work with plain Objects and Arrays.
 */
export function getIn(
  collection: CollectionType,
  searchKeyPath: KeyPath<Key>,
  notSetValue?: GetTypeParameters[2]
): ReturnType<GetType> {
  const keyPath = coerceKeyPath(searchKeyPath);
  let i = 0;
  while (i !== keyPath.length) {
    // @ts-expect-error keyPath[i++] can not be undefined by design
    collection = get(collection, keyPath[i++], NOT_SET);
    if (collection === NOT_SET) {
      return notSetValue;
    }
  }
  return collection;
}