deepSearchByValue<E> method

Map deepSearchByValue<E>(bool predicate(E value))

Returns new instance of recursively filtered (by value) Map.

Implementation

Map deepSearchByValue<E>(bool predicate(E value)) =>
    LinkedHashMap.fromIterable(keys,
        key: (k) => k,
        value: (k) {
          if (this[k] is Map) {
            return (this[k] as Map).deepSearchByValue<E>(predicate);
          } else if (this[k] is List) {
            return (this[k] as List).deepSearchByValue<E>(predicate);
          } else if (this[k] is Set) {
            return (this[k] as Set).deepSearchByValue<E>(predicate);
          } else if (this[k] is E && predicate(this[k] as E)) {
            return this[k];
          }
        })
      ..removeWhere(
          (key, value) => value == null || (value is Map && value.isEmpty));