removeWhere method

@override void removeWhere(bool test(K key, V value))

Removes all entries of this map that satisfy the given test.

final terrestrial = <int, String>{1: 'Mercury', 2: 'Venus', 3: 'Earth'};
terrestrial.removeWhere((key, value) => value.startsWith('E'));
print(terrestrial); // {1: Mercury, 2: Venus}

Implementation

@override
void removeWhere(bool Function(K key, V value) test) {
  final List<MapEntry<K, V>> removed = [];
  for (final entry in _map.entries) {
    if (test(entry.key, entry.value)) {
      removed.add(entry);
    }
  }
  for (final entry in removed) {
    _map.remove(entry.key);
  }
  notifyListeners(MapChangeDetails<K, V>([], removed));
}