INNER CODE UNIT · Dart

RegistryOrderMap

foxsofter/flutter_thrio · lib/src/collection/registry_order_map.dart:25

class RegistryOrderMap<K, V> {
  final _list = <MapEntry<K, V>>[];

  VoidCallback registry(K key, V value) {
    assert(key != null, 'key must not be null.');
    assert(value != null, 'value must not be null.');
    final item = MapEntry(key, value);
    _list.add(item);
    return () {
      _list.remove(item);
    };
  }

  int get length => _list.length;

  MapEntry<K, V> elementAt(int index) => _list.elementAt(index);

  Iterable<K> get keys => _list.map((it) => it.key);

View source record →