filterFromKeys method

Map<K, V> filterFromKeys(
  1. List<K> keys
)

根据keys集合，返回一个新的Map

Implementation

Map<K, V> filterFromKeys(List<K> keys) {
  Map<K, V> newMap = {};
  for (K key in keys) {
    newMap[key] = this[key] as V;
  }
  return newMap;
}