在Dart中迭代映射映射的映射

Map<String, Map<String, Map<String, dynamic>>> nestedMap = {
  'outerKey1': {
    'innerKey1': {'value': 1},
    'innerKey2': {'value': 2},
  },
  'outerKey2': {
    'innerKey3': {'value': 3},
    'innerKey4': {'value': 4},
  },
};

void iterateNestedMap(Map<String, Map<String, Map<String, dynamic>>> nestedMap) {
  for (var outerKey in nestedMap.keys) {
    print('Outer Key: $outerKey');
    for (var innerKey in nestedMap[outerKey].keys) {
      print('Inner Key: $innerKey');
      var value = nestedMap[outerKey][innerKey]['value'];
      print('Value: $value');
    }
  }
}

void main() {
  iterateNestedMap(nestedMap);
}

Outer Key: outerKey1
Inner Key: innerKey1
Value: 1
Inner Key: innerKey2
Value: 2
Outer Key: outerKey2
Inner Key: innerKey3
Value: 3
Inner Key: innerKey4
Value: 4