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feat: modify some Dart codes and add Dart code blocks to the docs (#543)

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liuyuxin
2023-06-02 14:56:29 +08:00
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parent 53e18bc6d6
commit 281c0c618a
25 changed files with 339 additions and 54 deletions
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4
docs/chapter_tree/array_representation_of_tree.md
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@@ -103,7 +103,9 @@
=== "Dart"
```dart title=""
/* 二叉树的数组表示 */
// 使用 int? 可空类型 ，就可以使用 null 来标记空位
List<int?> tree = [1, 2, 3, 4, null, 6, 7, 8, 9, null, null, 12, null, null, 15];
```
![任意类型二叉树的数组表示](binary_tree.assets/array_representation_with_empty.png)