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添加（二叉树理论基础.md）：增加typescript版本 #1057

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Merged
merged 1 commit into from
Feb 10, 2022
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添加（二叉树理论基础.md）：增加typescript版本 #1057

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16 changes: 16 additions & 0 deletions problems/二叉树理论基础.md
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Original file line number Diff line number Diff line change
Expand Up @@ -227,7 +227,23 @@ function TreeNode(val, left, right) {
}
```

TypeScript：

```typescript
class TreeNode {
public val: number;
public left: TreeNode | null;
public right: TreeNode | null;
constructor(val?: number, left?: TreeNode, right?: TreeNode) {
this.val = val === undefined ? 0 : val;
this.left = left === undefined ? null : left;
this.right = right === undefined ? null : right;
}
}
```

Swift:

```Swift
class TreeNode<T> {
var value: T
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