添加(637.二叉树的层平均值):增加typescript版本

This commit is contained in:
Steve2020
2022-01-28 11:32:57 +08:00
parent e177bca526
commit daf710bde6

View File

@ -941,7 +941,32 @@ var averageOfLevels = function(root) {
};
```
TypeScript
```typescript
function averageOfLevels(root: TreeNode | null): number[] {
let helperQueue: TreeNode[] = [];
let resArr: number[] = [];
let total: number = 0;
let tempNode: TreeNode;
if (root !== null) helperQueue.push(root);
while (helperQueue.length > 0) {
let length = helperQueue.length;
for (let i = 0; i < length; i++) {
tempNode = helperQueue.shift()!;
total += tempNode.val;
if (tempNode.left) helperQueue.push(tempNode.left);
if (tempNode.right) helperQueue.push(tempNode.right);
}
resArr.push(total / length);
total = 0;
}
return resArr;
};
```
Swift:
```swift
func averageOfLevels(_ root: TreeNode?) -> [Double] {
var res = [Double]()