mirror of
https://github.com/youngyangyang04/leetcode-master.git
synced 2025-07-11 04:54:51 +08:00
新增724. 寻找数组的中心索引 JavaScript版本
This commit is contained in:
@ -129,6 +129,17 @@ func pivotIndex(nums []int) int {
|
||||
## JavaScript
|
||||
|
||||
```js
|
||||
var pivotIndex = function(nums) {
|
||||
const sum = nums.reduce((a,b) => a + b);//求和
|
||||
// 中心索引左半和 中心索引右半和
|
||||
let leftSum = 0, rightSum = 0;
|
||||
for(let i = 0; i < nums.length; i++){
|
||||
leftSum += nums[i];
|
||||
rightSum = sum - leftSum + nums[i];// leftSum 里面已经有 nums[i],多减了一次,所以加上
|
||||
if(leftSum === rightSum) return i;
|
||||
}
|
||||
return -1;
|
||||
};
|
||||
```
|
||||
|
||||
-----------------------
|
||||
|
Reference in New Issue
Block a user