更新 1207.独一无二的出现次数 JavaScript版本

This commit is contained in:
jerryfishcode
2021-09-27 13:06:39 +08:00
committed by GitHub
parent f7990b703b
commit 55e185b5e6

View File

@ -118,7 +118,23 @@ class Solution:
Go Go
JavaScript JavaScript
``` javascript
var uniqueOccurrences = function(arr) {
const count = new Array(2002).fill(0);// -1000 <= arr[i] <= 1000
for(let i = 0; i < arr.length; i++){
count[arr[i] + 1000]++;// 防止负数作为下标
}
// 标记相同频率是否重复出现
const fre = new Array(1002).fill(false);// 1 <= arr.length <= 1000
for(let i = 0; i <= 2000; i++){
if(count[i] > 0){//有i出现过
if(fre[count[i]] === false) fre[count[i]] = true;//之前未出现过,标记为出现
else return false;//之前就出现了,重复出现
}
}
return true;
};
```
----------------------- -----------------------
* 作者微信:[程序员Carl](https://mp.weixin.qq.com/s/b66DFkOp8OOxdZC_xLZxfw) * 作者微信:[程序员Carl](https://mp.weixin.qq.com/s/b66DFkOp8OOxdZC_xLZxfw)
* B站视频[代码随想录](https://space.bilibili.com/525438321) * B站视频[代码随想录](https://space.bilibili.com/525438321)