写了个不优雅的
```js
const maxKeys = obj => Object.entries(obj).reduce((acc, cur) => {
const [key, value] = cur;
if (value > acc.max) {
acc.max = value;
acc.list = [key];
return acc;
}

if (value === acc.max) {
acc.list.push(key);
}

return acc;
}, {max: 0, list: []}).list;

maxKeys(params); // ["i", "c"]
```