---
id: 5d792539728d1aa7788e2c9b
title: Part 130
challengeType: 0
dashedName: part-130
---
# --description--
Unfortunately, `sort` not only returns a new array, but also modifies the existing one. So our function also modifies the array passed to it - it is impure.
You can fix this by adding `.slice()` between `nums` and `sort` - this creates a new array, that is equivalent to `nums`, but is immediately discarded, so it doesn't matter if it changes.
# --hints--
See description above for instructions.
```js
assert(
/constmedian=nums=>\{constsorted=nums\.slice\(\)\.sort\(\((.+),(.+)\)=>\1-\2\)/.test(
code.replace(/\s/g, '')
)
);
```
# --seed--
## --before-user-code--
```html
Spreadsheet
```
## --after-user-code--
```html
```
## --seed-contents--
```html
```
# --solutions--
```html
```