**Tell us what’s happening:**

I thought I understood this => (const dontGetIt = (a, b) => b - a;), I was wrong I don’t get it at all. I can’t figure out why if const => (dontGetIt = (a, b) => a - b;) it does not work. Someone can explain me please.

```
**Your code so far**
```

```
function largestOfFour(arr) {
let newArr = [];
const dontGetIt = (a, b) => b - a;
for (let i = 0; i < arr.length; i++) {
newArr.push(arr[i].sort(dontGetIt)[0])
}
return newArr;
}
largestOfFour([[4, 5, 1, 3], [13, 27, 18, 26], [32, 35, 37, 39], [1000, 1001, 857, 1]]);
```

```
**Your browser information:**
```

User Agent is: `Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/90.0.4430.93 Safari/537.36`

.

**Challenge:** Return Largest Numbers in Arrays

**Link to the challenge:**