### functionName

Returns `1` if the array is sorted in ascending order, `-1` if it is sorted in descending order or `0` if it is not sorted.

Calculate the ordering `direction` for the first two elements.
Use `Object.entries()` to loop over array objects and compare them in pairs.
Return `0` if the `direction` changes or the `direction` if the last element is reached.

```js
const isArraySorted = arr => {
  const direction = arr[0] > arr[1] ? -1 : 1;
  for(let [i, val] of arr.entries())
    if (i === arr.length - 1) return direction;
    else if ((val - arr[i + 1]) * direction > 0) return 0;
}
```

```js
isArraySorted([0,1,2,3]) // 1
isArraySorted([0,1,2,2]) // 1
isArraySorted([4,3,2]) // -1
isArraySorted([4,3,5]) // 0
```