Remove Duplicates From Array

Given an array, return another array with just the ordered unique elements from the given array. In other words, you're removing any duplicates.

Note: Order needs to be preserved, so no sorting should be done. And the order should be maintained with the first occurrence of the element in the given array.

function uniques(arr) {
  // fill in
}

let arr = [3, 5, 6, 9, 9, 4, 3, 12]
uniques(arr);
// Correct: [3, 5, 6, 9, 4, 12]
// But this is incorrect: [5, 6, 9, 4, 3, 12]

arr = [13, 5, 3, 5, 8, 13, 14, 5, 9]
uniques(arr);
// Correct: [13, 5, 3, 8, 14, 9]
// Incorrect: [3, 5, 8, 13, 14, 9]

Constraints

• Length of the array <= 100000
• The values in the array between -1000000000 and 1000000000
• Expected time complexity: O(n)
• Expected space complexity: O(n)

```js
function uniques(array) {
  // Fill in this method
  return array;
}

console.log(uniques([3, 5, 6, 9, 9, 4, 3, 12]));
```