Given an array, your task is to return a new array with all duplicate elements removed.
You should preserve the order of the first occurrence of each element.
Input
- An array of any primitive values:
number, string, boolean, null, or undefined.
Output
- A new array containing only unique elements, in the order they first appear.
Edge Cases
-
Empty array should return an empty array.
-
Duplicates can be of different types (e.g., 1 and "1" are not the same).
-
Object and array references are considered unique even if they look identical.
Examples
removeDuplicates([1, 2, 2, 3, 4, 4]);
// Output: [1, 2, 3, 4]
removeDuplicates(["a", "b", "a", "c"]);
// Output: ["a", "b", "c"]
removeDuplicates([1, "1", 1]);
// Output: [1, "1"]
removeDuplicates([]);
// Output: []
removeDuplicates([true, false, true]);
// Output: [true, false]
