Data Deduplicator
Input: `arr` (list) of raw data. Return: List with duplicates removed, preserving order.
Example
Input: 1, 2, 2, 3
Output: [1, 2, 3]
Need a hint?
- Use a set or build a new list checking membership
Run your code to see output
Input: `arr` (list) of raw data. Return: List with duplicates removed, preserving order.
Input: 1, 2, 2, 3
Output: [1, 2, 3]
Run your code to see output