Remove Duplicates From Array | Dataford Interview Questions

Write a function to remove duplicates from an array.

Return a new array containing each value once, preserving the order of its first occurrence. The input is an array of integers, and the original array must not be modified.

Function signature: def remove_duplicates(nums):

Example: [3, 1, 3, 2, 1] returns [3, 1, 2]. An empty array returns an empty array.

Constraints: 0 <= len(nums) <= 10^4, and each value is an integer.

Constraints

0 <= len(nums) <= 10^4
Each nums[i] is an integer
The original array must not be modified
The output preserves first-occurrence order

Function Signature

def remove_duplicates(nums):

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