POTD_28_OCT_2024_REMOVE_DUPLICATES_IN_AN_ARRAY

[Varalakshmi2354]

📝 Description

Given an array of positive integers, the task is to remove all duplicate numbers while preserving the order of their first occurrence. The function should return a new array containing only the unique elements.

💡 Enhancement / Feature Request (if applicable)

Why It's Useful
Removing duplicates from an array is essential in various scenarios, including:

1.Data Processing: Cleaning datasets for analysis by eliminating redundancy.
2.Memory Optimization: Reducing the size of data structures when only unique elements are needed.
3.User Interfaces: Ensuring that lists displayed to users (e.g., dropdowns or selections) do not contain repeated entries.

How It Should Work
1.Iterate Through the Array: For each element in the input array, check if it has been encountered before.
2.Track Unique Elements: Use a set to keep track of elements that have already been added to the result.
3.Build the Result Array: Append elements to the result array only if they are unique.
4.Return the Result: The final output should be an array containing all unique elements in their first-encountered order.

🌐 Additional Context

Complexity: The proposed solution has a time complexity of 𝑂(𝑛), where n is the size of the array, since each element is processed once. The space complexity is also 𝑂(𝑛) for storing the unique elements and the set.

Edge Cases: Handle cases where the input array is empty or has only one element by returning an empty array or the array itself, respectively.

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