Feature/update max value

[eaglebk]

Description:
This PR updates the getMaxValue function to improve code readability and efficiency. The current implementation uses reduce to find the maximum value in the dataset, making the code more concise and eliminating the need for an explicit loop. Additionally, it provides a default value of 0 for cases when the dataset is empty or null

Changes Made:
Refactored the getMaxValue function to use the reduce method.
Added a default value of 0 to handle empty or null datasets.
Removed the explicit loop for finding the maximum value.

Testing:
The updated function has been tested with various datasets, including empty and null datasets, to ensure that it correctly returns the maximum value or the default value 0 when appropriate.

Please review and merge this Pull Request if the changes align with the project's goals. Thank you!