Refactor grouping logic to improve readability and maintainability #10
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- Added a new script "coverage" to run tests with coverage reporting. - Updated dependencies to include NYC for coverage functionality.
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This PR addresses Issue #6 by refactoring the core grouping logic for better readability and maintainability.
Key Changes:
• Replaced reduce with a clearer for...of loop.
• Handled edge cases early (e.g., empty data or groupByKeys).
• Used Record<string, any> for safer and cleaner typing.
• Removed unnecessary type assertions.
• Added JSDoc comments for better code documentation.
• Improved variable naming and structure for easier understanding.
These changes do not alter the core functionality but aim to make the codebase more accessible and easier to maintain.