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[RSydorenko322]

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[mateacademy-ai-mentor]

Review Summary

Your solution is approved because it fully meets the functional requirements of the task and behaves correctly for the specified examples. The formatDate function correctly parses the input date using fromFormat, remaps the components according to toFormat, and swaps separators as required. You handled year conversions properly: YYYY → YY by taking the last two digits, and YY → YYYY by mapping years < 30 to 20YY and others to 19YY, which matches the specification. It is also good that you intentionally avoided extra validation and assumed well-formed inputs, which aligns with the constraints of the task.

One small area for improvement (non-blocking) is readability: looping over toFormat while implicitly treating the last element as the separator could be clearer if you explicitly separate the patterns from the separator (for example, via destructuring or a named variable). This would make future maintenance or extension of the function easier. Overall, your implementation is correct, focused, and respects the given constraints—well done.

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