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Review Summary
Great job implementing the custom sort2 method and handling the logic for both default and custom comparison functions. Your approach is on the right track!
However, this requires changes because the current implementation doesn't handle undefined values correctly. The native Array.prototype.sort moves all undefined elements to the end of the array without passing them to the compareFunction. Your code passes undefined to the comparator, which can lead to incorrect results, such as NaN when using a numeric comparison like (a, b) => a - b.
Please update your sorting logic to specifically handle undefined values by moving them to the end of the array, just as the native method does.
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Footnotes
src/arrayMethodSort.js
Outdated
| const shouldSwap = compareFunction | ||
| ? compareFunction(arr[j], arr[j + 1]) > 0 | ||
| : String(arr[j]) > String(arr[j + 1]); |
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This logic doesn't handle undefined values correctly when a compareFunction is provided. The native Array.prototype.sort moves all undefined elements to the end of the array without passing them to the compareFunction. Your current implementation passes undefined to compareFunction, which can lead to unexpected behavior (e.g., (a, b) => a - b would result in NaN).
Consider adding logic to handle undefined values specifically, treating them as if they are larger than any other value.
mateacademy-ai-mentor
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Review Summary
Excellent work on this iteration! I am approving your solution as you've successfully addressed all the previous feedback. The logic for handling undefined values is now correct: they are moved to the end of the array and are not passed to the compareFunction, which perfectly meets the task requirements. For future learning, you might consider exploring more efficient sorting algorithms like Quicksort or Merge Sort, but your current implementation is a great solution for this problem. Well done!
✨ Please rate this review in the Platform's notification center1. I will be grateful for your feedback! ✨
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