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Review Summary
Excellent work on this task! Your custom sort2 method is correctly implemented on the Array prototype and successfully handles both default and custom comparator functions, meeting all requirements. I'm happy to approve your solution. As a couple of minor suggestions for future improvement, you can make your sorting loop slightly more efficient by starting the inner loop with j = i + 1 to avoid comparing an element to itself. Additionally, the b = 0; assignment after the swap is redundant and can be safely removed. These are just small refinements; your logic is solid.
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Footnotes
| for (let i = 0; i < this.length; i++) { | ||
| let b = 0; | ||
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| for (let j = i; j < this.length; j++) { |
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This inner loop starts by comparing an element with itself (j starts at i). To make the code slightly more efficient, you can start the loop from j = i + 1.
| b = this[i]; | ||
| this[i] = this[j]; | ||
| this[j] = b; | ||
| b = 0; |
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This line reassigning b to 0 is not necessary. The variable b will be correctly reassigned the next time a swap happens, or it will be re-initialized at the beginning of the next outer loop iteration.
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