Time: 0:00
Test a custom input to verify an edge case (e.g. empty lists, negative numbers, duplicates).
This bug belongs to the off-by-one errors pattern
The loop that runs one time too many, the slice that drops the last item, the index that starts in the wrong place.
What went wrong: enumerate() counts from 0, like list indexes.
The fix: enumerate(items, start=1)
Remember: count from 0 in code, but from 1 for anything people read.
The pattern behind it: off-by-one errors.
Paste this into any web page or blog post. Visitors fix the bug right there, in their browser.
<iframe src="https://trybughunt.com/embed/7f98669a-b78b-44ed-a223-bc50156b6ecb" title="Debugging challenge: Shopping list numbering starts at 0" width="100%" height="580" loading="lazy" style="border:1px solid #d4d4d8;border-radius:12px;max-width:760px"></iframe>
<p style="font-size:14px">Debugging challenge from <a href="https://trybughunt.com/challenges/7f98669a-b78b-44ed-a223-bc50156b6ecb">TryBugHunt</a></p>