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: n words need n - 1 dashes, but the loop adds one after every word.
The fix: return words.join("-");
Remember: separators go between items, so there is always one fewer than the items.
The pattern behind it: off-by-one errors.
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<iframe src="https://trybughunt.com/embed/04b67bdc-fbf5-4365-b82a-02adfc3c70da" title="Debugging challenge: Joining words leaves a dash at the end" 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/04b67bdc-fbf5-4365-b82a-02adfc3c70da">TryBugHunt</a></p>