Time: 0:00
Test a custom input to verify an edge case (e.g. empty lists, negative numbers, duplicates).
This bug belongs to the type errors pattern
Totals that concatenate, sorts that put 10 before 9, comparisons that refuse to run.
What went wrong: == converts values before comparing. "" and false both convert to 0, so they are counted.
The fix: values.filter((v) => v === 0).length
Remember: use === in JavaScript. It never converts types.
The pattern behind it: type errors.
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<iframe src="https://trybughunt.com/embed/00e31749-d3a6-426e-86c9-c11cfa9dd56f" title="Debugging challenge: Zero counter also counts "" and false" 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/00e31749-d3a6-426e-86c9-c11cfa9dd56f">TryBugHunt</a></p>