Time: 0:00
Test a custom input to verify an edge case (e.g. empty lists, negative numbers, duplicates).
This bug belongs to the logic errors pattern
The wrong operator, an inverted condition, a formula the right way round but backwards.
What went wrong: list * 2 repeats the whole list. It does not change the numbers.
The fix: return [p * 2 for p in prices]
Remember: to change every item, use a list comprehension.
The pattern behind it: logic errors.
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<iframe src="https://trybughunt.com/embed/27327aa3-d170-4328-a674-f9bb1566726b" title="Debugging challenge: Doubling the prices doubles the list instead" 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/27327aa3-d170-4328-a674-f9bb1566726b">TryBugHunt</a></p>