Username collision after normalization

Code reviewCode quality & reviewSenior–Staff~30 min

Review this Python username uniqueness check.

What a strong answer looks like

Separate real bugs from style. Rank issues by severity, point at the root cause rather than the symptom, and suggest a concrete fix, specific and kind.

0:00 of about 30 min

Mark a line and say what kind of problem it is.0 findings

1def is_available(requested: str, taken: set[str]) -> bool:

2 return requested.lower() not in taken

4def register(requested, taken):

5 if is_available(requested, taken):

6 taken.add(requested.lower())

7 return True

8 return False

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