mixed-boolean-operators
Mixed and/or without parentheses makes operator precedence ambiguous
Applies to: Go, JavaScript, Python, TypeScript
Why this matters
`and`/`&&` binds tighter than `or`/`||`. Without explicit parentheses, `a or b and c` means `a or (b and c)` — not `(a or b) and c`. Adding parens prevents subtle logic bugs.
Catch it before it ships
pip install stablestack # or: npx stablestackstablestack # scans your project, QUAL013 includedstablestack explain QUAL013QUAL013 is part of the Pro rule set. See pricing — the free tier ships 24 checks with no signup.
False positive in your codebase? Suppress a single line with # noqa: QUAL013
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