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Rule priority, scope & exceptions
Use this to align rules with the senior-level structure (P0/P1/P2, scope, exceptions/tradeoffs).
fullstack ruleP2universalStack: JavaScript/TypeScript
clean-codearraysredundancy
Don't re-check the first element after verifying length
If you already confirmed an array is non-empty, accessing the first element doesn't need a separate optional/guard check.
PR: hegnar-components · org-mining-hist-2026-06Created: Jun 18, 2026
Bad example
Old codetypescript
| 1 | if (shouldShowEmptyState) return <Empty />; // already ensures length > 0 |
| 2 | const first = reports?.[0]; // '?' redundant here |
Explanation (EN)
Objašnjenje (HR)
Good example
New codetypescript
| 1 | if (shouldShowEmptyState) return <Empty />; |
| 2 | const first = reports[0]; |
Explanation (EN)
Objašnjenje (HR)