Rules Hub
Coding Rules Library
← Back to all rules
Rule priority, scope & exceptions
Use this to align rules with the senior-level structure (P0/P1/P2, scope, exceptions/tradeoffs).
fullstack ruleP2universalStack: javascript
arraysclean-codefunctionalconventions
Use forEach for side effects, map for transformations
When iterating purely for side effects, use forEach (or for-of); reserve map for building a new array from returned values.
PR: frontpage-web · org-mining-hist-2026-06Created: Jun 18, 2026
Bad example
Old codetypescript
| 1 | items.map(item => { sendAnalytics(item); }); // discards array, side-effect only |
Explanation (EN)
Objašnjenje (HR)
Good example
New codetypescript
| 1 | items.forEach(item => sendAnalytics(item)); |
Explanation (EN)
Objašnjenje (HR)