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963 markdown files reformatted with the repository's pinned prettier so pnpm format:check covers the folded tree like every other repo file. The formatter's embedded-language pass also normalized code fences (TS semicolons, closed HTML tags in examples, lowercased CSS hex colors, one renumbered list that skipped an index). Alphanumeric token deltas vs the fold commit were audited file-by-file; all are formatter-equivalent markup normalizations plus the four sanitized skills.
768 B
768 B
title, impact, impactDescription, tags
| title | impact | impactDescription | tags |
|---|---|---|---|
| Combine Multiple Array Iterations | LOW-MEDIUM | reduces iterations | javascript, arrays, loops, performance |
Combine Multiple Array Iterations
Multiple .filter() or .map() calls iterate the array multiple times. Combine into one loop.
Incorrect (3 iterations):
const admins = users.filter((u) => u.isAdmin);
const testers = users.filter((u) => u.isTester);
const inactive = users.filter((u) => !u.isActive);
Correct (1 iteration):
const admins: User[] = [];
const testers: User[] = [];
const inactive: User[] = [];
for (const user of users) {
if (user.isAdmin) admins.push(user);
if (user.isTester) testers.push(user);
if (!user.isActive) inactive.push(user);
}