My-Weekly-ToDo-List/.opencode/skills/web-design-guidelines/react-best-practices/rules/js-combine-iterations.md
mARTin d92a8c7210 feat: add task actions (notes/delete) and refine animation logic
- Added 'onDelete' and 'onNotes' support to TaskItem.
- Implemented hover actions (Delete and Notes icons) for tasks.
- Added Notes Modal for editing task markdown content.
- Simplified navigation animation to remove blank flash (single-phase slide-in).
- Fixed syntax error in updateTask function.
- Updated styles for modal and task actions.
2026-02-01 12:25:53 +01:00

753 B

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)
}