mARTin
d92a8c7210
- 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.
33 lines
753 B
Markdown
33 lines
753 B
Markdown
---
|
|
title: Combine Multiple Array Iterations
|
|
impact: LOW-MEDIUM
|
|
impactDescription: reduces iterations
|
|
tags: 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):**
|
|
|
|
```typescript
|
|
const admins = users.filter(u => u.isAdmin)
|
|
const testers = users.filter(u => u.isTester)
|
|
const inactive = users.filter(u => !u.isActive)
|
|
```
|
|
|
|
**Correct (1 iteration):**
|
|
|
|
```typescript
|
|
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)
|
|
}
|
|
```
|