Use Array.find() Instead of filter()[0]

Problem

Using filter() to find a single item processes the entire array unnecessarily.

Solution

Use Array.find() which stops at the first match, improving performance.

Benefit

Up to 100x faster for large arrays and makes intent clearer.

Code Example

const users = [{id: 1, name: 'John'}, {id: 2, name: 'Jane'}];

// Inefficient:
const user = users.filter(u => u.id === 2)[0];

// Efficient:
const user = users.find(u => u.id === 2);