JavaScript Array Methods — a practical guide to JavaScript array methods with clear examples you can reuse in real projects.
JavaScript Tutorial Series (34/101). Prefer one article? Read the complete JavaScript tutorial.
Short description
Prefer immutable patterns (map/filter) over mutating when sharing state.
Array methods
const nums = [1, 2, 3, 4];
const evens = nums.filter((n) => n % 2 === 0);
const doubled = nums.map((n) => n * 2);
const sum = nums.reduce((a, n) => a + n, 0);