JS — Arrays

Overview

Arrays store ordered lists of values.

What you'll learn

• push/pop
• map/filter
• find
• spread

Syntax

const a = [1,2,3];

Example

const nums = [1,2,3,4];
const doubled = nums.map(n=>n*2);
const even = nums.filter(n=>n%2===0);
console.log(doubled, even);

Notes

• Prefer map/filter for transformations.
• Use find for single match.

  Try: Open the Playground: /en/playground/html