Array Methods

👨‍💼 Great! You can now modify arrays with built-in methods.

🦉 More useful array methods:

const arr = [1, 2, 3, 4, 5]

// Find index of an element
arr.indexOf(3) // 2

// Remove elements at index
arr.splice(1, 2) // Removes 2 elements starting at index 1

// Join array into string
arr.join(', ') // "1, 2, 3, 4, 5"

// Check if it's an array
Array.isArray(arr) // true

// Create a copy
const copy = [...arr] // Spread operator

Methods like push, pop, splice mutate (modify) the original array. Later you'll learn methods like map and filter that return new arrays without modifying the original.

05. Arrays/02. Array Methods (🏁 solution)

Array Methods