Clone an array

JavaScript

// `arr` is an array
const clone = (arr) => arr.slice(0)

// Or
const clone = (arr) => [...arr]

// Or
const clone = (arr) => Array.from(arr)

// Or
const clone = (arr) => arr.map((x) => x)

// Or
const clone = (arr) => JSON.parse(JSON.stringify(arr))

// Or
const clone = (arr) => arr.concat([])

// Or
const clone = (arr) => structuredClone(arr)

TypeScript

// `arr` is an array
const clone = <T,_>(arr: T[]): T[] => arr.slice(0)

// Or
const clone = <T,_>(arr: T[]): T[] => [...arr]

// Or
const clone = <T,_>(arr: T[]): T[] => Array.from(arr)

// Or
const clone = <T,_>(arr: T[]): T[] => arr.map((x) => x)

// Or
const clone = <T,_>(arr: T[]): T[] => JSON.parse(JSON.stringify(arr))

// Or
const clone = <T,_>(arr: T[]): T[] => arr.concat([])

// Or
const clone = <T,_>(arr: T[]): T[] => structuredClone(arr)