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Clone an array

Written byPhuoc Nguyen

Category

Array

Created

07 May, 2020

Last updated

27 Jun, 2022

Contributors

JavaScript version

clone.js

// `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 version

clone.ts

// `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);

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Phước Nguyễn

Clone an array

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