js-pairs

Install

npm install @hexlet/pairs

Usage example

import {
  cons, car, cdr, toString, isPair,
} from '@hexlet/pairs';

const pair = cons(3, 5);

isPair(pair); // true

car(pair); // 3
cdr(pair); // 5

toString(pair); // (3, 5)

TypeScript

Full type definitions ship with the package:

import { cons, car } from '@hexlet/pairs'
import type { Pair } from '@hexlet/pairs'

const pair: Pair<number, string> = cons(1, 'hexlet')
const left = car(pair) // type: number

For more information, see the Full Documentation

Development

• npm test — run Vitest
• npm run lint — ESLint (JS + TS)
• npm run typecheck — strict TypeScript diagnostics
• npm run build — emit ESM artifacts to dist/

This repository is created and maintained by the team and the community of Hexlet, an educational project. Read more about Hexlet.