This approach is perfect for the is-even npm package[1], with 196,023 weekly downloads, or the is-odd npm package[2], with 285,501 weekly downloads. Wouldn't it be cool if you type `npm install` and it starts downloading a 40GB is-even and a 40GB is-odd?
[1] https://www.npmjs.com/package/is-even
[2] https://www.npmjs.com/package/is-odd