<article>
    <section>
        <h1>Hello bber!</h1>
    </section>
</article>

const promises = [
    new Promise(resolve =>
        setTimeout(_ => resolve(('bber!')), 10)
    ),
    new Promise(resolve =>
        setTimeout(_ => resolve(('Hello')), 0)
    ),
];

Promise.all(promises)
.catch(err => console.error(err))
.then(([b, a]) => console.log(`${a} ${b}`))

module Enumerable
  def cartesian(other)
    res = []
    each { |x| other.each { |y| res << [x, y] } }
    return res
  end
end

import System.Environment
import System.IO

isPrime :: Int -> Bool
isPrime n
    | n <= 1    = False
    | otherwise = not $ any (\x -> n `mod` x == 0) [2,3..(n-1)]