sublist.js

const sublistsOf = (list, number) => {
  const result = [];
  let aux = [];

  list.forEach(el => {
    if (aux.length >= number) {
      result.push(aux);
      aux = [];
    }
    aux.push(el);
  });

  if (aux.length > 0) {
    result.push(aux);
  }

  return result;
};