7-ages.js

'use strict';

const ages = (persons) => {
  const ages = {};
  for (const personsKey in persons) {
    ages[personsKey] = persons[personsKey].died - persons[personsKey].born;
  }
  return ages;
};
const persons = {
  lenin: { born: 1870, died: 1924 },
  mao: { born: 1893, died: 1976 },
  gandhi: { born: 1869, died: 1948 },
  hirohito: { born: 1901, died: 1989 },
};
console.log(ages(persons));
module.exports = { ages };