const findTheOldest = function(array) { return array.reduce((oldest, currentPerson) => { const oldestAge = getAge(oldest.yearOfBirth, oldest.yearOfDeath); const currentAge = getAge( currentPerson.yearOfBirth, currentPerson.yearOfDeath ); return oldestAge < currentAge ? currentPerson : oldest; }); }; const getAge = function(birth, death) { if (!death) { death = new Date().getFullYear(); } return death - birth; }; // Do not edit below this line module.exports = findTheOldest;