20 lines
494 B
JavaScript
20 lines
494 B
JavaScript
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;
|
|
};
|
|
|
|
module.exports = findTheOldest;
|