1
Student
100%
Completion rate
users.js
Implement and export as default a function that takes a list of users and returns an object where the key is the birth year and the value is the number of men born that year.
Examples
const users = [
{ name: 'Bronn', gender: 'male', birthday: '1973-03-23' },
{ name: 'Reigar', gender: 'male', birthday: '1973-11-03' },
{ name: 'Eiegon', gender: 'male', birthday: '1963-11-03' },
{ name: 'Sansa', gender: 'female', birthday: '2012-11-03' },
{ name: 'Jon', gender: 'male', birthday: '1980-11-03' },
{ name: 'Robb', gender: 'male', birthday: '1980-05-14' },
{ name: 'Tisha', gender: 'female', birthday: '2012-11-03' },
{ name: 'Rick', gender: 'male', birthday: '2012-11-03' },
{ name: 'Joffrey', gender: 'male', birthday: '1999-11-03' },
{ name: 'Edd', gender: 'male', birthday: '1973-11-03' },
];
getMenCountByYear(users);
// {
// 1973: 3,
// 1963: 1,
// 1980: 2,
// 2012: 1,
// 1999: 1,
// };
Tips
- To extract the year from a date use the slice method
For full access to the challenge you need a professional subscription.
A professional subscription will give you full access to all Hexlet courses, projects and lifetime access to the theory of lessons learned. You can cancel your subscription at any time.