'use strict'; const data = [ ['Marcus Aurelius', '121-04-26', 'Rome'], ['Commodus Antoninus', '161-08-31', 'Rome'], ['Victor Glushkov', '1923-08-24', 'Rostov on Don'], ['Ibn Arabi', '1165-11-16', 'Murcia'], ['Mao Zedong', '1893-12-26', 'Shaoshan'], ['Rene Descartes', '1596-03-31', 'La Haye en Touraine'] ]; class Person { get name() { return this[0]; } get birth() { return this[1]; } get city() { return this[2]; } get age() { const difference = new Date() - new Date(this.birth); return Math.floor(difference / 31536000000); } toString() { return this.name + ' age is ' + this.age; } } const query = (person) => ( person.name !== '' && person.age > 18 && person.city === 'Rome' ); console.dir(data); data.forEach((person) => { Object.setPrototypeOf(person, Person.prototype); // person.__proto__ = Person.prototype }); const res = data.filter(query); console.log(res.join('\n'));