[рони]

NovichokJS,

class User {
  constructor(id, name, sessionId) {
    this.id = id;
    this.name = name;
    this.sessionId = sessionId;
  }
}

class UserRepository {
  users = [];
  constructor(users) {
    this.users.push(...users);
  }


  getUserNames() {
    return this.users.map(({name}) => name);
  }

  getUserIds() {
    return this.users.map(({id}) => id);
  }

  getUserNameById() {
    return this.users.map(({sessionId}) => sessionId);
  }
}

// examples
const user = new User('1', 'Jack', 'session-id');
const user2 = new User('2', 'Jack2', 'session-id2');


const repository = new UserRepository([user, user2]);
console.log(repository.getUserNames())