extends-basic.ts

interface PersonDetails {
  name: string
  age: number
}

interface Member extends PersonDetails {
  memberId: string
}

interface TicketHolder extends PersonDetails {
  ticketNumber: string
}

const member: Member = {
    memberId: "123",
    name: "Jesse",
    age: 31
}

const ticketHolder: TicketHolder = {
  ticketNumber: "123abc",
  name: "Jesse",
    age: 31
}