typescript code snippets 05

interface Book {
  type: "book";
  isbn: string;
  page: number;
}
interface Movie {
  type: "movie";
  lengthMinutes: number;
}
let hobby: Movie = { type: "movie", lengthMinutes: 120 };
function showHobby(hobby: Book | Movie): void {
  if (hobby.type === "movie") {
    console.log("Long movie of " + hobby.lengthMinutes);
  } else {
    console.log("A book of few pages: " + hobby.page);
  }
}