import {Book} from "./interfaces"; export type Books = Array; export function booksTest() { let poetryBooks: string[] = ['a']; let fictionBooks: Array = ['b']; let historyBooks = new Array(5); // Forbidden // let historyBooks: Books = new Books(5); console.log(poetryBooks, fictionBooks, historyBooks); } export function LogAndReturn(thing: T): T { console.log(thing); return thing; }