TypeScript async demo (NodeJS read-line)

app.ts

"use strict";

import * as Promise from "bluebird";
import { ReadLine, createInterface } from "readline";

const readLine = createInterface({
	input: process.stdin,
	output: process.stdout,
	terminal: false
});

const questionAsync = Promise.promisify<string, string>((question: string, callback: Function) => {
	readLine.question(question,
		callback.bind(null, null) // Ugh, signature mismatch.
	);
});

async function askQuestion(): Promise<string> {
	const result: string = await questionAsync("Tell me something: ");

	console.log(`Here's your something: '${result}'!`);

	return result;
}

askQuestion().then(answer => {
	console.log(`Entering classic main: '${answer}'.`);

	readLine.setPrompt("Tell me something I don't know: ", 32);

	readLine.on("line", line => {
		if (line) {
			console.log(`Line: '${line}'`);
			readLine.prompt();
		}
		else
			readLine.emit("end");
	}).on("end", () => {
		console.log("Done.");

		process.exit();
	});
	
	readLine.prompt();
});