The Async Library

If we take a look for a moment at every control flow pattern we’ve analyzed so far, we’ll see that they can be used as a base to build reusable and more generic solutions. For example, we can wrap the unlimited parallel execution algorithm into a function that accepts a list of tasks, runs them in parallel, and invokes the given callback when all of them are complete. This way of wrapping control flow algorithms into reusable functions can lead to a more declarative and expressive way of defining asynchronous control ...