3 ms·

were those in the language before or after node came out?

• bitwalker 13y ago
  async/await are just sugar over the much older asynchronous delegate pattern that has been in the language since day one. So yes, they were.
  • dsego 13y ago
    are they widely used in APIs to e.g. send a query to the sql database or open a file?
    • jussij 13y ago
      Yes. In .Net 4.5 there are Async versions of the web, file, stream, image and SQL category of functions. It's also making its way into ASP.Net layer.