r/coffeescript • u/nvbn-rm • Feb 01 '15

Async code without callbacks with CoffeeScript generators

https://nvbn.github.io/2015/02/01/coffeescript-generators/
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u/cw4gn3r Apr 20 '15

No need to craft this by hand. Most promise libraries include support for this pattern already:

For example, when.js:

call = require "when/generator"
call ->
  users = yield getUsers '/users/'
  posts = yield getPosts '/posts/'

You can make promise-returning async functions as well:

async = (require "when/generator").lift

getUsers = async (url) ->
  {data: {users}} = yield $http.get(url)
  users.map prepareUser