example of JavaScript "coroutines" in practice

using_async.js

var async = require('async');

async.waterfall([
  Foo.create.bind(Foo, fooId, false),
  function(foo, cb) {
    Bar.create(barId, '0000000000000001', false, null, utils.randomID(12), cb);
  },
  function(result, cb) {
    Baz.create('baz_'+utils.randomID(4), true, 1, 'hello, world', cb);
  },
  function(baz, cb) {
    var thingy = new Thingy({id: thingyId});
    thingy.associateWithBaz(baz.id, baz.account_id, cb);
  },
  function(cb) {
    var message = { command: 'hello', arch: 4 };
    something.handle(message, cb);
  },
], function(err, result) {
  test.ok(!err, err);
  test.done();
});