vary_basic_koa_argument.md

you know how to use Express middleware

app.get(‘/‘, function(req, res) {
  var someVar1;
  promisesomeshit()
    .then(function(someshit){
      someVar1 = someshit;
      return promiseSomeOtherShit();  
    })
    .then(function(otherShit){
      res.status(200).send(otherShit + someVar1)
    });
});

well in Koa you write that shit out:

app.get(‘/‘, function* () {
  let someshit = yield promisesomeshit();
  let someMoreShit = yield promiseSomeOtherShit();
  this.body = someshit + someMoreShit;
});