Promise stuff

promises.js

function hello(resolve) {
  // do whatever
  resolve();
}

function hello2(resolve) {
  // do whatever
  resolve();
}

function helloLast() {
  console.log('all done');
}

function runthisfirst() {
  return new Promise(function(resolve, reject) {
    hello(resolve);
    hello2(resolve);
  });
}

runthisfirst().then(() => {
  helloLast();
});