var guid = 0;

function run() {

  guid++;

  var id = guid;

  return new Promise(resolve => {

    setTimeout(function () {

      console.log(id);

      resolve(id);

    }, (Math.random() * 1.5 | 0) * 1000);

  });

}

​

var promises = Array.from({ length: 10 }, run);

Promise.all(promises).then(console.log);