"use strict";

​

function all (...promises) {

   const outerPromise = new Promise((resolve, reject) => {

      let counter = 0;

      const values = [];

      let rejected = false;

      promises.forEach(

         (promise, idx) => {

           console.log('promise: ', promise);

            promise.then(val => {

                  console.log('promise.then handler', val);

                  counter++;

                  values[idx] = val;

                  if (counter === promises.length)

                     resolve(values);

               },

               () => {

                   console.log('reject handler - rejected', rejected);

                  if (!rejected) {

                     reject(new Error(`${promise} was rejected!`));

                     rejected = true;

                  }

               }

            );

         }

      );

   });

   return outerPromise;

};

const promise1 = Promise.resolve(3);

const promise2 = Promise.resolve(42);

const promise3 = new Promise(function(resolve, reject) {

  setTimeout(resolve, 100, 'foo');

});

​

all([/*promise1,*/ promise2, promise3]).then(function(values) {

  console.log(values);

}).catch(err => {

  console.log('error '+err.message)

});