promises

let r;
const runTasks = (...tasks) => Promise.all(tasks.map(t => {
  "use strict";
  debugger;
})).then((r)=> {
  console.log(r);
  return r;
})

const tA = () => new Promise(r => setTimeout(()=> r('A'), 1000))
const tB = () => new Promise(r => setTimeout(()=> r('B'), 100))
const tC = () => new Promise(r => setTimeout(()=> r('C'), 100))

r =  runTasks(tA, tB, tC);


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