Whats the smartest / cleanest way to iterate async over arrays (or objs)?

Question

Thats how I do it:

function processArray(array, index, callback) {
    processItem(array[index], function(){
        if(++index === array.length) {
                  


        

Answer 1

The easiest way to handle async iteration of arrays (or any other iterable) is with the await operator (only in async functions) and for of loop.

(async function() {
 for(let value of [ 0, 1 ]) {
  value += await(Promise.resolve(1))
  console.log(value)
 }
})()

You can use a library to convert any functions you may need which accept callback to return promises.