async.eachSeries in node.js

Question

I have a loop in node.js

for (var i in files){
    var all = fs.readdirsync(\"./0\");
    async.eachSeries(all, function(item){
        check(it         


        

Answer 1

Outer loop needs to be async also. One of the the methods is to use 2 eachSeries loops or outer loop can be in parallel (each) if the files don't have to be processed in series:

var async = require('async');

async.eachSeries(files, function(file, outCb) 
{
  var all = fs.readFileSync(file);

  async.eachSeries(all, function(item, inCb) 
  {
    check(item);
    inCb(null);  // inner callback
  }, 
  function(err) 
  {
    outCb(null);  // outer callback
  });
},
function(err) 
{
  console.log('all done!!!');
});