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

Assuming check accepts a callback, we can use mapSeries to achieve that.

async.mapSeries(files, function(file, outerCB) {
  var all = fs.readdirsync("./0");
  async.mapSeries(all, function(item, cb){
      check(item, cb);
  }, outerCB);
}, function(err, results) {
  // This is called when everything's done
});