For-loop and async callback in node.js?

Question

I\'m new to JavaScript and to node.js. I want to loop through a directory and add all file stat (not other directories) to an array. As you see below there is a problem with

Answer 1

You are right about needing to use a closure. You should wrap the contents of the for loop in a self-invoking function to preserve the value of i for each iteration.

fs.readdir(SYNCDIR, function(err1, files) {
    var filesOnly = [];

    if(!err1) {

        for(var i = 0; i < files.length; i++) {

            (function(i) {
                var imgFilePath = SYNCDIR + '/' + files[i];
                fs.stat(imgFilePath, function(stat){
                    if (stat.isFile()){
                        filesOnly[i] = stat;
                    }
                });
            })(i);

        }
    }
});