How to generate an Array or Set via callback from a recursive async function?

I am learning Node/Java Script and I am not very used to this level of async callback madness :DIn this first example, I traverse recursively through a defined folder until the maximum depth is reached. Then a callback is called which should write the current directory back into a member variable (Array). Unfortunately, the yielded container is always empty.How can my recursive function either return an Array with all the directories or write them via callback into a member variable?​var path = require('path'); var fs = require('fs'); function walk(full_path, callback, max_depth = 3, depth = 0) { if(depth > max_depth && max_depth > 0) { return; } fs.readdir(full_path, (err, files) => { if(err) { console.log(err, files); return; } files.forEach((file, index, array) => { var cur_path = path.join(full_path, file); fs.stat(cur_path, function(e, f) { if(e) { return; } callback(cur_path); if(f.isDirectory()) { walk(cur_path, callback, max_depth, (depth+1)); } }); }); }); } class FileSearch { constructor() { this._searchPath = ""; this._searchTag = ""; this._filesys = new Array; } } FileSearch.prototype.searchTag = function(search_tag) { this._searchTag = search_tag; } FileSearch.prototype.setPath = function(searchPath) { this._searchPath = searchPath; } FileSearch.prototype.getContent = function(max_depth = -1) { walk( this._searchPath, file => { console.log(file); this._filesys.push(file); }, max_depth ); console.log(this._filesys); } var test = new FileSearch; test.setPath("c:/Python"); test.getContent(3);

Submitted February 15, 2020 at 06:16PM by fogter66