Most elegant way of recursively get all files from folder

walk.js

function walk(dir) {

  var results = [];

  fs.readdirSync(dir).forEach(function(file) {

    file = dir+'/'+file;
    var stat = fs.statSync(file);

    if (stat && stat.isDirectory()) {
        results = results.concat(walk(file))
    } else results.push(file);

  });

  return results;

}