List files in a directory asynchronously using async generators in ES7.

ls-es7-async.js

/**
 * My first foray into the land of ES7.
 *
 * We had an interesting challenge in our office of using node to output the files
 * in a given directory and it's subdirectories and sort them.
 *
 * We had some very interesting solutions from using co-routines to
 * pub/subs from an a wide variety of engineers from C developers to front-enders.
 *
 * Here's my solution using some ES7 features.
 * 
 * You can run this in traceur but you'll need the experimental flag
 * and a library to promisify node's fs lib. You'll need to polyfill Array.from
 * which I haven't tested yet.
 */

 
async function* ls(path) {
    let files = await fs.readdir(path);
 
    for (let file of files) {
        let subPath = `${path}/${file}`,
            stat = await fs.lstat(subPath);
 
        if (stat.isDirectory()) {
            yield* ls(subPath);
        } else {
            yield subPath;
        }
    }
}
 
(async function() {
  console.log(Array.from(ls(process.cwd())).sort().join("\n")); // untested, not supported yet, could polyfil
})();