node.js async libs

Question

There are a ton of libraries that help with fixing the layers of callback syndrome.

In fact, there's too many, which one do i use?

Answer 1

I use Async.js.

Async is a utility module which provides straight-forward, powerful functions for working with asynchronous JavaScript. Although originally designed for use with node.js, it can also be used directly in the browser.

Examples

async.map(['file1','file2','file3'], fs.stat, function(err, results){     // results is now an array of stats for each file });  async.filter(['file1','file2','file3'], path.exists, function(results){     // results now equals an array of the existing files });  async.parallel([     function(){ ... },     function(){ ... } ], callback);  async.series([     function(){ ... },     function(){ ... } ]);