Common patterns for asynchronous code, minimalistic version (async-mini)

If you only need async.series() and async.parallel() in the most simplest, stable and predictable form, then this module is for you.

Update for 2.x: series() now supports its first argument to be an object, in which case the result comes back as an object, keyed by the same keys as the argument — this is the same behavior as parallel() has. The usage with array is unaffected.

Usage

npm install async-mini

var async = require('./async-mini');
 
var arr = [
    function(cb) {
        cb(null, 'arr 1');
    },
    function(cb) {
        cb(null, 'arr 2');
    }
];
 
var obj = {
    one: function(cb) {
        cb(null, 'obj 1');
    },
    two: function(cb) {
        cb(null, 'obj 2');
    }
};
 
async.series([
 
    function(cb) {
        async.series(arr, cb);
    },
    function(cb) {
        async.series(obj, cb);
    },
    function(cb) {
        async.parallel(arr, cb);
    },
    function(cb) {
        async.parallel(obj, cb);
    }
 
], function(err, res) {
 
    console.log(JSON.stringify(res, null, '  '));
});

The above code will print:

[
  [
    "arr 1",
    "arr 2"
  ],
  {
    "one": "obj 1",
    "two": "obj 2"
  },
  {
    "0": "arr 1",
    "1": "arr 2"
  },
  {
    "one": "obj 1",
    "two": "obj 2"
  }
]