collect.js

var async = require('async');
var _ = require("underscore");
var range = _.range(0, 23);

var collect = function(callback){
  return function(){
    var args = Array.prototype.slice.call(arguments);
    args.unshift(null);
    return callback(null, args);
  }
}

async.map(range, function(number, callback){
  var callback = collect(callback);
  if(number % 2) return callback(new Error("is odd"), number);
  return callback(null, number);
}, function(err, results){
  console.log(err);
  console.log(results);
});