mpromise when

when.js

var mongoose = require('mongoose');
var Deferred = require("JQDeferred");
var _ = require("lodash");

function when() {

	var arrayOfPromises = _.isArray(arguments[0]) ? arguments[0] : arguments;
	var dfds = _.map(arrayOfPromises,function(promise){
		var dfd = new Deferred();

		promise.exec(function(err,result){
			if(err){
				dfd.reject([err,result]);
			} else {
				dfd.resolve(result);
			}
		});

		return dfd;
	});
	return Deferred.when.apply(null,dfds);
};