Function _parallel

public/javascripts/async.js:713–728

(eachfn, tasks, callback)

    };

    function _parallel(eachfn, tasks, callback) {
        callback = callback || noop;
        var results = _isArrayLike(tasks) ? [] : {};

        eachfn(tasks, function (task, key, callback) {
            task(_restParam(function (err, args) {
                if (args.length <= 1) {
                    args = args[0];
                }
                results[key] = args;
                callback(err);
            }));
        }, function (err) {
            callback(err, results);
        });
    }

    async.parallel = function (tasks, callback) {
        _parallel(async.eachOf, tasks, callback);