Function taskCallback

deps/async.js:360–370

(err)

        _forEach(keys, function (k) {
            var task = (tasks[k] instanceof Function) ? [tasks[k]]: tasks[k];
            var taskCallback = function (err) {
                if (err) {
                    callback(err);
                    // stop subsequent errors hitting callback multiple times
                    callback = function () {};
                }
                else {
                    completed.push(k);
                    taskComplete();
                }
            };
            var requires = task.slice(0, Math.abs(task.length - 1)) || [];
            var ready = function () {
                return _reduce(requires, function (a, x) {