Q makeNodeResolver/nodeify

makeNodeResolver.js

defer.makeNodeResolver = function () {
    return function (err, res) {
        if (err) {
            this.reject(err);
        } else {
            this.resolve(res);
        }
    };
};

promise.nodify = function (callback) {
    this.then(function (res) {
        callback(null, res);
    });
    this.catch(function (err) {
        callback(err);
    });
};