Enhanced Promises

enhancedPromises.js

function enhancePromise(promise, isCollection) {
    promise.call = angular.bind(promise, promiseCall);
    promise.get = angular.bind(promise, promiseGet);
    return promise;
}

function promiseCall(method) {
    var deferred = $q.defer();
    var callArgs = arguments;
    this.then(function(val) {
        var params = Array.prototype.slice.call(callArgs, 1);
        var func = val[method];
        var result = func.apply(val, params);
        deferred.resolve(result);
    });
    return enhancePromise(deferred.promise);
}

function promiseGet(what) {
    var deferred = $q.defer();
    this.then(function(val) {
        deferred.resolve(val[what]);
    });
    return enhancePromise(deferred.promise);
}