Function map

keys.js:67–78

* Map values in the supplied object's keys * @param {Promise|object} object or promise for object whose key-value pairs * will be reduced * @param {function(value:*, key:String):*} f mapping function which may * return either a promise or a value * @returns {Promise} promise for an objec

(object, f)

	 *  resolved key-value pairs
	 */
	function map(object, f) {
		return toPromise(object).then(function(object) {
			return all(Object.keys(object).reduce(function(o, k) {
				o[k] = toPromise(object[k]).fold(mapWithKey, k);
				return o;
			}, {}));
		});

		function mapWithKey(k, x) {
			return f(x, k);
		}
	}

	/**
	 * Resolve all key-value pairs in the supplied object and return a promise