notes/node_modules/map-obj/index.js

'use strict';
module.exports = function (obj, cb) {
	var ret = {};
	var keys = Object.keys(obj);

	for (var i = 0; i < keys.length; i++) {
		var key = keys[i];
		var res = cb(key, obj[key], obj);
		ret[res[0]] = res[1];
	}

	return ret;
};