map-obj 
Map object keys and values into a new object
Install
$ npm install --save map-obj
Usage
var mapObj = require('map-obj');
var newObject = mapObj({foo: 'bar'}, function (key, value, object) {
// first element is the new key and second is the new value
// here we reverse the order
return [value, key];
});
//=> {bar: 'foo'}
License
MIT © Sindre Sorhus