javascript - Efficient way to change object key names -

i trying change object key names different. "name => text, _id => value"

i tried following works fine. wondering whether there better ways that?

var = {     name: "foo",     _id: "1234" };  var b = {     name: "bar",     _id: "222" };  var map = {     name: "text",     _id: "value", };  var arr = [a, b]; var arr2 = [];  _.each(arr, function (obj) {     obj = _.reduce(a, function (result, value, key) {         key = map[key] || key;         result[key] = value;         return result;     }, {});      arr2.push(obj); });  console.log(arr2); 

jsfiddle

if number of properties two, can map them manually.

var arr2 = _.map(arr, function (e) {   var o = {};   o[map.name] = e.name;   o[map._id] = e._id;   return o; }); 

sometimes, manually cleaner.

if want iterate on properties of given objects, then:

var arr2 = _.map(arr, function (e) {   var o = {};   (k in e) {     o[k] = e[k];   }   return o; }); 

those codes shorter , more readable original ones.