use of map to reorganize JSON object array in javascript

map.js

var data = [ 
{ 
"answer_content": "2322323", 
"user_id": 49, 
"user_name": "soemthing" 
}, 
{ 
"answer_content": "22222", 
"user_id": 50, 
"user_name": "soemthing" 
} 
];

var mapped = data.map(function(obj) {
  return {
    "answer_content": obj.answer_content,
         "author": {
           "user_id": obj.user_id,
           "user_name": obj.user_name
         }};
  
});

console.log(mapped);


///RESULT ///
[[object Object] {
  answer_content: "",
  author: [object Object] {
    user_id: 49,
    user_name: "soemthing"
  }
}, [object Object] {
  answer_content: "22222",
  author: [object Object] {
    user_id: 50,
    user_name: "soemthing"
  }
}]