Question

I have an object array like this

[
      {bookName:"javascript",authorName:"john"},
      {bookName:"java",authorName:"peter"},
      {bookName:"j2ee",authorName:"john"},
      {bookName:".net",authorName:"peter"},
      {bookName:"oracle",authorName:"peter"}];

I tried the logics but i didnt get correctly.I want to sort out like this..

{
peter:{
    [{bookName:"java",authorName:"peter"},

    {bookName:".net",authorName:"peter"},

    {bookName:"oracle",authorName:"peter"} ]

     } ,
john :{
    [{bookName:"j2ee",authorName:"john"},

    {bookName:"javascript",authorName:"john"}]

    }

}.

how can i do that.. Thanks in Advance ..

var obj={};
var objArr = given objectarray;
for(var i=0;i<objArr.length.i++ ){
  objArr[objArr[i].authorName]=objArr[i];    
}

and

var obj={};
var objArr = given objectarray;
for(var i=0;i<objArr.length.i++ ){
  var arr=[];
  objArr[objArr[i].authorName]=arr.push(objArr[i]);    
}

Answer 1

You could do this:

var b = ... your object ...
var m = {};
b.map(function(v){(m[v.authorName]=m[v.authorName]||[]).push(v)});

Demonstration (open the console)