将json的一部分提取到另一个对象中，并保持两者之间的链接

Question

{
   "data": [
      {
         "date": "2013-03-07",
         "id": "2",
         "vt_color": "#548dd4",
         "vt_name": "follow up",
         "duration": "20",
         "time_booked": "12:00:00",
         "stats": "booked",
         "doctor_id": "00002",
         "patient_id": "00003"
      },
      {
         "date": "2013-03-08",
         "id": "3",
         "vt_color": "#76923c",
         "vt_name": "ultrasound",
         "duration": "30",
         "time_booked": "08:00:00",
         "stats": "booked",
         "pt_name": "demo patien",
         "dr_name": "Momen Alzalabany",
         "doctor_id": "00002",
         "patient_id": "00009"
      }
   ] 
}

what i want is to create another array out of this including vt_name,vt_color and index of data so i use jquery

var words = [];

$.each(arr['data'],function(ref){
    words[this.doctor_id].push({name: this.vt_color,color: this.vt_name,index:ref});
});
console.log(koko);

FAIL : words[this.do_id] is not defined....

how can i do this ? i want outcome to be

sorry i'm a newbie with json/js

i want outcome in php would be

['00002'=>[
            ['name'=>'follow up','color'=>'#548dd4',index=>[0,3,4]],
            ['name'=>'ultrasound','color'=>'#769dd4',index=>[1,5,8]]
          ]
 ]

Answer 1

1. Change the type of words to object (not array), since you want a map with a string (eg '00002') as key:

    var words = {}; 

2. You want do add to an array which does not exist. You need to create it first:

    words[this.doctor_id] = words[this.doctor_id] || []; // creates an array if not already existing words[this.doctor_id].push({name: this.vt_color,color: this.vt_name,index:ref});