WIP - Loop over second level

https://stackoverflow.com/questions/12083884/group-by-in-json-on-second-level-array

by katalin_2003

JavaScript

Array.prototype.groupBy = function(keyName) {
  var res = {};
    this.forEach(function(x) {
       var k = x[keyName];
        if(!k){
           recursiveFind(x, keyName, x, 0);
        }else {
           var v = res[k];
           if (!v) v = res[k] = [];
           v.push(x);  
        }            
    })
        
    function recursiveFind(val, keyName, orig, max) {
        if (val && max < 3) {
            if ( val instanceof Array) {
               val.forEach(function(x) { recursiveFind(x, keyName, orig, max+1)});  
            } else if ( val.toString() == "[object Object]") {
               console.log("res" + res);
               var k2 = val[keyName];
               if (!k2) {
                   for(var i in val) {
                      recursiveFind(val[i], keyName, orig, max+1);
                   }                       
               } else {
                   if(!res[k2]) {
                       res[k2] = [];
                   }
                   res[k2].push(orig);
               }                         
            }   
          
        } 
      }
    
      
  return res;
};
               
 
      

var myObject = {
   "Category":{
      "old_modi":1,
      "new_modi":1,
      "FORM":[
         {
            "name":"OPP1",
            "date":"08/08/2012",
            "probability":"10",
            "PERSON":[
               {
                  "ID": 1,
                  "author":"TQ"
               }
            ]
         },
         {
            "name":"OPP2",
            "date":"08/08/2012",
            "probability":"30",
            "PERSON":[
               {
                  "ID": 2,
                  "author":"LifeLine"
               }
            ]
         },
         {
            "name":"OPP3",
            "date":"08/08/2012",
            "probability":"30",
            "PERSON":[
               {
                  "ID": 1,
                  "author":"TQ"
               }
            ]
         }
    
      ]
  ...