object_manipulation.js

datamilestone = [
    {milestone_id:"Dog1", milestone_name:"Spot"},
    {milestone_id:"Cat1", milestone_name:"Tiger"},
    {milestone_id:"Dog2", milestone_name:"Rover"}, 
    {milestone_id:"Cat2", milestone_name:"Leo"}
];

datastage = [
    {kode:"Dog1", stage:1},
    {kode:"Cat2", stage:3}
];


//=============== object hasil groupby 

objstage = {
	"Dog1" : [{kode:"Dog1",stage:1}],
	"Cat2" : [{kode:"Cat2",stage:3}]
}


//masukan data obj ke datamilestone saat looping
for (var i = 0; i < datamilestone.rows.length; i++) {
	key = datamilestone.rows[i].milestone_id
  	datamilestone.rows[i].stage = obj[key]['stage']
}


//hasilnya
datamilestone = [
    {milestone_id:"Dog1", milestone_name:"Spot", stage:1},
    {milestone_id:"Cat1", milestone_name:"Tiger", stage:''},
    {milestone_id:"Dog2", milestone_name:"Rover", stage:''}, 
    {milestone_id:"Cat2", milestone_name:"Leo", stage:3}
];