vikas grepper

obj=[{
  id:"1",
 email:"a1",
 name:"aaaa" 
},{
  id:"2",
 email:"b1",
 name:"bbbbb" 
},{
  id:"2",
 email:"b2",
 name:"b2b2b2" 
},{
  id:"3",
 email:"31",
 name:"cccc" 
},{
  id:"3",
 email:"32",
 name:"cccc2" 
},{
  id:"3",
 email:"33",
 name:"ccycc3" 
},{
  id:"3",
 email:"34",
 name:"ccucc4" 
},{
  id:"4",
 email:"41",
 name:"aa444aa" 
},{
  id:"5",
 email:"51",
 name:"aaxcvdsadaa" 
},{
  id:"5",
 email:"52",
 name:"aaadsdsadasa" 
}]

var list=["8"];

var count=0;
for (let i=0;i<obj.length;i++){
  for(let j=i+1;j<obj.length-1;j++){
    console.log(i,j)
    if(!list.includes(obj[i].id)){        
        list.push(obj[i].id); 
        if(obj[i].id==obj[j].id){
          obj[i].email=[obj[i].email,obj[j].email]
          console.log(i,j,"asdsad")
        }
    }
   }
}



console.log(list)
console.log(obj)