javascript - Angular2: How to edit a field -

i'm building contact list app user can add contact using input field getting data, i'm done adding , delete contact i'm confused how edit added contact clicking button next added contact, situation click on edit button , contact in input field edit contact , click on update button , edited contact there in list of contact, may -ve voting want see how happen contact in input field edit.

here wrote taking id argument

updateparent(value){     for(var = 0; < this.array.length ; i++){     console.log('inside for');     if(value == this.array[i].idobj){          break;         } } 

what next after if? :)

html of parent:

<h1 class= "text-center">todo app</h1> <div class = "form-group"> <lable>task</lable> <input name = "tasks" #task class = "form-control" > <lable>detail</lable> <input type = "text" name = "taskdetail" #detail class = "form-control"  > <button type = "submit" class  = "btn btn-default"  (click) = "addtask(task, detail)">add task</button> <child-component *ngfor = "#todo of array"  [taskobject] = "todo"   (childevent) = "deleteparent($event)"> loading...   </child-component> </div>  

html of child component display data catched parent :

{{taskobject.taskobj}} {{taskobject.detailobj}} {{taskobject.idobj}} <button type = "button" class = "btn btn-default"  (click) =   "deletetask(taskobject.idobj)">delete</button> <button type = "button" class = "btn btn-defualt" (click) = "updatetask(taskobject.idobj)">update</button>  ` 

if contact number 1 value in array match existing value contact , when got value of index( or i) match splice value array , update new value in array using push method. this:

updateparent(value){     for(var = 0; < this.array.length ; i++){     console.log('inside for');     if(value == this.array[i].idobj){         this.array.splice(i,1);         var newcontact = value         this.array.push(value);              break;         } } 

hope ! if not provide plnkr code make correct !