use single method to calculate age from multiple input field

Question

This is my code to calculate age.I am using same method for multiple inputs in ng-change .
but I can bind age for only one input field using single method.
Why don't I use single method to bind result data for multiple inputs based on model name?

 var app = angular.module('myApp', []) app.controller('myController', function($scope) { $scope.calculateAge = function (fieldName,value) {debugger var birthDay =value; var DOB = new Date(birthDay); var today = new Date(); var age = today.getTime() - DOB.getTime(); age = Math.floor(age / (1000 * 60 * 60 * 24 * 365.25)); fieldName=age; //$scope.data1.age=age; } }) 

 <script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script> <script src="https://ajax.googleapis.com/ajax/libs/angularjs/1.2.23/angular.min.js"></script> <div ng-app="myApp" ng-controller="myController" ng-init="init()"> <div> <input type="date" ng-model="data1.dob" ng-change="calculateAge(data1.age,data1.dob)"/> <input type="text" ng-model="data1.age"/> </div> <div> <input type="date" ng-model="data2.dob" ng-change="calculateAge(data2.age,data2.dob)"/> <input type="text" ng-model="data2.age"/> </div> </div> 

I know I can to do by passing input Id's. but am trying it for model name.

Answer 1

just try this: $scope[fieldName] =age;

var app = angular.module('myApp', [])
app.controller('myController', function($scope) {

     $scope.calculateAge = function (fieldName,value) {debugger
        var birthDay =value;
        var DOB = new Date(birthDay);
        var today = new Date();
        var age = today.getTime() - DOB.getTime();
        age = Math.floor(age / (1000 * 60 * 60 * 24 * 365.25));

        //fieldName=age;
        $scope[fieldName] =age;// $scope[value] is eq. to $scope.data2.age
    }
})

Answer 2

You have to pass references of your data in the method and modify that.

 var app = angular.module('myApp', []) app.controller('myController', function($scope) { $scope.calculateAge = function (data) {debugger var birthDay = data.dob; var DOB = new Date(birthDay); var today = new Date(); var age = today.getTime() - DOB.getTime(); age = Math.floor(age / (1000 * 60 * 60 * 24 * 365.25)); data.age = age; } }) 

 <script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script> <script src="https://ajax.googleapis.com/ajax/libs/angularjs/1.2.23/angular.min.js"></script> <div ng-app="myApp" ng-controller="myController" ng-init="init()"> <div> <input type="date" ng-model="data1.dob" ng-change="calculateAge(data1)"/> <input type="text" ng-model="data1.age"/> </div> <div> <input type="date" ng-model="data2.dob" ng-change="calculateAge(data2)"/> <input type="text" ng-model="data2.age"/> </div> </div>