JSFiddle - React, Tailwind, and code Playground

HTML

<div ng-app="DemoApp" ng-controller="DemoController">
    <select data-ng-model="printValue">
        <option value="">Print options</option>
        <option ng-repeat="key in notSorted(numArr)" ng-init="value = numArr[key]" value="{{key}}">{{value}}</option>
    </select>
    {{printValue}}
</div>

JavaScript

var DemoApp = angular.module("DemoApp", []);
 DemoApp.controller("DemoController",

 function DemoController($scope) {
     $scope.numArr = {};
     for (var x = 1; x <= 15; x++) {
         x = parseInt(x);
         $scope.numArr[x] = x;
     }

     $scope.notSorted = function (obj) {
         if (!obj) {
             return [];
         }
         return Object.keys(obj);
     }
 });