Angular: select with JS array

http://angularjs.org/

HTML

<div ng-controller="MyCtrl">
  <select ng-model="model" ng-change="setItemsPerPage(model)" ng-options="value for value in options"></select>
    
</div>

JavaScript

function MyCtrl($scope) {
    $scope.model = 30;
    $scope.options = [10, 20, 30,40,50];
    
    $scope.setItemsPerPage = function(num) {
    alert( num);
  }
}