Programatically select row in UI-Grid without listener

Question

I want to select all rows of a grid by default, and I managed to do so by adding a data listener in onRegisterApi as specified in this answer:

onRegisterApi : function(gridApi)
    {
      $scope.gridApi = gridApi; 
      $scope.gridApi.grid.registerDataChangeCallback(function(data)
        {
          $scope.gridApi.selection.selectRow($scope.gridOptions.data[0]);
        }, [uiGridConstants.dataChange.ROW]);
    }

Working plunkr: http://plnkr.co/edit/dzf6PZwKdZmSNvKzQeYH?p=preview

However, I don't understand why it doesn't work without a listener, like

onRegisterApi : function(gridApi)
    {
      $scope.gridApi = gridApi; 
        _.each($scope.gridOptions.data, function(companies, index){
          $scope.gridApi.selection.selectRow($scope.gridOptions.data[index]);
      });

    }

Non-working plunkr: http://plnkr.co/edit/XOliwXn2MLyH6nqO7pp4?p=preview

Can someone tell me why?

Answer 1

I used below code for angular 1.5.0 version. It is working for me.

app.controller('MainCtrl', ['$scope', '$http', '$interval', 'uiGridConstants','$location', function ($scope, $http, $interval, uiGridConstants, $location) { ...............

// $interval whilst we wait for the grid to digest the data we just gave it

$interval( function() {$scope.gridApi.selection.selectRow($scope.gridOptions.data[0]);}, 0, 1);