How to convert list to multidimensional array in angularjs?

Question

function ($scope, $http) {

$scope.selectFaIndex = 0;

$scope.SelectedAvailItems = [];

$scope.SelectedSelectedListItems = [];

$scope.DefaultListItems = [

[]

];

$scope.SelectedListItems = [

[]

];

$scope.AvailableListItems = [

[]

];

AllListofMainDivisionDesignation();

function AllListofMainDivisionDesignation() {

$http.get("MainDivisionDesignationMap/AllListofMainDivisionDesignation").then(function (t) {

$scope.List = t.data;

var inputObj = t.data;

angular.forEach(inputObj, function (value, key) {

this.DefaultListItems.push(key.DesignationName + ':' + value.DesignationName);

}, $scope.DefaultListItems[$scope.selectFaIndex]);

});

}

angular.copy($scope.DefaultListItems, $scope.AvailableListItems);

alert($scope.AvailableListItems);

$scope.btnRight = function () {

angular.forEach($scope.SelectedAvailItems, function (value, key) {

this.push(value);

}, $scope.SelectedListItems[$scope.selectFaIndex]);

//remove the ones that were moved.

angular.forEach($scope.SelectedAvailItems, function (value, key) {

for (var i = $scope.AvailableListItems[$scope.selectFaIndex].length - 1; i >= 0; i--) {

if ($scope.AvailableListItems[$scope.selectFaIndex][i].DesignationName === value.DesignationName) {

$scope.AvailableListItems[$scope.selectFaIndex].splice(i, 1);

}

}

});

$scope.SelectedAvailItems = [];

};

$scope.btnLeft = function () {

//move selected.

angular.forEach($scope.SelectedSelectedListItems, function (value, key) {

this.push(value);

}, $scope.AvailableListItems[$scope.selectFaIndex]);

//remove the ones that were moved from the source container.

angular.forEach($scope.SelectedSelectedListItems, function (value, key) {

for (var i = $scope.SelectedListItems[$scope.selectFaIndex].length - 1; i >= 0; i--) {

if ($scope.SelectedListItems[$scope.selectFaIndex][i].DesignationName === value.DesignationName) {

$scope.SelectedListItems[$scope.selectFaIndex].splice(i, 1);

}

}

});

$scope.SelectedSelectedListItems = [];

};

});

});