gistfile1.js

var todoApp;

todoApp = angular.module('todoApp', []);

todoApp.controller('TodoController', function ($scope) {
    $scope.todo = {
        user: 'Adam',
        items: [
            {name: 'Get the book', done: true},
            {name: 'Finish reading the book', done: false},
            {name: 'Summarize the book', done: false}
        ]
    };

    $scope.incompleteCount = function () {
        return $scope.todo.items.filter(function (item) {
            return !item.done;
        }).length;
    };

    $scope.warningLevel = function () {
        return $scope.incompleteCount() > 3 ? 'warning' : 'success';
    };
});