clearCompleted() {
     var toClear = {};
     this.todoService.list.forEach((todo) => {
         if(todo.completed) {
             toClear[todo._key] = null;
         }
     });
     this.todoService.bulkUpdate(toClear);
 }

 doneEditing($event, todo) {
     var which = $event.which;
     var target = $event.target;
     if(which === 13) {
         todo.title = target.value;
         this.todoService.save(todo);
         this.todoEdit = null;
     } else if (which === 27) {
         this.todoEdit = null;
         target.value = todo.title;
     }
 }

    addTodo($event, newTodo){
        if($event.which === 13) {

            this.todoService.add({
                title: newTodo.value,
                completed: false
            });

            newTodo.value = '';

        }
    }

    clearChecked(){
        var toClear = {};

        this.todoService.list.forEach(todo => {
            if(todo.completed) {
                toClear[todo._key] = null;
            }
        });

        this.todoService.bulkUpdate(toClear);

        this.bulkCheckState = false;
    }

 this.todoService.list.forEach((todo)=> {
     todo.completed = isComplete;
     this.todoService.save(todo);
 });

 deleteMe(todo) {
     this.todoService.remove(todo);
 }

 completeMe(todo) {
     todo.completed = !todo.completed;
     this.todoService.save(todo);
 }

 addTodo(newTitle) {
     this.todoService.add({
         title: newTitle,
         completed: false
     });
 }

 removeTodo(todo){
     this.todoService.remove(todo);
 }

 toggleCheck(todo){
     todo.completed = !todo.completed;
     this.todoService.save(todo);
 }