public List<TodoItem> filterTodoItemsByIncompletion() {

		for(int i=0;i<todoItems.size();i++) {
			if(!todoItems.get(i).isCompleted()) {
				tmp.add(todoItems.get(i));
			}
		}
		return tmp;
	}

	// EFFECTS: returns a list of to-do items whose title and/or description
	// contains the search parameter
	// Note: String comparisons are case sensitive
	public List<TodoItem> filterTodoItemsBySearchTerm(String searchString) {


		ArrayList<TodoItem> tmp=new ArrayList<TodoItem>();
		for(int i=0;i<todoItems.size();i++) {
			if(todoItems.get(i).title.contains(searchString)
					|| todoItems.get(i).description.contains(searchString)) {
				tmp.add(todoItems.get(i));
			}
		}
		return tmp;
	}