Non fixed Number of Items for a "To Do List Contract" Example

In this example i will be using an array in storage compared to the Previous Post of a Fixed Number of items in the Array

pragma solidity ^0.4.0;

contract ToDoAreshFlexible{
    //Declare a struct similar to C++ holding details of a single ToDo Item
    struct Item{
        string task;
        uint priority;
    }
    
    //An Array of structs similar to C++ (flexible storage) and index start at 0
    Item[] ToDoList;
    
    //this is a constructor, notice it has the same name as the Contract name
    function ToDoAreshFlexible() public {
    }
    
    //Adds an item to the list using PUSH
    function AddToDo(string _task, uint _priority) public
    {
        ToDoList.push(Item(_task,_priority));
    }
    
    //returns a single item given an index since it requires more gas to iterate thru 
    function getToDoList(uint _index) public returns(string ){
        return ToDoList[_index].task;
    }
}