Created using remix-ide: Realtime Ethereum Contract Compiler and Runtime. Load this file by pasting this gists URL or ID at https://remix.ethereum.org/#version=soljson-v0.5.12+commit.7709ece9.js&optimize=false&runs=200&gist=

contracts...18_Struct.sol

pragma solidity 0.5.12;

contract Struct {
    struct Todo {
        string text;
        bool completed;
    }

    Todo[] public todos;

    function createToDo(string memory _text) public {
      todos.push(Todo(_text, false));
    }

    function createToDo2(string memory _text) public {
        todos.push(Todo({text: _text, completed: false}));
    }

    function createToDo3(string memory _text) public {
        Todo memory todo;
        todo.text = _text;
        todos.push(todo);
    }


    function getTodo(uint _index) public view returns (string memory, bool) {
      Todo storage todo = todos[_index];
      return(todo.text, todo.completed);
    }

    function updateText(uint _index, string memory _text) public {
        Todo storage todo = todos[_index];
        todo.text = _text;
    }

    function toggleComplete(uint _index) public {
        Todo storage todo = findTodo(_index);
        todo.completed = !todo.completed;
    }

    function findTodo(uint _index) internal view returns(Todo storage) {
       Todo storage todo = todos[_index];
       return(todo);
    }

    // toggleComplete
}