function_script.js

// V2 Function
// It should have a function to display todos
// It should have a function to add new todos
// It should have a function to change a todos
// It should have a function to delete a todos

var todos = ['item 1', 'item 2', 'item 3'];

// 1. It should have a function to display todos
function displayTodos(){ // Declare a function
  console.log('My Todos: ', todos);
}

displayTodos(); // Call a function

// 2. It should have a function to add new todos
function addTodos(todo){ // Declare a function which will take a single parameter
  todos.push(todo);
  displayTodos(); // function inside another function
}

addTodos('item 4'); // Call a function with a new todo
addTodos('item 5');

// 3. It should have a function to change a todos
function changeTodo(pos, newTodo){
  todos[pos] = newTodo;
  displayTodos();
}

changeTodo(0, 'item 1 updated');

// 4. It should have a function to delete a todos
function deleteTodo(pos){
  todos.splice(pos,1);
  displayTodos();
}

deleteTodo(0); // ["item 2", "item 3", "item 4", "item 5"]
deleteTodo(2); // ["item 2", "item 3", "item 5"]