Function to Change Task Status

Part of the Introduction To Luau section of Coddy's Lua journey — lesson 47 of 73.

Challenge

Easy

Your editor already contains the Task type, the tasks array and addTask from the previous lessons.

Create a function named completeTask that takes two parameters:

list of type {Task}
id of type number

The function should:

loop over list with ipairs looking for a task whose id matches
if found, set that task's done to true and return true
if no task matches, return false (return type boolean)

Then print, each on its own line:

the first task's done flag (before)
the result of completeTask(tasks, 1)
the first task's done flag (after)
the result of completeTask(tasks, 99)

Try it yourself

-- The shape every task in the manager must follow
type Task = {
    id: number,
    title: string,
    done: boolean,
}

-- The task list: a typed array of Task shapes
local tasks: {Task} = {
    {id = 1, title = "Learn Luau types", done = false},
    {id = 2, title = "Build a task manager", done = false},
    {id = 3, title = "Write tests", done = true},
}

-- Build a typed task with the next free id and insert it
local function addTask(list: {Task}, title: string): Task
    local newTask: Task = {
        id = #list + 1,
        title = title,
        done = false,
    }
    table.insert(list, newTask)
    return newTask
end

-- Add a task and inspect what came back
local added: Task = addTask(tasks, "Review the code")
print(#tasks)
print(added.id)
print(added.title)
print(added.done)