C#•14mo ago

✅ Using an async method to print contents of an array

I'm trying to make a simon game and the next step I've decided on is that I need a method to draw the simon map. I'm using an async method so that I can delay the time in which it takes to show the next map, but when I call the method it only shows the first map. When I use the code without putting it inside a method, it works fine. I don't understand what I'm doing wrong:

19 Replies

GIGA BRAIN•14mo ago

https://paste.mod.gg/ceosbjyrsfsv/0

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n8ta•14mo ago

Can you include the code here?

GIGA BRAIN•14mo ago

sure

GIGA BRAIN•14mo ago

message.txt

GIGA BRAIN•14mo ago

// Prints every map after a delay of one second
//foreach (string s in Renders)
//{
//    Console.WriteLine(s);
//    await Task.Delay(1000);
//    Console.Clear();
//}
//Console.WriteLine("Complete!");


async Task DrawMap()
{
    foreach (string s in Renders)
    {
        Console.WriteLine(s);
        await Task.Delay(1000);
        Console.Clear();
    }
    Console.WriteLine("Complete!");
}


DrawMap();

// Prints every map after a delay of one second
//foreach (string s in Renders)
//{
//    Console.WriteLine(s);
//    await Task.Delay(1000);
//    Console.Clear();
//}
//Console.WriteLine("Complete!");


async Task DrawMap()
{
    foreach (string s in Renders)
    {
        Console.WriteLine(s);
        await Task.Delay(1000);
        Console.Clear();
    }
    Console.WriteLine("Complete!");
}


DrawMap();

jcotton42•14mo ago

you're not awaiting DrawMap when you call it

Tvde1•14mo ago

The console probably ends as it's finished executing each line of code

jcotton42•14mo ago

also, in a console app like that, using the synchronous Thread.Sleep is fine

Tvde1•14mo ago

(it doesn't know you want to wait for a background process)

GIGA BRAIN•14mo ago

so when I call DrawMap(); I need to include an await after? and gotcha on the thread.sleep, i saw on stackoverflow that people generally avoid it

jcotton42•14mo ago

it's bad in things like GUI apps where it would block the UI thread or web apps where it would tie up threads that could be serving other requests in console apps it's not an issue before, not after await DrawMap();

GIGA BRAIN•14mo ago

ah i see ok thanks i'll see if i can implement thread.sleep instead does that also need an await before the drawmap?

jcotton42•14mo ago

no it's not async

GIGA BRAIN•14mo ago

got it so in my case was my DrawMap(); method the background process?

Tvde1•14mo ago

It starts one and returns the Task used to track the task

GIGA BRAIN•14mo ago

ah i think i get it, that's why i needed to have the "await" before calling the method

Tvde1•14mo ago

Yep Tasks are pretty complicated if you go deep into it. But mostly, await when you want to wait for it to complete :)

GIGA BRAIN•14mo ago

gotcha, thanks 😄

Accord•14mo ago

Was this issue resolved? If so, run /close - otherwise I will mark this as stale and this post will be archived until there is new activity.

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✅ Using an async method to print contents of an array