Test for a event without waiting

Is there a possiblity, to test for a event without waiting? os.pullEvent waits for a event and then the code continuing, but I want to ask for a event without stoping the code. If there no event at this time, it could be return nil or something else.

Queue a dummy event first. Though I'm not sure why you would need to do this; remember that only one CC computer executes at a time.

Why do you think you need to do this? There's probably a better way to accomplish what you're ultimately trying to do.

I need this for a game engine, who every object has his own script. The game should not stop while one object wait for input.

Wilma456, on 04 November 2016 - 06:08 PM said:

I need this for a game engine, who every object has his own script. The game should not stop while one object wait for input.

Using coroutines/the parallel API would be a much better choice here, but if you really want to do it this way you can use code like this:

os.queueEvent("dummy")
local e = {os.pullEvent()}
while e[1] ~= "dummy" do
    -- process events
    -- eg e[1] might be "char", e[2] might be "b", etc

    e = {os.pullEvent()}
end

It sounds like os.startTimer() is much more suitable than os.queueEvent(), in this case. Ultimately, no game needs a frame rate of "unlimited".

You could use parallel or coroutine, for instance

function waitForKey()
  e,k = os.pullEvent("key")
  if k == 42 then
    print("Enter!")
  else
    print("Not enter!")
  end
end
function runCode()
  while true do
    term.setTextColor(colors.lime)
    print(math.random(1,10000000))
    term.setTextColor(colors.white)
  end
end
parallel.waitForAny(runCode,waitForKey)