I'm actually not too sure that its your fault, as usually, the program doesn't crash the calulator, it just tells you about the syntax error.

Oh I'm pretty sure it was my fault.
While doing some ... exploring, I found a __gc() function in the 'val' table, and called that with the table as an arguments, and then my calculator crashed

How do I clear a string when a certain key is pressed?

I have so far:

function on.deleteKey()
    msg = string.char()
    --also used msg = ""
end

But it's not clearing the string or it's not being called.

Didn't work. It's as though it's not calling the function in the first place.

While doing some ... exploring, I found a __gc() function in the 'val' table, and called that with the table as an arguments, and then my calculator crashed

Yep, I wrote that on HackSpire some time ago when we didn't have inspired-lua yet.



and for HOMER-16 :

msg = ""

function on.paint(gc)
  gc:drawString(msg, 10, 10, "top")
end

function on.char(ch)
  msg = ch
  platform.window:invalidate()
end

function on.enterKey()
  msg = ""
  platform.window:invalidate()
end

Make your code slightly more simple by replacing string.len(msg) with #msg

Thanks Levak. I changed it to

Code: [Select]

function on.backspaceKey()
    if string.len(msg) > 0 then
        msg = string.sub(msg, 1, string.len(msg)-1)
    end
    platform.window:invalidate()
end

function on.clearKey()
    msg = ""
    platform.window:invalidate()
end
And it works perfectly.

Oh yes I've already seen this and I wanted to ask some explanations but I forgot ^^ :
The event on.deleteKey seems not working.. The event on.backspaceKey is the one who's called instead, when pressing delete key. Is it normal ?

Thanks !

Here's something I just thought of that should recursively duplicate any table (objects are represented by tables, right?) By recursive, I mean that any element that is a table will be fully duplicated as well.
function duplicate(obj)
if type(obj) ~= "table" then
return obj
else
local t = {}
for key,value in pairs(obj) do
t[key] = duplicate(value)
end
return t
end
end
Edit: Added missing then