Re: Simple question about traversing a table

[David Kolf <kolf@...>]

Christophe Jorssen wrote:
> Hello all,
>
> First of all, I'm quite new to lua so forgive me if
> - this is a silly question,
> - this is not the right place to ask such a silly question.

Hi,

I guess this is the right place to ask such a question.

> I have the following code.
>
> --
> function traverse_table(t)
>     if t then
>        for k=1,#t do
> 	 if type(t[k] == "table") then

Here is the mistake, the parenthesis are wrong. I guess you want

  if type(t[k]) == "table" then

Otherwise Lua would first evaluate the equation t[k] == "table" which 
would return 'false' or 'true'. 'false' or 'true' is then passed to 
'type' which would return the string "boolean". And a string (or any 
other value except false or nil) counts as true when used in an 
if-condition.

> 	    print("a table")
> 	    traverse_table(t[k])
> 	 else
> 	    print("not a table")
> 	 end
>        end
>     end
> end