Re: Table + LuaJava
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- Subject: Re: Table + LuaJava
- From: "Robert G. Jakabosky" <bobby@...>
- Date: Tue, 9 Jun 2009 04:41:43 -0700
On Tuesday 09, Anselmo Junior wrote:
> But its return me the length of the table right? But dont return me if the
> 2 is nill and key 3 has some value...
Oops, sorry in your case it will not help. I was thinking about the array
part length. It would work if all the numeric keys you wanted didn't have
any gaps (i.e. 1,2,3,4,5 instead of 3,11,12)
I think you might be able to use the "next" method from LuaState.
>From the Lua 5.1 reference manual for "lua_next":
A typical traversal looks like this:
/* table is in the stack at index 't' */
lua_pushnil(L); /* first key */
while (lua_next(L, t) != 0) {
/* uses 'key' (at index -2) and 'value' (at index -1) */
printf("%s - %s\n",
lua_typename(L, lua_type(L, -2)),
lua_typename(L, lua_type(L, -1)));
/* removes 'value'; keeps 'key' for next iteration */
lua_pop(L, 1);
}
See the full description here:
http://www.lua.org/manual/5.1/manual.html#lua_next
But this will return all key/value pairs even ones with string keys, so check
the key type.
>
> But i try this method to see what happen, and return me 0
>
> state.getGlobal("init");
> state.call(0, 1);
> System.out.println(state.objLen(-1));
>
> when i use call method, the function 'init' will run and the return value
> is pushed on the stack. If i understand right, i can access this value with
> -1 index, where is the last element that be push on the stack.
yes this is right. The -1 index is the top of the stack, and -2 would be the
value below it. Index 1 is the first value you pushed onto the stack.
--
Robert G. Jakabosky