Re: Embedding lua - passing arrays, multidimensional arrays

[Ervin Hegedüs <airween@...>]

Hi Sean,

thanks for the answer,                          

On Thu, Sep 24, 2015 at 12:05:12PM -0400, Sean Conner wrote:
> It was thus said that the Great Ervin Hegedüs once stated:
> > so, I've read the documents above - that's very-very clear.
> > Now I
> > think I understand the stack - it's not just very funny, it
> > has
> > cold logic, and pure implementation.
> >
> > Here is the sample code, what I tries first - and there is
> > the
> > state of stack, to help me to clarify the working of Lua
> > stack.
> >
> > Please review and comment it - em I understanding right it?
> >
> > /*
> >  myTable = {
> >     [0] = { ["a"] = 4, ["b"] = 2 },
> >     [1] = { ["a"] = 13, ["b"] = 37 }
> > } */
>
>   An alternative to your code:
>
>       lua_newtable(L);        /* t */
>       lua_pushinteger(L,0);   /* t n */
>       lua_newtable(L);        /* t n t */
>       lua_pushinteger(L,4);   /* t n t n */
>       lua_setfield(L,-2,"a"); /* t n t */
>       lua_pushinteger(L,2);   /* t n t n */
>       lua_setfield(L,-2,"b"); /* t n t */
>       lua_settable(L,-3);     /* t */
>
>       lua_pushinteger(L,1);   /* t n */
>       lua_newtable(L);        /* t n t */
>       lua_pushinteger(L,13);  /* t n t n */
>       lua_setfield(L,-2,"a"); /* t n t */
>       lua_pushinteger(L,37);  /* t n t n */
>       lua_setfield(L,-2,"b"); /* t n t */
>       lua_settable(L,-3);     /* t */
>       lua_setglobal(L,"t");   /* */

well, many thanks for this - I've found lua_setfield(), but this
example is very helpful.

>   The Lua stack is documented in the comments using a notation
>   from Forth.
> The top of the stack is to the right; the leftmost item is at
> index 1, while
> the right most item is -1.
>
>   I also have a function I occasionally use to help with the
>   stack
> manipulations---it dumps out the current Lua stack (it's in C):
>
>       void dump_luastack(lua_State *L)
>       {

in the Lua docs, there is the stackDump() example, I've tried
that too.

I think now the working of stack, and related funcions is clear.


Thanks again,


a.


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