Re: Multi-value functions and tables

[erik@... (Erik Hougaard)]

Hi Hans Ole,

Please take a look the "call" function!

/Erik

----- Original Message ----- 
From: "Hans Ole Rafaelsen" <hansr@cs.uit.no>
To: "Multiple recipients of list" <lua-l@tecgraf.puc-rio.br>
Sent: Tuesday, June 26, 2001 1:54 PM
Subject: Multi-value functions and tables


> Hello,
> 
> I'm wondering if it is possible to store the result of a function
> returning multiple values in tables.
> 
> Given the following functions:
> 
> function fun1(arg)
>   return arg * 2
> end
> 
> function fun2(arg)
>   local r1, r2
> 
>   r1 = arg * 2
>   r2 = arg * 3
> 
>   return r1, r2
> end
> 
> 
> and the following tabels:
> 
> tab1 = {
>   attr1 = 2
> }
> 
> tab2 = {
>   attr1 = fun1(tab1.attr1),
>   attr2, attr3 = fun2(2)  --   <----  This results in an error!
> }
> 
> attr2, attr3 = fun2(2)    --   <----  While this is a legal statement
> 
> 
> The problem is to store both values returned from fun2() in tab2.  The
> problem seems to be the use of "," to sperate elements (attr2 and
> attr3) in the table.  I have search the documentation, but I have not
> been able to find a way to make it work the same way for tables as it
> does for the code outside tables.  Is there a way to do this, or do I
> have to re-write my functions?
> 
> Regards,
> 
> Hans Ole Rafaelsen
> 
> 
>