Access variables in main script from module functions

fc28222 · 2014-05-28T02:41:23+00:00

Thanks On Tuesday, 27 May 2014 16:01:14 UTC+5:30, Prashant Gaur wrote:I am using Openresty web server and i am making subrequest from lua to hit fcgi .&nbsp...

Access variables in main script from module functions

fc28222

I am experimenting in modularizing some of my codes and have a problem about variable scope. Lets say in the main lua scripts there are a bunch of local variables like

local name = "John"

local messages = {...}

And in the module there are many functions that are depending on these variables. For an extreme example suppose there is a function do_update() they would depend on all those variables in the main script.

I am wondering is there a way to allow the module functions to have access to those variable just like when you declare such function

in the main script, without explicit passing them as parameters.

agentzh

Hello!

On Tue, May 27, 2014 at 11:41 AM, arthurx wrote:
> I am experimenting in modularizing some of my codes and have a problem about
> variable scope. Lets say in the main lua scripts there are a bunch of local
> variables like
> local name = "John"
> local messages = {...}
>
> And in the module there are many functions that are depending on these
> variables. For an extreme example suppose there is a function do_update()
> they would depend on all those variables in the main script.
>

It seems that you can just follow the Object Oriented (OO) paradigm
here by encapsulating all your data fields in an "object" :) So that
you can pass your "object" as a whole to each of your functions (or
"methods" in OO's terms).

See lua-resty-redis and lua-resty-lock for such OO examples in the real world :)

Best regards,
-agentzh