ngx.null or nil

gg.lafon · 2014-07-14T19:05:16+00:00

thanks for all this useful informations.To a better understanding of how all works,i think i need to dig more about nginx internals at first, objects l...

ngx.null or nil

gg.lafon

Hello,

Can someone explain the difference between ngx.null and nil and most of all when should we use one rather than the other?

Thank you
Jerome

agentzh

Hello!

On Mon, Jul 14, 2014 at 4:05 AM, Jerome Lafon wrote:
> Can someone explain the difference between ngx.null and nil and most of all
> when should we use one rather than the other?
>

Lua tables do not allow nil "holes" among its elements and that's why
ngx.null was introduced in the first place. Also, it's mostly for
compatibility with libraries like lua-cjson.

My suggestion is: use nil or false wherever you can and only use
ngx.null when you really have to.

Regards,
-agentzh

gg.lafon

Thank you for your reply.

Jérôme

Le lundi 14 juillet 2014 21:12:54 UTC+2, agentzh a écrit :

Hello!

On Mon, Jul 14, 2014 at 4:05 AM, Jerome Lafon wrote:
> Can someone explain the difference between ngx.null and nil and most of all
> when should we use one rather than the other?
>

Lua tables do not allow nil "holes" among its elements and that's why
ngx.null was introduced in the first place. Also, it's mostly for
compatibility with libraries like lua-cjson.

My suggestion is: use nil or false wherever you can and only use
ngx.null when you really have to.

Regards,
-agentzh