Re: Audience for globals discussion?

[steve donovan <steve.j.donovan@...>]

On Wed, Aug 18, 2010 at 1:28 PM, Rob Kendrick <rjek@rjek.com> wrote:
> It's difficult to put a number on it.  Personally, I avoid globals
> unless it's absolutely necessary.

And now we have the no-globals pattern:

local G = _G
local M = {}
local _ENV=nil
function M.export() G.print("paranoid module"); end
return M

Any access to the global table will result in a 'accessing nil upvalue
_ENV' error, which is arguably preferable to a silent nil result or
nil assign.

You can of course do 'local math,io = math,io' etc upfront to make
typing a wee bit easier.

steve d.