Re: [local] <namelist> = do <block> =<explist> end

["Soni L." <fakedme@...>]

On 18/08/15 03:11 PM, Dirk Laurie wrote:
> 2015-08-18 19:14 GMT+02:00 Soni L. <fakedme@gmail.com>:
>
> > I'd like a way to do
> >
> > local v
> > do v = 3 end
> >
> > without assigning nil to v.
> You can't have that in principle. No name can ever not be
> associated to a value. If you don't do
>
> local v=3
>
> (why on earth don't you?) then Lua explicitly supplies the nil.
> Otherwise that slot would contain whatever was in it before
> (which may be a user's unencrypted password) and all sorts
> of security holes open up.
The basic idea /is/ to do local v=3, but also run some code inbetween.

local v = (function() return 3 end)() lets you run code inbetween, but 
"v" doesn't get assigned nil: it gets assigned whatever the function 
returns.

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