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- Subject: Re: lexical scoping
- From: RLake@...
- Date: Fri, 7 Sep 2001 16:46:57 -0500
> Roberto Ierusalimschy wrote:
> > Simply like this:
> > for k, v in tab do
> > local v = v
> > actors[k] = function (x) act_on(v, x) end
> > end
> Just a question: would the line "local v=v" be necessary or would
> you only get a different semantic without it? (Without it, all v's
> in the function are the same var, with the local line each function
> gets it's own v.)
Yes, that's my interpretation. But the "different semantic" is quite
different, don't you think?
I think this means I have to go through a bunch of my code, adding
wherever I find %x.
I actually quite liked the fact that Lua does functional (in the
functional programming sense) closures. I'll miss it -- but I guess
I'm in the minority.
> PS: I'm really curious on how you implement these new scoping
> rules without loosing performance.