Re: Conventional name proposal: merge

[David Favro <lua@...>]

On 12/14/2012 06:30 AM, Dirk Laurie wrote:

> local function merge(...)
>     local s, arg = {}, {...}
>     local n = select('#',...)
>     for j=1,n do if type(arg[j])=='table' then
>        for k,v in pairs(arg[j]) do s[k]=v end
>     end end
>     return s
> end

Slightly off-topic, but... my testing indicates that replacing:
    local n = select('#',...)
with:
    local n = #arg
generates smaller code that looks to be more efficient, using both 5.1 & 5.2 
luac.  Are they not equivalent?

My test code:
-- luac -l -o /dev/null test-vararg.lua

function va1(...)
   local arg = {...};
   return arg, select('#',...);
end

function va2(...)
   local arg = {...};
   return arg, #arg;
end