Re: ... efficiency (was Re: class implementation)

[Chris Marrin <chris@...>]

Mike Pall wrote:
> Hi,
>
> Mark Hamburg wrote:
>
> > 1. #... should be the same as select( '#', ... ) but should be able to avoid
> > copying the values around.
>
>
> This already has a syntactic meaning (not that it would be missed
> much). But special casing #... lowers the language consistency.

I'm having real trouble understanding what select() does. What do the 
two expressions above do and what is the difference between the two?

...
> This one needs to allocate and GC a heap object _and_ copy the
> values around. Copying a handful of values around (even
> repeatedly) may or may not be more efficient.
>
>
> > (It doesn't really need to be named "varargs" since one also ought to be
> > able to write things like varargs( "red", "green", "blue" ). I just wasn't
> > feeling creative about a name.)
>
>
> apairs() -- argument pairs.
>
> Would be useful even for non-vararg cases. I'd like to have this
> as standard given that the implementation takes only a few lines
> (but it would be limited to 255 elements or needs to defer to
> table or coroutine storage).

What happens today if you just go pairs(...)??? Again, forgive my lack 
of understanding of varargs and select. The manual doesn't explain this 
well enough, IMHO...

--
chris marrin                ,""$,
chris@marrin.com          b`    $                             ,,.
                        mP     b'                            , 1$'
        ,.`           ,b`    ,`                              :$$'
     ,|`             mP    ,`                                       ,mm
   ,b"              b"   ,`            ,mm      m$$    ,m         ,`P$$
  m$`             ,b`  .` ,mm        ,'|$P   ,|"1$`  ,b$P       ,`  :$1
 b$`             ,$: :,`` |$$      ,`   $$` ,|` ,$$,,`"$$     .`    :$|
b$|            _m$`,:`    :$1   ,`     ,$Pm|`    `    :$$,..;"'     |$:
P$b,      _;b$$b$1"       |$$ ,`      ,$$"             ``'          $$
 ```"```'"    `"`         `""`        ""`                          ,P`
"As a general rule,don't solve puzzles that open portals to Hell"'