Re: Popularity contest
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- Subject: Re: Popularity contest
- From: Dirk Laurie <dpl@...>
- Date: 2011年9月27日 12:36:02 +0200
On Tue, Sep 27, 2011 at 10:33:40AM +0200, Xavier Wang wrote:
> 2011年9月26日 Artur Galyamov <artur-pub@yandex.ru>:
> > local min, max, floor in math
> >
> > No new keywords there. I think it would be nice way to easily localize
> > globals.
> Yes, I like this way, too :)
All that you really gain from that sort of syntax is that you do not
need to type the names min, max, floor twice, since the support for e.g.
from = require "from"
local min, max, floor = from.math "min, max, floor"
is easy to write directly in Lua. And if you want to use other names
than the ones in the library, you lose.
I can see myself using this proposed construction if it is available,
yes. But there are so many things I would rather have.
1. tuples, i.e. fully internalized immutable lists.
assert( (1,2,3) == (1,2,3) )
2. table constructor for keys similar to the one for values, e.g.
<a,b,c> is the same as {a=1,b=2,c=3}
3. bit rather than bit32 library, operates on numbers or strings
4. lpeg, lfs to become standard libraries
5. A table function to go with wish #2:
table.invert{10,20,30} is the same as <10,20,30>
6. `for k in t do` is OK if non-function 't' has __iter metamethod
Dirk