Re: How about removing the underscores from metatables?

[Alexander Gladysh <agladysh@...>]

On Fri, Jan 28, 2011 at 01:48, Michal Kottman <k0mpjut0r@gmail.com> wrote:
> On 27 January 2011 21:36, Steve Litt <slitt@troubleshooters.com> wrote:
>> On Thursday 27 January 2011 15:18:28 Javier Guerra Giraldez wrote:
>>> On Thu, Jan 27, 2011 at 3:09 PM, Steve Litt <slitt@troubleshooters.com>
>> wrote:

>>> > Steve, you just lost me. I thought __index is the function that gets done
>>> > when you write-access a key in the table. But A is the whole table, not a
>>> > function. What am I missing?

>>> __index can be a function or a table.

>>> a common idiom is to use the same metatable as __index; so you put
>>> there both the metamethods (__xxx) and OO-style methods

>> I'll have to do more reading on metatables, and keep in mind that__index can
>> be a function OR a table.

> Reading Programming in Lua by Roberto Ierusalimschy
> (http://www.lua.org/pil/) is VERY recommended. It is very
> friendly/easy reading, and explains all main ideas and idioms in Lua.

Steve, please note that online version is for Lua 5.0. Better buy PiL2
somewhere (the book page has links).

Alexander.