Re: ipairs in Lua 5.3.0-alpha
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- Subject: Re: ipairs in Lua 5.3.0-alpha
- From: Dirk Laurie <dirk.laurie@...>
- Date: 2014年8月19日 18:53:57 +0200
2014年08月19日 18:45 GMT+02:00 Sean Conner <sean@conman.org>:
> Now, __pairs or __ipairs don't exist in Lua 5.1 and of the two, I regret
> not having __pairs. I can work around __ipairs with
>
> for i = 1 , #userdata do ... end
>
> __pairs, not so much [1].
>
> -spc
>
> [1] Okay, I can work around it with a very clumsy:
>
> udindex = { 'foo' , 'bar' , 'baz' }
> for _,idx in ipairs(udindex) do
> local item = userdata[idx]
> ...
> end
Doesn't
for k,v in userdata:__pairs() do
where __pairs sits in you userdata's __index, do it?