Re: hpairs?

[Steve Litt <slitt@...>]

On Tuesday 28 December 2010 17:52:19 Doug Currie wrote:
> On Dec 28, 2010, at 5:31 PM, Steve Litt wrote:
> > And the same documentation shows the generic for statement as:
> >
> > for var_1, ···, var_n in explist do block end
> >
> > explist is supposed to be an iterator function.
> 
> No, it's "an iterator function, a state, and an initial value for the first
>  iterator variable."
> 
> > I have no idea how "next, t,
> > #t > 0 and #t or nil" evaluates to an iterator function.
> 
> next is the iterator function
> t is the state
> #t > 0 and #t or nil is the initial value for the first iterator variable
> 
> How these are used by the generic for statement is described in the pseudo
>  code at http://www.lua.org/manual/5.1/manual.html#2.4.5

Thanks Doug,

Before your help I couldn't make heads nor tails of this syntax. Even after 
your help, it still took me 45 minutes to understand this thing, but in the 
end I understood the generic for statement much better, so thank you very 
much.

Steve

Steve Litt
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