Re: Adding params to functions
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- Subject: Re: Adding params to functions
- From: Tom Wrensch <twrensch@...>
- Date: 2002年5月13日 11:07:23 -0700 (PDT)
Oops, sorry, if you're using 4.0 the closure method needs to be modified
to use up-values:
function Anin_Index(t, i)
if i == "Play" then
return function(x,y) Play(%t, x, y) end
else
return nil
end
end
Sorry 'bout that. I've mostly been using 4.1-work4.
- Tom
On 2002年5月13日, Tom Wrensch wrote:
> Here are two possibilities:
>
> First of all you can change the call code to this:
>
> Animation = LoadAnimation( "BlackDog.dat" )
> Animation:Play(1, 3)
>
> (Note the change of the '.' to a ':' in the play call).
>
> Another would be to build a closure to contain the extra information:
>
> function Anin_Index( t, i)
> if i == "Play" then
> return function(x, y) Play(t, x, y) end
> else
> return nil
> end
> end
>
> There are probably other ways to handle it, these are the two
> that come to mind.
>
> - Tom Wrensch
>
> On 2002年5月13日, Denis Lamarche wrote:
>
> > I am working in Lua 4.0. This is what I have and what I want to do:
> >
> > function Anin_Index( t, i )
> > if i == "Play" then
> > return Play
> > else
> > return nil
> > end
> > end
> >
> > function LoadAnimation( name )
> > return { NAME = name, ID = 1 }
> > end
> >
> > ...And I have a tag set to this table that overides the index method so that
> > when I do...
> >
> > Animation = LoadAnimation( "BlackDog.dat" )
> > Animation.Play( 1, 3 )
> >
> > ..The Play will actually call the 'c' function Play(), but I also want the
> > ID of that table sent to 'C' with it. How can this be done??? Can I add it
> > to the stack thats being sent to 'C' ???
>
>
>