RE: object methods as first class values

["Nick Trout" <ntrout@...>]

> -----Original Message-----
> From: owner-lua-l@tecgraf.puc-rio.br 
> [mailto:owner-lua-l@tecgraf.puc-rio.br] On Behalf Of Ignacio Castaño
> Sent: November 28, 2002 3:24 AM
> To: Multiple recipients of list
> Subject: object methods as first class values
> 
> 
> Hi,
> In lua functions are first class values, that's nice, because 
> lua functions
> can be used to customize behaviours the same way callbacks 
> are used in C,
> for example:
> 
> ok = Button()
> ok.onClick.add( exit )

Just add a closure as a handler:

 ok.onClick.add( function() app:exit() end )

And if you need to bind any parameters you just put them in your
closure?

 ok.onClick.add( function() local s=0 app:exit(s) end )

Or, instead of adding a function handler couldn?t you replace the
default onClick function?

 ok.onClick = function() exit() end

or

 ok.onClick = function() app:exit() end


Nick